US20110197556A1 - Filter element - Google Patents
Filter element Download PDFInfo
- Publication number
- US20110197556A1 US20110197556A1 US13/042,859 US201113042859A US2011197556A1 US 20110197556 A1 US20110197556 A1 US 20110197556A1 US 201113042859 A US201113042859 A US 201113042859A US 2011197556 A1 US2011197556 A1 US 2011197556A1
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- US
- United States
- Prior art keywords
- seal
- filter
- shell
- media pack
- media
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
- F02M35/02441—Materials or structure of filter elements, e.g. foams
- F02M35/0245—Pleated, folded, corrugated filter elements, e.g. made of paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
- B01D46/527—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes in wound arrangement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
- F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
- F02M35/0203—Manufacturing or assembling; Materials for air cleaner housings by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2271/02—Gaskets, sealings
- B01D2271/022—Axial sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2271/02—Gaskets, sealings
- B01D2271/027—Radial sealings
Definitions
- This invention relates to fluid filters, and more particularly to filters having a housing adapted for receiving a filter element including a seal member for sealing a juncture between the filter housing and the filter element when the filter element is installed in filter housing.
- Filtration devices and systems are employed in a wide range of applications for filtering contaminants from various process fluids. For example, it is known to pass air or similar gasses through filter assemblies that enclose filtration media such as filter paper to remove dust and other contaminants.
- Filters of the type used for filtering particulate matter from fluid sometimes include a filter housing having an inlet for receiving the fluid with entrained particulate matter, and an outlet for delivering the filtered fluid to a device needing fluid that is free of particulate matter.
- a filter may be provided at the air inlet of an engine or an air compressor to remove dust, water, or other particulate matter that could cause damage to the engine or compressor if it were not removed from the air entering the engine or compressor.
- the filtration media is typically enclosed within a housing that is permanently fixated within a larger overall process system that utilizes the filtered fluids.
- the filter assembly is constructed to facilitate the removal and replacement of the filtration media from the permanently fixated housing.
- the particulate matter is typically removed by a filter element that is installed within the filter housing in such a manner that the fluid must flow through a filter element, including a filter pack of porous filter material, which removes the particulate matter from the fluid. Over time, the filter pack of the filter element becomes plugged or coated with particulate matter, necessitating removal and replacement of the filter element in order for the filter to continue in its function of supplying particulate-free fluid at the outlet of the housing.
- the filtration media is typically configured into removable filter elements or filter cartridges.
- a clearance or gap is provided between the two components.
- the filter element is often provided with a seal that abuts against the filter housing.
- One particular filter element provided with a seal is disclosed in U.S. Pat. No. 6,610,117 (Gieseke), herein incorporated by reference.
- the filter housing In order to facilitate removal and replacement of the filter element, it is known to configure the filter housing to include a generally tubular wall section thereof, and provide a seal member mounted on the filter element that seals the juncture between an inner surface of the tubular wall section and the filter element, when the filter element is inserted into the housing, so that the fluid cannot bypass the filter element while flowing through the housing.
- Prior approaches to providing such sealing arrangement are disclosed in U.S. Pat. No. 6,190,432, to Gieseke, et al., and in U.S. Pat. No. 6,517,598 B2, to Anderson, et al., herein incorporated by reference.
- embodiments of the invention provide a filter assembly and a removable filter element for use therein that employ a compressible seal element.
- the seal element is spaced from the rest of the filter element and connected directly or indirectly thereto by a rigid end cap.
- the seal element abuts against that surface creating a seal.
- the sealing engagement between the seal element and the filter housing prevents process fluids from flowing through any unoccupied clearances between the filter element and filter housing and thereby avoid filtration.
- embodiments of the invention provide a separate, rigid support member that supports the seal element against the filter housing to improve the seal and prevent distortion of the compressible seal material.
- embodiments of the invention provide an end cap for connecting the seal element to the rest of the filter housing which is configured for improved attachment to the seal element. Accordingly, the seal element is sufficiently restrained against detaching from the end cap and the rest of the filter element.
- the seal element can be received into a slot or groove for retention, and the seal element can be located at various places along the filter element.
- embodiments of the invention provide an improved filter element and filter apparatus through use of a filter element that includes a filter pack, a seal member, and a seal support frame operatively connecting the seal member to the filter pack.
- the filter pack has first and second oppositely facing flow faces, and defines a longitudinal axis passing through the first and second flow faces.
- the seal support frame includes a canted annular extension thereof, for supporting the seal member. Having the seal support canted provides a more robust structure that is more inherently capable of withstanding radial and axial forces on the seal member during installation, removal, and operation of the filter element.
- the canted annular extension projects from one of the first and second flow faces at an oblique angle to the longitudinal axis, and has a first end and a distal end thereof.
- the seal support frame further includes an inwardly canted intermediate annular segment that extends between the first end of the canted annular extension and the one of the first and second flow faces of the filter pack.
- the intersection of the first end of the canted annular extension and the inwardly canted intermediate annular section forms a V-shaped, outwardly opening, annular groove at the juncture of the canted annular extension and the inwardly canted intermediate annular segment.
- the filter pack has an outer periphery thereof joining first and second oppositely facing flow faces, and defining a longitudinal axis passing through the first and second flow faces.
- the seal support frame has an outer peripheral sidewall, adapted for circumscribing the outer periphery of the filter pack.
- the seal support frame may also have a first end thereof including an annular extension, and a second end thereof spaced from the first end thereof along the longitudinal axis, with the first and second ends of the seal support frame joined by the outer peripheral sidewall of the seal support frame to define a cavity within the seal support frame for receiving the filter pack. Having the filter pack disposed in the cavity of the seal support frame provides significant additional protection for the filter pack, during installation, removal, and operation of the filter element.
- the outer peripheral sidewall may include a first and a second section thereof, with the first section extending from one of the first or second ends of the seal support frame and terminating in a distal end of the first section of the outer peripheral sidewall, and the second section thereof extending from the other of the first and second ends of the seal support frame and terminating in a distal end of the second section of the outer peripheral sidewall.
- the first and second sections of the outer peripheral sidewall are joined together by a hub extending from the distal end of one of the first or second sections of the outer peripheral sidewall, with the hub being adapted for receiving the distal end of the other of the first and second sections of the outer peripheral sidewall.
- the distal ends of the first and second sections of the outer peripheral side wall may be joined and sealed to the outer periphery of the filter pack by a single bead of adhesive forming a common bond and seal between the distal ends of the first and second sections of the outer peripheral sidewall of the seal support frame and the outer periphery of the filter pack.
- Embodiments of the invention may take the form of a filter apparatus including a housing and a filter element according to the invention.
- a filter element or filter apparatus, according to the invention may include a filter pack having a plurality of flutes of porous filter media, and additional features for facilitating manufacture of a filter element or apparatus according to the invention.
- Further embodiments of the invention may be practiced with efficacy in filters using elements formed in a variety of cross sectional shapes including circular, race-track-like, oblong or rectangular.
- FIG. 1 is a cross-sectional view of a filter assembly including a filter element employing a seal element engaging a filter housing that is designed in accordance with the teachings of the invention
- FIG. 2 is an exploded view of the filter element including filter media comprised of a multilayered corrugated sheet including a corrugated or fluted layer and a cover layer, a grill plate, and an end cap connected to the seal element;
- FIG. 3 is a detailed view of the circled area indicated in FIG. 1 illustrating the seal element connected to the rest of the filter element via the end cap and supported against the filter housing (shown in dashed lines) by a support member;
- FIG. 4 is a detailed view of the area indicated by circle 4 in FIG. 3 showing the seal element attached to the end cap by a plurality of forks;
- FIG. 5 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to an end cap and supported against the filter housing (shown in dashed lines) by a support member;
- FIG. 6 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to an end cap and supported against the filter housing (shown in dashed lines) by a support member having a strengthening rib;
- FIG. 7 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and supported against the filter housing (shown in dashed lines) by a support member;
- FIG. 8 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and mechanically attached to a support member supporting the seal element against the filter housing (shown in dashed lines);
- FIG. 9 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and is mechanically attached via a hollow knob to a support member supporting the seal element against the filter housing (shown in dashed lines);
- FIG. 10 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and is mechanically attached via a slotted hollow knob to a support member supporting the seal element against the filter housing (shown in dashed lines);
- FIG. 11 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member including a depending rib;
- FIG. 12 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member inserted between the seal element;
- FIG. 13 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member that engages a grill plate;
- FIG. 14 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is attached to a support member integral with a grill plate and connected to the rest of the filter element by an end cap;
- FIG. 15 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a wave-like leg extending beyond the filter media;
- FIG. 16 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a curved leg extending beyond the filter media;
- FIG. 17 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a leg extending beyond the filter media that includes an enlarged lobe;
- FIG. 18 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap with a tapered leg extending beyond the filter media that includes a notched surface;
- FIG. 19 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having an inward angled leg extending beyond the filter media;
- FIG. 20 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having an outward angled leg with a flange extending beyond the filter media;
- FIG. 21 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap taped to the filter media;
- FIG. 22 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having two diverging legs extending beyond the filter media;
- FIG. 23 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported by a support member against the filter housing (shown in dashed lines);
- FIG. 24 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported against the filter housing (shown in dashed lines);
- FIG. 25 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported by a support member against the filter housing (shown in dashed lines);
- FIG. 26 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and a raised shoulder portion and is supported against the filter housing (shown in dashed lines);
- FIG. 27 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and a slanted portion and is supported against the filter housing (shown in dashed lines);
- FIG. 28 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member formed integrally with the end cap and is supported against the filter housing (shown in dashed lines);
- FIG. 29 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member separated from the end cap and is supported against the filter housing (shown in dashed lines);
- FIG. 30 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member formed integrally with the grill plate and is supported against the filter housing (shown in dashed lines);
- FIG. 31 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is connected directly to the sidewall of the filter media and is supported against the filter housing (shown in dashed lines);
- FIG. 32 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element and end cap are connected to the sidewall of the filter media and is supported against the filter housing (shown in dashed lines);
- FIG. 33 is a detailed view of the circled area indicated in FIG. 1 illustrating another embodiment wherein the seal element is located proximate the inlet of the filter housing;
- FIG. 1A is a perspective partial cross-sectional view of a first exemplary embodiment of the invention, in the form of a filter element, adapted for insertion into a filter housing, but not including the filter housing;
- FIG. 2A is an orthographic cross section of the exemplary embodiment of FIG. 1A ;
- FIG. 3A is an orthographic partial cross section of an outwardly canted annular extension of a seal support frame of the exemplary embodiment of FIGS. 1A and 2A , with a seal member not shown, for clarity of illustration;
- FIG. 4A is an orthographic partial cross section of an outwardly canted annular extension of a seal support frame of the exemplary embodiment of FIGS. 1A-3A , that is identical to FIG. 3A , but with the seal member shown;
- FIG. 5A is a schematic cross section, similar to FIGS. 3A and 4A , illustrating a method for molding the seal member onto the canted annular extension;
- FIGS. 6A and 7A are orthographic cross sections taken respectively through, and between, raised locating ribs of the seal support frame
- FIG. 8A is a partial cross sectional view cutting transversely through one of the raised ribs of FIB. 7 A, along line 8 - 8 of FIG. 7A ;
- FIG. 9A is a perspective illustration of a fluted filter media, used in exemplary embodiments of the invention.
- FIGS. 10A and 11A are perspective illustrations of optional cross sectional shapes for a filter pack, according to the invention.
- FIG. 12A is an orthographic cross section of a second exemplary embodiment of the invention, in the form of a filter apparatus including a filter housing and a filter element adapted for attachment to the filter housing; and
- FIG. 13A is a partial orthographic cross section of an alternate embodiment of the invention, including an annular extension which is canted inward.
- FIG. 1 an example of a filter assembly 100 in which fluids, and particularly gasses such as air, can flow through for filtration.
- the filter assembly 100 includes a filter housing 110 defining an interior volume 114 that can accommodate a filter element 112 .
- the filter housing 110 is generally tubular in shape and extends along an axis line 102 .
- the filter housing 110 also includes an inlet 116 formed at a first end of the tubular housing and an axially spaced-apart outlet 118 formed at a second end of the housing.
- the filter assembly 100 can include a safety filter 120 located downstream of the primary filter element 112 proximate the outlet 118 . Fluids from the filter element 112 are therefore directed to the safety filter 120 for further filtration prior to exiting the filter assembly 100 .
- both the filter housing 110 and filter element 112 are generally cylindrical in shape and coaxially arranged about the axis line 102 , with the filter housing having a larger diameter than the filter element to provide a sliding or clearance fit.
- the tubular filter housing 110 and filter element 112 can be provided in other shapes such as, for example, oval and rectangular. Accordingly, geometric references such as “annular,” “ring-shaped” and the like are intended to encompass these and other shape alternatives.
- the filter element includes an inlet cover 122 that extends over the inlet 116 when the filter element is inserted into the internal volume 114 .
- the inlet cover 122 includes one or more radially outward extending flanges 124 that can abut against corresponding flanges 126 located at and projecting from the inlet 116 of the filter housing 110 .
- Threaded fasteners 128 can be threadably received in threaded holes disposed through the respective flanges. Accordingly, to remove a clogged or dirty filter element 112 , the threaded fasteners are undone and the filter element is pulled in the axial direction from the filter housing 110 .
- the filter media 130 Attached to and extending from the inlet cover 122 into the internal volume 114 is the filter media 130 that actually performs the filtration of the fluids.
- the filter media 130 is generally cylindrical and extends between a circular upstream face 132 and a spaced-apart, respectively circular downstream face 134 .
- the downstream face 134 When properly inserted into the filter housing 110 , the downstream face 134 is oriented toward the outlet 118 while the upstream face 132 is located proximate the inlet 116 . Accordingly, as illustrated by the arrows 104 , fluids passing through the filter assembly 100 will impinge upon the upstream face 132 , filtrate through the filter media 130 , and exit through the downstream face 134 .
- the filter media 130 additionally includes a cylindrically shaped, peripheral sidewall 138 extending between the circular upstream and downstream faces 132 , 134 .
- the filter media 130 is constructed from wrapped or wound layers of a corrugated, multilayered sheet.
- the multilayered sheet 140 of this construction is made from a planar layer 142 and a corrugated layer 144 , both made from a fluid permeable filter paper material.
- the corrugated layer 144 is laid over and adhered to the planar layer 142 so that the corrugations form a plurality of parallel fluted channels 146 .
- the multilayered sheet 140 is spiral wound about a central rod 148 in radially increasing layers so that the channels 146 extend between the upstream and downstream faces 132 , 134 .
- the filter media 130 can be wrapped in an outermost, adhesive layer that holds the spiral-wound, multilayered sheet 140 together.
- the each of the fluted channels 146 is configured with either an opening 150 or a plug 152 at its respective upstream and downstream faces 132 , 134 .
- a particular channel 146 that has an opening 150 at the upstream face 132 will also have a plug 152 at the downstream face 134 .
- the adjacent channel will be oppositely configured. Accordingly, fluids from the inlet 116 will readily pass into those channels 146 that are unplugged at the upstream face 132 . Because those same channels 146 are plugged at the downstream face 134 , the fluids must proceed through the filter paper layers into a channel unplugged at the downstream face 134 .
- a drop of adhesive can be inserted into the channel.
- the filter element 112 proximate the downstream face 134 is configured to abut against a stepped surface 160 formed into the filter housing.
- the stepped surface 160 includes a first annular shoulder portion 162 and a second annular shoulder portion 164 that are axially spaced-apart by an annular intermediate portion 166 .
- the first and second shoulder portions 162 , 164 and the intermediate portion 166 are all concentric about the axis line 102 with the intermediate portion extending between the shoulder portions in a generally parallel orientation with the axis line.
- the stepped surface 160 thereby radially reduces the diameter of the cylindrical filter housing 110 .
- the filter element 112 also includes a compressible seal element 170 that creates a seal between the stepped surface 160 and the filter element when the filter element is inserted into and abuts against the filter housing 110 .
- the seal element 170 is shaped as a ring-like structure that, in the cylindrical embodiment of the filter housing 110 and filter element 112 , extends annularly about the axis line 102 .
- the cross-sectional shape of the seal element 170 itself is generally rectangular and includes a radially outward directed sealing surface 172 , a generally parallel and radially inward directed inner surface 174 , and generally parallel, spaced-apart top and bottom surfaces 176 , 178 .
- the seal element 170 can be made from any suitable material including, for example, molded urethane, nitrile rubber, ethylene propylene or other synthetic rubbers.
- the material for the seal element like the filter paper comprising the filter media, can be selected in response to the fluid or gas to be filtered in a particular application.
- the seal element is axially spaced-apart from the downstream face 134 . Therefore, when the filter element 112 is axially inserted into the filter housing 110 , the sealing surface 172 of the seal element 170 and intermediate portion 166 of the stepped surface 160 slide into contact each other. When so engaged, the stepped surface 160 and the seal element 170 create an interference fit compressing the seal element and creating the seal. Additionally, the top surface 176 of the seal element 170 and the annular second shoulder 164 of the stepped surface 160 abut against each other thereby furthering the sealing effect.
- the filter element also includes an end cap 180 .
- the end cap 180 is a rigid, ring-like structure that, in the preferred embodiment illustrated in FIGS. 1 and 3 , extends annularly about the axis line 102 .
- the illustrated end cap 180 has an L-shaped cross-section including a first leg 182 oriented parallel to the axis line and a second leg 184 extending generally perpendicularly from the first leg radially inward toward the axis line.
- the end cap 180 engages a corner-like rim 188 of the filter media 130 formed by the intersection of the downstream face 134 and the cylindrical sidewall 138 .
- the first leg 182 When so engaged, the first leg 182 extends as an annular skirt about the filter media 130 while the second leg 184 is partially offset from the downstream face 134 .
- the seal element 170 is attached to and projects in the axial direction from the second leg 184 .
- the axial offset between the seal element 170 and the downstream face 134 of the filter media 130 functions as a stopping mechanism that axially positions the filter media within the filter housing 110 .
- the end cap 180 and seal element 170 also helps prevent denting or damaging of the filter media 130 proximate the downstream face 134 during insertion of the filter element 112 into the filter housing 110 .
- the annular skirt-like structure provided by the first leg 182 of the end cap 180 helps hold the layers of the filter media 130 together.
- the filter element 112 may also include a grill plate 190 .
- the grill plate 190 is a rigid, planar structure that, when assembled to the filter element 112 , lies across the downstream face 134 and is retained thereto by the end cap 180 . Axial forces from the fluid flowing through the filter media 130 are transferred by the grill plate 190 to the end cap 180 and are thereby directed to the filter housing 110 .
- the grill plate 190 also prevents the radially inner core of the filter media 130 from being axially displaced due to the same forces.
- a plurality of slots 192 are disposed therein. In the embodiment illustrated in FIG.
- the grill plate 190 is a separate circular plate that can be received within the end cap 180 and abut against the radially inward directed second leg 184 , though, in other embodiments the grill cap may be formed integrally with the end cap or formed otherwise. Both the end cap and the grill plate can be made from any suitable material including, for example, molded thermoplastic.
- the filter element 110 includes a ring-like support member 200 extending about the axis line 102 .
- the support member 200 can be made from a rigid material, such as thermoplastic or metal, and is separate or distinct from the end cap 180 that connects the seal element 170 to the rest of the filter element 112 .
- the support member 200 is an annular band with a flat, rectangular cross-section that extends about and is generally parallel to the axis line 102 .
- the support member 200 abuts against and extends axially from the second leg 184 of the end cap 180 , but in other embodiments can be spaced-apart from the second leg.
- the seal element 170 can be formed about the support member 200 so that the support member is located between the radially outward directed sealing surface 172 and the radially inward directed inner surface 174 .
- the top surface 176 of the seal element 170 extends across the support member 200 to maintain the integrity of the seal element. As will be appreciated by those of skill in the art, this construction can be accomplished where the seal element is made from a moldable material.
- each fork 202 includes a stem 206 projecting perpendicularly from a surface 204 of the end cap 180 and crescent shaped furculum 208 formed at the tip of the stem which are generally parallel to and spaced-apart from the surface. Accordingly, when the seal element 170 is molded about the support member 200 , the seal material fills around the furculum 208 and stem 206 and thus the forks 202 hold the seal element fast to the surface 204 .
- the compressible seal element 370 extends about an axis line 302 and has a generally rectangular cross-section including a radially outward directed sealing surface 372 , a spaced-apart radially inward directed inner surface 374 , and generally parallel, spaced-apart top and bottom surfaces 376 , 378 .
- the filter element also includes a ring-like end cap 380 .
- the illustrated end cap 380 is made from a rigid material, such as molded thermoplastic, and extends annularly about the axis line 302 .
- the end cap 380 has a first leg 382 arranged parallel to the axis line 302 which engages a rim-like corner 388 of the filter media 330 and a second leg 384 extending generally perpendicularly from the first leg radially toward the axis line and offset from the downstream face 334 .
- the bottom surface 378 of the seal element 370 abuts against the second leg 384 with the rest of the seal element projecting axially in the downstream direction.
- an aperture 386 is perpendicularly disposed through the second leg 384 .
- the seal element 370 includes a neck portion 390 protruding axially from the bottom surface 378 that is received through the aperture 386 .
- a flared head portion 392 is attached to the neck portion 390 .
- the second leg 384 of the end cap 380 is clamped between the head portion 392 and the bottom surface 378 of the seal element 370 .
- the described mechanical attachment can be readily produced by molding the seal element material to a pre-formed end cap.
- the support member is formed as a ring-like structure extending about the axis line 302 and that adjacently abuts the inner wall 374 of the seal element.
- the seal element 370 is supported against the stepped surface 360 of the filter housing 310 thereby maintaining a consistent seal between the filter element 312 and the filter housing.
- the cross-section of the illustrated support member 300 has a general mushroom shape including a wider, radially inward base portion 304 and a rounded, radially outward dome portion 306 that are interconnected by a narrow intermediate portion 308 .
- the seal element defines a recessed groove 394 annularly disposed into the inner wall 374 .
- the outward dome portion 306 of the support member 300 can be received into the groove 394 such that fluid flowing through the filter assembly will not dislodge the support member.
- the support member 400 includes a strengthening rib 404 (that connects to another spaced apart portion of the support member 400 ) to improve the support member's support of the compressible seal element 470 .
- the ring-like seal element 470 extends about an axis line 402 and has a generally rectangular cross-section including an radially outward directed sealing surface 472 , a spaced-apart radially inward directed inner surface 474 , and generally parallel, spaced-apart top and bottom surfaces 476 , 478 .
- the filter element also includes a ring-like end cap 480 made from a rigid material that extends about the axis line 402 .
- the illustrated end cap 480 has a first leg 482 arranged parallel to the axis line 402 which engages a rim-like corner 488 of the filter media 430 and a second leg 484 extending generally perpendicularly from the first leg radially toward the axis line and offset from the downstream face 434 .
- the bottom surface 478 of the seal element 470 abuts against the second leg 484 with the rest of the seal element projecting axially in the downstream direction.
- an aperture 486 is perpendicularly disposed through the second leg 484 of the end cap.
- the seal element 470 includes a neck portion 490 and a flared head portion 492 protruding axially from the bottom surface 378 through the aperture 486 to clamp about the second leg 484 .
- the support member is a ring-like structure extending about the axis line 402 and adjacently abuts the inner wall 474 of the seal element.
- the seal element 470 is supported against the stepped surface 460 of the filter housing 410 thereby maintaining a consistent seal between the filter element 412 and the filter housing.
- the support member 400 has a D-shaped cross-section that includes a curved front surface 406 and a flat back surface 408 .
- the seal element defines a recessed groove 494 annularly disposed into the inner surface 474 . The curved front surface 406 of the support member 400 can be received into the groove 494 such that fluid flowing through the filter assembly will not dislodge the support member.
- the strengthening rib 404 is integral with and extends between the ring-like support member 400 .
- the rib 404 can extend across the diameter of the circular support member or can extend as a smaller cord.
- multiple strengthening ribs arranged in a side-by-side manner can be provided extending between the support member.
- the rib 404 depends axially toward the downstream face 434 of the filter media 430 .
- the depending rib 404 also prevents axial displacement of the filter media due to forces from the flowing fluids.
- the support member and strengthening rib can be formed from any suitable rigid material such as, for example, molded thermoplastic.
- FIG. 7 there is illustrated another embodiment of the invention wherein the support member 500 is, in addition to supporting the seal element 570 , connected to a grill plate 590 that is generally of the above-described construction.
- the seal element 570 extends about an axis line 502 and has a generally rectangular cross-section including a radially outward directed sealing surface 572 , a spaced-apart radially inward directed inner surface 574 , and generally parallel, spaced-apart top and bottom surfaces 576 , 578 .
- the illustrated support member 500 also extends about the axis line 502 and has a T-shaped cross-section including an annular first leg 592 axially spaced-apart from and parallel to the downstream face 534 of the filter media 530 and a second leg 594 extending perpendicularly from the first leg in the axial direction.
- the seal element 570 is formed about the second leg 594 such that the bottom surface 578 abuts the first leg 592 and the seal material generally surrounds the second leg. As will be appreciated, the seal element 570 is thereby secured to the support member 500 .
- the second leg 594 can be formed as a continuous ring-like structure extending around the axis line 502 or can be formed as a plurality of posts radially-spaced along and extending from the annular first leg 592 .
- the grill plate 590 lies adjacent the downstream face 534 of the filter media 530 and is retained thereto by the first leg 592 of the support member 500 .
- the filter element also includes an end cap 580 .
- the end cap 580 is a rigid, ring-like structure that extends about the axis line 502 .
- the end cap 580 engages a corner-like rim 588 of the filter media 530 formed by the intersection of the downstream face 534 and a sidewall 538 .
- the end cap 580 includes a tip portion 582 extending beyond the downstream face 534 that is formed with a radially inward projecting hook 584 . As illustrated in FIG.
- the hook 584 extends around the first leg 592 of the support member 500 and hooks into the outward directed sealing surface 572 of the compressible seal element 570 . Accordingly, the seal element 570 , support member 500 , and grill plate 590 are secured with respect to the filter media 530 and restrained against displacement due to fluid forces.
- an aperture 686 is perpendicularly disposed through a first leg 692 of the support member.
- the seal element 670 includes a neck portion 696 and a flared head portion 698 protruding axially from the bottom surface 678 of the seal element through the aperture 686 to clamp the first leg 692 . Accordingly, the seal element 670 is secured in place with respect to the rest of the filter element by both being formed about the second leg 694 and by the mechanical attachment to the first leg 692 .
- the compressible seal element 770 extends about an axis line 702 and has a generally rectangular cross-section including a radially outward directed sealing surface 772 , a spaced-apart radially inward directed inner surface 774 , and generally parallel, spaced-apart top and bottom surfaces 776 , 778 .
- the ring-like support member 700 also extends about the axis line 702 and has a T-shaped cross-section including an annular first leg 792 axially spaced-apart from and parallel to the downstream face 734 of the filter media 730 and a second leg 794 extending perpendicularly from the first leg in the axial direction.
- the second leg 794 extends along the inner surface 774 of the seal element 770 while the first leg 792 abuts the bottom surface 778 to support the seal element against the stepped surface 760 of the filter housing 710 .
- a grill plate 790 that lies adjacent the downstream face 734 of the filter media 730 and that is held in place by to the support member 700 .
- the filter element includes a ring-like end cap 780 engaged to the filter media 730 and which extends about axis line 702 .
- the end cap 780 includes a tip portion 782 extending beyond the downstream face 734 that is formed with a radially inward projecting hook 784 that extends around the first leg 792 of the support member 700 and hooks into the outward directed sealing surface 772 of the compressible seal element 770 .
- the seal element 770 includes at least one plug 798 projecting axially from the bottom surface 778 that corresponds in position to and can be received in a void defined by the hollow knob 796 .
- receiving the plug 798 into the hollow knob 796 can be accomplished in various ways such as by molding the seal element 770 to the support member 700 or by pre-molding the seal element and attaching it to the support member.
- the seal element 770 can include multiple plugs 798 each corresponding to a knob.
- FIG. 10 there is illustrated another embodiment, similar in construction to that illustrated in FIG. 9 , in which the compressible seal element 870 is both formed about and mechanically attached to the rigid support member 800 .
- the seal element 870 extends about an axis line 802 and has a generally rectangular cross-section including a radially outward directed sealing surface 872 , a spaced-apart radially inward directed inner surface 874 , and generally parallel, spaced-apart top and bottom surfaces 876 , 878 .
- the illustrated support member 800 also extends about the axis line 802 and has a T-shaped cross-section including an annular first leg 892 axially spaced-apart from and parallel to a downstream face 834 of the filter media 830 and a second leg 894 extending perpendicularly from the first leg in the axial direction.
- the seal element 870 is formed about the support member 800 such that bottom surface 878 abuts the first leg 892 and the seal material generally surrounds the second leg 894 .
- a grill plate 890 can be located between the second leg 892 and the downstream face 834 of the filter media 830 .
- the seal element 870 includes at least one plug 898 projecting axially from the bottom surface 878 that corresponds in position to and can be received in a void defined by the hollow knob 896 thereby further attaching the seal element to the support member 800 .
- the separate support member 900 includes a strengthening rib 904 to improve the support member's support of the seal element 970 .
- the compressible seal element 970 extends about an axis line 902 and has a generally rectangular cross-section including a radially outward directed sealing surface 972 , a spaced-apart radially inward directed inner surface 974 , and generally parallel, spaced-apart top and bottom surfaces 976 , 978 .
- the filter element also includes an end cap 980 that extends about the axis line 902 .
- the illustrated end cap 980 has an L-shaped cross-section including a first leg 982 oriented parallel to the axis line 902 and a second leg 984 extending perpendicularly from the first leg radially inward toward the axis line.
- the end cap 980 engages a corner-like rim 988 of the filter media 930 .
- the bottom surface 978 of the seal element 970 abuts against the second leg 984 with the rest of the seal element projecting axially in the downstream direction.
- an aperture 986 is perpendicularly disposed through the second leg 984 of the end cap.
- the seal element 970 includes a neck portion 990 protruding axially from the bottom surface 978 through the aperture 986 and a flared head portion 992 that clamps about the second leg 984 .
- the support member is a ring-like structure extending about the axis line 902 .
- the cross-section of the support member is generally T-shaped including an annular first leg 996 axially spaced-apart from and parallel to the downstream face 934 of the filter media 930 and a second leg 998 extending perpendicularly from the first leg in the axial direction.
- the seal element 970 is formed about the second leg 998 such that the bottom surface 978 abuts against the first leg 996 and the seal material generally surrounds the second leg.
- the strengthening rib 904 is joined to and extends from the first leg 996 across the ring-like support member 900 .
- the rib 904 can extend across the diameter of the circular support member or can extend as a smaller cord.
- the rib 904 depends axially toward the downstream face 934 of the filter media 930 , thereby preventing axial displacement of the filter media.
- FIG. 12 Another embodiment of the filter element 1012 wherein the compressible seal element 1070 is mechanically attached to the rigid end cap 1080 .
- the seal element 1070 extends about the axis line 1002 and has a generally rectangular cross-section including a radially outward directed sealing surface 1072 , a spaced-apart radially inward directed inner surface 1074 , and generally parallel, spaced-apart top and bottom surfaces 1076 , 1078 .
- the illustrated end cap 1080 also extends about the axis line 1002 and has a general L-shaped cross-section including a first leg 1082 parallel to the axis line for engaging the filter media 1030 and a second leg 1084 extending perpendicularly from the first leg and offset from the downstream face 1034 of the filter media 1030 .
- the end cap includes at least one hollow knob 1086 that can receive a plug 1088 projecting from the bottom surface 1078 of the seal element.
- a separate ring-like support member 1000 extends about the axis line 1002 and runs along the inner surface 1074 of the seal element.
- the support member 1000 includes a tubular portion 1092 which is parallel to the axis line 1002 and a conical portion 1094 that projects radially inward from the tubular portion.
- the conical portion 1094 facilitates assembling the seal element 1070 and support member 1000 by enabling axially inserting the support member into the annular seal element.
- the seal element 1070 includes a backdraft 1096 proximate the top surface 1076 that extends partly over the tubular portion 1092 when the support member is correctly inserted.
- a strengthening rib 1004 can extend from the conical portion 1094 across the ring-like support member. As described above, when the support member 1000 is circular, the strengthening rib 1004 can extend as a diameter or a chord, and that multiple strengthening ribs can be provided in a side-by-side arrangement.
- FIG. 13 there is illustrated another embodiment in which the strengthening rib 1104 of the support member 1100 can engage the grill plate 1190 .
- the embodiment of FIG. 11 includes the ring-like seal element 1170 that extends about the axis line 1102 .
- the seal element 1170 includes a radially outward directed sealing surface 1172 , a spaced-apart, radially inward directed inner surface 1174 , and generally parallel, spaced-apart top and bottom surfaces 1176 , 1178 .
- the filter element also includes an end cap 1180 that engages the filter media 1130 .
- the end cap 1180 has first, skirt-like leg 1182 that is arranged parallel to the axis line 1102 which engages the filter media 1130 and a second leg 1184 extending perpendicularly from the first leg radially toward the axis line and offset from the downstream face 1134 .
- a hollow knob 1192 is formed into the second leg 1184 that can receive a plug 1194 projecting from bottom surface 1178 .
- the ring-like support member 1100 extends about the axis line 1102 and adjacently abuts against the inner surface 1174 of the seal element 1170 to support the seal element against the filter housing 1110 .
- the strengthening rib 1104 is integral with and extends from the support member 1100 generally adjacent to the downstream face 1134 of the filter media 1130 .
- the grill plate 1190 located adjacent the downstream face 1134 is the grill plate 1190 , which can be formed integrally with the end cap 1180 or formed separately.
- posts 1106 extend from the strengthening rib 1104 parallel to the downstream face 1134 that can be received between pairs of fingers 1108 that project from the grill plate. The posts 1106 can be received between the fingers 1108 in a snap-fit manner so that the grill plate 1190 holds the support member 1100 in place.
- the grill plate 1290 can be formed integrally with one or more strengthening ribs 1204 of the support member 1200 .
- the ring-like support member 1200 extends about the axis line 1202 and includes an axially parallel straight portion 1206 and a radially outward projecting stepped portion 1208 .
- the strengthening ribs 1204 extend generally from the straight portion 1206 across the ring-like support member 1200 .
- the grill plate 1290 can be suspended between multiple ribs 1204 that are aligned side-by-side across the downstream face 1234 of the filter media 1230 .
- the ribs 1204 and grill plate 1290 can be adjacent to the downstream face 1234 or, as illustrated, can be spaced-apart by a slight gap indicated by arrows 1292 .
- the embodiment of FIG. 12 includes a ring-like seal element 1270 that extends about the axis line 1202 .
- the seal element 1270 is formed about the straight portion 1206 of the support member 1200 so that the support member is located between the radially outward directed sealing surface 1272 and the radially inward directed inner surface 1274 and thus supports the seal element against the filter housing 1210 .
- the filter element includes an end cap 1280 .
- the illustrated end cap 1280 includes a skirt-like first leg 1282 that extends about the sidewall 1238 of the filter media 1230 and beyond the downstream face 1234 .
- Formed at the end of the first leg 1282 is a radially inward directed flange 1284 that extends beyond and overlaps a radially outward directed step 1298 projecting from the stepped portion 1208 of the support member 1200 .
- a compressible, annular gasket 1288 is located between the flange 1284 and the step 1298 to allow for limited sliding movement in the axial direction between the end cap 1280 and support member 1200 .
- FIG. 15 there is illustrated another embodiment of a filter assembly 1300 in which, in another aspect of the invention, the compressible seal element 1370 is connected to the rest of the filter element 1312 by being formed directly onto a portion of the rigid end cap 1380 .
- the ring-like seal element 1370 extends about the axis line 1302 and includes a radially outward directed sealing surface 1372 , a spaced-apart, radially inward directed inner surface 1374 , and generally parallel, spaced-apart top and bottom surfaces 1376 , 1378 .
- the ring-like end cap 1380 also extends about the axis line 1302 and includes a skirt-like first leg 1382 that engages the corner-like rim 1388 of the filter media 1330 .
- the end cap 1380 also includes a second leg 1384 that extends beyond the downstream face 1334 of the filter media 1330 .
- the cross-section of the second leg 1384 is formed with a wave-like shape that gradually curves radially inward as the second leg extends in the axial direction. Hence, at least substantial portions of the second leg 1380 are not parallel with the axis line 1302 .
- the second leg 1384 will produce an annular shell of varying diameters as the second leg extends in the axial direction.
- the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealing surface 1372 and the radially inward directed inner surface 1374 .
- the seal element 1370 is therefore positioned against the stepped surface 1360 of the filter housing 1310 .
- the molded seal element 1370 is sufficiently restrained against detaching from the end cap 1380 .
- a strengthening rib 1304 can be included that extends across the second leg 1384 of the ring-like end cap.
- the embodiment illustrated in FIG. 15 does not include a separate support member for supporting the seal element. However, it should be recognized that in different embodiments a separate support member be can utilized as described above.
- the compressible seal element 1470 is connected to the rest of the filter element 1412 by being formed directly onto a portion of the rigid end cap 1480 .
- the ring-like seal element 1470 extends about the axis line 1402 and includes a radially outward directed sealing surface 1472 , a spaced-apart, radially inward directed inner surface 1474 , and generally parallel, spaced-apart top and bottom surfaces 1476 , 1478 .
- the ring-like end cap 1480 also extends about the axis line 1402 and includes a skirt-like first leg 1482 that engages the corner-like rim 1488 of the filter media 1430 and a second leg 1484 to which the seal element 1470 is attached.
- a third leg 1486 interconnects the first and second legs 1482 , 1484 by extending at an angle such that the second leg is situated radially inward of the first leg.
- the second leg 1484 is generally curved so that it arcs away from the axis line 1402 and, hence, at least substantial portions of the second leg are not parallel with the axis line. Accordingly, where the components of the filter assembly are generally circular, the second leg 1484 provides a generally hyperbolic-shaped shell about the axis line 1402 .
- the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealing surface 1472 and the radially inward directed inner surface 1474 . Because of the hyperbolic shape of the second leg 1484 , the molded seal element 1470 is sufficiently restrained against detaching from the end cap 1480 . Additionally, while the embodiment illustrated in FIG. 16 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- the compressible seal element 1570 is connected to the rest of the filter element 1512 by being formed directly onto a portion of the rigid end cap 1580 .
- the ring-like seal element 1570 extends about the axis line 1502 and includes a radially outward directed sealing surface 1572 , a spaced-apart, radially inward directed inner surface 1574 , and generally parallel, spaced-apart top and bottom surfaces 1576 , 1578 .
- the ring-like end cap 1580 also extends about the axis line 1502 and includes a skirt-like first leg 1582 that engages the corner-like rim 1588 of the filter media 1530 and a second leg 1584 to which the seal element 1570 is attached.
- a third leg 1586 interconnects the first and second legs 1582 , 1584 by extending at an angle such that the second leg is situated radially inward of the first leg.
- the second leg 1584 is formed with an enlarged lobe portion 1590 .
- the lobe portion 1590 substantially enlarges the end cap 1580 and provides an object around which the seal material can be molded.
- the lobe portion 1590 is generally located between the radially outward directed sealing surface 1572 and the radially inward directed inner surface 1574 . Because of the enlarged lobe portion 1590 , the molded seal element 1570 is sufficiently restrained against detaching from the end cap 1580 .
- the embodiment illustrated in FIG. 17 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- the compressible seal element 1670 is connected to the rest of the filter element 1612 by being formed directly onto a portion of the rigid end cap 1680 .
- the ring-like seal element 1670 extends about the axis line 1602 and includes a radially outward directed sealing surface 1672 , a spaced-apart, radially inward directed inner surface 1674 , and generally parallel, spaced-apart top and bottom surfaces 1676 , 1678 .
- the ring-like end cap 1680 also extends about the axis line 1602 and includes a skirt-like first leg 1682 that engages the corner-like rim 1688 of the filter media 1630 and a second leg 1684 to which the seal element 1670 is attached.
- a third leg 1686 interconnects the first and second legs 1682 , 1684 by extending at an angle such that the second leg is situated radially inward of the first leg.
- the second leg 1684 which also extends about the axis line 1602 , is considerably thicker where it joins the third leg 1686 but tapers in the axially direction to a thinner tip portion 1690 . Hence, at least a substantial portion of the second leg 1684 is not parallel to the axis line 1602 .
- the third leg 1686 tapers generally at an angle of about 5 degrees from the axis line 1602 .
- at least one surface of the second leg 1684 can be serrated or grooved to provide a plurality of notches 1692 .
- the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealing surface 1672 and the radially inward directed inner surface 1674 . Because of the notches 1692 provided in the second leg 1684 , the molded seal element 1670 is sufficiently restrained against detaching from the end cap 1680 . Additionally, while the embodiment illustrated in FIG. 18 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- the compressible seal element 1770 is connected to the rest of the filter element 1712 by being formed directly onto a portion of the rigid end cap 1780 .
- the ring-like seal element 1770 extends about the axis line 1702 and includes a radially outward directed sealing surface 1772 , a spaced-apart, radially inward directed inner surface 1774 , and generally parallel, spaced-apart top and bottom surfaces 1776 , 1778 .
- the ring-like end cap 1780 also extends about the axis line 1702 and includes a skirt-like first leg 1782 that engages the corner-like rim 1788 of the filter media 1730 and a second leg 1784 to which the seal element 1770 is attached.
- a third leg 1786 interconnects the first and second legs 1782 , 1784 by extending at an angle such that the second leg is situated radially inward of the first leg.
- the second leg 1784 extends from the third leg 1786 at a radially inward angle with respect to the axis line 1702 such that the second leg is not parallel with the axis line.
- the angle, designated as 1790 in FIG. 19 is approximately 10 degrees.
- the second leg 1784 generally forms a cone as it extends about the axis line 1702 .
- the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealing surface 1772 and the radially inward directed inner surface 1774 .
- the molded seal element 1770 is sufficiently restrained against detaching from the end cap 1780 .
- the embodiment illustrated in FIG. 19 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- the compressible seal element 1870 is connected to the rest of the filter element 1812 by being formed directly onto a portion of the rigid end cap 1880 .
- the ring-like seal element 1870 extends about the axis line 1802 and includes a radially outward directed sealing surface 1872 , a spaced-apart, radially inward directed inner surface 1874 , and generally parallel, spaced-apart top and bottom surfaces 1876 , 1878 .
- the ring-like end cap 1880 also extends about the axis line 1802 and includes a skirt-like first leg 1882 that engages the corner-like rim 1888 of the filter media 1830 and a second leg 1884 to which the seal element 1870 is attached.
- a third leg 1886 interconnects the first and second legs 1882 , 1884 by extending at an angle such that the second leg is situated radially inward of the first leg.
- the second leg 1884 extends from the third leg 1886 at a radially outward angle with respect to the axis line 1802 such that the second leg is not parallel with the axis line.
- the angle, designated by 1890 in FIG. 20 is approximately 5 degrees.
- the second leg 1884 has formed at its distal tip a radially outward directed flange 1892 . Accordingly, in the embodiments where the filter assembly components are circular, it will be appreciated that, as the end cap 1880 extends about the axis line 1802 , the flange 1892 forms a flat annular surface extending from the shell defined by the second leg 1884 .
- the seal material is molded about the second leg and the flange 1892 such that the second leg is located between the radially outward directed sealing surface 1872 and the radially inward directed inner surface 1874 . Furthermore, there can be disposed through the flange 1892 a plurality of axially oriented holes 1894 that can receive seal material during molding. Because of the flange 1892 and seal material receiving holes 1894 , the molded seal element 1870 is sufficiently restrained against detaching from the end cap 1880 . Additionally, while the embodiment illustrated in FIG. 20 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- FIG. 21 there is illustrated another embodiment in which the compressible seal element 1970 is formed onto the rigid end cap 1980 which in turn is taped to the rest of the filter element 1912 .
- the ring-like seal element 1970 extends about the axis line 1902 and includes a radially outward directed sealing surface 1972 , a spaced-apart, radially inward directed inner surface 1974 , and generally parallel, spaced-apart top and bottom surfaces 1976 , 1978 .
- the end cap 1980 which also extends about the axis line 1902 in a ring-like fashion, includes a first leg 1982 and a second leg 1984 joined together at an angle. Accordingly in those embodiments wherein the filter elements are circular, the end cap 1980 forms a shell appearing as two abutting cones of differing angles extending about the axis line 1902 .
- the end cap 1980 is oriented such that the first leg 1982 abuts against the downstream face 1934 of the filter media 1930 and the second leg 1984 is axially directed toward the outlet of the filter housing 1910 .
- the second leg 1984 is oriented to form an angle 1990 with respect to the axis line 1902 of approximately 10 degrees.
- a length of tape 1990 is fastened about the first leg 1982 and the sidewall 1938 of the filter media 1930 .
- the compressible seal element 2070 is formed onto a rigid end cap 2080 that in turn is attached to the rest of the filter assembly 2012 .
- the ring-like seal element 2070 extends about the axis line 2002 and includes a radially outward directed sealing surface 2072 , a spaced-apart, radially inward directed inner surface 2074 , and generally parallel, spaced-apart top and bottom surfaces 2076 , 2078 .
- the ring-like end cap 2080 also extends about the axis line 2002 and includes a skirt-like first leg 2082 that engages the corner-like rim 2088 of the filter media 2030 and a second leg 2084 to which the seal element 2070 is attached.
- a third leg 2086 interconnects the first and second legs 2082 , 2084 and extends from the first leg at a radially inward directed angle.
- the second leg 2084 extends from the third leg 2086 at a radially outward directed angle such that the second and third legs diverge from their common joining point.
- the second leg 2084 extends so as to form an angle 2090 of approximately 60 degrees with respect to the axis line 2002 . Accordingly, where the components of the filter element are circular, the second and third legs 2084 , 2086 form a shell appearing as two cones abutted together at their narrower ends as the end cap 2080 extends about the axis line 2002 .
- the seal material is molded about the second leg such that the second leg extends into the inner surface 2074 and partway across the seal element to the outer sealing surface 2072 .
- Some of the seal material proximate the bottom surface 2078 can collect between the angularly interconnected second and third legs 2084 , 2086 .
- Formed at the distal tip of the second leg 2084 is an axially extending flange 2092 while formed into the second leg are a plurality of axially aligned holes 2094 . It will be appreciated that the flange 2092 can have the same material thickness as the second leg 2084 , a reduced thickness, or an increased thickness.
- the molded seal element 2070 is sufficiently restrained against detaching from the end cap 2080 .
- the embodiment illustrated in FIG. 22 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included.
- the seal element can be supported against the housing by a plurality of posts.
- FIG. 23 there is illustrated another embodiment wherein the seal element 2170 is connected to the rest of the filter element 2112 by a rigid end cap 2180 formed with a plurality of posts 2182 .
- the ring-like seal element 2170 extends about the axis line 2102 and has a generally rectangular cross-section including a outward directed sealing surface 2172 , a spaced-apart, radially inward directed inner surface 2174 , and generally parallel, spaced-apart top and bottom surfaces 2176 , 2178 .
- the ring-like end cap 2180 also extends about the axis line 2102 and includes a skirt-like first leg 2184 that engages the corner like rim 2188 of the filter media 2130 . Extending radially inward from the first leg 2184 is a second leg 2186 that is spaced apart from and generally parallel to the downstream face 2134 of the filter media 2130 . To support the second leg 2186 in its spaced-apart relationship with the downstream face 2134 , the end cap 2180 also includes one or more support studs 2190 that depend from the second leg to abut against the filter media 2130 .
- the posts extend perpendicularly from the second leg 2186 in the direction away from the filter media 2130 .
- the posts 2182 are formed about the ring-like end cap 2180 to encircle the axis line 2102 and can be spaced-apart from each other at any suitable distance including, for example, every 2 to 3 inches.
- the seal element 2170 can be formed about the posts 2182 so that the posts are sandwiched between the radially outward directed sealing surface 2172 and the radially inward directed inner surface 2174 .
- the bottom surface 2178 abuts against the second leg 2186 so that the seal element 2170 is axially offset from the downstream face 2134 .
- the posts 2182 help support the seal element against the stepped surface 2160 of the filter housing 2110 .
- the filter element 2112 can include a separately formed, ring-like support member 2100 that extends about and abuts against the inner surface 2174 .
- a secondary or safety filter element 2192 located downstream of the fluted filter element 2112 .
- the safety filter element 2192 is provided in case the fluted filter element 2112 fails or becomes displaced.
- the safety filter element 2192 includes a rigid support frame 2194 with a depending handle 2196 and a seal 2198 that engages the filter housing 2110 .
- FIG. 24 there is illustrated another embodiment wherein the seal element 2270 is connected to the rest of the filter element 2212 by an end cap 2280 having a plurality of posts 2282 .
- the seal element 2270 and end cap 2280 are similar in design to the embodiment illustrated in FIG. 23 including the plurality of posts 2282 sandwiched between a radially outward directed sealing surface 2272 and a radially inward directed inner surface 2276 of the seal element.
- the posts 2282 are formed about the axis line 2202 at a closer distance to each other, such as, for example, 0.5 inches apart. Because of the reduced distance between posts 2282 , it will be appreciated that the end cap 2280 will include a greater number of posts. Because the greater number of posts 2282 provides adequate support for the seal element 2270 , a separate support member is unnecessary in the present embodiment.
- seal element 2370 is connected to the rest of the filter element 2312 by an end cap 2380 having a plurality of posts 2382 .
- the ring-like seal element 2370 extends about the axis line 2302 and includes a radially outward directed sealing surface 2372 , a spaced-apart, radially inward directed inner surface 2374 , and generally parallel, spaced-apart top and bottom surfaces 2376 , 2378 .
- the ring-like end cap 2380 also extends about the axis line 2302 and includes a skirt-like first leg 2384 that engages the corner-like rim 2388 of the filter media 2330 and a second leg 2386 that extends parallel to and spaced-apart from the downstream face 2334 of the filter media 2330 .
- the posts 2382 extend from the second leg 2386 in a direction away from the filter media 2330 and are sandwiched between the radially outward directed sealing surface 2372 and the radially inward directed inner surface 2374 of the seal element 2370 .
- the posts 2382 can be spaced-apart from each other at any suitable distance such as, for example, every 2 to 3 inches.
- the filter element 2312 includes a separate support member 2300 .
- the support member 2300 has an annular base portion 2392 that is arranged parallel to and spaced-apart from the downstream face 2334 of the filter media.
- one or more support studs 2394 depend from the base portion to abut against the filter media 2330 .
- the second leg 2386 of the end cap 2380 can engage the base portion 2392 .
- the support member 2300 also includes a ring-like support flange 2398 that extends from the base portion 2394 adjacent to the inner surface 2374 , thereby supporting the seal element 2370 against the filter housing 2310 .
- seal element 2470 is connected to the rest of the filter element 2412 by an end cap 2480 formed with a plurality of posts 2482 .
- the ring-like seal element 2470 extends about the axis line 2402 and includes a radially outward directed sealing surface 2472 , a spaced-apart, radially inward directed inner surface 2474 , and generally parallel, spaced-apart top and bottom surfaces 2476 , 2478 .
- the ring-like end cap 2480 also extends about the axis line 2402 and includes a skirt-like first leg 2484 that engages the corner-like rim 2488 of the filter media 2430 .
- a second leg 2486 extends from the first leg 2484 and is spaced-apart from the downstream surface 2434 of the filter media 2430 by one or more support studs 2490 . Rather than extending completely parallel to the downstream face 2434 , the second leg 2486 includes a raised shoulder 2488 that depends away from the filter media 2430 proximate the support stud 2490 . The raised shoulder portion 2488 can provide the end cap 2480 with structural rigidity.
- the posts 2482 extend perpendicularly from the second leg 2486 to encircle the axis line 2402 .
- the posts 2482 can be spaced-apart from each other at any suitable distance such as, for example, every 0.25 inches.
- the posts 2482 extend adjacent to and abut against the inner surface 2474 of the seal element 2470 to support the seal element against the filter housing 2410 .
- To mechanically attach the seal element 2470 to the end cap 2480 there is disposed through the second leg 2486 radially outward of the posts 2482 a plurality of apertures 2492 .
- a flared head portion 2494 protrudes from the bottom surface 2478 of the seal element 2470 through each of the apertures 2492 to clamp the seal element to the second leg 2486 .
- FIG. 27 there is illustrated another embodiment wherein the seal element 2570 is connected to the rest of the filter element 2512 by an end cap 2580 formed with a plurality of posts 2582 .
- the filter element 2512 is similar in design to the embodiment illustrated in FIG. 26 and includes a ring-like end cap 2580 having a first leg 2584 engaging a corner-like rim 2588 of the filter media 2530 and a second leg 2586 spaced-apart from the downstream face 2534 by a support stud 2590 .
- the second leg 2586 includes a slanted portion 2592 that depends from the first leg 2584 toward the filter media 2530 and a raised shoulder portion 2594 proximate to the support stud 2590 .
- the slanted portion 2592 and the raised shoulder portion 2594 provide the second leg with structural rigidity.
- the seal element can be received in a slotted member for connecting the seal element to the rest of the filter element.
- the ring-like seal element 2670 extends about the axis line 2602 and has a radially outward directed sealing surface 2672 , a radially inward directed inner surface 2674 , and generally parallel, spaced-apart top and bottom surfaces 2676 , 2678 .
- the filter element 2612 also includes a ring-like end cap 2680 that engages a corner-like rim 2688 of the filter media 2630 .
- the end cap 2680 includes a grill plate 2682 that extends across the downstream face 2634 to assist in preventing displacement of the filter media 2630 .
- the slotted member 2690 is formed as an integral part of the end cap 2680 and extends in a skirt-like fashion adjacent to the sidewall 2638 of the filter media 2630 about the axis line 2602 .
- the slotted member 2690 defines a radially outward directed slot 2692 that can retentively receive the seal element 2670 . Because the slotted member 2690 extends adjacent to the sidewall 2638 of the filter media 2630 , both the slotted member and the seal element 2670 are situated away from the downstream face 2634 and toward the inlet of the filter housing 2610 . Hence when the filter element 2612 is inserted into the filter housing 2610 , the seal element 2670 is supported against the filter housing upstream of the stepped surface 2660 .
- the seal element 2770 can be received in a slotted member 2790 that is separate from the end cap 2780 .
- the ring-like end cap 2780 engages a corner-like rim 2788 of the filter media 2730 and includes a grill plate 2782 that extends adjacent to the downstream face 2734 to assist in preventing displacement of the filter media.
- the slotted member 2790 is formed as an annular band that extends adjacently about the sidewall 2738 of the filter media 2730 and defines a radially outward directed slot 2792 that can receive the seal element 2770 .
- the slotted member 2790 is spaced away from the downstream face 2734 and the end cap 2780 and toward the inlet of the filter housing 2710 . Hence, when the filter element 2712 is inserted into the filter housing 2710 , the seal element 2770 is supported against the filter housing upstream of the stepped surface 2760 .
- FIG. 30 there is illustrated an embodiment of a filter element 2812 in which the slotted member 2890 for connecting the seal element 2870 to the rest of the filter element is formed integrally with the grill plate 2894 but separately from the end cap 2880 .
- the ring-like seal element 2870 has a radially outward directed sealing surface 2872 , a radially inward directed inner surface 2874 , and generally parallel, spaced-apart top and bottom surfaces 2876 , 2878 .
- the grill plate 2894 extends across the downstream face 2834 of the filter media 2830 and is spaced-apart therefrom by one or more support studs 2896 .
- the ring-like end cap 2880 includes a skirt-like first leg 2882 that engages a corner-like rim 2888 of the filter media and a radially inward projecting hook 2884 that engages the grill plate.
- the slotted member 2890 is integral with and extends from the grill plate 2894 in the direction away from the downstream face 2834 . Additionally, the slotted member 2890 extends as an annular band about the axis line 2802 and defines a radially outward directed slot 2892 that can receive the seal element 2870 . Hence, the seal element 2870 is spaced-apart from the downstream face 2834 and, when the filter element 2812 is inserted into the filter housing 2810 , is supported against the stepped surface 2860 .
- the seal element 2970 is attached directly to the filter media 2930 .
- the ring-like seal element 2970 extends about the axis line 2902 and has a radially outward directed sealing surface 2972 , a radially inward directed inner surface 2974 , and generally parallel, spaced-apart top and bottom surfaces 2976 , 2978 .
- the seal element 2970 also includes a leg portion 2979 that extends from the bottom surface 2978 past the downstream face 2934 towards the upstream face and adjacently along the sidewall 2938 of the filter media 2930 and can be attached thereto by, for example, adhesive.
- the rest of the seal element 2970 including the top surface 2976 extends beyond the downstream face 2934 of the filter media 2930 so that the seal element can engage the stepped surface 2960 of the filter housing 2910 .
- the seal element can be attached to a portion of the rigid grill plate 2990 .
- the grill plate 2990 extends across the downstream face 2934 to prevent the filter media 2930 from becoming displaced during use.
- the grill plate 2990 includes an annular flange 2992 extending away from the downstream face 2934 .
- the seal element 2970 can be formed or molded about the flange 2992 . Since the seal element 2970 is attached to the filter media 2930 , the seal element additionally functions to secure the grill plate 2990 to the rest of the filter element 2912 .
- the ring-like seal element 3070 includes a radially outward directed sealing surface 3072 , a radially inward directed inner surface 3074 , and spaced-apart top and bottom surfaces 3076 , 3078 .
- a leg portion 3079 extends in the upstream direction from the bottom surface 3078 generally along the sidewall 3038 .
- the sealing surface 3072 and the top surface 3076 are located beyond the downstream face 3034 where they can engage the stepped surface 3060 of the filter housing 3010 .
- a support member 3000 in the form of an annular band can extend adjacently along the inner surface 3074 of the seal element.
- the grill plate 3090 that extends across the downstream face 3034 to prevent the filter media 3030 from becoming displaced during use. Extending from the periphery of the grill plate 3090 past the downstream face 3034 and generally along the sidewall of the filter media 3030 is a second leg portion 3092 . In the illustrated embodiment, the second leg portion 3092 extends between the sidewall 3038 and the first leg portion 3079 from the seal element 3070 . The first and second leg portions 3079 , 3092 can be adhesively attached to the filter media 3030 .
- the seal element 3170 is located proximate the upstream face 3132 of the filter media 3130 .
- the ring-like seal element 3170 includes a radially outward directed sealing surface 3172 , a radially inward directed inner surface 3174 , and spaced-apart top and bottom surfaces 3176 , 3178 . Because the seal element 3170 is located at the upstream face 3132 , the seal element engages and seals against a portion of the housing 3110 near the inlet 3116 .
- the filter housing 3110 can be formed with a counter-bore 3120 near the inlet 3116 into which the seal element 3170 can be situated.
- the filter element 3112 includes a bracket 3192 that can be connected to the upstream face 3132 of the filter media 3130 .
- the bracket 3192 defines an annular groove 3194 that extends about the sidewall 3138 of the filter media 3130 and which can receive and maintain in position the seal element 3170 .
- an integral end cap 3180 and grill plate 3190 can be provided at the downstream face 3134 engaging a corner-like rim 3188 of the filter media 3130 .
- FIGS. 1A and 2A show a first exemplary embodiment of the invention in the form of a filter element 100 A, adapted for insertion into a filter housing, but not including the filter housing, for removing particulate matter from a flow of fluid passing through the filter housing.
- the term fluid as used herein is intended to include fluids in either liquid or gaseous forms.
- the exemplary embodiments shown herein specifically illustrate an air filter of the type used for filtering intake air for engines and air compressors.
- the filter element 100 A includes a filter pack 102 A, a seal member 104 A, and a seal support frame 106 A operatively connecting the seal member 104 A to the filter pack 102 A.
- the filter pack 102 A includes first and second oppositely facing flow faces 108 A, 110 A, and defines a longitudinal axis 112 A passing through the first and second flow faces 108 A, 110 A.
- the seal support frame 106 A including a canted annular extension 114 A thereof, projecting from the first flow face 108 A at an oblique angle to the longitudinal axis 112 A, for supporting the seal member 104 A.
- annular extension 114 A extends at an angle, with respect to the longitudinal axis 112 A, which is neither parallel nor perpendicular to the longitudinal axis 112 A.
- annular is also used herein, according to its common dictionary definition, to describe a variety of ring-like shapes disposed about an axis or centerline. Annular shapes, as contemplated by the inventors, may include, but are not limited to, shapes that are round, rectangular, oval, or race-track-like with two generally straight and parallel sides joined by rounded ends.
- the canted annular extension includes a first end 116 A and a distal end 118 A thereof, with the first end 116 A of the canted annular extension 114 A being disposed nearer than the distal end 118 A thereof to both the longitudinal axis 112 A and the first flow face 108 A of the filter pack 102 A, such that the canted annular extension 114 A is canted outward from the longitudinal axis 112 A.
- the canted annular extension 114 A includes a plurality of holes 120 A extending therethrough, as best seen in FIG. 3A , with the seal member 104 A including a portion thereof extending through the holes 120 A in the canted annular extension 114 A, as shown in FIG. 4A , to help retain the seal member 104 A on the canted annular extension 114 A.
- the seal support frame 106 A of the filter element 100 A also includes an inwardly canted intermediate annular segment 122 A extending between the first end 116 A of the canted annular extension 114 A and the first flow face 108 A of the filter pack 102 A, to thereby form a V-shaped, outwardly opening, annular groove 124 A at the juncture of the canted annular extension 106 A and the inwardly canted intermediate annular segment 122 A, for receipt therein of a portion 126 A of the seal member 104 A.
- the seal member 104 A in the filter element 100 A is preferably formed from a material such as urethane foam, molded onto the canted annular extension 114 A using a mold 128 A.
- the filter element is placed into the mold 128 A with the canted annular extension 114 A facing downward, as shown in FIG. 5A .
- a material used for forming the seal member 114 A is placed in the mold 128 A and allowed to foam and rise up around the canted annular extension 114 A, and through the holes 120 A into the V-shaped groove 124 A of the seal support frame 106 A.
- the canted annular extension 114 A defines an inner surface 130 A thereof, having a raised annular rib 132 A extending therefrom for contacting and sealing against the mold 128 A, to thereby limit the extent of the seal member 104 A along the inner surface 130 A of the canted annular extension 114 A.
- the filter pack 102 A defines an outer periphery 134 A thereof, and the seal support frame includes an outer peripheral sidewall 136 A thereof adapted for circumscribing the outer periphery 134 A of the filter pack 102 A.
- the seal support frame 106 A includes a first end 138 A thereof including the canted annular extension 114 A, and a second end 140 A thereof, spaced from the first end thereof along the longitudinal axis 112 A.
- Each of the first and second ends 138 A, 140 A of the seal support frame 106 A include a skirt section thereof, which are joined together to form the outer peripheral sidewall 136 A of the seal support frame 106 A, and to define a cavity 141 within the seal support frame 106 A for receiving the filter pack 102 A.
- the first and second ends 138 A, 140 A of the seal support frame are further configured such that, when the first and second ends 138 A, 140 A of the seal support frame 106 A are joined to one another, the filter pack 102 A is retained within the cavity 141 A of the seal support frame 106 A.
- the first and second ends 138 A, 140 A of the seal support frame 106 A are joined to one another and sealed to the outer periphery 134 A of the filter pack 106 A by a single annular bead of adhesive 142 A, as best seen in FIGS. 6A and 7A .
- the single annular bead of adhesive 142 A performs the dual functions of simultaneously joining the first and second ends 138 A, 140 A of the seal support frame 106 A to the outer periphery 134 A of the filter pack 106 A, and providing a seal blocking fluid flow between the outer periphery 134 A of the filter pack 102 A and an inner surface of the peripheral annular sidewall 136 A.
- more than one bead of sealant may be used, or one or more non-continuous beads of sealant may be used. It is contemplated, however, that use of a single annular bead of adhesive 142 A will generally be preferred, because the single annular bead 142 A performing multiple functions will typically facilitate manufacture and reduce costs, in most embodiments of the invention.
- the outer peripheral sidewall 136 A includes a first section 144 A thereof extending from the first end 138 A of the seal support frame 106 A, and terminating in a distal end 146 A of the first section 144 A of the outer peripheral sidewall 136 A.
- the outer peripheral sidewall 136 A also includes a second section 148 A thereof, that extends from the second end 140 A of the seal support frame 106 A and terminates in a distal end 150 A of the second section 148 A of the outer peripheral sidewall 106 A.
- the first and second sections 144 A, 148 A of the outer peripheral sidewall 136 A are joined together with a joint formed by a hub 152 A integrally formed with and extending from the distal end 146 A of the first section 144 A of the outer peripheral sidewall 136 A, with the hub 152 A being adapted for receiving the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A.
- the hub 152 A is configured such that an inner surface 154 A of the hub 152 A, is spaced from the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A to form a gap for receiving a portion of the bead of adhesive 142 A.
- the second section 148 A of the outer peripheral sidewall 136 A includes a plurality of raised ribs 156 A that extend outward from the second section 148 A of the outer peripheral sidewall 136 A, adjacent the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A, for spacing the inner surface 154 A of the hub 152 A from the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A of the seal support frame 106 A.
- the ribs 156 A ensure that a gap of a predetermined size will be maintained between the inner surface 154 A of the hub 152 A and the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A to allow a portion of the bead of adhesive 142 A to remain in the gap when the first and second ends 138 A, 140 A of the seal support frame 106 A are joined to one another and to the outer periphery 134 A of the filter pack 102 A.
- the ribs 156 A also perform a second function, by being sized to provide a press fit of the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A into the hub 152 A.
- the press fit allows the seal support frame 106 A to be self-fixturing, to that once the first and second ends 138 A, 140 A of the seal support frame 106 A are pressed together to a desired height, the press fit will hold the first and second ends 138 A, 140 A together at the desired height while the adhesive 142 A is curing. This allows the filter element 100 A to be removed from any press equipment used for assembly, and set aside for curing of the adhesive, thereby freeing up the press equipment for use in assembling another filter element 100 A.
- the hub 152 A, the distal end 150 A of the second section 148 A of the outer peripheral side wall 136 A, and the outer periphery 134 A of the filter pack 102 A are preferably joined to one another, after the filter pack 102 A is inserted into the portion the cavity 141 formed by the first end 138 A of the seal support frame 106 A, by placing a single bead of adhesive 142 A, of a judiciously selected size, at the juncture of the distal end 146 A of the first section 144 A of the peripheral sidewall 136 A and the hub 152 A and the outer periphery of the filter pack 102 A, prior to inserting the distal end 150 A of the second section 148 A of the peripheral sidewall 136 A into the hub 152 A.
- the distal end 150 A of the second section 148 A of the peripheral sidewall 136 A is then inserted into the hub 152 A, and pressure is applied to the second end 140 A of the seal support frame 106 A to urge it into contact with the second face 110 A of the filter pack 102 A, and to push the distal end 150 A of the second section 148 A into the hub 152 A.
- the adhesive forming the single bead of adhesive 142 A is squeezed into gaps between an inner surface 154 A of the hub 152 A, that is spaced from the distal end 150 A of the second section 148 A of the outer peripheral sidewall 136 A to form a space for receiving an adhesive sealant for joining together the distal ends of the first and second sections of the outer peripheral sidewall.
- the press fit features described above allow the filter element 100 A to be self-fixturing while the adhesive 142 A is curing.
- the components of the filter element 100 A need not, however, be assembled in the same order, or by the method described above, in practicing the invention. It will be understood, by those having skill in the art, that in other embodiments of the invention, other arrangements, sequences, or methods may be used for forming and/or joining together component parts of a seal support frame, according to the invention. In other embodiments of the invention, for example, it may be desirable to have a filter pack captured within a seal support frame, according to the invention, but to not have the outer periphery joined to the seal support frame by an adhesive.
- outer peripheral sidewall 136 A of the seal support frame 106 A of the exemplary embodiment the filter element 100 A is imperforate, in other embodiments of the invention the outer peripheral sidewall may include one or more openings extending therethrough.
- the first and second ends 138 A, 140 A of the seal support frame 106 A of the exemplary embodiment of the filter element 100 A also respectively include a first end flow face screen 137 A and a second end flow face screen 139 A, that provide protection against physical damage for the first and second flow faces 108 A, 110 A of the filter pack 102 A.
- the first and second flow face screens 137 A, 139 A also serve to resist forces on the filter pack 102 A that are exerted in a direction parallel to the longitudinal axis 112 A by fluid flowing through the filter pack 102 A.
- the first and second flow face screens 137 , 139 are formed integrally with the seal support frame 106 A. In other embodiments of the invention, however, such flow face screens may be separate components, attached to or held in place by the seal support frame, or may be eliminated.
- the canted extension provides a convoluted ring-like structure that is inherently stiff in the radial direction, for resisting compression forces imposed on the seal member when the filter element is inserted into a housing.
- the flow face screens 137 A, 139 A it is not necessary, in some embodiments of the invention, for the flow face screens 137 A, 139 A to provide appreciable radial stiffening of the seal support.
- the filter pack 102 A of the exemplary embodiment of the filter element 100 A is formed from a filter media 157 A, as shown in FIG. 9A , that includes a convoluted sheet 158 A of porous filter material, for removing particulate matter from a fluid that is directed through the filter element 100 A.
- the convoluted sheet 158 A may be formed by any appropriate process, such as corrugating or pleating, but preferably by gathering, as described in a United States patent application, entitled “Gathered Filter Media and Method of Making Same,” bearing the attorney docket no. 502854 , assigned to the Assignee of the present invention, filed concurrently herewith and incorporated herein by reference.
- the convoluted sheet 158 A of porous filter material, of the filter media 157 A forms a plurality of contiguous adjacent convolutions 160 A, commonly known in the industry as flutes. Selected ends of the flutes 160 A of the filter media 157 A may be blocked, with a bead of adhesive for example, to cause fluid entering one end of some of the flutes 160 A to flow through the porous filter media into other flutes 160 A prior to exiting the filter media 157 A at an opposite end of the flutes 160 A, in the manner known in the art. Selected flutes may also include an intermediate seal 161 A, as disclosed in a United States patent application, entitled “Fluted Filter Media with Intermediate Flow Restriction and Method of Making Same,” bearing the attorney docket no. 502852, assigned to the Assignee of the present invention, filed concurrently herewith and incorporated herein by reference.
- the fluted filter media 157 A of the exemplary embodiment of the filter element 100 A also includes a face sheet 162 A attached to the convoluted sheet 158 A, for retaining the convoluted sheet 15 8 A of porous filter material in a convoluted state.
- face sheet as used herein, is intended to encompass any form of sheet or strip of generally flat, porous or non-porous, material attached to the convoluted sheet 158 A of porous filter material.
- the face sheet 162 A would preferably be formed of a porous filter material, in most embodiments of the invention.
- the filter pack 102 A of the exemplary embodiment of the filter element 100 A described above is formed by coiling the filter media 157 A to form a generally right-circular-cylinder-shaped structure, that is proportioned for insertion into a filter housing having a generally circular cross section.
- a filter pack 102 A′, and its associated filter element may have a non-circular cross section, such as the race-track shaped filter shown in FIG. 11A .
- Filter packs having other cross sectional shapes, such as square, rectangular, or polygonal, for example may also be utilized, in other embodiments of the invention, by coiling or bonding together successive layers of a fluted filter media. It is also understood that the invention is not limited to filter packs of fluted filter media. Those having skill in the art will readily recognize that the invention may also be practiced with efficacy, using other types of filter media.
- FIG. 12A shows a second exemplary embodiment of the invention, in the form of a filter apparatus 200 A, having a filter housing assembly 202 A including a filter housing 204 A and a boot 206 A, adapted for attachment thereto of a filter element 208 A.
- the filter element 208 A is of the cartridge type described herein.
- the second exemplary embodiment of the invention includes both the filter element 208 A and the filter assembly 202 A formed by the housing 204 A and the boot 206 A.
- the filter apparatus 200 A of the second exemplary embodiment also includes a safety filter 210 A, mounted in the filter housing 204 A at a point in the fluid flowpath downstream from the filter cartridge 208 A.
- a safety filter 210 A mounted in the filter housing 204 A at a point in the fluid flowpath downstream from the filter cartridge 208 A.
- Other embodiments of a filter apparatus, according to the invention, may include fewer or more components than the filter assembly 200 A of the second exemplary embodiment.
- the filter element 208 A of the filter apparatus 200 A is generally of the type described above in relation to the first exemplary embodiment.
- the filter element 208 A of the filter apparatus 200 A includes a generally right-circular-cylinder shaped filter pack 212 A of fluted filter media, and a seal support frame 214 A having an outwardly canted annular extension 216 A supporting a seal member 218 A molded to the outwardly canted extension 216 A, in the same manner as described above in relation to the filter element 100 A of the first exemplary embodiment.
- the seal support frame 214 A of the filter element 208 A of the filter apparatus 200 A of the second exemplary embodiment is also a two part structure including a hub arrangement 220 A for joining an upper frame section 222 A and a lower frame section 224 A (as oriented in FIG. 12A ) together and to the outer periphery of the filter pack with a single annular bead of adhesive (not shown) in the same manner as described above in relation to the first exemplary embodiment of the invention.
- a filter element 300 A may include an annular extension 302 A that is canted inward, rather than being canted outward as shown and described in relation to the first and second exemplary embodiments of the invention described above.
- Such an inwardly canted annular extension may or may not include through holes for receiving and retaining a portion of a seal member 304 A molded, in situ, onto the annular extension 302 A.
- annular extension 302 A canted inward results in the distal end of the annular extension 302 A having a smaller periphery than the portion of the annular extension adjacent the flow face 306 A of the filter pack 308 A.
- insertion and removal of the filter element 300 A is facilitated by having the compressive forces on the seal 304 A be generally proportional to the axial engagement length of the seal member 304 A with an inside wall of a housing (not shown).
- a seal member 104 A, 304 A may include a lead in chamfer 105 A, 305 A to facilitate insertion of a filter element 100 A, 300 A, according to the invention, into a filter housing. It is also understood that, in an embodiment of the invention, the seal member may or may not be fixedly attached to the annular extension of a seal support frame according to the invention.
- an embodiment of the invention including a seal support frame having an outer peripheral sidewall, adapted for circumscribing the outer periphery of the filter pack, a first end thereof including an annular extension, and a second end thereof spaced from the first end thereof along the longitudinal axis, with the first and second ends of the seal support frame joined by the outer peripheral sidewall of the seal support frame to define a cavity within the seal support frame for receiving the filter pack, may include an annular extension which is not canted either inward or outward.
Abstract
A filter element, and filter apparatus, include a filter pack, a seal member, and a seal support frame operatively connecting the seal member to the filter pack. The seal support frame includes an annular extension, which is preferably canted at an oblique angle to a longitudinal axis, for supporting the seal member. The seal support frame also preferably includes a first end thereof including the annular extension, and a second end thereof spaced from the first end thereof along the longitudinal axis, with the first and second ends of the seal support frame joined by a hub of the outer peripheral sidewall of the seal support frame to define a cavity within the seal support frame for receiving the filter pack. The first and second ends of the seal support frame, and the filter pack are preferably joined and sealed to one another by a single bead of adhesive.
Description
- This patent application is a continuation-in-part of co-pending U.S. patent application Ser. No. 11/939,662, filed Nov. 14, 2007, which published as U.S. Publication No. 2008/0060329, which is a continuation of U.S. patent application Ser. No. 10/979,876, filed Nov. 2, 2004, which issued as U.S. Pat. No. 7,318,851, the entire teachings and disclosures of which are incorporated herein by reference thereto. This Patent Application is also a continuation-in-part of co-pending U.S. patent application Ser. No. 12/556,976 filed Sep. 10, 2009, which published as 2010/0000934, which is a continuation of U.S. patent application Ser. No. 10/979,783, filed Nov. 2, 2004, which published as U.S. Publication No. 2006/0091061, now abandoned, the entire teachings and disclosures of which are incorporated herein by reference thereto.
- This invention relates to fluid filters, and more particularly to filters having a housing adapted for receiving a filter element including a seal member for sealing a juncture between the filter housing and the filter element when the filter element is installed in filter housing.
- Filtration devices and systems are employed in a wide range of applications for filtering contaminants from various process fluids. For example, it is known to pass air or similar gasses through filter assemblies that enclose filtration media such as filter paper to remove dust and other contaminants. Filters of the type used for filtering particulate matter from fluid sometimes include a filter housing having an inlet for receiving the fluid with entrained particulate matter, and an outlet for delivering the filtered fluid to a device needing fluid that is free of particulate matter. For example, a filter may be provided at the air inlet of an engine or an air compressor to remove dust, water, or other particulate matter that could cause damage to the engine or compressor if it were not removed from the air entering the engine or compressor.
- The filtration media is typically enclosed within a housing that is permanently fixated within a larger overall process system that utilizes the filtered fluids. Desirably, to prevent reduced filtration or clogging, the filter assembly is constructed to facilitate the removal and replacement of the filtration media from the permanently fixated housing. In such filters, the particulate matter is typically removed by a filter element that is installed within the filter housing in such a manner that the fluid must flow through a filter element, including a filter pack of porous filter material, which removes the particulate matter from the fluid. Over time, the filter pack of the filter element becomes plugged or coated with particulate matter, necessitating removal and replacement of the filter element in order for the filter to continue in its function of supplying particulate-free fluid at the outlet of the housing.
- For this reason, the filtration media is typically configured into removable filter elements or filter cartridges. To enable removal of a filter element from the filter housing, typically a clearance or gap is provided between the two components. To cause process fluids to pass through the filtration media rather than around any clearance between the filter element and filter housing, the filter element is often provided with a seal that abuts against the filter housing. One particular filter element provided with a seal is disclosed in U.S. Pat. No. 6,610,117 (Gieseke), herein incorporated by reference.
- In order to facilitate removal and replacement of the filter element, it is known to configure the filter housing to include a generally tubular wall section thereof, and provide a seal member mounted on the filter element that seals the juncture between an inner surface of the tubular wall section and the filter element, when the filter element is inserted into the housing, so that the fluid cannot bypass the filter element while flowing through the housing. Prior approaches to providing such sealing arrangement are disclosed in U.S. Pat. No. 6,190,432, to Gieseke, et al., and in U.S. Pat. No. 6,517,598 B2, to Anderson, et al., herein incorporated by reference.
- It is desirable to provide an improved filter element, and filter apparatus, having a filter element and sealing arrangement that are more robust than the arrangements used in prior filters. It is also desirable to provide such an improved filter element and filter apparatus in a form that can be manufactured in a more straight-forward and lower cost manner than prior filter elements and filter apparatuses.
- The invention provides such a filter element and filter apparatus. These and other advantages of the invention, as well as additional inventive features, will be apparent from the description of the invention provided herein.
- In one aspect, embodiments of the invention provide a filter assembly and a removable filter element for use therein that employ a compressible seal element. In a particular aspect, the seal element is spaced from the rest of the filter element and connected directly or indirectly thereto by a rigid end cap. Thus, when the filter element is inserted into a filter housing having a narrowed or stepped-in surface, the seal element abuts against that surface creating a seal. The sealing engagement between the seal element and the filter housing prevents process fluids from flowing through any unoccupied clearances between the filter element and filter housing and thereby avoid filtration.
- In a more particular aspect, embodiments of the invention provide a separate, rigid support member that supports the seal element against the filter housing to improve the seal and prevent distortion of the compressible seal material. In another aspect, embodiments of the invention provide an end cap for connecting the seal element to the rest of the filter housing which is configured for improved attachment to the seal element. Accordingly, the seal element is sufficiently restrained against detaching from the end cap and the rest of the filter element. In further aspects, the seal element can be received into a slot or groove for retention, and the seal element can be located at various places along the filter element.
- In one aspect, embodiments of the invention provide an improved filter element and filter apparatus through use of a filter element that includes a filter pack, a seal member, and a seal support frame operatively connecting the seal member to the filter pack.
- According to one aspect of the invention, the filter pack has first and second oppositely facing flow faces, and defines a longitudinal axis passing through the first and second flow faces. The seal support frame includes a canted annular extension thereof, for supporting the seal member. Having the seal support canted provides a more robust structure that is more inherently capable of withstanding radial and axial forces on the seal member during installation, removal, and operation of the filter element.
- In an embodiment of the invention, the canted annular extension projects from one of the first and second flow faces at an oblique angle to the longitudinal axis, and has a first end and a distal end thereof. The seal support frame further includes an inwardly canted intermediate annular segment that extends between the first end of the canted annular extension and the one of the first and second flow faces of the filter pack. The intersection of the first end of the canted annular extension and the inwardly canted intermediate annular section forms a V-shaped, outwardly opening, annular groove at the juncture of the canted annular extension and the inwardly canted intermediate annular segment.
- According to another aspect of the invention, the filter pack has an outer periphery thereof joining first and second oppositely facing flow faces, and defining a longitudinal axis passing through the first and second flow faces. The seal support frame has an outer peripheral sidewall, adapted for circumscribing the outer periphery of the filter pack. The seal support frame may also have a first end thereof including an annular extension, and a second end thereof spaced from the first end thereof along the longitudinal axis, with the first and second ends of the seal support frame joined by the outer peripheral sidewall of the seal support frame to define a cavity within the seal support frame for receiving the filter pack. Having the filter pack disposed in the cavity of the seal support frame provides significant additional protection for the filter pack, during installation, removal, and operation of the filter element.
- According to a further aspect of the invention, the outer peripheral sidewall may include a first and a second section thereof, with the first section extending from one of the first or second ends of the seal support frame and terminating in a distal end of the first section of the outer peripheral sidewall, and the second section thereof extending from the other of the first and second ends of the seal support frame and terminating in a distal end of the second section of the outer peripheral sidewall. The first and second sections of the outer peripheral sidewall are joined together by a hub extending from the distal end of one of the first or second sections of the outer peripheral sidewall, with the hub being adapted for receiving the distal end of the other of the first and second sections of the outer peripheral sidewall.
- In an embodiment, the distal ends of the first and second sections of the outer peripheral side wall may be joined and sealed to the outer periphery of the filter pack by a single bead of adhesive forming a common bond and seal between the distal ends of the first and second sections of the outer peripheral sidewall of the seal support frame and the outer periphery of the filter pack. Having the components of the filter element configured to allow use of a single adhesive bead for simultaneously joining the first and second sections of the outer sidewall of the seal support member to one another and to the outer periphery of the filter pack, according to the invention, significantly facilitates manufacture of the filter element by eliminating the need for applying multiple adhesive beads as is required in the manufacture of prior filter elements.
- Embodiments of the invention may take the form of a filter apparatus including a housing and a filter element according to the invention. A filter element or filter apparatus, according to the invention, may include a filter pack having a plurality of flutes of porous filter media, and additional features for facilitating manufacture of a filter element or apparatus according to the invention. Further embodiments of the invention may be practiced with efficacy in filters using elements formed in a variety of cross sectional shapes including circular, race-track-like, oblong or rectangular.
- Other aspects, objectives and advantages of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
- The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings:
-
FIG. 1 is a cross-sectional view of a filter assembly including a filter element employing a seal element engaging a filter housing that is designed in accordance with the teachings of the invention; -
FIG. 2 is an exploded view of the filter element including filter media comprised of a multilayered corrugated sheet including a corrugated or fluted layer and a cover layer, a grill plate, and an end cap connected to the seal element; -
FIG. 3 is a detailed view of the circled area indicated inFIG. 1 illustrating the seal element connected to the rest of the filter element via the end cap and supported against the filter housing (shown in dashed lines) by a support member; -
FIG. 4 is a detailed view of the area indicated by circle 4 inFIG. 3 showing the seal element attached to the end cap by a plurality of forks; -
FIG. 5 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to an end cap and supported against the filter housing (shown in dashed lines) by a support member; -
FIG. 6 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to an end cap and supported against the filter housing (shown in dashed lines) by a support member having a strengthening rib; -
FIG. 7 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and supported against the filter housing (shown in dashed lines) by a support member; -
FIG. 8 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and mechanically attached to a support member supporting the seal element against the filter housing (shown in dashed lines); -
FIG. 9 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and is mechanically attached via a hollow knob to a support member supporting the seal element against the filter housing (shown in dashed lines); -
FIG. 10 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is hooked to the rest of the filter element by an end cap and is mechanically attached via a slotted hollow knob to a support member supporting the seal element against the filter housing (shown in dashed lines); -
FIG. 11 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member including a depending rib; -
FIG. 12 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member inserted between the seal element; -
FIG. 13 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is mechanically attached to the end cap and supported against the filter housing (shown in dashed lines) by a support member that engages a grill plate; -
FIG. 14 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is attached to a support member integral with a grill plate and connected to the rest of the filter element by an end cap; -
FIG. 15 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a wave-like leg extending beyond the filter media; -
FIG. 16 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a curved leg extending beyond the filter media; -
FIG. 17 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a leg extending beyond the filter media that includes an enlarged lobe; -
FIG. 18 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap with a tapered leg extending beyond the filter media that includes a notched surface; -
FIG. 19 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having an inward angled leg extending beyond the filter media; -
FIG. 20 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having an outward angled leg with a flange extending beyond the filter media; -
FIG. 21 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap taped to the filter media; -
FIG. 22 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having two diverging legs extending beyond the filter media; -
FIG. 23 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported by a support member against the filter housing (shown in dashed lines); -
FIG. 24 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported against the filter housing (shown in dashed lines); -
FIG. 25 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and is supported by a support member against the filter housing (shown in dashed lines); -
FIG. 26 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and a raised shoulder portion and is supported against the filter housing (shown in dashed lines); -
FIG. 27 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected to an end cap having a plurality of posts and a slanted portion and is supported against the filter housing (shown in dashed lines); -
FIG. 28 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member formed integrally with the end cap and is supported against the filter housing (shown in dashed lines); -
FIG. 29 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member separated from the end cap and is supported against the filter housing (shown in dashed lines); -
FIG. 30 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is received in a slotted member formed integrally with the grill plate and is supported against the filter housing (shown in dashed lines); -
FIG. 31 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is connected directly to the sidewall of the filter media and is supported against the filter housing (shown in dashed lines); -
FIG. 32 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element and end cap are connected to the sidewall of the filter media and is supported against the filter housing (shown in dashed lines); -
FIG. 33 is a detailed view of the circled area indicated inFIG. 1 illustrating another embodiment wherein the seal element is located proximate the inlet of the filter housing; -
FIG. 1A is a perspective partial cross-sectional view of a first exemplary embodiment of the invention, in the form of a filter element, adapted for insertion into a filter housing, but not including the filter housing; -
FIG. 2A is an orthographic cross section of the exemplary embodiment ofFIG. 1A ; -
FIG. 3A is an orthographic partial cross section of an outwardly canted annular extension of a seal support frame of the exemplary embodiment ofFIGS. 1A and 2A , with a seal member not shown, for clarity of illustration; -
FIG. 4A is an orthographic partial cross section of an outwardly canted annular extension of a seal support frame of the exemplary embodiment ofFIGS. 1A-3A , that is identical toFIG. 3A , but with the seal member shown; -
FIG. 5A is a schematic cross section, similar toFIGS. 3A and 4A , illustrating a method for molding the seal member onto the canted annular extension; -
FIGS. 6A and 7A are orthographic cross sections taken respectively through, and between, raised locating ribs of the seal support frame; -
FIG. 8A is a partial cross sectional view cutting transversely through one of the raised ribs of FIB. 7A, along line 8-8 ofFIG. 7A ; -
FIG. 9A is a perspective illustration of a fluted filter media, used in exemplary embodiments of the invention; -
FIGS. 10A and 11A are perspective illustrations of optional cross sectional shapes for a filter pack, according to the invention; -
FIG. 12A is an orthographic cross section of a second exemplary embodiment of the invention, in the form of a filter apparatus including a filter housing and a filter element adapted for attachment to the filter housing; and -
FIG. 13A is a partial orthographic cross section of an alternate embodiment of the invention, including an annular extension which is canted inward. - While the invention will be described in connection with certain preferred embodiments, there is no intent to limit it to those embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.
- Now referring to the drawings, wherein like reference numbers refer to like elements, there is illustrated in
FIG. 1 an example of afilter assembly 100 in which fluids, and particularly gasses such as air, can flow through for filtration. Thefilter assembly 100 includes afilter housing 110 defining aninterior volume 114 that can accommodate afilter element 112. Thefilter housing 110 is generally tubular in shape and extends along anaxis line 102. To provide access theinterior volume 114, thefilter housing 110 also includes aninlet 116 formed at a first end of the tubular housing and an axially spaced-apartoutlet 118 formed at a second end of the housing. Because the axially opposed arrangement of theinlet 116 andoutlet 118 will cause fluid to flow along the direction of theaxis line 102 as indicated byarrows 104, this type offilter assembly 100 is often referred to as a “straight-through flow” filter assembly. In various embodiments, thefilter assembly 100 can include asafety filter 120 located downstream of theprimary filter element 112 proximate theoutlet 118. Fluids from thefilter element 112 are therefore directed to thesafety filter 120 for further filtration prior to exiting thefilter assembly 100. - To receive the
filter element 112 in theinternal volume 114, the filter element can be axially inserted through theinlet 116 of thefilter housing 110. In the preferred and illustrated embodiment, both thefilter housing 110 andfilter element 112 are generally cylindrical in shape and coaxially arranged about theaxis line 102, with the filter housing having a larger diameter than the filter element to provide a sliding or clearance fit. However, as will be appreciated by those of skill in the art, thetubular filter housing 110 andfilter element 112 can be provided in other shapes such as, for example, oval and rectangular. Accordingly, geometric references such as “annular,” “ring-shaped” and the like are intended to encompass these and other shape alternatives. - To releasably secure the
removable filter element 112 to thefilter housing 110, in the illustrated embodiment the filter element includes aninlet cover 122 that extends over theinlet 116 when the filter element is inserted into theinternal volume 114. Theinlet cover 122 includes one or more radially outward extendingflanges 124 that can abut againstcorresponding flanges 126 located at and projecting from theinlet 116 of thefilter housing 110. Threadedfasteners 128 can be threadably received in threaded holes disposed through the respective flanges. Accordingly, to remove a clogged ordirty filter element 112, the threaded fasteners are undone and the filter element is pulled in the axial direction from thefilter housing 110. - Attached to and extending from the
inlet cover 122 into theinternal volume 114 is thefilter media 130 that actually performs the filtration of the fluids. In the illustrated embodiment, thefilter media 130 is generally cylindrical and extends between a circularupstream face 132 and a spaced-apart, respectively circulardownstream face 134. When properly inserted into thefilter housing 110, thedownstream face 134 is oriented toward theoutlet 118 while theupstream face 132 is located proximate theinlet 116. Accordingly, as illustrated by thearrows 104, fluids passing through thefilter assembly 100 will impinge upon theupstream face 132, filtrate through thefilter media 130, and exit through thedownstream face 134. Thefilter media 130 additionally includes a cylindrically shaped,peripheral sidewall 138 extending between the circular upstream anddownstream faces - Preferably, the
filter media 130 is constructed from wrapped or wound layers of a corrugated, multilayered sheet. For example, referring toFIG. 2 , themultilayered sheet 140 of this construction is made from aplanar layer 142 and acorrugated layer 144, both made from a fluid permeable filter paper material. Thecorrugated layer 144 is laid over and adhered to theplanar layer 142 so that the corrugations form a plurality of parallelfluted channels 146. To produce the cylindrical shape of thefilter media 130, themultilayered sheet 140 is spiral wound about acentral rod 148 in radially increasing layers so that thechannels 146 extend between the upstream anddownstream faces filter media 130 can be wrapped in an outermost, adhesive layer that holds the spiral-wound,multilayered sheet 140 together. - To cause the fluids to pass through the planar and corrugated layers of
filter paper fluted channels 146 is configured with either anopening 150 or aplug 152 at its respective upstream anddownstream faces FIG. 1 , aparticular channel 146 that has anopening 150 at theupstream face 132 will also have aplug 152 at thedownstream face 134. The adjacent channel will be oppositely configured. Accordingly, fluids from theinlet 116 will readily pass into thosechannels 146 that are unplugged at theupstream face 132. Because thosesame channels 146 are plugged at thedownstream face 134, the fluids must proceed through the filter paper layers into a channel unplugged at thedownstream face 134. To plug a particular channel, a drop of adhesive can be inserted into the channel. - To ensure that fluids flow through the
filter media 130 rather than any unoccupied portion of theinternal volume 114 remaining between the filter media andtubular filter housing 110 and thereby avoid filtration, thefilter element 112 proximate thedownstream face 134 is configured to abut against a steppedsurface 160 formed into the filter housing. The steppedsurface 160 includes a firstannular shoulder portion 162 and a secondannular shoulder portion 164 that are axially spaced-apart by an annularintermediate portion 166. The first andsecond shoulder portions intermediate portion 166 are all concentric about theaxis line 102 with the intermediate portion extending between the shoulder portions in a generally parallel orientation with the axis line. In the illustrated embodiment, the steppedsurface 160 thereby radially reduces the diameter of thecylindrical filter housing 110. - The
filter element 112 also includes acompressible seal element 170 that creates a seal between the steppedsurface 160 and the filter element when the filter element is inserted into and abuts against thefilter housing 110. Theseal element 170 is shaped as a ring-like structure that, in the cylindrical embodiment of thefilter housing 110 andfilter element 112, extends annularly about theaxis line 102. As illustrated inFIG. 3 , the cross-sectional shape of theseal element 170 itself is generally rectangular and includes a radially outward directed sealingsurface 172, a generally parallel and radially inward directedinner surface 174, and generally parallel, spaced-apart top andbottom surfaces seal element 170 can be made from any suitable material including, for example, molded urethane, nitrile rubber, ethylene propylene or other synthetic rubbers. In fact, the material for the seal element, like the filter paper comprising the filter media, can be selected in response to the fluid or gas to be filtered in a particular application. - To engage the
seal element 170 and the steppedsurface 160 in a manner that creates the seal, the seal element is axially spaced-apart from thedownstream face 134. Therefore, when thefilter element 112 is axially inserted into thefilter housing 110, the sealingsurface 172 of theseal element 170 andintermediate portion 166 of the steppedsurface 160 slide into contact each other. When so engaged, the steppedsurface 160 and theseal element 170 create an interference fit compressing the seal element and creating the seal. Additionally, thetop surface 176 of theseal element 170 and the annularsecond shoulder 164 of the steppedsurface 160 abut against each other thereby furthering the sealing effect. - To connect the
seal element 170 to the rest of thefilter element 112, the filter element also includes anend cap 180. Theend cap 180 is a rigid, ring-like structure that, in the preferred embodiment illustrated inFIGS. 1 and 3 , extends annularly about theaxis line 102. Theillustrated end cap 180 has an L-shaped cross-section including afirst leg 182 oriented parallel to the axis line and asecond leg 184 extending generally perpendicularly from the first leg radially inward toward the axis line. Theend cap 180 engages a corner-like rim 188 of thefilter media 130 formed by the intersection of thedownstream face 134 and thecylindrical sidewall 138. When so engaged, thefirst leg 182 extends as an annular skirt about thefilter media 130 while thesecond leg 184 is partially offset from thedownstream face 134. Theseal element 170 is attached to and projects in the axial direction from thesecond leg 184. The axial offset between theseal element 170 and thedownstream face 134 of thefilter media 130 functions as a stopping mechanism that axially positions the filter media within thefilter housing 110. Theend cap 180 andseal element 170 also helps prevent denting or damaging of thefilter media 130 proximate thedownstream face 134 during insertion of thefilter element 112 into thefilter housing 110. Additionally, the annular skirt-like structure provided by thefirst leg 182 of theend cap 180 helps hold the layers of thefilter media 130 together. - In addition to the
end cap 180, referring toFIG. 2 , thefilter element 112 may also include agrill plate 190. Thegrill plate 190 is a rigid, planar structure that, when assembled to thefilter element 112, lies across thedownstream face 134 and is retained thereto by theend cap 180. Axial forces from the fluid flowing through thefilter media 130 are transferred by thegrill plate 190 to theend cap 180 and are thereby directed to thefilter housing 110. Thegrill plate 190 also prevents the radially inner core of thefilter media 130 from being axially displaced due to the same forces. To allow fluids exiting thedownstream face 134 to pass through thegrill plate 190, a plurality ofslots 192 are disposed therein. In the embodiment illustrated inFIG. 2 , thegrill plate 190 is a separate circular plate that can be received within theend cap 180 and abut against the radially inward directedsecond leg 184, though, in other embodiments the grill cap may be formed integrally with the end cap or formed otherwise. Both the end cap and the grill plate can be made from any suitable material including, for example, molded thermoplastic. - Referring to
FIG. 3 , to support theseal element 170 against the steppedsurface 160 and prevent distortion of the compressible seal material, in one aspect of the invention thefilter element 110 includes a ring-like support member 200 extending about theaxis line 102. Thesupport member 200 can be made from a rigid material, such as thermoplastic or metal, and is separate or distinct from theend cap 180 that connects theseal element 170 to the rest of thefilter element 112. In the illustrated embodiment, thesupport member 200 is an annular band with a flat, rectangular cross-section that extends about and is generally parallel to theaxis line 102. Furthermore, in the embodiment illustrated inFIG. 3 , thesupport member 200 abuts against and extends axially from thesecond leg 184 of theend cap 180, but in other embodiments can be spaced-apart from the second leg. Theseal element 170 can be formed about thesupport member 200 so that the support member is located between the radially outward directed sealingsurface 172 and the radially inward directedinner surface 174. Thetop surface 176 of theseal element 170 extends across thesupport member 200 to maintain the integrity of the seal element. As will be appreciated by those of skill in the art, this construction can be accomplished where the seal element is made from a moldable material. - To mechanically attach the
seal element 170 to theend cap 180, as illustrated inFIG. 4 , or in other embodiments to thesupport member 200, projectingforks 202 can be formed as part of the end cap or support member. As illustrated, eachfork 202 includes astem 206 projecting perpendicularly from asurface 204 of theend cap 180 and crescent shapedfurculum 208 formed at the tip of the stem which are generally parallel to and spaced-apart from the surface. Accordingly, when theseal element 170 is molded about thesupport member 200, the seal material fills around thefurculum 208 and stem 206 and thus theforks 202 hold the seal element fast to thesurface 204. - Referring to
FIG. 5 , there is illustrated an embodiment of the invention in which thesupport member 300 abuts against theseal element 370, as opposed to the support member being molded within the seal element. As described above, thecompressible seal element 370 extends about anaxis line 302 and has a generally rectangular cross-section including a radially outward directed sealingsurface 372, a spaced-apart radially inward directedinner surface 374, and generally parallel, spaced-apart top andbottom surfaces seal element 370 to the rest of thefilter element 312, the filter element also includes a ring-like end cap 380. Theillustrated end cap 380 is made from a rigid material, such as molded thermoplastic, and extends annularly about theaxis line 302. Theend cap 380 has afirst leg 382 arranged parallel to theaxis line 302 which engages a rim-like corner 388 of thefilter media 330 and asecond leg 384 extending generally perpendicularly from the first leg radially toward the axis line and offset from thedownstream face 334. Thebottom surface 378 of theseal element 370 abuts against thesecond leg 384 with the rest of the seal element projecting axially in the downstream direction. - To mechanically attach the
seal element 370 to theend cap 380, anaperture 386 is perpendicularly disposed through thesecond leg 384. Theseal element 370 includes aneck portion 390 protruding axially from thebottom surface 378 that is received through theaperture 386. A flaredhead portion 392 is attached to theneck portion 390. Hence, thesecond leg 384 of theend cap 380 is clamped between thehead portion 392 and thebottom surface 378 of theseal element 370. As will be appreciated by those of skill in the art, the described mechanical attachment can be readily produced by molding the seal element material to a pre-formed end cap. - To supportingly engage the
seal element 370 with thesupport member 300, the support member is formed as a ring-like structure extending about theaxis line 302 and that adjacently abuts theinner wall 374 of the seal element. By abutting the ring-like support member 300 against theinner wall 374, theseal element 370 is supported against the steppedsurface 360 of thefilter housing 310 thereby maintaining a consistent seal between thefilter element 312 and the filter housing. The cross-section of the illustratedsupport member 300 has a general mushroom shape including a wider, radiallyinward base portion 304 and a rounded, radially outwarddome portion 306 that are interconnected by a narrowintermediate portion 308. To maintain engagement between theseal element 370 and thesupport member 300, the seal element defines a recessedgroove 394 annularly disposed into theinner wall 374. Theoutward dome portion 306 of thesupport member 300 can be received into thegroove 394 such that fluid flowing through the filter assembly will not dislodge the support member. - Referring to
FIG. 6 , there is illustrated another embodiment of the invention wherein thesupport member 400 includes a strengthening rib 404 (that connects to another spaced apart portion of the support member 400) to improve the support member's support of thecompressible seal element 470. The ring-like seal element 470 extends about anaxis line 402 and has a generally rectangular cross-section including an radially outward directed sealingsurface 472, a spaced-apart radially inward directedinner surface 474, and generally parallel, spaced-apart top andbottom surfaces seal element 470 to the rest of thefilter element 412, the filter element also includes a ring-like end cap 480 made from a rigid material that extends about theaxis line 402. Theillustrated end cap 480 has afirst leg 482 arranged parallel to theaxis line 402 which engages a rim-like corner 488 of thefilter media 430 and asecond leg 484 extending generally perpendicularly from the first leg radially toward the axis line and offset from thedownstream face 434. Thebottom surface 478 of theseal element 470 abuts against thesecond leg 484 with the rest of the seal element projecting axially in the downstream direction. - To mechanically attach the
seal element 470 to theend cap 480, anaperture 486 is perpendicularly disposed through thesecond leg 484 of the end cap. Theseal element 470 includes aneck portion 490 and a flaredhead portion 492 protruding axially from thebottom surface 378 through theaperture 486 to clamp about thesecond leg 484. - To supportingly engage the
seal element 470 with thesupport member 400, the support member is a ring-like structure extending about theaxis line 402 and adjacently abuts theinner wall 474 of the seal element. By abutting the ring-like support member 400 against theinner wall 474, theseal element 470 is supported against the steppedsurface 460 of thefilter housing 410 thereby maintaining a consistent seal between thefilter element 412 and the filter housing. In the illustrated embodiment, thesupport member 400 has a D-shaped cross-section that includes a curvedfront surface 406 and aflat back surface 408. To maintain engagement between theseal element 470 and thesupport member 400, the seal element defines a recessedgroove 494 annularly disposed into theinner surface 474. The curvedfront surface 406 of thesupport member 400 can be received into thegroove 494 such that fluid flowing through the filter assembly will not dislodge the support member. - The strengthening
rib 404 is integral with and extends between the ring-like support member 400. As will be appreciated, in those embodiments in which thesupport member 400 is circular, therib 404 can extend across the diameter of the circular support member or can extend as a smaller cord. Additionally, multiple strengthening ribs arranged in a side-by-side manner can be provided extending between the support member. Furthermore, in the illustrated embodiment, therib 404 depends axially toward thedownstream face 434 of thefilter media 430. Hence, in addition to strengthening thesupport member 400, the dependingrib 404 also prevents axial displacement of the filter media due to forces from the flowing fluids. The support member and strengthening rib can be formed from any suitable rigid material such as, for example, molded thermoplastic. - Referring to
FIG. 7 , there is illustrated another embodiment of the invention wherein thesupport member 500 is, in addition to supporting theseal element 570, connected to agrill plate 590 that is generally of the above-described construction. Theseal element 570 extends about anaxis line 502 and has a generally rectangular cross-section including a radially outward directed sealingsurface 572, a spaced-apart radially inward directedinner surface 574, and generally parallel, spaced-apart top andbottom surfaces support member 500 also extends about theaxis line 502 and has a T-shaped cross-section including an annularfirst leg 592 axially spaced-apart from and parallel to thedownstream face 534 of thefilter media 530 and asecond leg 594 extending perpendicularly from the first leg in the axial direction. Theseal element 570 is formed about thesecond leg 594 such that thebottom surface 578 abuts thefirst leg 592 and the seal material generally surrounds the second leg. As will be appreciated, theseal element 570 is thereby secured to thesupport member 500. In various embodiments, thesecond leg 594 can be formed as a continuous ring-like structure extending around theaxis line 502 or can be formed as a plurality of posts radially-spaced along and extending from the annularfirst leg 592. Thegrill plate 590 lies adjacent thedownstream face 534 of thefilter media 530 and is retained thereto by thefirst leg 592 of thesupport member 500. - To connect the
seal element 570,support member 500 andgrill plate 590 to the rest of thefilter element 512, the filter element also includes anend cap 580. Theend cap 580 is a rigid, ring-like structure that extends about theaxis line 502. Theend cap 580 engages a corner-like rim 588 of thefilter media 530 formed by the intersection of thedownstream face 534 and asidewall 538. When so engaged, theend cap 580 includes atip portion 582 extending beyond thedownstream face 534 that is formed with a radially inward projectinghook 584. As illustrated inFIG. 7 , thehook 584 extends around thefirst leg 592 of thesupport member 500 and hooks into the outward directed sealingsurface 572 of thecompressible seal element 570. Accordingly, theseal element 570,support member 500, andgrill plate 590 are secured with respect to thefilter media 530 and restrained against displacement due to fluid forces. - Referring to
FIG. 8 , in an embodiment similar in construction to that illustrated inFIG. 7 , to mechanically attach theseal element 670 to thesupport member 600, anaperture 686 is perpendicularly disposed through afirst leg 692 of the support member. Theseal element 670 includes aneck portion 696 and a flaredhead portion 698 protruding axially from thebottom surface 678 of the seal element through theaperture 686 to clamp thefirst leg 692. Accordingly, theseal element 670 is secured in place with respect to the rest of the filter element by both being formed about thesecond leg 694 and by the mechanical attachment to thefirst leg 692. - Referring to
FIG. 9 , there is illustrated an embodiment in which thesupport member 700 and theseal element 770 are mechanically attached together. Thecompressible seal element 770 extends about anaxis line 702 and has a generally rectangular cross-section including a radially outward directed sealingsurface 772, a spaced-apart radially inward directedinner surface 774, and generally parallel, spaced-apart top andbottom surfaces like support member 700 also extends about theaxis line 702 and has a T-shaped cross-section including an annularfirst leg 792 axially spaced-apart from and parallel to thedownstream face 734 of thefilter media 730 and asecond leg 794 extending perpendicularly from the first leg in the axial direction. Thesecond leg 794 extends along theinner surface 774 of theseal element 770 while thefirst leg 792 abuts thebottom surface 778 to support the seal element against the steppedsurface 760 of the filter housing 710. Also included is agrill plate 790 that lies adjacent thedownstream face 734 of thefilter media 730 and that is held in place by to thesupport member 700. - To connect the
seal element 770 andsupport member 700 to the rest of thefilter element 712, the filter element includes a ring-like end cap 780 engaged to thefilter media 730 and which extends aboutaxis line 702. Theend cap 780 includes atip portion 782 extending beyond thedownstream face 734 that is formed with a radially inward projectinghook 784 that extends around thefirst leg 792 of thesupport member 700 and hooks into the outward directed sealingsurface 772 of thecompressible seal element 770. - To mechanically attach the
support member 700 and seal element together 770, there is formed into thefirst leg 792 of the support member one or morehollow knobs 796 that are directed toward thedownstream face 734 of thefilter media 730. Furthermore, theseal element 770 includes at least oneplug 798 projecting axially from thebottom surface 778 that corresponds in position to and can be received in a void defined by thehollow knob 796. As will be readily appreciated, receiving theplug 798 into thehollow knob 796 can be accomplished in various ways such as by molding theseal element 770 to thesupport member 700 or by pre-molding the seal element and attaching it to the support member. As will also be appreciated, where thesupport member 700 includes multiplehollow knobs 796 formed about the ring-like support member, theseal element 770 can includemultiple plugs 798 each corresponding to a knob. - Referring to
FIG. 10 , there is illustrated another embodiment, similar in construction to that illustrated inFIG. 9 , in which thecompressible seal element 870 is both formed about and mechanically attached to therigid support member 800. Theseal element 870 extends about anaxis line 802 and has a generally rectangular cross-section including a radially outward directed sealingsurface 872, a spaced-apart radially inward directed inner surface 874, and generally parallel, spaced-apart top andbottom surfaces support member 800 also extends about theaxis line 802 and has a T-shaped cross-section including an annularfirst leg 892 axially spaced-apart from and parallel to adownstream face 834 of thefilter media 830 and asecond leg 894 extending perpendicularly from the first leg in the axial direction. Theseal element 870 is formed about thesupport member 800 such thatbottom surface 878 abuts thefirst leg 892 and the seal material generally surrounds thesecond leg 894. Additionally, agrill plate 890 can be located between thesecond leg 892 and thedownstream face 834 of thefilter media 830. - To provide the mechanical attachment, there is formed into the
first leg 892 of thesupport member 800 one or morehollow knobs 896 that are directed toward thedownstream face 834 offilter media 830. Theseal element 870 includes at least oneplug 898 projecting axially from thebottom surface 878 that corresponds in position to and can be received in a void defined by thehollow knob 896 thereby further attaching the seal element to thesupport member 800. In the illustrated embodiment, there is disposed through the knob 896 aslit 899 that allows the seal material from theplug 898 to extrude partially about the knob and thefirst leg 892 further improving the mechanical attachment. - Referring to
FIG. 11 , there is illustrated another embodiment wherein the separate support member 900 includes a strengtheningrib 904 to improve the support member's support of theseal element 970. Thecompressible seal element 970 extends about anaxis line 902 and has a generally rectangular cross-section including a radially outward directed sealingsurface 972, a spaced-apart radially inward directed inner surface 974, and generally parallel, spaced-apart top andbottom surfaces seal element 970 to the rest of thefilter element 912, the filter element also includes anend cap 980 that extends about theaxis line 902. Theillustrated end cap 980 has an L-shaped cross-section including afirst leg 982 oriented parallel to theaxis line 902 and asecond leg 984 extending perpendicularly from the first leg radially inward toward the axis line. Theend cap 980 engages a corner-like rim 988 of thefilter media 930. Thebottom surface 978 of theseal element 970 abuts against thesecond leg 984 with the rest of the seal element projecting axially in the downstream direction. - To mechanically attach the
seal element 970 to theend cap 980, anaperture 986 is perpendicularly disposed through thesecond leg 984 of the end cap. Theseal element 970 includes aneck portion 990 protruding axially from thebottom surface 978 through theaperture 986 and a flaredhead portion 992 that clamps about thesecond leg 984. - To supportingly engage the
seal element 970 with the support member 900, the support member is a ring-like structure extending about theaxis line 902. In the illustrated embodiment, the cross-section of the support member is generally T-shaped including an annularfirst leg 996 axially spaced-apart from and parallel to thedownstream face 934 of thefilter media 930 and asecond leg 998 extending perpendicularly from the first leg in the axial direction. Theseal element 970 is formed about thesecond leg 998 such that thebottom surface 978 abuts against thefirst leg 996 and the seal material generally surrounds the second leg. - The strengthening
rib 904 is joined to and extends from thefirst leg 996 across the ring-like support member 900. As will be appreciated, in those embodiments in which the support member 900 is circular, therib 904 can extend across the diameter of the circular support member or can extend as a smaller cord. Furthermore, in the illustrated embodiment, therib 904 depends axially toward thedownstream face 934 of thefilter media 930, thereby preventing axial displacement of the filter media. - There is illustrated in
FIG. 12 another embodiment of thefilter element 1012 wherein thecompressible seal element 1070 is mechanically attached to therigid end cap 1080. Theseal element 1070 extends about theaxis line 1002 and has a generally rectangular cross-section including a radially outward directed sealingsurface 1072, a spaced-apart radially inward directedinner surface 1074, and generally parallel, spaced-apart top andbottom surfaces illustrated end cap 1080 also extends about theaxis line 1002 and has a general L-shaped cross-section including a first leg 1082 parallel to the axis line for engaging thefilter media 1030 and asecond leg 1084 extending perpendicularly from the first leg and offset from thedownstream face 1034 of thefilter media 1030. To mechanically attach theseal element 1070 and theend cap 1080, the end cap includes at least onehollow knob 1086 that can receive aplug 1088 projecting from thebottom surface 1078 of the seal element. - To support the
seal element 1070 against thefilter housing 1010, a separate ring-like support member 1000 extends about theaxis line 1002 and runs along theinner surface 1074 of the seal element. Thesupport member 1000 includes atubular portion 1092 which is parallel to theaxis line 1002 and aconical portion 1094 that projects radially inward from the tubular portion. It will be appreciated that theconical portion 1094 facilitates assembling theseal element 1070 andsupport member 1000 by enabling axially inserting the support member into the annular seal element. Preferably, in the illustrated embodiment, theseal element 1070 includes abackdraft 1096 proximate thetop surface 1076 that extends partly over thetubular portion 1092 when the support member is correctly inserted. To strengthen thesupport member 1000, a strengtheningrib 1004 can extend from theconical portion 1094 across the ring-like support member. As described above, when thesupport member 1000 is circular, the strengtheningrib 1004 can extend as a diameter or a chord, and that multiple strengthening ribs can be provided in a side-by-side arrangement. - Referring to
FIG. 13 , there is illustrated another embodiment in which thestrengthening rib 1104 of thesupport member 1100 can engage thegrill plate 1190. In addition to thesupport member 1100 and thegrill plate 1190, the embodiment ofFIG. 11 includes the ring-like seal element 1170 that extends about theaxis line 1102. Theseal element 1170 includes a radially outward directed sealingsurface 1172, a spaced-apart, radially inward directedinner surface 1174, and generally parallel, spaced-apart top andbottom surfaces seal element 1170 to the rest of thefilter element 1112, the filter element also includes anend cap 1180 that engages thefilter media 1130. Theend cap 1180 has first, skirt-like leg 1182 that is arranged parallel to theaxis line 1102 which engages thefilter media 1130 and asecond leg 1184 extending perpendicularly from the first leg radially toward the axis line and offset from thedownstream face 1134. To mechanically attach theseal element 1170 and theend cap 1180, ahollow knob 1192 is formed into thesecond leg 1184 that can receive aplug 1194 projecting frombottom surface 1178. - The ring-
like support member 1100 extends about theaxis line 1102 and adjacently abuts against theinner surface 1174 of theseal element 1170 to support the seal element against thefilter housing 1110. The strengtheningrib 1104 is integral with and extends from thesupport member 1100 generally adjacent to thedownstream face 1134 of thefilter media 1130. Also located adjacent thedownstream face 1134 is thegrill plate 1190, which can be formed integrally with theend cap 1180 or formed separately. To engage thesupport member 1100 andgrill plate 1190,posts 1106 extend from the strengtheningrib 1104 parallel to thedownstream face 1134 that can be received between pairs offingers 1108 that project from the grill plate. Theposts 1106 can be received between thefingers 1108 in a snap-fit manner so that thegrill plate 1190 holds thesupport member 1100 in place. - Referring to
FIG. 14 , there is illustrated another embodiment in which thegrill plate 1290 can be formed integrally with one ormore strengthening ribs 1204 of thesupport member 1200. The ring-like support member 1200 extends about theaxis line 1202 and includes an axially parallelstraight portion 1206 and a radially outward projecting steppedportion 1208. The strengtheningribs 1204 extend generally from thestraight portion 1206 across the ring-like support member 1200. Thegrill plate 1290 can be suspended betweenmultiple ribs 1204 that are aligned side-by-side across thedownstream face 1234 of thefilter media 1230. Theribs 1204 andgrill plate 1290 can be adjacent to thedownstream face 1234 or, as illustrated, can be spaced-apart by a slight gap indicated byarrows 1292. In addition to theintegral grill plate 1290 andsupport member 1200, the embodiment ofFIG. 12 includes a ring-like seal element 1270 that extends about theaxis line 1202. Theseal element 1270 is formed about thestraight portion 1206 of thesupport member 1200 so that the support member is located between the radially outward directed sealingsurface 1272 and the radially inward directedinner surface 1274 and thus supports the seal element against thefilter housing 1210. - To connect the
seal element 1270,separate support member 1200, andgrill plate 1290 to the rest of thefilter element 1212, the filter element includes anend cap 1280. Theillustrated end cap 1280 includes a skirt-likefirst leg 1282 that extends about thesidewall 1238 of thefilter media 1230 and beyond thedownstream face 1234. Formed at the end of thefirst leg 1282 is a radially inward directedflange 1284 that extends beyond and overlaps a radially outward directedstep 1298 projecting from the steppedportion 1208 of thesupport member 1200. By receiving thestep 1298 between the overlappingflange 1284 anddownstream face 1234 of thefilter media 1230, thesupport member 1200, theseal element 1270, the strengtheningrib 1204, and thegrill plate 1290 are secured to the rest of thefilter element 1212. A compressible,annular gasket 1288 is located between theflange 1284 and thestep 1298 to allow for limited sliding movement in the axial direction between theend cap 1280 andsupport member 1200. - Referring to
FIG. 15 , there is illustrated another embodiment of afilter assembly 1300 in which, in another aspect of the invention, thecompressible seal element 1370 is connected to the rest of thefilter element 1312 by being formed directly onto a portion of therigid end cap 1380. The ring-like seal element 1370 extends about theaxis line 1302 and includes a radially outward directed sealingsurface 1372, a spaced-apart, radially inward directed inner surface 1374, and generally parallel, spaced-apart top andbottom surfaces like end cap 1380 also extends about theaxis line 1302 and includes a skirt-likefirst leg 1382 that engages the corner-like rim 1388 of the filter media 1330. Theend cap 1380 also includes asecond leg 1384 that extends beyond the downstream face 1334 of the filter media 1330. The cross-section of thesecond leg 1384, however, is formed with a wave-like shape that gradually curves radially inward as the second leg extends in the axial direction. Hence, at least substantial portions of thesecond leg 1380 are not parallel with theaxis line 1302. As will be appreciated, in those embodiments in which the filter components are circular, thesecond leg 1384 will produce an annular shell of varying diameters as the second leg extends in the axial direction. - To attach the
seal element 1370 to thesecond leg 1384, the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealingsurface 1372 and the radially inward directed inner surface 1374. Theseal element 1370 is therefore positioned against the steppedsurface 1360 of thefilter housing 1310. Because of the wave-like shape of thesecond leg 1384, the moldedseal element 1370 is sufficiently restrained against detaching from theend cap 1380. To improve the strength of theend cap 1380, a strengtheningrib 1304 can be included that extends across thesecond leg 1384 of the ring-like end cap. Preferably, the embodiment illustrated inFIG. 15 does not include a separate support member for supporting the seal element. However, it should be recognized that in different embodiments a separate support member be can utilized as described above. - Referring to
FIG. 16 , there is illustrated another embodiment in which thecompressible seal element 1470 is connected to the rest of thefilter element 1412 by being formed directly onto a portion of therigid end cap 1480. The ring-like seal element 1470 extends about theaxis line 1402 and includes a radially outward directed sealingsurface 1472, a spaced-apart, radially inward directedinner surface 1474, and generally parallel, spaced-apart top andbottom surfaces like end cap 1480 also extends about theaxis line 1402 and includes a skirt-likefirst leg 1482 that engages the corner-like rim 1488 of thefilter media 1430 and asecond leg 1484 to which theseal element 1470 is attached. Athird leg 1486 interconnects the first andsecond legs - The
second leg 1484 is generally curved so that it arcs away from theaxis line 1402 and, hence, at least substantial portions of the second leg are not parallel with the axis line. Accordingly, where the components of the filter assembly are generally circular, thesecond leg 1484 provides a generally hyperbolic-shaped shell about theaxis line 1402. To attach theseal element 1470 to thesecond leg 1484, the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealingsurface 1472 and the radially inward directedinner surface 1474. Because of the hyperbolic shape of thesecond leg 1484, the moldedseal element 1470 is sufficiently restrained against detaching from theend cap 1480. Additionally, while the embodiment illustrated inFIG. 16 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - Referring to
FIG. 17 , there is illustrated another embodiment in which thecompressible seal element 1570 is connected to the rest of thefilter element 1512 by being formed directly onto a portion of therigid end cap 1580. The ring-like seal element 1570 extends about theaxis line 1502 and includes a radially outward directed sealingsurface 1572, a spaced-apart, radially inward directedinner surface 1574, and generally parallel, spaced-apart top andbottom surfaces like end cap 1580 also extends about theaxis line 1502 and includes a skirt-likefirst leg 1582 that engages the corner-like rim 1588 of thefilter media 1530 and asecond leg 1584 to which theseal element 1570 is attached. Athird leg 1586 interconnects the first andsecond legs - Unlike the first and
third legs second leg 1584 is formed with anenlarged lobe portion 1590. Hence, a least a substantial portion of thesecond leg 1584 is not parallel with theaxis line 1502. Thelobe portion 1590 substantially enlarges theend cap 1580 and provides an object around which the seal material can be molded. Accordingly, with theseal element 1570 attached to theend cap 1580, thelobe portion 1590 is generally located between the radially outward directed sealingsurface 1572 and the radially inward directedinner surface 1574. Because of theenlarged lobe portion 1590, the moldedseal element 1570 is sufficiently restrained against detaching from theend cap 1580. Additionally, while the embodiment illustrated inFIG. 17 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - Referring to
FIG. 18 , there is illustrated another embodiment in which thecompressible seal element 1670 is connected to the rest of thefilter element 1612 by being formed directly onto a portion of therigid end cap 1680. The ring-like seal element 1670 extends about theaxis line 1602 and includes a radially outward directed sealingsurface 1672, a spaced-apart, radially inward directedinner surface 1674, and generally parallel, spaced-apart top andbottom surfaces like end cap 1680 also extends about theaxis line 1602 and includes a skirt-likefirst leg 1682 that engages the corner-like rim 1688 of thefilter media 1630 and asecond leg 1684 to which theseal element 1670 is attached. Athird leg 1686 interconnects the first andsecond legs - The
second leg 1684, which also extends about theaxis line 1602, is considerably thicker where it joins thethird leg 1686 but tapers in the axially direction to athinner tip portion 1690. Hence, at least a substantial portion of thesecond leg 1684 is not parallel to theaxis line 1602. Preferably, thethird leg 1686 tapers generally at an angle of about 5 degrees from theaxis line 1602. Furthermore, at least one surface of thesecond leg 1684 can be serrated or grooved to provide a plurality ofnotches 1692. To attach theseal element 1670 to thesecond leg 1684, the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealingsurface 1672 and the radially inward directedinner surface 1674. Because of thenotches 1692 provided in thesecond leg 1684, the moldedseal element 1670 is sufficiently restrained against detaching from theend cap 1680. Additionally, while the embodiment illustrated inFIG. 18 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - Referring to
FIG. 19 , there is illustrated another embodiment in which thecompressible seal element 1770 is connected to the rest of thefilter element 1712 by being formed directly onto a portion of therigid end cap 1780. The ring-like seal element 1770 extends about theaxis line 1702 and includes a radially outward directed sealingsurface 1772, a spaced-apart, radially inward directedinner surface 1774, and generally parallel, spaced-apart top andbottom surfaces like end cap 1780 also extends about theaxis line 1702 and includes a skirt-likefirst leg 1782 that engages the corner-like rim 1788 of thefilter media 1730 and asecond leg 1784 to which theseal element 1770 is attached. Athird leg 1786 interconnects the first andsecond legs - The
second leg 1784 extends from thethird leg 1786 at a radially inward angle with respect to theaxis line 1702 such that the second leg is not parallel with the axis line. Preferably, the angle, designated as 1790 inFIG. 19 , is approximately 10 degrees. Accordingly, in the embodiments where the filter assembly components are circular, it will be appreciated that thesecond leg 1784 generally forms a cone as it extends about theaxis line 1702. To attach theseal element 1770 to thesecond leg 1784, the seal material is molded about the second leg such that the second leg is located between the radially outward directed sealingsurface 1772 and the radially inward directedinner surface 1774. Because of theangle 1790 with which thesecond leg 1784 is oriented with respect to theaxis line 1702, the moldedseal element 1770 is sufficiently restrained against detaching from theend cap 1780. Additionally, while the embodiment illustrated inFIG. 19 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - Referring to
FIG. 20 , there is illustrated another embodiment in which thecompressible seal element 1870 is connected to the rest of thefilter element 1812 by being formed directly onto a portion of therigid end cap 1880. The ring-like seal element 1870 extends about theaxis line 1802 and includes a radially outward directed sealingsurface 1872, a spaced-apart, radially inward directedinner surface 1874, and generally parallel, spaced-apart top andbottom surfaces like end cap 1880 also extends about theaxis line 1802 and includes a skirt-likefirst leg 1882 that engages the corner-like rim 1888 of thefilter media 1830 and asecond leg 1884 to which theseal element 1870 is attached. Athird leg 1886 interconnects the first andsecond legs - The
second leg 1884 extends from thethird leg 1886 at a radially outward angle with respect to theaxis line 1802 such that the second leg is not parallel with the axis line. Preferably, the angle, designated by 1890 inFIG. 20 , is approximately 5 degrees. Additionally, thesecond leg 1884 has formed at its distal tip a radially outward directedflange 1892. Accordingly, in the embodiments where the filter assembly components are circular, it will be appreciated that, as theend cap 1880 extends about theaxis line 1802, theflange 1892 forms a flat annular surface extending from the shell defined by thesecond leg 1884. To attach theseal element 1870 to thesecond leg 1884, the seal material is molded about the second leg and theflange 1892 such that the second leg is located between the radially outward directed sealingsurface 1872 and the radially inward directedinner surface 1874. Furthermore, there can be disposed through the flange 1892 a plurality of axially orientedholes 1894 that can receive seal material during molding. Because of theflange 1892 and sealmaterial receiving holes 1894, the moldedseal element 1870 is sufficiently restrained against detaching from theend cap 1880. Additionally, while the embodiment illustrated inFIG. 20 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - Referring to
FIG. 21 , there is illustrated another embodiment in which thecompressible seal element 1970 is formed onto therigid end cap 1980 which in turn is taped to the rest of thefilter element 1912. The ring-like seal element 1970 extends about theaxis line 1902 and includes a radially outward directed sealingsurface 1972, a spaced-apart, radially inward directedinner surface 1974, and generally parallel, spaced-apart top andbottom surfaces end cap 1980, which also extends about theaxis line 1902 in a ring-like fashion, includes afirst leg 1982 and asecond leg 1984 joined together at an angle. Accordingly in those embodiments wherein the filter elements are circular, theend cap 1980 forms a shell appearing as two abutting cones of differing angles extending about theaxis line 1902. - The
end cap 1980 is oriented such that thefirst leg 1982 abuts against thedownstream face 1934 of thefilter media 1930 and thesecond leg 1984 is axially directed toward the outlet of thefilter housing 1910. Preferably, thesecond leg 1984 is oriented to form anangle 1990 with respect to theaxis line 1902 of approximately 10 degrees. To attach theend cap 1980 to the rest of thefilter element 1912, a length oftape 1990 is fastened about thefirst leg 1982 and thesidewall 1938 of thefilter media 1930. - Referring to
FIG. 22 , there is illustrated another embodiment in which thecompressible seal element 2070 is formed onto arigid end cap 2080 that in turn is attached to the rest of thefilter assembly 2012. The ring-like seal element 2070 extends about theaxis line 2002 and includes a radially outward directed sealingsurface 2072, a spaced-apart, radially inward directedinner surface 2074, and generally parallel, spaced-apart top andbottom surfaces like end cap 2080 also extends about theaxis line 2002 and includes a skirt-likefirst leg 2082 that engages the corner-like rim 2088 of thefilter media 2030 and asecond leg 2084 to which theseal element 2070 is attached. Athird leg 2086 interconnects the first andsecond legs second leg 2084, in turn, extends from thethird leg 2086 at a radially outward directed angle such that the second and third legs diverge from their common joining point. Preferably, thesecond leg 2084 extends so as to form anangle 2090 of approximately 60 degrees with respect to theaxis line 2002. Accordingly, where the components of the filter element are circular, the second andthird legs end cap 2080 extends about theaxis line 2002. - To attach the
seal element 2070 to thesecond leg 2084, the seal material is molded about the second leg such that the second leg extends into theinner surface 2074 and partway across the seal element to theouter sealing surface 2072. Some of the seal material proximate thebottom surface 2078 can collect between the angularly interconnected second andthird legs second leg 2084 is anaxially extending flange 2092 while formed into the second leg are a plurality of axially alignedholes 2094. It will be appreciated that theflange 2092 can have the same material thickness as thesecond leg 2084, a reduced thickness, or an increased thickness. Because of theflange 2092 and sealmaterial receiving holes 2094, the moldedseal element 2070 is sufficiently restrained against detaching from theend cap 2080. Additionally, while the embodiment illustrated inFIG. 22 preferably does not include a separate support member for supporting the seal element against the filter housing, it should be appreciated that in other embodiments, such a support member can be included. - In accordance with another aspect of the invention, the seal element can be supported against the housing by a plurality of posts. Referring to
FIG. 23 , there is illustrated another embodiment wherein theseal element 2170 is connected to the rest of thefilter element 2112 by arigid end cap 2180 formed with a plurality ofposts 2182. As described above, the ring-like seal element 2170 extends about theaxis line 2102 and has a generally rectangular cross-section including a outward directedsealing surface 2172, a spaced-apart, radially inward directedinner surface 2174, and generally parallel, spaced-apart top andbottom surfaces like end cap 2180 also extends about theaxis line 2102 and includes a skirt-likefirst leg 2184 that engages the corner likerim 2188 of thefilter media 2130. Extending radially inward from thefirst leg 2184 is asecond leg 2186 that is spaced apart from and generally parallel to thedownstream face 2134 of thefilter media 2130. To support thesecond leg 2186 in its spaced-apart relationship with thedownstream face 2134, theend cap 2180 also includes one ormore support studs 2190 that depend from the second leg to abut against thefilter media 2130. - To attach the
seal element 2170 to theend cap 2180 with the plurality ofposts 2182, the posts extend perpendicularly from thesecond leg 2186 in the direction away from thefilter media 2130. Theposts 2182 are formed about the ring-like end cap 2180 to encircle theaxis line 2102 and can be spaced-apart from each other at any suitable distance including, for example, every 2 to 3 inches. Theseal element 2170 can be formed about theposts 2182 so that the posts are sandwiched between the radially outward directed sealingsurface 2172 and the radially inward directedinner surface 2174. Furthermore, thebottom surface 2178 abuts against thesecond leg 2186 so that theseal element 2170 is axially offset from thedownstream face 2134. In addition to connecting theseal element 2170 to the rest of thefilter element 2112, theposts 2182 help support the seal element against the steppedsurface 2160 of thefilter housing 2110. - In the illustrated embodiment, to assist in supporting the
seal element 2170, thefilter element 2112 can include a separately formed, ring-like support member 2100 that extends about and abuts against theinner surface 2174. - Also illustrated in
FIG. 23 is a secondary orsafety filter element 2192 located downstream of thefluted filter element 2112. Thesafety filter element 2192 is provided in case thefluted filter element 2112 fails or becomes displaced. Thesafety filter element 2192 includes arigid support frame 2194 with a dependinghandle 2196 and aseal 2198 that engages thefilter housing 2110. - Referring to
FIG. 24 , there is illustrated another embodiment wherein theseal element 2270 is connected to the rest of thefilter element 2212 by anend cap 2280 having a plurality ofposts 2282. Theseal element 2270 andend cap 2280 are similar in design to the embodiment illustrated inFIG. 23 including the plurality ofposts 2282 sandwiched between a radially outward directed sealingsurface 2272 and a radially inward directed inner surface 2276 of the seal element. In the illustrated embodiment, however, theposts 2282 are formed about theaxis line 2202 at a closer distance to each other, such as, for example, 0.5 inches apart. Because of the reduced distance betweenposts 2282, it will be appreciated that theend cap 2280 will include a greater number of posts. Because the greater number ofposts 2282 provides adequate support for theseal element 2270, a separate support member is unnecessary in the present embodiment. - Referring to
FIG. 25 , there is illustrated another embodiment where theseal element 2370 is connected to the rest of thefilter element 2312 by anend cap 2380 having a plurality ofposts 2382. The ring-like seal element 2370 extends about theaxis line 2302 and includes a radially outward directed sealingsurface 2372, a spaced-apart, radially inward directedinner surface 2374, and generally parallel, spaced-apart top andbottom surfaces like end cap 2380 also extends about theaxis line 2302 and includes a skirt-likefirst leg 2384 that engages the corner-like rim 2388 of thefilter media 2330 and asecond leg 2386 that extends parallel to and spaced-apart from thedownstream face 2334 of thefilter media 2330. Theposts 2382 extend from thesecond leg 2386 in a direction away from thefilter media 2330 and are sandwiched between the radially outward directed sealingsurface 2372 and the radially inward directedinner surface 2374 of theseal element 2370. Theposts 2382 can be spaced-apart from each other at any suitable distance such as, for example, every 2 to 3 inches. - To assist the
posts 2382 in supporting theseal element 2370 against the steppedsurface 2360 of thefilter housing 2310, thefilter element 2312 includes aseparate support member 2300. Thesupport member 2300 has anannular base portion 2392 that is arranged parallel to and spaced-apart from thedownstream face 2334 of the filter media. To space thebase portion 2392 from thedownstream face 2334, one ormore support studs 2394 depend from the base portion to abut against thefilter media 2330. To secure thesupport member 2300 in place with respect to thefilter media 2330, thesecond leg 2386 of theend cap 2380 can engage thebase portion 2392. Thesupport member 2300 also includes a ring-like support flange 2398 that extends from thebase portion 2394 adjacent to theinner surface 2374, thereby supporting theseal element 2370 against thefilter housing 2310. - Referring to
FIG. 26 , there is illustrated another embodiment wherein theseal element 2470 is connected to the rest of thefilter element 2412 by anend cap 2480 formed with a plurality ofposts 2482. The ring-like seal element 2470 extends about theaxis line 2402 and includes a radially outward directed sealingsurface 2472, a spaced-apart, radially inward directed inner surface 2474, and generally parallel, spaced-apart top andbottom surfaces like end cap 2480 also extends about theaxis line 2402 and includes a skirt-likefirst leg 2484 that engages the corner-like rim 2488 of thefilter media 2430. Asecond leg 2486 extends from thefirst leg 2484 and is spaced-apart from thedownstream surface 2434 of thefilter media 2430 by one ormore support studs 2490. Rather than extending completely parallel to thedownstream face 2434, thesecond leg 2486 includes a raisedshoulder 2488 that depends away from thefilter media 2430 proximate thesupport stud 2490. The raisedshoulder portion 2488 can provide theend cap 2480 with structural rigidity. - The
posts 2482 extend perpendicularly from thesecond leg 2486 to encircle theaxis line 2402. Theposts 2482 can be spaced-apart from each other at any suitable distance such as, for example, every 0.25 inches. In the illustrated embodiment, theposts 2482 extend adjacent to and abut against the inner surface 2474 of theseal element 2470 to support the seal element against thefilter housing 2410. To mechanically attach theseal element 2470 to theend cap 2480, there is disposed through thesecond leg 2486 radially outward of the posts 2482 a plurality ofapertures 2492. A flaredhead portion 2494 protrudes from thebottom surface 2478 of theseal element 2470 through each of theapertures 2492 to clamp the seal element to thesecond leg 2486. - Referring to
FIG. 27 , there is illustrated another embodiment wherein theseal element 2570 is connected to the rest of thefilter element 2512 by anend cap 2580 formed with a plurality ofposts 2582. Thefilter element 2512 is similar in design to the embodiment illustrated inFIG. 26 and includes a ring-like end cap 2580 having afirst leg 2584 engaging a corner-like rim 2588 of the filter media 2530 and asecond leg 2586 spaced-apart from thedownstream face 2534 by a support stud 2590. Instead of being arranged parallel to thedownstream face 2534, thesecond leg 2586 includes a slantedportion 2592 that depends from thefirst leg 2584 toward the filter media 2530 and a raisedshoulder portion 2594 proximate to the support stud 2590. The slantedportion 2592 and the raisedshoulder portion 2594 provide the second leg with structural rigidity. - In another aspect of the invention, the seal element can be received in a slotted member for connecting the seal element to the rest of the filter element. For example, referring to
FIG. 28 , the ring-like seal element 2670 extends about theaxis line 2602 and has a radially outward directed sealingsurface 2672, a radially inward directed inner surface 2674, and generally parallel, spaced-apart top andbottom surfaces filter element 2612 also includes a ring-like end cap 2680 that engages a corner-like rim 2688 of thefilter media 2630. Theend cap 2680 includes agrill plate 2682 that extends across thedownstream face 2634 to assist in preventing displacement of thefilter media 2630. - In the embodiment illustrated in
FIG. 28 , the slottedmember 2690 is formed as an integral part of theend cap 2680 and extends in a skirt-like fashion adjacent to thesidewall 2638 of thefilter media 2630 about theaxis line 2602. The slottedmember 2690 defines a radially outward directedslot 2692 that can retentively receive theseal element 2670. Because the slottedmember 2690 extends adjacent to thesidewall 2638 of thefilter media 2630, both the slotted member and theseal element 2670 are situated away from thedownstream face 2634 and toward the inlet of thefilter housing 2610. Hence when thefilter element 2612 is inserted into thefilter housing 2610, theseal element 2670 is supported against the filter housing upstream of the steppedsurface 2660. - Referring to
FIG. 29 , in another embodiment, theseal element 2770 can be received in a slottedmember 2790 that is separate from theend cap 2780. The ring-like end cap 2780 engages a corner-like rim 2788 of thefilter media 2730 and includes agrill plate 2782 that extends adjacent to thedownstream face 2734 to assist in preventing displacement of the filter media. The slottedmember 2790 is formed as an annular band that extends adjacently about thesidewall 2738 of thefilter media 2730 and defines a radially outward directedslot 2792 that can receive theseal element 2770. Furthermore, the slottedmember 2790 is spaced away from thedownstream face 2734 and theend cap 2780 and toward the inlet of thefilter housing 2710. Hence, when thefilter element 2712 is inserted into thefilter housing 2710, theseal element 2770 is supported against the filter housing upstream of the steppedsurface 2760. - Referring to
FIG. 30 , there is illustrated an embodiment of afilter element 2812 in which the slottedmember 2890 for connecting theseal element 2870 to the rest of the filter element is formed integrally with thegrill plate 2894 but separately from theend cap 2880. The ring-like seal element 2870 has a radially outward directed sealingsurface 2872, a radially inward directed inner surface 2874, and generally parallel, spaced-apart top andbottom surfaces 2876, 2878. Thegrill plate 2894 extends across thedownstream face 2834 of thefilter media 2830 and is spaced-apart therefrom by one ormore support studs 2896. To secure thegrill plate 2894 to thefilter media 2830, the ring-like end cap 2880 includes a skirt-like first leg 2882 that engages a corner-like rim 2888 of the filter media and a radially inward projectinghook 2884 that engages the grill plate. - The slotted
member 2890 is integral with and extends from thegrill plate 2894 in the direction away from thedownstream face 2834. Additionally, the slottedmember 2890 extends as an annular band about theaxis line 2802 and defines a radially outward directedslot 2892 that can receive theseal element 2870. Hence, theseal element 2870 is spaced-apart from thedownstream face 2834 and, when thefilter element 2812 is inserted into thefilter housing 2810, is supported against the stepped surface 2860. - Referring to
FIG. 31 , there is illustrated another embodiment in which theseal element 2970 is attached directly to thefilter media 2930. The ring-like seal element 2970 extends about theaxis line 2902 and has a radially outward directed sealingsurface 2972, a radially inward directedinner surface 2974, and generally parallel, spaced-apart top andbottom surfaces seal element 2970 also includes aleg portion 2979 that extends from thebottom surface 2978 past thedownstream face 2934 towards the upstream face and adjacently along thesidewall 2938 of thefilter media 2930 and can be attached thereto by, for example, adhesive. The rest of theseal element 2970 including thetop surface 2976 extends beyond thedownstream face 2934 of thefilter media 2930 so that the seal element can engage the steppedsurface 2960 of thefilter housing 2910. - To support the
seal element 2970 against thefilter housing 2910, the seal element can be attached to a portion of therigid grill plate 2990. As illustrated, thegrill plate 2990 extends across thedownstream face 2934 to prevent thefilter media 2930 from becoming displaced during use. Thegrill plate 2990 includes anannular flange 2992 extending away from thedownstream face 2934. Theseal element 2970 can be formed or molded about theflange 2992. Since theseal element 2970 is attached to thefilter media 2930, the seal element additionally functions to secure thegrill plate 2990 to the rest of thefilter element 2912. - Referring to
FIG. 32 , there is illustrated another embodiment in which theseal element 3070 and grill plate 3090 are connected to thesidewall 3038 of thefilter media 3030. The ring-like seal element 3070 includes a radially outward directed sealingsurface 3072, a radially inward directedinner surface 3074, and spaced-apart top andbottom surfaces leg portion 3079 extends in the upstream direction from thebottom surface 3078 generally along thesidewall 3038. Hence, the sealingsurface 3072 and thetop surface 3076 are located beyond thedownstream face 3034 where they can engage the steppedsurface 3060 of thefilter housing 3010. To support theseal element 3070 against the filter housing, asupport member 3000 in the form of an annular band can extend adjacently along theinner surface 3074 of the seal element. - The grill plate 3090 that extends across the
downstream face 3034 to prevent thefilter media 3030 from becoming displaced during use. Extending from the periphery of the grill plate 3090 past thedownstream face 3034 and generally along the sidewall of thefilter media 3030 is a second leg portion 3092. In the illustrated embodiment, the second leg portion 3092 extends between thesidewall 3038 and thefirst leg portion 3079 from theseal element 3070. The first andsecond leg portions 3079, 3092 can be adhesively attached to thefilter media 3030. - Referring to
FIG. 33 , there is illustrated another embodiment in which theseal element 3170 is located proximate theupstream face 3132 of thefilter media 3130. The ring-like seal element 3170 includes a radially outward directed sealingsurface 3172, a radially inward directedinner surface 3174, and spaced-apart top andbottom surfaces seal element 3170 is located at theupstream face 3132, the seal element engages and seals against a portion of thehousing 3110 near theinlet 3116. Thefilter housing 3110 can be formed with a counter-bore 3120 near theinlet 3116 into which theseal element 3170 can be situated. To support theseal element 3170, thefilter element 3112 includes a bracket 3192 that can be connected to theupstream face 3132 of thefilter media 3130. The bracket 3192 defines anannular groove 3194 that extends about thesidewall 3138 of thefilter media 3130 and which can receive and maintain in position theseal element 3170. To prevent thefilter media 3130 from being displaced through theoutlet 3118 of thefilter housing 3110 during use, an integral end cap 3180 andgrill plate 3190 can be provided at the downstream face 3134 engaging a corner-like rim 3188 of thefilter media 3130. -
FIGS. 1A and 2A show a first exemplary embodiment of the invention in the form of afilter element 100A, adapted for insertion into a filter housing, but not including the filter housing, for removing particulate matter from a flow of fluid passing through the filter housing. The term fluid as used herein is intended to include fluids in either liquid or gaseous forms. The exemplary embodiments shown herein specifically illustrate an air filter of the type used for filtering intake air for engines and air compressors. - The
filter element 100A includes afilter pack 102A, aseal member 104A, and aseal support frame 106A operatively connecting theseal member 104A to thefilter pack 102A. Thefilter pack 102A includes first and second oppositely facing flow faces 108A, 110A, and defines alongitudinal axis 112A passing through the first and second flow faces 108A, 110A. Theseal support frame 106A including a cantedannular extension 114A thereof, projecting from thefirst flow face 108A at an oblique angle to thelongitudinal axis 112A, for supporting theseal member 104A. - The term “oblique,” is used herein in accordance with the common dictionary meaning of that word to indicate that the canted
annular extension 114A extends at an angle, with respect to thelongitudinal axis 112A, which is neither parallel nor perpendicular to thelongitudinal axis 112A. The term “annular,” is also used herein, according to its common dictionary definition, to describe a variety of ring-like shapes disposed about an axis or centerline. Annular shapes, as contemplated by the inventors, may include, but are not limited to, shapes that are round, rectangular, oval, or race-track-like with two generally straight and parallel sides joined by rounded ends. - In the
filter element 100A of the first exemplary embodiment, the canted annular extension includes afirst end 116A and adistal end 118A thereof, with thefirst end 116A of the cantedannular extension 114A being disposed nearer than thedistal end 118A thereof to both thelongitudinal axis 112A and thefirst flow face 108A of thefilter pack 102A, such that the cantedannular extension 114A is canted outward from thelongitudinal axis 112A. - The canted
annular extension 114A includes a plurality ofholes 120A extending therethrough, as best seen inFIG. 3A , with theseal member 104A including a portion thereof extending through theholes 120A in the cantedannular extension 114A, as shown inFIG. 4A , to help retain theseal member 104A on the cantedannular extension 114A. Theseal support frame 106A of thefilter element 100A also includes an inwardly canted intermediateannular segment 122A extending between thefirst end 116A of the cantedannular extension 114A and thefirst flow face 108A of thefilter pack 102A, to thereby form a V-shaped, outwardly opening,annular groove 124A at the juncture of the cantedannular extension 106A and the inwardly canted intermediateannular segment 122A, for receipt therein of aportion 126A of theseal member 104A. - As shown in
FIG. 5A , theseal member 104A in thefilter element 100A is preferably formed from a material such as urethane foam, molded onto the cantedannular extension 114A using amold 128A. During molding of theseal member 104A, the filter element is placed into themold 128A with the cantedannular extension 114A facing downward, as shown inFIG. 5A . A material used for forming theseal member 114A is placed in themold 128A and allowed to foam and rise up around the cantedannular extension 114A, and through theholes 120A into the V-shapedgroove 124A of theseal support frame 106A. The cantedannular extension 114A defines aninner surface 130A thereof, having a raisedannular rib 132A extending therefrom for contacting and sealing against themold 128A, to thereby limit the extent of theseal member 104A along theinner surface 130A of the cantedannular extension 114A. - As shown in
FIGS. 1A and 2A , thefilter pack 102A defines anouter periphery 134A thereof, and the seal support frame includes an outerperipheral sidewall 136A thereof adapted for circumscribing theouter periphery 134A of thefilter pack 102A. Theseal support frame 106A includes afirst end 138A thereof including the cantedannular extension 114A, and asecond end 140A thereof, spaced from the first end thereof along thelongitudinal axis 112A. Each of the first and second ends 138A, 140A of theseal support frame 106A include a skirt section thereof, which are joined together to form the outerperipheral sidewall 136A of theseal support frame 106A, and to define a cavity 141 within theseal support frame 106A for receiving thefilter pack 102A. The first and second ends 138A, 140A of the seal support frame are further configured such that, when the first and second ends 138A, 140A of theseal support frame 106A are joined to one another, thefilter pack 102A is retained within thecavity 141A of theseal support frame 106A. - In the exemplary embodiment of the
filter element 100A, the first and second ends 138A, 140A of theseal support frame 106A are joined to one another and sealed to theouter periphery 134A of thefilter pack 106A by a single annular bead of adhesive 142A, as best seen inFIGS. 6A and 7A . The single annular bead of adhesive 142A performs the dual functions of simultaneously joining the first and second ends 138A, 140A of theseal support frame 106A to theouter periphery 134A of thefilter pack 106A, and providing a seal blocking fluid flow between theouter periphery 134A of thefilter pack 102A and an inner surface of the peripheralannular sidewall 136A. In other embodiments of the invention, more than one bead of sealant may be used, or one or more non-continuous beads of sealant may be used. It is contemplated, however, that use of a single annular bead of adhesive 142A will generally be preferred, because the single annular bead 142A performing multiple functions will typically facilitate manufacture and reduce costs, in most embodiments of the invention. - By virtue of the construction of the
seal support frame 106A of thefilter 100A, the outerperipheral sidewall 136A includes afirst section 144A thereof extending from thefirst end 138A of theseal support frame 106A, and terminating in adistal end 146A of thefirst section 144A of the outerperipheral sidewall 136A. The outerperipheral sidewall 136A also includes asecond section 148A thereof, that extends from thesecond end 140A of theseal support frame 106A and terminates in adistal end 150A of thesecond section 148A of the outerperipheral sidewall 106A. - The first and
second sections peripheral sidewall 136A are joined together with a joint formed by ahub 152A integrally formed with and extending from thedistal end 146A of thefirst section 144A of the outerperipheral sidewall 136A, with thehub 152A being adapted for receiving thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A. Thehub 152A is configured such that aninner surface 154A of thehub 152A, is spaced from thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A to form a gap for receiving a portion of the bead of adhesive 142A. - As shown by
FIGS. 6A-8A , in theseal support frame 106A of the exemplary embodiment of thefilter element 100A, thesecond section 148A of the outerperipheral sidewall 136A includes a plurality of raisedribs 156A that extend outward from thesecond section 148A of the outerperipheral sidewall 136A, adjacent thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A, for spacing theinner surface 154A of thehub 152A from thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A of theseal support frame 106A. Theribs 156A ensure that a gap of a predetermined size will be maintained between theinner surface 154A of thehub 152A and thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A to allow a portion of the bead of adhesive 142A to remain in the gap when the first and second ends 138A, 140A of theseal support frame 106A are joined to one another and to theouter periphery 134A of thefilter pack 102A. - In the exemplary embodiment of the
filter element 100A, theribs 156A also perform a second function, by being sized to provide a press fit of thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A into thehub 152A. The press fit allows theseal support frame 106A to be self-fixturing, to that once the first and second ends 138A, 140A of theseal support frame 106A are pressed together to a desired height, the press fit will hold the first and second ends 138A, 140A together at the desired height while the adhesive 142A is curing. This allows thefilter element 100A to be removed from any press equipment used for assembly, and set aside for curing of the adhesive, thereby freeing up the press equipment for use in assembling anotherfilter element 100A. - The
hub 152A, thedistal end 150A of thesecond section 148A of the outerperipheral side wall 136A, and theouter periphery 134A of thefilter pack 102A are preferably joined to one another, after thefilter pack 102A is inserted into the portion the cavity 141 formed by thefirst end 138A of theseal support frame 106A, by placing a single bead of adhesive 142A, of a judiciously selected size, at the juncture of thedistal end 146A of thefirst section 144A of theperipheral sidewall 136A and thehub 152A and the outer periphery of thefilter pack 102A, prior to inserting thedistal end 150A of thesecond section 148A of theperipheral sidewall 136A into thehub 152A. After placement of the bead of adhesive 142A in thehub 152A, thedistal end 150A of thesecond section 148A of theperipheral sidewall 136A is then inserted into thehub 152A, and pressure is applied to thesecond end 140A of theseal support frame 106A to urge it into contact with thesecond face 110A of thefilter pack 102A, and to push thedistal end 150A of thesecond section 148A into thehub 152A. As thedistal end 150A of the second section of theperipheral sidewall 136A moves into thehub 152A, the adhesive forming the single bead of adhesive 142A is squeezed into gaps between aninner surface 154A of thehub 152A, that is spaced from thedistal end 150A of thesecond section 148A of the outerperipheral sidewall 136A to form a space for receiving an adhesive sealant for joining together the distal ends of the first and second sections of the outer peripheral sidewall. Once thedistal end 150A of thesecond section 148A of theperipheral sidewall 136A has been pressed far enough into thehub 152A to achieve a desired overall height of thefilter element 100A, the press fit features described above allow thefilter element 100A to be self-fixturing while the adhesive 142A is curing. - The components of the
filter element 100A need not, however, be assembled in the same order, or by the method described above, in practicing the invention. It will be understood, by those having skill in the art, that in other embodiments of the invention, other arrangements, sequences, or methods may be used for forming and/or joining together component parts of a seal support frame, according to the invention. In other embodiments of the invention, for example, it may be desirable to have a filter pack captured within a seal support frame, according to the invention, but to not have the outer periphery joined to the seal support frame by an adhesive. It will also be understood that, although the outerperipheral sidewall 136A of theseal support frame 106A of the exemplary embodiment thefilter element 100A is imperforate, in other embodiments of the invention the outer peripheral sidewall may include one or more openings extending therethrough. - As shown in
FIG. 1A , the first and second ends 138A, 140A of theseal support frame 106A of the exemplary embodiment of thefilter element 100A also respectively include a first endflow face screen 137A and a second endflow face screen 139A, that provide protection against physical damage for the first and second flow faces 108A, 110A of thefilter pack 102A. The first and secondflow face screens filter pack 102A that are exerted in a direction parallel to thelongitudinal axis 112A by fluid flowing through thefilter pack 102A. In the exemplary embodiment of thefilter element 100A, the first and second flow face screens 137, 139 are formed integrally with theseal support frame 106A. In other embodiments of the invention, however, such flow face screens may be separate components, attached to or held in place by the seal support frame, or may be eliminated. - Those having skill in the art will recognize that in embodiments of the invention having a canted annular extension, as described above, the canted extension provides a convoluted ring-like structure that is inherently stiff in the radial direction, for resisting compression forces imposed on the seal member when the filter element is inserted into a housing. As a result of this inherent stiffness, it is not necessary, in some embodiments of the invention, for the
flow face screens - The
filter pack 102A of the exemplary embodiment of thefilter element 100A is formed from afilter media 157A, as shown inFIG. 9A , that includes aconvoluted sheet 158A of porous filter material, for removing particulate matter from a fluid that is directed through thefilter element 100A. Theconvoluted sheet 158A may be formed by any appropriate process, such as corrugating or pleating, but preferably by gathering, as described in a United States patent application, entitled “Gathered Filter Media and Method of Making Same,” bearing the attorney docket no. 502854, assigned to the Assignee of the present invention, filed concurrently herewith and incorporated herein by reference. - The
convoluted sheet 158A of porous filter material, of thefilter media 157A, forms a plurality of contiguousadjacent convolutions 160A, commonly known in the industry as flutes. Selected ends of theflutes 160A of thefilter media 157A may be blocked, with a bead of adhesive for example, to cause fluid entering one end of some of theflutes 160A to flow through the porous filter media intoother flutes 160A prior to exiting thefilter media 157A at an opposite end of theflutes 160A, in the manner known in the art. Selected flutes may also include an intermediate seal 161A, as disclosed in a United States patent application, entitled “Fluted Filter Media with Intermediate Flow Restriction and Method of Making Same,” bearing the attorney docket no. 502852, assigned to the Assignee of the present invention, filed concurrently herewith and incorporated herein by reference. - The
fluted filter media 157A of the exemplary embodiment of thefilter element 100A also includes aface sheet 162A attached to theconvoluted sheet 158A, for retaining the convoluted sheet 15 8A of porous filter material in a convoluted state. The term face sheet, as used herein, is intended to encompass any form of sheet or strip of generally flat, porous or non-porous, material attached to theconvoluted sheet 158A of porous filter material. In the exemplary embodiment, it is contemplated that theface sheet 162A would preferably be formed of a porous filter material, in most embodiments of the invention. - As shown in
FIG. 10A , thefilter pack 102A of the exemplary embodiment of thefilter element 100A described above, is formed by coiling thefilter media 157A to form a generally right-circular-cylinder-shaped structure, that is proportioned for insertion into a filter housing having a generally circular cross section. In other embodiments of the invention, however, afilter pack 102A′, and its associated filter element (not shown), may have a non-circular cross section, such as the race-track shaped filter shown inFIG. 11A . Filter packs having other cross sectional shapes, such as square, rectangular, or polygonal, for example, may also be utilized, in other embodiments of the invention, by coiling or bonding together successive layers of a fluted filter media. It is also understood that the invention is not limited to filter packs of fluted filter media. Those having skill in the art will readily recognize that the invention may also be practiced with efficacy, using other types of filter media. -
FIG. 12A shows a second exemplary embodiment of the invention, in the form of afilter apparatus 200A, having afilter housing assembly 202A including afilter housing 204A and a boot 206A, adapted for attachment thereto of afilter element 208A. Thefilter element 208A is of the cartridge type described herein. In contrast to the first exemplary embodiment of the invention, however, in which the filter apparatus included only thefilter element 100A, and not the filter assembly to which thefilter element 100A is adapted to be attached, the second exemplary embodiment of the invention includes both thefilter element 208A and thefilter assembly 202A formed by thehousing 204A and the boot 206A. It should be further noted that thefilter apparatus 200A of the second exemplary embodiment also includes asafety filter 210A, mounted in thefilter housing 204A at a point in the fluid flowpath downstream from thefilter cartridge 208A. Other embodiments of a filter apparatus, according to the invention, may include fewer or more components than thefilter assembly 200A of the second exemplary embodiment. - The
filter element 208A of thefilter apparatus 200A is generally of the type described above in relation to the first exemplary embodiment. Specifically, thefilter element 208A of thefilter apparatus 200A includes a generally right-circular-cylinder shapedfilter pack 212A of fluted filter media, and aseal support frame 214A having an outwardly cantedannular extension 216A supporting aseal member 218A molded to the outwardly cantedextension 216A, in the same manner as described above in relation to thefilter element 100A of the first exemplary embodiment. Theseal support frame 214A of thefilter element 208A of thefilter apparatus 200A of the second exemplary embodiment is also a two part structure including ahub arrangement 220A for joining anupper frame section 222A and alower frame section 224A (as oriented inFIG. 12A ) together and to the outer periphery of the filter pack with a single annular bead of adhesive (not shown) in the same manner as described above in relation to the first exemplary embodiment of the invention. - Those having skill in the art will recognize that, although invention has been described herein with reference to several exemplary embodiments, many other embodiments of the invention are possible. For example, as shown in
FIG. 13A , in other embodiments of invention, afilter element 300A may include anannular extension 302A that is canted inward, rather than being canted outward as shown and described in relation to the first and second exemplary embodiments of the invention described above. Such an inwardly canted annular extension may or may not include through holes for receiving and retaining a portion of aseal member 304A molded, in situ, onto theannular extension 302A. Those having skill in the art will recognize that having theannular extension 302A canted inward results in the distal end of theannular extension 302A having a smaller periphery than the portion of the annular extension adjacent theflow face 306A of thefilter pack 308A. As a result of this construction, insertion and removal of thefilter element 300A is facilitated by having the compressive forces on theseal 304A be generally proportional to the axial engagement length of theseal member 304A with an inside wall of a housing (not shown). - As shown in
FIGS. 2A and 13A , aseal member chamfer filter element - It is also contemplated that an embodiment of the invention including a seal support frame having an outer peripheral sidewall, adapted for circumscribing the outer periphery of the filter pack, a first end thereof including an annular extension, and a second end thereof spaced from the first end thereof along the longitudinal axis, with the first and second ends of the seal support frame joined by the outer peripheral sidewall of the seal support frame to define a cavity within the seal support frame for receiving the filter pack, may include an annular extension which is not canted either inward or outward.
- All references, including publications, patent applications, and patents cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.
- The use of the terms “a” and “an” and “the” and similar referents in the context of describing the invention (especially in the context of the following claims) is to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms “comprising,” “having,” “including,” and “containing” are to be construed as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
- Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.
Claims (19)
1. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(c) grid work extending over at least one of the inlet and outlet flow faces; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures;
(ii) the grid work and the seal support are at opposite ends of the shell.
2. An air filter cartridge according to claim 1 wherein:
(a) the shell comprises a molded plastic material; and
(b) the seal arrangement comprises foamed polyurethane.
3. An air filter cartridge according to claim 1 wherein: (a) the grid work is an integral part of the shell.
4. An air filter cartridge according to claim 1 wherein: (a) the media pack comprises a coiled fluted filter media pack and a core is within the media pack.
5. An air filter cartridge according to claim 1 wherein:
(a) the seal support extends outwardly;
(b) the media pack is racetrack shaped; and
(c) the shell is racetrack shaped.
6. An air filter cartridge according to claim 1 wherein: (a) the seal support is annular with respect to the media pack.
7. An air filter cartridge according to claim 6 wherein: (a) the plurality of seal flow apertures extend along the annular seal support.
8. An air filter cartridge according to claim 1 wherein:
(a) the shell includes a first end having:
(i) a sidewall portion; and
(ii) a transition portion canted relative to the sidewall portion.
9. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(i) the media pack being racetrack shaped;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(iii) the seal support extending outwardly;
(iv) the shell being racetrack shaped;
(c) grid work extending over the outlet flow face; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures.
10. An air filter cartridge according to claim 9 wherein:
(a) the shell includes:
(i) a sidewall portion; and
(ii) a transition portion canted relative to the sidewall portion.
11. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(c) grid work extending over the outlet flow face; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures;
(ii) the shell secured to the media pack by the seal arrangement.
12. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(c) grid work extending over the outlet flow face; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures.
13. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(c) grid work extending over the outlet flow face; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures;
(ii) the seal arrangement including no portion extending over the inlet flow face.
14. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face;
(b) an impermeable shell having opposite ends and a sidewall extending at least partially therebetween; the shell sidewall circumscribing the media pack; the shell having a seal support;
(i) the media pack being secured within the shell;
(ii) the seal support defining a plurality of seal flow apertures therethrough;
(c) grid work extending over the outlet flow face; and
(d) a seal arrangement secured to the seal support;
(i) the seal arrangement molded to the seal support and extending through the seal flow apertures.
15. An air filter cartridge comprising:
(a) a fluted filter media pack comprising fluted media secured to facing media; the media pack having an inlet flow face, an outlet flow face, and an axial length between the inlet flow face and outlet flow face; the media pack defining a longitudinal axis; and
(b) a shell and a seal arrangement; the shell having a sidewall and a portion that is canted relative to the longitudinal axis of the media pack; the shell sidewall circumscribing the media pack;
(i) the media pack being secured within the shell;
(ii) the seal arrangement being molded to the canted portion.
16. An air filter cartridge according to claim 15 wherein: (a) the seal arrangement includes a radial seal.
17. An air filter cartridge according to claim 15 further comprising:
(a) grid work extending over the outlet flow face;
(b) the grid work is an integral part of the shell; and
(c) a core within the media pack.
18. An air filter cartridge according to claim 15 wherein:
(a) the shell has a seal support;
(i) the seal support includes a plurality of seal flow apertures therethrough; and
(ii) the seal arrangement extends through the seal flow apertures.
19. An air filter cartridge according to claim 15 wherein:
(a) the seal arrangement is molded directly to the media pack; and
(b) the seal arrangement comprises foamed polyurethane.
Priority Applications (3)
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US13/042,859 US20110197556A1 (en) | 2004-11-02 | 2011-03-08 | Filter element |
US14/323,481 US9890750B2 (en) | 2004-11-02 | 2014-07-03 | Filter element |
US14/796,129 US9932943B2 (en) | 2004-11-02 | 2015-07-10 | Filter element |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US10/979,876 US7318851B2 (en) | 2004-11-02 | 2004-11-02 | Filter element |
US10/979,783 US20060091061A1 (en) | 2004-11-02 | 2004-11-02 | Filter assembly with sealing system |
US11/939,662 US8277531B2 (en) | 2004-11-02 | 2007-11-14 | Filter element |
US12/556,976 US20100000934A1 (en) | 2004-11-02 | 2009-09-10 | Filter assembly with sealing system |
US13/042,859 US20110197556A1 (en) | 2004-11-02 | 2011-03-08 | Filter element |
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US12/556,976 Continuation-In-Part US20100000934A1 (en) | 2004-11-02 | 2009-09-10 | Filter assembly with sealing system |
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US14/796,129 Active 2024-11-12 US9932943B2 (en) | 2004-11-02 | 2015-07-10 | Filter element |
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US14/796,129 Active 2024-11-12 US9932943B2 (en) | 2004-11-02 | 2015-07-10 | Filter element |
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---|---|---|---|---|
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US20140311110A1 (en) * | 2004-11-02 | 2014-10-23 | Baldwin Filters, Inc. | Filter element |
US20150059303A1 (en) * | 2013-09-02 | 2015-03-05 | Mann+Hummel Gmbh | Filter Element and Filter System |
US20150343338A1 (en) * | 2014-06-03 | 2015-12-03 | Yamashin-Filter Corp. | Filter element and filtering device |
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US9457310B2 (en) | 2003-12-22 | 2016-10-04 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly; and, methods |
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US20170291132A1 (en) * | 2014-09-09 | 2017-10-12 | Cummins Filtration Ip, Inc. | Axial flow air filter element |
WO2017212498A1 (en) * | 2016-06-09 | 2017-12-14 | Varroc Polymers Pvt. Ltd. | Improved sealing for vertically mounted air filter element |
US9861922B1 (en) * | 2016-10-14 | 2018-01-09 | Holley Performance Products, Inc. | Mating interface between air intake housing and air filter |
US9970394B2 (en) | 2012-07-25 | 2018-05-15 | Baldwin Filters, Inc. | Filter housing, fluted filter and safety filter |
US9993763B2 (en) | 2002-04-04 | 2018-06-12 | Donaldson Company, Inc. | Filter elements; air cleaner; assembly; and, methods |
US10010825B2 (en) | 2003-02-11 | 2018-07-03 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
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US10376823B2 (en) * | 2015-11-20 | 2019-08-13 | Baldwin Filters, Inc. | Filter element having mounting frame |
CN110446539A (en) * | 2017-03-16 | 2019-11-12 | 康明斯滤清系统知识产权公司 | Filter sealing system |
US10682597B2 (en) | 2016-04-14 | 2020-06-16 | Baldwin Filters, Inc. | Filter system |
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US11020698B2 (en) | 2015-12-11 | 2021-06-01 | Cummins Filtration Ip, Inc. | Filter with variable cross-section axial seal |
US11141687B2 (en) | 2016-05-02 | 2021-10-12 | Cummins Filtration Ip, Inc. | Filter with interlocking housing interface |
US11167234B2 (en) | 2016-03-18 | 2021-11-09 | Cummins Filtration Ip, Inc. | Interlocked stable filter assembly |
US11298640B2 (en) | 2017-01-25 | 2022-04-12 | Cummins Filtration Ip, Inc. | Expandable threaded adaptor for threadless shell |
US11358090B2 (en) | 2010-03-17 | 2022-06-14 | Baldwin Filters, Inc. | Fluid filter |
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US11439943B2 (en) * | 2016-10-20 | 2022-09-13 | Cummins Filtration Ip, Inc. | Interrupted, directional emboss of flat sheet |
WO2023044440A1 (en) * | 2021-09-17 | 2023-03-23 | Donaldson Company, Inc. | Safety filter element |
US11724220B2 (en) | 2017-02-21 | 2023-08-15 | Cummins Filtration Ip, Inc. | Undulated interlocking housing-endplate interface geometry |
US11833459B2 (en) | 2009-04-09 | 2023-12-05 | Cummins Filtration Ip, Inc. | Filtration sealing system |
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Citations (81)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1700126A (en) * | 1926-06-17 | 1929-01-29 | American Kreuger & Toll Corp | Filter medium for air and gases |
US1943080A (en) * | 1933-04-21 | 1934-01-09 | Samuel M Langston | Corrugator |
US1947066A (en) * | 1932-12-14 | 1934-02-13 | Samuel M Langston Co | Corrugator |
US1954881A (en) * | 1933-03-23 | 1934-04-17 | Samuel M Langston Co | Corrugator |
US3025963A (en) * | 1958-03-13 | 1962-03-20 | Russell H Curtis | Products useful as filtering devices and methods of making them |
US3255889A (en) * | 1961-04-10 | 1966-06-14 | American Mach & Foundry | Wound filter |
US3438588A (en) * | 1966-02-08 | 1969-04-15 | Svenska Flaektfabriken Ab | Advancing a filter mat in a roll filter |
US4252591A (en) * | 1979-05-02 | 1981-02-24 | Pall Corporation | Corrugating apparatus and process |
US4253228A (en) * | 1978-09-14 | 1981-03-03 | Filterspun, Inc. | Apparatus and system for forming wound filters |
US4257790A (en) * | 1979-10-10 | 1981-03-24 | Henningsen Foods, Inc. | Quick change filter bag arrangement |
US4498989A (en) * | 1981-02-23 | 1985-02-12 | Nippondenso Co., Ltd. | Fluid filter element and support |
US4579698A (en) * | 1982-05-28 | 1986-04-01 | Amf, Inc. | Process for producing a microporous polymeric filter membrane with adjacent non-porous edge layers and a pleated filter element formed from the membrane |
US4589983A (en) * | 1981-11-02 | 1986-05-20 | Donaldson Company, Inc. | Fluid filtering device |
US4720292A (en) * | 1986-07-14 | 1988-01-19 | Donaldson Company, Inc. | Cylindrical air filter with lightweight housing and radially directed seal |
US4747944A (en) * | 1986-04-29 | 1988-05-31 | Midwest Conservation Specialties, Inc. | Recirculating filter system |
US4798575A (en) * | 1985-06-20 | 1989-01-17 | Flodins Filter Ab | Method and apparatus for the manufacture of filters |
US4838905A (en) * | 1986-09-09 | 1989-06-13 | Domnick Hunter Filters Limited | Filter element and method of making a filter element |
US5213275A (en) * | 1991-07-17 | 1993-05-25 | General Dynamics Corporation, Space Systems Division | Reeding edge for securing in place fiber band during filament winding operation |
US5389175A (en) * | 1992-07-18 | 1995-02-14 | Filterwerk Mann & Hummel Gmbh | Method of manufacturing a pleated filter material |
US5484466A (en) * | 1994-02-14 | 1996-01-16 | Baldwin Filters, Inc. | Air filter element with radial seal sealing gasket |
US5609711A (en) * | 1994-06-21 | 1997-03-11 | Miller; Ray R. | Method of bonding laminates using pregelatinized starch |
US5720790A (en) * | 1995-12-26 | 1998-02-24 | Denso Corporation | Filter element |
US5755843A (en) * | 1994-05-10 | 1998-05-26 | Ab Volvo | Air filter with reusable gable plate |
US5772883A (en) * | 1996-04-26 | 1998-06-30 | Donaldson Company, Inc. | Slanted inline filter |
US5895574A (en) * | 1996-04-26 | 1999-04-20 | Donaldson Company, Inc. | Rolled liquid filter using fluted media |
US5902364A (en) * | 1996-04-26 | 1999-05-11 | Donaldson Company, Inc. | Conical filter |
US6022305A (en) * | 1998-03-11 | 2000-02-08 | Aaf International | Pleating apparatus |
US6048386A (en) * | 1996-04-26 | 2000-04-11 | Donaldson Company, Inc. | Integrated resonator and filter apparatus |
US6179890B1 (en) * | 1999-02-26 | 2001-01-30 | Donaldson Company, Inc. | Air cleaner having sealing arrangement between media arrangement and housing |
USD437402S1 (en) * | 1999-11-05 | 2001-02-06 | Donaldson Company, Inc. | Filter element with centerpiece |
US6190432B1 (en) * | 1999-02-26 | 2001-02-20 | Donaldson Company, Inc. | Filter arrangement; sealing system; and methods |
US6210469B1 (en) * | 1999-02-26 | 2001-04-03 | Donaldson Company, Inc. | Air filter arrangement having first and second filter media dividing a housing and methods |
US6221122B1 (en) * | 1999-02-26 | 2001-04-24 | Donaldson Company, Inc. | Filter element and methods |
US6235195B1 (en) * | 1999-02-26 | 2001-05-22 | Donaldson Company, Inc. | Filter element incorporating a handle member |
US6348085B1 (en) * | 1999-11-10 | 2002-02-19 | Donaldson Company, Inc. | Filter arrangement and methods |
US6348084B1 (en) * | 1999-11-05 | 2002-02-19 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
US6368374B1 (en) * | 2000-06-13 | 2002-04-09 | Donaldson Company, Inc. | Filter arrangement and methods |
US6374006B1 (en) * | 1998-03-20 | 2002-04-16 | Xtera Communications, Inc. | Chirped period gratings for raman amplification in circulator loop cavities |
US6402798B1 (en) * | 2000-09-19 | 2002-06-11 | Nelson Industries, Inc. | Twist and lock filter housing with nontorsional anti-rotation stop |
US6511599B2 (en) * | 2000-12-18 | 2003-01-28 | Nelson Industries, Inc. | Multi-element cylindrical filter with equalized flow |
US6517598B2 (en) * | 2001-06-06 | 2003-02-11 | Donaldson Company, Inc. | Filter element having flange and methods |
USD473637S1 (en) * | 2001-12-03 | 2003-04-22 | Donaldson Company, Inc. | Fluted filter element |
US20030089654A1 (en) * | 2000-05-12 | 2003-05-15 | Filterwerk Mann & Hummel Gmbh | Liquid filter with a cast metal housing and method of producing the same |
US20030146149A1 (en) * | 2001-10-24 | 2003-08-07 | Filterwerk Mann & Hummel Gmbh | Filter element suitable for filtering liquids |
US6673136B2 (en) * | 2000-09-05 | 2004-01-06 | Donaldson Company, Inc. | Air filtration arrangements having fluted media constructions and methods |
US6703675B1 (en) * | 2002-08-20 | 2004-03-09 | Memx, Inc. | Particle filter for partially enclosed microelectromechanical systems |
US6706087B1 (en) * | 1999-07-27 | 2004-03-16 | Mahle Filtersysteme Gmbh | Filter body of a fluid filter, especially an air filter |
US20040071940A1 (en) * | 2002-06-17 | 2004-04-15 | Frey Albert O. | Corrugated paperboard including tear line |
US6743317B2 (en) * | 2000-12-19 | 2004-06-01 | Robert M. Wydeven | Method of sealing, housing and constructing honeycomb filters |
US20040118771A1 (en) * | 2002-12-20 | 2004-06-24 | Schukar Murray R. | Filter coating, winding, finishing and manufacturing system |
US6851569B2 (en) * | 2002-04-22 | 2005-02-08 | Plastican, Inc. | Reusable lid and container |
US6852141B2 (en) * | 2001-06-06 | 2005-02-08 | Donaldson Company, Inc. | Filter element having center piece and methods |
US20050029184A1 (en) * | 2003-08-05 | 2005-02-10 | Desmarais Christopher P. | Fuel filter diverter |
US6878190B1 (en) * | 2001-06-06 | 2005-04-12 | Donaldson Company, Inc. | Filter element having sealing members and methods |
USD506539S1 (en) * | 2004-03-24 | 2005-06-21 | Donaldson Company, Inc. | Filter cartridge |
US7008465B2 (en) * | 2003-06-19 | 2006-03-07 | Donaldson Company, Inc. | Cleanable high efficiency filter media structure and applications for use |
US7008467B2 (en) * | 2002-04-04 | 2006-03-07 | Donaldson Company, Inc. | Air cleaner and method of filtering |
US20060091084A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Fluted filter media with intermediate flow restriction and method of making same |
US20060090434A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter element with canted seal support |
US20060091061A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter assembly with sealing system |
US20060090431A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter assembly with combination filter element |
US20060091066A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Fiters | Gathered filter media for an air filter and method of making same |
US20060091064A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter apparatus with separable seal support frame |
US7179317B2 (en) * | 2000-09-05 | 2007-02-20 | Donaldson Company, Inc. | Polymer, polymer microfiber, polymer nanofiber and applications including filter structures |
US20070039296A1 (en) * | 2003-03-18 | 2007-02-22 | Donaldson Company Inc. | Process and materials for coiling z-filter media, and/or closing flutes of filter media; and, products |
US7316723B2 (en) * | 2001-05-31 | 2008-01-08 | Donaldson Company, Inc. | Air filter with fine fiber and spun bonded media |
US20080016832A1 (en) * | 2004-03-24 | 2008-01-24 | Donaldson Company, Inc. | Filter Elements; Air Cleaner; Assemby; And Methods |
US7323029B2 (en) * | 2003-02-11 | 2008-01-29 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US20080022641A1 (en) * | 2004-02-17 | 2008-01-31 | Donaldson Company, Inc. | Air Cleaner Arrangements; Serviceable Filter Elements; And, Methods |
US7329326B2 (en) * | 1996-04-26 | 2008-02-12 | Donaldson Company, Inc. | Method of making a fluted filter media for air filter |
US7338544B2 (en) * | 2002-12-11 | 2008-03-04 | Donaldson Company, Inc. | Z-filter media with reverse-flow cleaning systems and methods |
US7341613B2 (en) * | 2003-04-02 | 2008-03-11 | Wix Filtration Corp Llc | Filter elements having injection molded thermoplastic seals and methods of making same |
US20080066434A1 (en) * | 2006-06-22 | 2008-03-20 | Kuempel Bradley A | Air cleaner arrangements; components thereof; and, methods |
US20080086990A1 (en) * | 2006-01-20 | 2008-04-17 | Kuempel Bradley A | Air cleaner configured for receipt of various sized filter cartridges; components thereof; and, methods |
US20080110142A1 (en) * | 2004-07-20 | 2008-05-15 | Donaldson Company, Inc. | Z-Filter Media Pack Arrangement; Filter Cartridge; Air Cleaner Arrangement; and, Methods |
US20080115470A1 (en) * | 2006-06-22 | 2008-05-22 | Kuempel Bradley A | Air cleaner arrangements; components thereof; and, methods |
US20090114590A1 (en) * | 2007-11-01 | 2009-05-07 | Baldwin Filters, Inc. | Winding Core Pressure Relief for Fluted Filter |
US20100011725A1 (en) * | 2008-07-17 | 2010-01-21 | Mann+Hummel Gmbh | Reinforced filter element |
US20100044297A1 (en) * | 2008-08-19 | 2010-02-25 | Perry Equipment Corporation | Contaminant Adsorbent Fluted Filter Element |
US7695539B2 (en) * | 2005-07-02 | 2010-04-13 | Mahle International Gmbh | Filter element and filter housing suitable for accommodation the same |
US7931725B2 (en) * | 2004-11-02 | 2011-04-26 | Baldwin Filters, Inc. | Fluted filter apparatus |
Family Cites Families (116)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1121896A (en) | 1966-07-21 | 1968-07-31 | Gen Motors Ltd | Air filters |
US3676247A (en) | 1969-02-03 | 1972-07-11 | Australian Paper Manufacturers | Corrugating paperboard |
US3679057A (en) | 1970-09-11 | 1972-07-25 | Damasco Rodolfo Adelto Perez | Screen filter pack and method for making same |
SE409948B (en) | 1976-03-16 | 1979-09-17 | Nederman Bill P Ph | FILTER DEVICE FOR SEPARATION OF SOLID PARTICLES FROM GASES, SPECIAL WELDING GASES |
DE2947080A1 (en) | 1979-11-22 | 1981-05-27 | Delbag-Luftfilter Gmbh, 1000 Berlin | Air filter cell - made from two pieces of cardboard and filter material |
EP0048608A1 (en) | 1980-09-22 | 1982-03-31 | Fram Europe Limited | Panel air filter and packaging |
GB2103106B (en) | 1981-04-28 | 1985-07-10 | Kleen Air Maintenance Services | Air filter |
JPS5876121A (en) | 1981-10-30 | 1983-05-09 | Color Toronitsuku Kk | Method and apparatus for filtering fine powder-containing gas |
GB8329395D0 (en) | 1983-11-03 | 1983-12-07 | Ciba Geigy Ag | Photopolymerisable compositions |
JPS60112320A (en) | 1983-11-24 | 1985-06-18 | Hitachi Ltd | Protecting system of tristate gate |
JPS60155921A (en) | 1984-01-25 | 1985-08-16 | Nippon Soken Inc | Rotary angle detection apparatus |
US4710297A (en) | 1985-06-15 | 1987-12-01 | Kabushiki Kaisha Tsuchiya Seisakusho | Fluid filter with pleated filter medium |
USH556H (en) | 1985-12-02 | 1988-12-06 | Method of manufacture and machine for manufacturing subterranean wall drain | |
JPS63122617A (en) | 1986-11-13 | 1988-05-26 | Lion Corp | Skin cleaning agent |
SE455378B (en) | 1986-11-17 | 1988-07-11 | Flodins Filter Ab | PROCEDURE FOR MANUFACTURING FILTERS |
JPH0231131A (en) | 1988-07-20 | 1990-02-01 | Rigaku Keisoku Kk | Method of industrial analysis of coal and infrared heating oven |
DE8810295U1 (en) | 1988-08-13 | 1988-10-13 | Stanelle, Karl-Heinz, 7129 Gueglingen, De | |
US5346675A (en) | 1988-12-16 | 1994-09-13 | Usui Kokusai Sangyo Kabushiki Kaisha | Exhaust gas cleaning apparatus |
US4903545A (en) | 1989-03-03 | 1990-02-27 | Sundstrand-Sauer | Hydrostatic transmission center section |
US4976857A (en) | 1989-05-03 | 1990-12-11 | Newport Filters, Inc. | Filter element and fabrication methodology |
WO1991019898A1 (en) | 1990-06-19 | 1991-12-26 | Allied-Signal Inc. | Filter and process for manufacturing a filter |
DE4024898A1 (en) | 1990-08-06 | 1992-02-13 | Mann & Hummel Filter | INTAKE AIR FILTER FOR THE COMBUSTION ENGINE OF A VEHICLE |
US5238474A (en) | 1990-10-19 | 1993-08-24 | Donaldson Company, Inc. | Filtration arrangement |
US5182015A (en) | 1991-07-02 | 1993-01-26 | Alberee Ltd., Inc. | Plastic oil filter assembly |
US5186829A (en) | 1991-08-16 | 1993-02-16 | Stanadyne Automotive Corp. | Fuel filter key system |
US5245897A (en) | 1991-11-25 | 1993-09-21 | E. I. Du Pont De Nemours And Company | System and method for advancing the leading edge of a corrugated web |
EP0558872B1 (en) | 1992-03-04 | 1996-08-28 | Ciba-Geigy Ag | Method and apparatus for winding of windable substrates |
JP3239517B2 (en) | 1992-06-17 | 2001-12-17 | 株式会社デンソー | Manufacturing method of filtration element |
DE9305767U1 (en) | 1993-04-16 | 1993-06-17 | Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg, De | |
JP3362453B2 (en) | 1993-05-21 | 2003-01-07 | 株式会社デンソー | Filtration element |
US5342511A (en) | 1993-07-06 | 1994-08-30 | Baldwin Filters, Inc. | Oil filter with inner and outer coaxial filter elements |
AU690142B2 (en) | 1993-09-24 | 1998-04-23 | Donaldson Company Inc. | Joint and seal system for air transfer tubes |
US5487767A (en) | 1993-09-30 | 1996-01-30 | Dana Corporation | Radially sealed air filters |
US5449086A (en) | 1993-10-18 | 1995-09-12 | Stant Manufacturing Inc. | Delayed actuation fuel cap |
NL9302132A (en) | 1993-12-07 | 1995-07-03 | Wiva Bv | Barrel with lockable lid. |
US5415677A (en) | 1993-12-28 | 1995-05-16 | Dana Corporation | Air filters including filters configured for both radial and axial sealing |
US5490930A (en) | 1994-09-27 | 1996-02-13 | Baldwin Filters, Inc. | Filter |
US5525226A (en) | 1994-10-14 | 1996-06-11 | Baldwin Filters, Inc. | Preformed gasket with retaining tabs |
US6004366A (en) | 1994-11-23 | 1999-12-21 | Donaldson Company, Inc. | Reverse flow air filter arrangement and method |
US5938804A (en) | 1994-11-23 | 1999-08-17 | Donaldson Company, Inc. | Reverse flow air filter arrangement and method |
US5588945A (en) | 1995-02-21 | 1996-12-31 | Corrugated Gear & Services, Inc. | Method and device for spacing a corrugating finger relative to a corrugating roll |
US5669949A (en) | 1995-04-21 | 1997-09-23 | Donaldson Company, Inc. | Air filtration arrangement |
US5685985A (en) | 1995-12-20 | 1997-11-11 | Baldwin Filters, Inc. | Environmentally friendly filter cartridge |
US5792242A (en) | 1996-02-26 | 1998-08-11 | Minnesota Mining And Manufacturing Co. | Electrostatic fibrous filter web |
USD399944S (en) | 1996-04-26 | 1998-10-20 | Donaldson Company, Inc. | Conical filter |
US5820646A (en) | 1996-04-26 | 1998-10-13 | Donaldson Company, Inc. | Inline filter apparatus |
US5906740A (en) | 1997-12-23 | 1999-05-25 | Baldwin Filters, Inc. | Spin-on filter with improved retaining groove |
US6024229A (en) | 1998-02-27 | 2000-02-15 | Ayers; William R. | Reusable filter assembly |
US6099606A (en) | 1998-03-19 | 2000-08-08 | Donaldson Company, Inc. | Air filtration arrangements having spacer constructions |
US6146527A (en) | 1998-04-21 | 2000-11-14 | Parker-Hannifin Corporation | Spin-on filter cartridge with replaceable element |
DE69902137T2 (en) | 1998-11-04 | 2003-01-30 | Rohm & Haas | Process for producing with high yield of methyl methacrylate or methacrylic acid |
US6405875B1 (en) | 1998-12-18 | 2002-06-18 | Corning Incorporated | Water filtration device and method |
US6261334B1 (en) | 1999-01-29 | 2001-07-17 | Nelson Industries, Inc. | High flow capacity filter |
US6126833A (en) | 1999-02-22 | 2000-10-03 | Ceramem Corporation | Cross-flow filtration device with filtrate conduit network and method of making same |
USD450827S1 (en) | 1999-02-26 | 2001-11-20 | Donaldson Company, Inc. | Filter element having sealing system |
USD461003S1 (en) | 1999-02-26 | 2002-07-30 | Donaldson Company, Inc. | Filter element having sealing system |
CN1590746B (en) | 1999-02-26 | 2010-04-14 | 唐纳森公司 | Sealing system for filter |
US6187188B1 (en) | 1999-07-19 | 2001-02-13 | Stanadyne Automotive Corp. | Filter cartridge retention system |
US6416605B1 (en) | 1999-11-24 | 2002-07-09 | Donaldson Company, Inc. | Method for manufacturing fluted media |
US6436162B1 (en) | 2000-03-22 | 2002-08-20 | Nelson Industries, Inc. | Twist and lock filter housing with anti-rotation stop |
US6946012B1 (en) | 2000-05-18 | 2005-09-20 | Fleetguard, Inc. | Filter and forming system |
USD450828S1 (en) | 2000-06-13 | 2001-11-20 | Donaldson Company, Inc. | Fluted filter element having a handle |
AU2002236683A1 (en) | 2000-10-27 | 2002-05-21 | Beth Israel Deaconess Medical Center | Non-isotopic detection of osteoblastic activity in vivo using modified bisphosphonates |
DE10063881A1 (en) | 2000-12-21 | 2002-06-27 | Mann & Hummel Filter | filter element |
US6447567B1 (en) | 2001-05-14 | 2002-09-10 | Baldwin Filters, Inc. | Air filter element with integral radial seal gasket |
USD460169S1 (en) | 2001-06-06 | 2002-07-09 | Donaldson Company Inc. | Filter element having an inlet grid |
CN1319624C (en) | 2001-12-03 | 2007-06-06 | 唐纳森公司 | Media, filter element using corrugated media sheet, corrugated sheet, and methods |
USD483459S1 (en) | 2002-01-23 | 2003-12-09 | Donaldson Company, Inc. | Air filter element for engine |
US6955701B2 (en) | 2002-03-28 | 2005-10-18 | Donaldson Company, Inc. | Filter element and use thereof; methods of manufacture |
ES2379227T3 (en) | 2002-05-09 | 2012-04-24 | Donaldson Company, Inc. | Air filter with side inlet |
US7168573B2 (en) | 2002-06-07 | 2007-01-30 | Baldwin Filters, Inc. | Environmentally friendly filter cartridge |
CA2491926A1 (en) | 2002-07-10 | 2004-01-22 | Donaldson Company, Inc. | Fluted filter medium and process for its manufacture |
US6780217B1 (en) | 2002-07-31 | 2004-08-24 | Dana Corporation | Panel air filter with gasket of non-woven felt |
US6959819B2 (en) | 2002-10-08 | 2005-11-01 | Pti Technologies, Inc. | Fatigue rated glass filled plastic filter assembly incorporating a coreless plastic filter element with integral seal |
USD484584S1 (en) | 2003-01-22 | 2003-12-30 | Donaldson Company, Inc. | Filter element for engine |
US20070137152A1 (en) | 2003-10-17 | 2007-06-21 | Jian Xu | Precleaner arrangement for use in air filtration, method of operation of precleaner and air cleaner comprising the precleaner arrangement |
US7655074B2 (en) | 2003-11-12 | 2010-02-02 | Donaldson Company, Inc. | Filter arrangements; side-entry housings; and methods |
WO2005058461A1 (en) | 2003-12-16 | 2005-06-30 | Donaldson Company, Inc. | Air cleaner arrangement and methods |
WO2007056589A2 (en) | 2005-11-09 | 2007-05-18 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly: and, methods |
US20090266041A1 (en) * | 2003-12-22 | 2009-10-29 | Donaldson Company, Inc. | Seal arrangement for filter element; Filter element assembly; and, methods |
US7396376B2 (en) * | 2003-12-22 | 2008-07-08 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly; and, methods |
WO2005082484A1 (en) | 2004-02-09 | 2005-09-09 | Donaldson Company, Inc. | Pleated corrugated filter media |
WO2005077487A1 (en) | 2004-02-10 | 2005-08-25 | Donaldson Company, Inc. | Media arrangement; filter constructions; and, methods |
US7905936B2 (en) | 2004-04-30 | 2011-03-15 | Donaldson Company, Inc. | Filter arrangements; housing; assemblies; and, methods |
ES2355832T3 (en) | 2004-06-08 | 2011-03-31 | Donaldson Company, Inc. | FILTER MEDIA PACKAGING PROVISION Z. |
WO2005123222A1 (en) | 2004-06-14 | 2005-12-29 | Donaldson Company, Inc. | Air filter arrangement; assembly; and, methods |
WO2006009766A1 (en) | 2004-06-18 | 2006-01-26 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter cartridge; and, methods |
WO2006014941A2 (en) | 2004-07-26 | 2006-02-09 | Donaldson Company, Inc. | Z-filter media pack arrangement; and, methods |
WO2006017790A1 (en) | 2004-08-06 | 2006-02-16 | Donaldson Company, Inc. | Air filter arrangement; assembly; and, methods |
US20110197556A1 (en) * | 2004-11-02 | 2011-08-18 | Baldwin Filters, Inc. | Filter element |
US20070186528A1 (en) | 2006-02-15 | 2007-08-16 | Baldwin Filters, Inc. | Fluted filter apparatus |
US7255300B2 (en) | 2004-11-03 | 2007-08-14 | Baldwin Filters, Inc. | Method and apparatus for winding a filter media pack |
US7850755B2 (en) | 2004-12-29 | 2010-12-14 | Baldwin Filters, Inc. | Filter with improved fatigue performance and torque transfer |
US8496723B2 (en) | 2005-01-13 | 2013-07-30 | Donaldson Company, Inc. | Air filter arrangement |
EP1850943B1 (en) | 2005-01-13 | 2013-06-05 | Donaldson Company, Inc. | Air filter cartridge and air cleaner assembly |
US8083825B2 (en) | 2005-02-28 | 2011-12-27 | Donaldson Company, Inc. | Filter arrangement and method |
WO2007009039A1 (en) | 2005-07-13 | 2007-01-18 | Donaldson Company, Inc. | Air filter cartridge and air filter |
KR101575553B1 (en) | 2005-10-11 | 2015-12-07 | 도날드슨 컴파니, 인코포레이티드 | Air filter arrangement, assembly, and methods |
AU2007208407C1 (en) | 2006-01-23 | 2012-10-25 | Baldwin Filters, Inc. | Filter |
US7753982B2 (en) | 2006-02-17 | 2010-07-13 | Baldwin Filters, Inc. | Filter with drained jacket, seal indicator/lock means, and seal baffle |
US7625419B2 (en) | 2006-05-10 | 2009-12-01 | Donaldson Company, Inc. | Air filter arrangement; assembly; and, methods |
WO2007145939A2 (en) | 2006-06-12 | 2007-12-21 | Donaldson Company, Inc. | Rolled axial flow filter and methods |
WO2008045325A2 (en) | 2006-10-06 | 2008-04-17 | Donaldson Company, Inc. | Air cleaner assembly, air cleaner filter cartridge, and method of servicing an air cleaner assembly |
US9757676B2 (en) | 2006-12-06 | 2017-09-12 | Baldwin Filters, Inc. | Method and apparatus for winding a filter element |
EP2514506B1 (en) | 2007-02-02 | 2019-08-14 | Donaldson Company, Inc. | Air filtration media pack and methods |
WO2008098185A1 (en) | 2007-02-09 | 2008-08-14 | Donaldson Company, Inc. | Combination filter element |
JP5385792B2 (en) | 2007-02-26 | 2014-01-08 | ドナルドソン カンパニー,インコーポレイティド | Filter composition, air cleaner assembly and method |
US8361181B2 (en) | 2008-06-06 | 2013-01-29 | Donaldson Company, Inc. | Air cleaner assemblies; filter cartridges therefor; features; and, methods |
US8048187B2 (en) | 2008-06-30 | 2011-11-01 | Baldwin Filters, Inc. | Filter frame attachment and fluted filter having same |
US7959703B2 (en) | 2008-06-30 | 2011-06-14 | Baldwin Filters, Inc. | Fluted filter with integrated frame |
WO2010017407A1 (en) | 2008-08-06 | 2010-02-11 | Donaldson Company, Inc. | Z-media having flute closures, methods and apparatus |
US8506668B2 (en) | 2009-03-30 | 2013-08-13 | Baldwin Filters, Inc. | Fluted filter with axial seal |
GB2491081A (en) | 2010-03-17 | 2012-11-21 | Baldwin Filters Inc | Fluid filter |
US8592703B2 (en) | 2010-05-10 | 2013-11-26 | Martin R. Johnson | Tamper-resistant, energy-harvesting switch assemblies |
JP6216378B2 (en) * | 2012-07-25 | 2017-10-18 | ボールドウィン・フィルターズ・インコーポレーテッドBaldwin Filters Inc | Filter housing, pleated filter, and safety filter |
US9089804B2 (en) | 2012-11-19 | 2015-07-28 | Donaldson Company, Inc. | Filter arrangements; components; assemblies; and, methods |
-
2011
- 2011-03-08 US US13/042,859 patent/US20110197556A1/en not_active Abandoned
-
2014
- 2014-07-03 US US14/323,481 patent/US9890750B2/en active Active
-
2015
- 2015-07-10 US US14/796,129 patent/US9932943B2/en active Active
Patent Citations (102)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1700126A (en) * | 1926-06-17 | 1929-01-29 | American Kreuger & Toll Corp | Filter medium for air and gases |
US1947066A (en) * | 1932-12-14 | 1934-02-13 | Samuel M Langston Co | Corrugator |
US1954881A (en) * | 1933-03-23 | 1934-04-17 | Samuel M Langston Co | Corrugator |
US1943080A (en) * | 1933-04-21 | 1934-01-09 | Samuel M Langston | Corrugator |
US3025963A (en) * | 1958-03-13 | 1962-03-20 | Russell H Curtis | Products useful as filtering devices and methods of making them |
US3255889A (en) * | 1961-04-10 | 1966-06-14 | American Mach & Foundry | Wound filter |
US3438588A (en) * | 1966-02-08 | 1969-04-15 | Svenska Flaektfabriken Ab | Advancing a filter mat in a roll filter |
US4253228A (en) * | 1978-09-14 | 1981-03-03 | Filterspun, Inc. | Apparatus and system for forming wound filters |
US4252591A (en) * | 1979-05-02 | 1981-02-24 | Pall Corporation | Corrugating apparatus and process |
US4257790A (en) * | 1979-10-10 | 1981-03-24 | Henningsen Foods, Inc. | Quick change filter bag arrangement |
US4498989A (en) * | 1981-02-23 | 1985-02-12 | Nippondenso Co., Ltd. | Fluid filter element and support |
US4589983A (en) * | 1981-11-02 | 1986-05-20 | Donaldson Company, Inc. | Fluid filtering device |
US4579698A (en) * | 1982-05-28 | 1986-04-01 | Amf, Inc. | Process for producing a microporous polymeric filter membrane with adjacent non-porous edge layers and a pleated filter element formed from the membrane |
US4798575A (en) * | 1985-06-20 | 1989-01-17 | Flodins Filter Ab | Method and apparatus for the manufacture of filters |
US4747944A (en) * | 1986-04-29 | 1988-05-31 | Midwest Conservation Specialties, Inc. | Recirculating filter system |
US4720292A (en) * | 1986-07-14 | 1988-01-19 | Donaldson Company, Inc. | Cylindrical air filter with lightweight housing and radially directed seal |
US4720292B1 (en) * | 1986-07-14 | 1991-09-10 | Cylindrical air filter with lightweight housing and radially directed seal | |
US4720292B2 (en) * | 1986-07-14 | 1994-02-22 | Donaldson Company, Inc. | |
US4838905A (en) * | 1986-09-09 | 1989-06-13 | Domnick Hunter Filters Limited | Filter element and method of making a filter element |
US5213275A (en) * | 1991-07-17 | 1993-05-25 | General Dynamics Corporation, Space Systems Division | Reeding edge for securing in place fiber band during filament winding operation |
US5389175A (en) * | 1992-07-18 | 1995-02-14 | Filterwerk Mann & Hummel Gmbh | Method of manufacturing a pleated filter material |
US5484466A (en) * | 1994-02-14 | 1996-01-16 | Baldwin Filters, Inc. | Air filter element with radial seal sealing gasket |
US5755843A (en) * | 1994-05-10 | 1998-05-26 | Ab Volvo | Air filter with reusable gable plate |
US5609711A (en) * | 1994-06-21 | 1997-03-11 | Miller; Ray R. | Method of bonding laminates using pregelatinized starch |
US5720790A (en) * | 1995-12-26 | 1998-02-24 | Denso Corporation | Filter element |
US5895574A (en) * | 1996-04-26 | 1999-04-20 | Donaldson Company, Inc. | Rolled liquid filter using fluted media |
US5902364A (en) * | 1996-04-26 | 1999-05-11 | Donaldson Company, Inc. | Conical filter |
US6048386A (en) * | 1996-04-26 | 2000-04-11 | Donaldson Company, Inc. | Integrated resonator and filter apparatus |
US5772883A (en) * | 1996-04-26 | 1998-06-30 | Donaldson Company, Inc. | Slanted inline filter |
US7329326B2 (en) * | 1996-04-26 | 2008-02-12 | Donaldson Company, Inc. | Method of making a fluted filter media for air filter |
US6022305A (en) * | 1998-03-11 | 2000-02-08 | Aaf International | Pleating apparatus |
US6374006B1 (en) * | 1998-03-20 | 2002-04-16 | Xtera Communications, Inc. | Chirped period gratings for raman amplification in circulator loop cavities |
US6221122B1 (en) * | 1999-02-26 | 2001-04-24 | Donaldson Company, Inc. | Filter element and methods |
US6210469B1 (en) * | 1999-02-26 | 2001-04-03 | Donaldson Company, Inc. | Air filter arrangement having first and second filter media dividing a housing and methods |
US6190432B1 (en) * | 1999-02-26 | 2001-02-20 | Donaldson Company, Inc. | Filter arrangement; sealing system; and methods |
US6235195B1 (en) * | 1999-02-26 | 2001-05-22 | Donaldson Company, Inc. | Filter element incorporating a handle member |
US6179890B1 (en) * | 1999-02-26 | 2001-01-30 | Donaldson Company, Inc. | Air cleaner having sealing arrangement between media arrangement and housing |
US6350291B1 (en) * | 1999-02-26 | 2002-02-26 | Donaldson Company, Inc. | Filter arrangement; sealing system; and methods |
US6706087B1 (en) * | 1999-07-27 | 2004-03-16 | Mahle Filtersysteme Gmbh | Filter body of a fluid filter, especially an air filter |
US6348084B1 (en) * | 1999-11-05 | 2002-02-19 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
US7211124B2 (en) * | 1999-11-05 | 2007-05-01 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
US7001450B2 (en) * | 1999-11-05 | 2006-02-21 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
US6547857B2 (en) * | 1999-11-05 | 2003-04-15 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
US6746518B2 (en) * | 1999-11-05 | 2004-06-08 | Donaldson Company, Inc. | Filter element, air cleaner, and methods |
USD437402S1 (en) * | 1999-11-05 | 2001-02-06 | Donaldson Company, Inc. | Filter element with centerpiece |
US6348085B1 (en) * | 1999-11-10 | 2002-02-19 | Donaldson Company, Inc. | Filter arrangement and methods |
US6533845B2 (en) * | 1999-11-10 | 2003-03-18 | Donaldson Company, Inc. | Filter arrangement and methods |
US6994744B2 (en) * | 1999-11-10 | 2006-02-07 | Donaldson Company, Inc. | Filter arrangement and methods |
US20030089654A1 (en) * | 2000-05-12 | 2003-05-15 | Filterwerk Mann & Hummel Gmbh | Liquid filter with a cast metal housing and method of producing the same |
US6368374B1 (en) * | 2000-06-13 | 2002-04-09 | Donaldson Company, Inc. | Filter arrangement and methods |
US6673136B2 (en) * | 2000-09-05 | 2004-01-06 | Donaldson Company, Inc. | Air filtration arrangements having fluted media constructions and methods |
US7179317B2 (en) * | 2000-09-05 | 2007-02-20 | Donaldson Company, Inc. | Polymer, polymer microfiber, polymer nanofiber and applications including filter structures |
US20080110822A1 (en) * | 2000-09-05 | 2008-05-15 | Donaldson Company, Inc. | Fine fiber media layer |
US20080010959A1 (en) * | 2000-09-05 | 2008-01-17 | Donaldson Company, Inc. | Air filtration arrangements having fluted media constructions and methods |
US7318852B2 (en) * | 2000-09-05 | 2008-01-15 | Donaldson Company, Inc. | Bag house filter with fine fiber and spun bonded media |
US6402798B1 (en) * | 2000-09-19 | 2002-06-11 | Nelson Industries, Inc. | Twist and lock filter housing with nontorsional anti-rotation stop |
US6511599B2 (en) * | 2000-12-18 | 2003-01-28 | Nelson Industries, Inc. | Multi-element cylindrical filter with equalized flow |
US6743317B2 (en) * | 2000-12-19 | 2004-06-01 | Robert M. Wydeven | Method of sealing, housing and constructing honeycomb filters |
US7316723B2 (en) * | 2001-05-31 | 2008-01-08 | Donaldson Company, Inc. | Air filter with fine fiber and spun bonded media |
US6517598B2 (en) * | 2001-06-06 | 2003-02-11 | Donaldson Company, Inc. | Filter element having flange and methods |
US6997968B2 (en) * | 2001-06-06 | 2006-02-14 | Donaldson Company, Inc. | Filter element having sealing members and methods |
US6852141B2 (en) * | 2001-06-06 | 2005-02-08 | Donaldson Company, Inc. | Filter element having center piece and methods |
US6878190B1 (en) * | 2001-06-06 | 2005-04-12 | Donaldson Company, Inc. | Filter element having sealing members and methods |
US20030146149A1 (en) * | 2001-10-24 | 2003-08-07 | Filterwerk Mann & Hummel Gmbh | Filter element suitable for filtering liquids |
USD473637S1 (en) * | 2001-12-03 | 2003-04-22 | Donaldson Company, Inc. | Fluted filter element |
US20060101795A1 (en) * | 2002-04-04 | 2006-05-18 | Donaldson Company, Inc. | Filter Elements; Air Cleaner; Assembly; and, Methods |
US7008467B2 (en) * | 2002-04-04 | 2006-03-07 | Donaldson Company, Inc. | Air cleaner and method of filtering |
US6851569B2 (en) * | 2002-04-22 | 2005-02-08 | Plastican, Inc. | Reusable lid and container |
US20040071940A1 (en) * | 2002-06-17 | 2004-04-15 | Frey Albert O. | Corrugated paperboard including tear line |
US6703675B1 (en) * | 2002-08-20 | 2004-03-09 | Memx, Inc. | Particle filter for partially enclosed microelectromechanical systems |
US7338544B2 (en) * | 2002-12-11 | 2008-03-04 | Donaldson Company, Inc. | Z-filter media with reverse-flow cleaning systems and methods |
US20040118771A1 (en) * | 2002-12-20 | 2004-06-24 | Schukar Murray R. | Filter coating, winding, finishing and manufacturing system |
US7323029B2 (en) * | 2003-02-11 | 2008-01-29 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US7351270B2 (en) * | 2003-02-11 | 2008-04-01 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US20080115758A1 (en) * | 2003-02-11 | 2008-05-22 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US20070039296A1 (en) * | 2003-03-18 | 2007-02-22 | Donaldson Company Inc. | Process and materials for coiling z-filter media, and/or closing flutes of filter media; and, products |
US7341613B2 (en) * | 2003-04-02 | 2008-03-11 | Wix Filtration Corp Llc | Filter elements having injection molded thermoplastic seals and methods of making same |
US7008465B2 (en) * | 2003-06-19 | 2006-03-07 | Donaldson Company, Inc. | Cleanable high efficiency filter media structure and applications for use |
US20050029184A1 (en) * | 2003-08-05 | 2005-02-10 | Desmarais Christopher P. | Fuel filter diverter |
US20080022641A1 (en) * | 2004-02-17 | 2008-01-31 | Donaldson Company, Inc. | Air Cleaner Arrangements; Serviceable Filter Elements; And, Methods |
US7674308B2 (en) * | 2004-03-24 | 2010-03-09 | Donaldson Company, Inc. | Filter elements; air cleaner; assembly; and methods |
US20080016832A1 (en) * | 2004-03-24 | 2008-01-24 | Donaldson Company, Inc. | Filter Elements; Air Cleaner; Assemby; And Methods |
US20100115897A1 (en) * | 2004-03-24 | 2010-05-13 | Donaldson Company, Inc. | Filter elements; air cleaner; assembly; and, methods |
USD506539S1 (en) * | 2004-03-24 | 2005-06-21 | Donaldson Company, Inc. | Filter cartridge |
US20080110142A1 (en) * | 2004-07-20 | 2008-05-15 | Donaldson Company, Inc. | Z-Filter Media Pack Arrangement; Filter Cartridge; Air Cleaner Arrangement; and, Methods |
US20060090434A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter element with canted seal support |
US20080060329A1 (en) * | 2004-11-02 | 2008-03-13 | Baldwin Filters, Inc. | Filter Element |
US7931725B2 (en) * | 2004-11-02 | 2011-04-26 | Baldwin Filters, Inc. | Fluted filter apparatus |
US20060091064A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter apparatus with separable seal support frame |
US20060091066A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Fiters | Gathered filter media for an air filter and method of making same |
US20060090431A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter assembly with combination filter element |
US20060091061A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Filter assembly with sealing system |
US7318851B2 (en) * | 2004-11-02 | 2008-01-15 | Baldwin Filters, Inc. | Filter element |
US20060091084A1 (en) * | 2004-11-02 | 2006-05-04 | Baldwin Filters, Inc. | Fluted filter media with intermediate flow restriction and method of making same |
US20100000934A1 (en) * | 2004-11-02 | 2010-01-07 | Baldwin Filters, Inc. | Filter assembly with sealing system |
US7695539B2 (en) * | 2005-07-02 | 2010-04-13 | Mahle International Gmbh | Filter element and filter housing suitable for accommodation the same |
US20080086990A1 (en) * | 2006-01-20 | 2008-04-17 | Kuempel Bradley A | Air cleaner configured for receipt of various sized filter cartridges; components thereof; and, methods |
US20080115470A1 (en) * | 2006-06-22 | 2008-05-22 | Kuempel Bradley A | Air cleaner arrangements; components thereof; and, methods |
US20080066434A1 (en) * | 2006-06-22 | 2008-03-20 | Kuempel Bradley A | Air cleaner arrangements; components thereof; and, methods |
US20090114590A1 (en) * | 2007-11-01 | 2009-05-07 | Baldwin Filters, Inc. | Winding Core Pressure Relief for Fluted Filter |
US20100011725A1 (en) * | 2008-07-17 | 2010-01-21 | Mann+Hummel Gmbh | Reinforced filter element |
US20100044297A1 (en) * | 2008-08-19 | 2010-02-25 | Perry Equipment Corporation | Contaminant Adsorbent Fluted Filter Element |
Cited By (51)
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US9993763B2 (en) | 2002-04-04 | 2018-06-12 | Donaldson Company, Inc. | Filter elements; air cleaner; assembly; and, methods |
US10589209B2 (en) | 2003-02-11 | 2020-03-17 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US11318408B2 (en) | 2003-02-11 | 2022-05-03 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US10010825B2 (en) | 2003-02-11 | 2018-07-03 | Donaldson Company, Inc. | Air cleaner arrangements; serviceable filter elements; and, methods |
US10279303B2 (en) | 2003-12-22 | 2019-05-07 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly; and, methods |
US11123676B2 (en) | 2003-12-22 | 2021-09-21 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly; and, methods |
US9457310B2 (en) | 2003-12-22 | 2016-10-04 | Donaldson Company, Inc. | Seal arrangement for filter element; filter element assembly; and, methods |
US9890750B2 (en) * | 2004-11-02 | 2018-02-13 | Baldwin Filters, Inc. | Filter element |
US8540790B2 (en) | 2004-11-02 | 2013-09-24 | Baldwin Filters, Inc. | Filter element |
US20140311110A1 (en) * | 2004-11-02 | 2014-10-23 | Baldwin Filters, Inc. | Filter element |
US9932943B2 (en) | 2004-11-02 | 2018-04-03 | Baldwin Filters, Inc. | Filter element |
US8551375B2 (en) | 2004-11-02 | 2013-10-08 | Baldwin Filters, Inc. | Filter element |
US11833459B2 (en) | 2009-04-09 | 2023-12-05 | Cummins Filtration Ip, Inc. | Filtration sealing system |
US11358090B2 (en) | 2010-03-17 | 2022-06-14 | Baldwin Filters, Inc. | Fluid filter |
US8673043B2 (en) | 2010-03-17 | 2014-03-18 | Baldwin Filters, Inc. | Fluid filter |
US9970394B2 (en) | 2012-07-25 | 2018-05-15 | Baldwin Filters, Inc. | Filter housing, fluted filter and safety filter |
US20150059303A1 (en) * | 2013-09-02 | 2015-03-05 | Mann+Hummel Gmbh | Filter Element and Filter System |
US9987570B2 (en) * | 2014-06-03 | 2018-06-05 | Yamashin-Filter Corp. | Filter element and filtering device |
JP2015229164A (en) * | 2014-06-03 | 2015-12-21 | ヤマシンフィルタ株式会社 | Filter element and filter device |
US20150343338A1 (en) * | 2014-06-03 | 2015-12-03 | Yamashin-Filter Corp. | Filter element and filtering device |
US9346000B2 (en) * | 2014-07-30 | 2016-05-24 | Pro-Pure Inc. | Air filter |
US20160030872A1 (en) * | 2014-07-30 | 2016-02-04 | Pro-Pure Inc. | Air filter |
CN105298697A (en) * | 2014-07-30 | 2016-02-03 | 淳靖股份有限公司 | Air filter |
US10486096B2 (en) * | 2014-09-09 | 2019-11-26 | Cummins Filtration Ip, Inc. | Axial flow air filter element |
US20170291132A1 (en) * | 2014-09-09 | 2017-10-12 | Cummins Filtration Ip, Inc. | Axial flow air filter element |
US20160296861A1 (en) * | 2015-04-09 | 2016-10-13 | Pro-Pure Inc. | Filter cartridge and manufacturing method thereof |
US10124567B2 (en) * | 2015-04-09 | 2018-11-13 | Pro-Pure Inc. | Filter cartridge and manufacturing method thereof |
US10376823B2 (en) * | 2015-11-20 | 2019-08-13 | Baldwin Filters, Inc. | Filter element having mounting frame |
US11020698B2 (en) | 2015-12-11 | 2021-06-01 | Cummins Filtration Ip, Inc. | Filter with variable cross-section axial seal |
US11167234B2 (en) | 2016-03-18 | 2021-11-09 | Cummins Filtration Ip, Inc. | Interlocked stable filter assembly |
US11813559B2 (en) | 2016-03-18 | 2023-11-14 | Cummins Filtration Ip, Inc. | Interlocked stable filter assembly |
US10682597B2 (en) | 2016-04-14 | 2020-06-16 | Baldwin Filters, Inc. | Filter system |
US11141687B2 (en) | 2016-05-02 | 2021-10-12 | Cummins Filtration Ip, Inc. | Filter with interlocking housing interface |
US11660560B2 (en) | 2016-05-02 | 2023-05-30 | Cummins Filtration Ip, Inc. | Filter with interlocking housing interface |
WO2017212498A1 (en) * | 2016-06-09 | 2017-12-14 | Varroc Polymers Pvt. Ltd. | Improved sealing for vertically mounted air filter element |
US9987580B2 (en) * | 2016-10-14 | 2018-06-05 | Holley Performance Products, Inc. | Mating interface between air intake housing and air filter |
US9861922B1 (en) * | 2016-10-14 | 2018-01-09 | Holley Performance Products, Inc. | Mating interface between air intake housing and air filter |
US11439943B2 (en) * | 2016-10-20 | 2022-09-13 | Cummins Filtration Ip, Inc. | Interrupted, directional emboss of flat sheet |
US11865488B2 (en) | 2016-10-20 | 2024-01-09 | Cummins Filtration Ip, Inc. | Interrupted, directional emboss of flat sheet |
US11376541B2 (en) * | 2016-12-15 | 2022-07-05 | Cummins Filtration Ip, Inc. | Tetrahedral filter media |
US11298640B2 (en) | 2017-01-25 | 2022-04-12 | Cummins Filtration Ip, Inc. | Expandable threaded adaptor for threadless shell |
US11724220B2 (en) | 2017-02-21 | 2023-08-15 | Cummins Filtration Ip, Inc. | Undulated interlocking housing-endplate interface geometry |
US11235275B2 (en) | 2017-03-16 | 2022-02-01 | Cummins Filtration Ip, Inc. | Filtration sealing system |
CN110446539A (en) * | 2017-03-16 | 2019-11-12 | 康明斯滤清系统知识产权公司 | Filter sealing system |
US20200155994A1 (en) * | 2019-01-28 | 2020-05-21 | Zhejiang Haanyo Intelligence Technology Co., Ltd | Self-cleaning air filter and control system thereof |
CN109578181A (en) * | 2019-01-28 | 2019-04-05 | 上海邗越智能科技有限公司 | A kind of self-cleaning air filter and its control system |
WO2020163231A1 (en) * | 2019-02-04 | 2020-08-13 | Donaldson Company, Inc. | Filter element for filtering a fluid |
US11434854B2 (en) * | 2020-01-27 | 2022-09-06 | Deere & Company | Air filter system for a utility vehicle |
WO2023044440A1 (en) * | 2021-09-17 | 2023-03-23 | Donaldson Company, Inc. | Safety filter element |
Also Published As
Publication number | Publication date |
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US20150316009A1 (en) | 2015-11-05 |
US9932943B2 (en) | 2018-04-03 |
US9890750B2 (en) | 2018-02-13 |
US20140311110A1 (en) | 2014-10-23 |
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