WO1988003431A1 - Liquid filter apparatus - Google Patents

Liquid filter apparatus Download PDF

Info

Publication number
WO1988003431A1
WO1988003431A1 PCT/US1987/002842 US8702842W WO8803431A1 WO 1988003431 A1 WO1988003431 A1 WO 1988003431A1 US 8702842 W US8702842 W US 8702842W WO 8803431 A1 WO8803431 A1 WO 8803431A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
liquid
flow channels
radial
open
Prior art date
Application number
PCT/US1987/002842
Other languages
French (fr)
Inventor
Evan A. Edwards
Richard Mayo
Original Assignee
Eastman Kodak Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Company filed Critical Eastman Kodak Company
Publication of WO1988003431A1 publication Critical patent/WO1988003431A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/22—Cell-type filters
    • B01D25/24—Cell-type roll filters

Definitions

  • This invention relates to a disposable liquid filter supported by an open mounting holder allowing simple replacement of the filter.
  • liquid filters are installed by the user in a steel housing which is a part of the filter and of the liquid path through it.
  • a prior art housing typically has inlet and outlet pipe connections and is itself a pres ⁇ sure vessel with a heavy cover clamped in place to make the unit leak proof and to safely contain the liquid pressure.
  • the liquid pres- sure does not exceed 75 psi, it may be more convenient and less expensive to have a disposable filter unit in- its own plastic housing adapted for direct hose connection ' s at inlet and outlet.
  • Keenan discloses a filter assembly including a tie rod mounting holder and filter unit, the filter unit being removable from the holder by loosening the tie rods.
  • Pages discloses a filter assembly, also held together by tie rods, and including a filter element having a plurality of axial fluid channels. These channels in Pages are open at both ends for a continuous fluid flow in series from one to another.
  • Wozniak et al. discloses a filter assembly having radial flow channels in one of its end caps.
  • the present invention may be summarized as a liquid filter apparatus, for connection to inlet and outlet liquid lines, and including a mounting holder and a removable disposable filter unit mounted in the holder.
  • the disposable filter unit includes bottom and top end caps, with a core tube plugged at both ends and a concen ⁇ tric outer tube sealed to and extending between the end caps.
  • the top and bottom end caps and the outer tube are made of a plastic material for economy and disposability.
  • a filter element between the core tube and the outer tube stands on radial ribs extending upward from the bottom end cap and is spaced from the top end cap by similar radial ribs extending downward from the top end cap, these ribs . creating radial flow channels above and below the filter element.
  • the filter element is a wound spiral of a sandwich including a flat filter sheet material and a corrugated impermeable polymeric separator sheet, forming a plurality of axial flow channels. Some of these axial flow channels are open at the top to receive liquid from the top radial flow channel and closed at the bottom, and some of the axial flow channels are closed at the top and open at the bottom to discharge liquid into the bottom radial flow channel. Filter action is by radial flow, through the filter material, from the open-top ' channels to the open- bottom channels.
  • the mounting holder includes upper and lower mounting plates and tie rods between them to releas- ably hold the filter unit together and to permit easy removal and replacement of the filter unit. The mounting plates and tie rods give strength to the filter unit., preventing liquid pressure from blowing off the end caps. Means are provided to verit y air from the filter unit. BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a sectional elevation view of the filter and mounting holder of this invention.
  • Figure 2 is a top vie of the upper mounting holder of FIG. 1.
  • Figure 3 is a partial front view of the mounting holder of FIG. 2.
  • FIG. 4 is a schematic top view, somewhat ' enlarged, of a filter element according to this invention.
  • Figure 5 is a still further enlarged schematic detail of FIG. 4.
  • Figure 6 is a bottom view of the top end cap.
  • Figure 7 is a top view of the bottom end cap.
  • Mounting holder 2 includes an upper mounting plate 4 fastened to a stationary support means such as flanged brackets exemplified at 6, and a similar lower mounting plate 8 which hangs from upper plate 4 on four tie rods 10.
  • Tie rods 10 include wing nuts 12 at their tops by which the assembly is tightened for normal operation and loosened for removal and replacement of the filter 20.
  • Each of the mounting plates is somewhat “C” shaped, having an open aperture 14 facing forward of the apparatus (see also FIG. 2) .
  • a pair of upper channel beam ' s or cross bars 16 extend across the top of upper plate 4, ' one extending -between the two tie rods 10 at the rear and one extending between the two tie rods 10 at the front.
  • a pair of lower channel beams or cross bars 18 extend across the bottom of lower plate 8, one extending between the two tie rods 10 at the rear and one extending between the two tie rods 10 at the front.
  • Cross bars 16 and 18 bear on their respective upper and lower mounting plates by means of the tie rods 10 and wing nuts 12 pro ⁇ viding longitudinal strength to the mounting plates.
  • Cross bars 16 and 18 in the front of the unit are mounted for rotation on one of the front tie rods so they can be swung open when the wing nuts are loosened to permit placement and removal of the filter 20.
  • the upper front cross bar 16 includes depending heel piece 17 to fill the space of the open aperture 14 when the mounting holder is closed.
  • a similar heel piece, not shown, is mounted atop the lower front cross bar 18 for the same purpose. This makes the mounting plate-heel combination flush at top and bottom.
  • the end surfaces of the top and bottom end caps are substantially in total contact with the flush mounting plate-heel combination at top and bottom. This prevents distortion of the filter and the consequent breaking of seals when hydraulic pressure is applied.
  • the filter 20 is an integral unit which fits into the mounting holder 2 and is laterally removable from it.
  • Filter 20 includes a bottom end cap 22 (see also FIG. 7) having a central outlet port ⁇ r 0UT" which is adapted, as for example by pipe threads, for connection to an outlet liquid line.
  • a similar top end cap 26 includes a central inlet port • ⁇ IN" which is also adapted, as for example by pipe threads, for connection to an inlet liquid line.
  • Bottom end cap 22 includes a plurality of upstanding radial ribs 23 creating a plurality of radial outlet flow channels 24 " and supporting the filter element 40.
  • Top end cap 26 includes a plurality of depending radial ribs 27 creating a plurality of radial inlet flow channels 28 over the filter element 40.
  • An outer cylindrical tube 30 fits * within peripheral flange 32 in the bottom end cap 22 and peripheral flange 34 in the top end cap 26. These connections between outer tube 30 and the bottom and top end caps 22 and 26 are sealed with a sealant such as an electro-magnetically actuated polypropylene adhesive sealer or similar suitable sealing composition so that the filter unit is liquid-tight.
  • the end caps and the outer tube are all of a plastic material such as polypropylene for economy and disposability.
  • a normally closed vent passage 29 is provided in the top end cap 26 to remove air or gases from the system as necessary.
  • the sealing engagement of the bottom end cap 22 with the outer tube 30, and the sealing engagement of the top end cap 26 with the outer tube 30, are all represented by deposits 50 of sealant at the respective locations of connection.
  • a filter element 40 (see also FIG. 4) is a spiral wound roll of a sandwich including a flat filter sheet material 43, interleaved with a corrugated polymeric separator sheet 41 resting on the tops of upstanding*ribs 23 of the bottom end cap.
  • the corrugations of the filter element provide spacing between successive layers of the wound roll, which spaces are axial flow channels for the liquid passing through the filter.
  • Alternate axial flow channels 42 are blanked off at the bottom, while successive alternate axial flow channels 44 are blanked off at the top so that fluid enters at the top of the open-top channels 42 and leaves at the bottom of the open-bottom channels 44.
  • Filter action is by way of radial flow, through the filter material 43, from the open-top channels 42 to the open- bottom channels 44 as indicated in FIG. 5.
  • the filter element 40 is formed around a core tube 46 which is sealed at its ends by plugs 48. This gives structural support to the filter element and prevents straight axial flow through its center from inlet to outlet.
  • the blanking of the ends of the flow channels is formed by a hot melt plastic.
  • the-fluid system is shut down and disconnected at the inlet and outlet connections. Then the mounting holder 2.is opened by loosening the wing nuts and tie rods and the front cross bars are swung out* of the way. The filter unit 20 is then simply pulled forward out of the holder. A replacement filter unit 20 is then inserted, clamped in place, and connected to the liquid inlet and outlet lines.

Abstract

A liquid filter apparatus, for connection to inlet and outlet liquid lines, including a mounting holder (2) and a removable filter within the holder. The filter unit (20) includes bottom and top end caps (22, 26) with a core tube (46) and a concentric outer tube (30) extending between the end caps (22, 26). A filter element (40) between the core tube (46) and the outer tube stands on radial ribs (23) extending upward from the bottom end cap (22) and is spaced from the top end cap by similar radial ribs (23) extending downward from the top end cap (26), these ribs creating radial flow channels above and below the filter element (40). The filter element (40) is a wound spiral of filter material (43) and separator (41) forming a plurality of axial flow channels (42, 44). Some of these axial flow channels (42, 44) are open at the top to receive liquid from the top radial flow channel and closed at the bottom, and some of the axial flow channels (42, 44) are closed at the top and open at the bottom to discharge liquid into the bottom radial flow channel. Filter action is by radial flow, through the filter material (43) from the open-top channels (42) to the open-bottom channels (44). The holder (2) includes upper and lower mounting plates (4, 8) and tie rods (10) between them to releasably hold the unit together and to permit removal and replacement of the filter. Means (29) are provided to vent air from the system.

Description

LIQUID FILTER APPARATUS BACKGROUND OF THE INVENTION Field of the Invention
This invention relates to a disposable liquid filter supported by an open mounting holder allowing simple replacement of the filter. Description of the Prior Art
Most liquid filters are installed by the user in a steel housing which is a part of the filter and of the liquid path through it. Such a prior art housing typically has inlet and outlet pipe connections and is itself a pres¬ sure vessel with a heavy cover clamped in place to make the unit leak proof and to safely contain the liquid pressure. For some applications, for example, where the liquid pres- sure does not exceed 75 psi, it may be more convenient and less expensive to have a disposable filter unit in- its own plastic housing adapted for direct hose connection's at inlet and outlet.
The prior art includes U.S. Patents 3,529,726 to Keenan; 3,820,661 to Pages; and 4,505,816 to Wozniak et al. Keenan discloses a filter assembly including a tie rod mounting holder and filter unit, the filter unit being removable from the holder by loosening the tie rods. Pages discloses a filter assembly, also held together by tie rods, and including a filter element having a plurality of axial fluid channels. These channels in Pages are open at both ends for a continuous fluid flow in series from one to another. Wozniak et al. discloses a filter assembly having radial flow channels in one of its end caps. While these items of prior art variously relate to some of the elements ■ of this invention, i.e., tie rods, removable and replace¬ able filter unit, and radial flow end caps, they do not relate to the combination or the principle of operation of this invention. SUMMARY OF THE INVENTION
The present invention may be summarized as a liquid filter apparatus, for connection to inlet and outlet liquid lines, and including a mounting holder and a removable disposable filter unit mounted in the holder. The disposable filter unit includes bottom and top end caps, with a core tube plugged at both ends and a concen¬ tric outer tube sealed to and extending between the end caps. The top and bottom end caps and the outer tube are made of a plastic material for economy and disposability. A filter element between the core tube and the outer tube stands on radial ribs extending upward from the bottom end cap and is spaced from the top end cap by similar radial ribs extending downward from the top end cap, these ribs . creating radial flow channels above and below the filter element. The filter element is a wound spiral of a sandwich including a flat filter sheet material and a corrugated impermeable polymeric separator sheet, forming a plurality of axial flow channels. Some of these axial flow channels are open at the top to receive liquid from the top radial flow channel and closed at the bottom, and some of the axial flow channels are closed at the top and open at the bottom to discharge liquid into the bottom radial flow channel. Filter action is by radial flow, through the filter material, from the open-top' channels to the open- bottom channels. The mounting holder includes upper and lower mounting plates and tie rods between them to releas- ably hold the filter unit together and to permit easy removal and replacement of the filter unit. The mounting plates and tie rods give strength to the filter unit., preventing liquid pressure from blowing off the end caps. Means are provided to verityair from the filter unit. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a sectional elevation view of the filter and mounting holder of this invention.
Figure 2 is a top vie of the upper mounting holder of FIG. 1.
Figure 3 is a partial front view of the mounting holder of FIG. 2.
Figure 4 is a schematic top view, somewhat 'enlarged, of a filter element according to this invention. Figure 5 is a still further enlarged schematic detail of FIG. 4.
Figure 6 is a bottom view of the top end cap. Figure 7 is a top view of the bottom end cap. DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing, the mounting holder and filter of this invention are shown in combination, the mounting holder being generally indicated at 2 and the filter unit at 20. Mounting holder 2 includes an upper mounting plate 4 fastened to a stationary support means such as flanged brackets exemplified at 6, and a similar lower mounting plate 8 which hangs from upper plate 4 on four tie rods 10. Tie rods 10 include wing nuts 12 at their tops by which the assembly is tightened for normal operation and loosened for removal and replacement of the filter 20. Each of the mounting plates is somewhat "C" shaped, having an open aperture 14 facing forward of the apparatus (see also FIG. 2) . A pair of upper channel beam's or cross bars 16 extend across the top of upper plate 4, ' one extending -between the two tie rods 10 at the rear and one extending between the two tie rods 10 at the front." Similarly, a pair of lower channel beams or cross bars 18 extend across the bottom of lower plate 8, one extending between the two tie rods 10 at the rear and one extending between the two tie rods 10 at the front. Cross bars 16 and 18 bear on their respective upper and lower mounting plates by means of the tie rods 10 and wing nuts 12 pro¬ viding longitudinal strength to the mounting plates. Cross bars 16 and 18 in the front of the unit are mounted for rotation on one of the front tie rods so they can be swung open when the wing nuts are loosened to permit placement and removal of the filter 20. The upper front cross bar 16 includes depending heel piece 17 to fill the space of the open aperture 14 when the mounting holder is closed. A similar heel piece, not shown, is mounted atop the lower front cross bar 18 for the same purpose. This makes the mounting plate-heel combination flush at top and bottom. Thus, when the filter is in place and the mounting holder is clamped over it, the end surfaces of the top and bottom end caps are substantially in total contact with the flush mounting plate-heel combination at top and bottom. This prevents distortion of the filter and the consequent breaking of seals when hydraulic pressure is applied.
The filter 20 is an integral unit which fits into the mounting holder 2 and is laterally removable from it. Filter 20 includes a bottom end cap 22 (see also FIG. 7) having a central outlet port ιr0UT" which is adapted, as for example by pipe threads, for connection to an outlet liquid line. A similar top end cap 26 (see also FIG. 6) includes a central inlet port •■IN" which is also adapted, as for example by pipe threads, for connection to an inlet liquid line. Bottom end cap 22 includes a plurality of upstanding radial ribs 23 creating a plurality of radial outlet flow channels 24"and supporting the filter element 40. Top end cap 26 includes a plurality of depending radial ribs 27 creating a plurality of radial inlet flow channels 28 over the filter element 40. An outer cylindrical tube 30 fits * within peripheral flange 32 in the bottom end cap 22 and peripheral flange 34 in the top end cap 26. These connections between outer tube 30 and the bottom and top end caps 22 and 26 are sealed with a sealant such as an electro-magnetically actuated polypropylene adhesive sealer or similar suitable sealing composition so that the filter unit is liquid-tight. The end caps and the outer tube are all of a plastic material such as polypropylene for economy and disposability. A normally closed vent passage 29 is provided in the top end cap 26 to remove air or gases from the system as necessary. The sealing engagement of the bottom end cap 22 with the outer tube 30, and the sealing engagement of the top end cap 26 with the outer tube 30, are all represented by deposits 50 of sealant at the respective locations of connection.
A filter element 40 (see also FIG. 4) is a spiral wound roll of a sandwich including a flat filter sheet material 43, interleaved with a corrugated polymeric separator sheet 41 resting on the tops of upstanding*ribs 23 of the bottom end cap. The corrugations of the filter element provide spacing between successive layers of the wound roll, which spaces are axial flow channels for the liquid passing through the filter. Alternate axial flow channels 42 are blanked off at the bottom, while successive alternate axial flow channels 44 are blanked off at the top so that fluid enters at the top of the open-top channels 42 and leaves at the bottom of the open-bottom channels 44. Filter action is by way of radial flow, through the filter material 43, from the open-top channels 42 to the open- bottom channels 44 as indicated in FIG. 5. The filter element 40 is formed around a core tube 46 which is sealed at its ends by plugs 48. This gives structural support to the filter element and prevents straight axial flow through its center from inlet to outlet. The blanking of the ends of the flow channels is formed by a hot melt plastic.
When a filter unit is to be changed, the-fluid system is shut down and disconnected at the inlet and outlet connections. Then the mounting holder 2.is opened by loosening the wing nuts and tie rods and the front cross bars are swung out* of the way. The filter unit 20 is then simply pulled forward out of the holder. A replacement filter unit 20 is then inserted, clamped in place, and connected to the liquid inlet and outlet lines.

Claims

We claim :
1. A liquid filter apparatus for connection to inlet and outlet liquid lines and including a mounting holder and an integral filter unit removably mounted in said holder: said filter unit including: a. a bottom end cap having a central outlet port adapted for connection to an outlet liquid line and including a plurality of upstanding radial ribs forming radial outlet
.flow channelsr b. a cylindrical outer tube in sealing engage¬ ment with said bottom end cap and extending upwardly therefrom; c. a top end cap mounted atop* said outer tube and in sealing engagement therewith, said top end cap having a central inlet port adapted for connection to an inlet- liquid line and including a plurality of depending radial ribs forming radial inlet flow channels; d. a cylindrical filter element disposed within said outer tube between said end caps and spaced from said end caps by said radial ribs; said mounting holder including: e. a lower mounting plate adapted to support said bottom end cap and an upper mounting plate adapted to bear on said upper end cap, at least one of said mounting plates having an opening in one side thereof to permit the lateral insertion of said filter therein, one of said mounting plates being fixed to a stationary support means; and f. tie rods extending between said upper and lower mounting plates adapted for releasable clamping engagement to firmly hold said filter in place and to provide longitudinal strength to said filter apparatus.
2. A liquid filter apparatus as defined in Claim 1, further including means to vent air from said filter.
3. A liquid filter apparatus as defined in Claim 1, further including a central core tube around which said filter element, is disposed, said core tube being capped at its ends to prevent straight axial liquid flow rσ therethrough.
4. A liquid filter apparatus as defined in Claim 1, said mounting plates each having an opening in one side thereof to permit lateral insertion of said filter therein.
15 5. A liquid filter apparatus as defined in Claim 1 including means to effect a coplanar contact interface between said end caps and said mounting holder.
6. A liquid filter apparatus as defined in Claim 1 including means on said mounting holder to provide
20 a surface flush with said mounting plates for supporting contact with said end caps.
7. A liquid filter apparatus as defined in Claim 1 in which there are four of said tie rods, and further including upper cross bars extending between pairs
23. of said tie rods and lower cross bars extending between pairs of said tie rods, at least one of said cross bars including a heel for insertion into said opening of said mounting plate forming a flush surface therewith for contact with the contiguous one of said end caps. O 8. A liquid filter apparatus as defined in Claim 1 in which said filter element includes a porous filter material defining a plurality of axial flow channels, some of said axial flow channels being open at their tops to receive liquid from said radial inlet flow 5 channels and closed at their bottoms, and some of said axial flow channels being closed at their tops and open at their bottoms to discharge liquid into said radial outlet flow channels.
9. A liquid filter apparatus for connection to inlet and outlet liquid lines and including a mounting holder and a filter unit removably mounted in said holder: said mounting holder including upper and lower apertured mounting plates and a plurality of tie rods to releasably clamp said filter unit between said upper and lower plates; said filter unit including: a. top and bottom end caps each having a cen- 0 tral port for connection to one of said liquid lines and each, including a plurality of inwardly facing radial ribs forming radial flow channels; b.. a cylindrical outer tube between said end 5 caps and sealed therewith forming a liquid- tight filter housing; and c. a cylindrical filter element disposed within said housing and spaced from said end caps by said radial ribs, said* filter element 0 including a porous filter material defining a plurality of axial flow channels, a number of said axial flow channels being open at their tops to receive liquid from the radial flow channels communicating therewith and 5 closed at their bottoms, others of said axial flow channels being closed at their tops and open at their bottoms to discharge liquid into the radial flow channels com¬ municating therewith, whereby filter action o is by way of radial flow through said filter material from those axial flow channels with open tops to those axial flow channels with open bottoms.
10. A liquid filter apparatus as defined in 5 Claim 9, further including means to vent air from said filter.
11. A liquid filter apparatus as defined in Claim 9, further including a central core tube around which said filter element is disposed, said core tube being capped at its ends to prevent straight axial liquid flow therethrough.
12. A liquid filter apparatus as defined in Claim 9, said mounting plates each having an opening in one side thereof to permit lateral insertion of said filter therein.
13. A liquid filter apparatus as defined in Claim 9 including means to effect a coplanar contact interface between said end caps and said mounting holder.
14. A liquid filter apparatus as defined in Claim 9 including means on said mounting holder to provide a surface flush with said mounting plates for supporting contact with said end caps.
15. An integral liquid filter unit for removable insertion into a mounting holder, said filter unit including: a. top and bottom end caps each having a cen¬ tral port for-connection to one of said liquid lines and each including a plurality of inwardly facing radial ri'bs forming radial flow channels; b. a cylindrical outer tube between said end caps and sealed therewith forming a liquid- tight filter housing; and c. a cylindrical filter element disposed within said housing and spaced from said end caps by said radial ribs, said filter element including a porous filter material defining a plurality of axial flow channels, a number of said axial flow channels being open at their tops to receive liquid from the radial flow channels communicating therewith and closed at their bottoms, others of said axial flow channels being closed at their tops and open at their bottoms to discharge liquid into the radial flow channels com¬ municating therewith, whereby filter action is by way of radial flow through said filter material from those axial flow channels with cpen tops to those axial flow channels with open bottoms.
10
15
20
25
30
35
PCT/US1987/002842 1986-11-04 1987-10-29 Liquid filter apparatus WO1988003431A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92661586A 1986-11-04 1986-11-04
US926,615 1986-11-04

Publications (1)

Publication Number Publication Date
WO1988003431A1 true WO1988003431A1 (en) 1988-05-19

Family

ID=25453454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1987/002842 WO1988003431A1 (en) 1986-11-04 1987-10-29 Liquid filter apparatus

Country Status (2)

Country Link
AU (1) AU8326087A (en)
WO (1) WO1988003431A1 (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0581695A1 (en) * 1992-07-27 1994-02-02 Eastman Kodak Company Filter assembly including filter unit having deformable sealing end caps
EP0401329B1 (en) * 1988-12-14 1994-07-27 TRABOLD, Hermann Oil filter for internal combustion engines
WO1997040910A1 (en) * 1996-04-26 1997-11-06 Donaldson Company, Inc. Filtering device with corrugated and rolled filter media
WO1997040919A1 (en) * 1996-04-26 1997-11-06 Donaldson Company, Inc. Filter for a duct with a filter media inclined to the main flow direction
US6179890B1 (en) 1999-02-26 2001-01-30 Donaldson Company, Inc. Air cleaner having sealing arrangement between media arrangement and housing
DE10003993A1 (en) * 2000-01-29 2001-08-23 Bosch Gmbh Robert Filter insert for a liquid filter
US6669913B1 (en) 2000-03-09 2003-12-30 Fleetguard, Inc. Combination catalytic converter and filter
US6776814B2 (en) 2000-03-09 2004-08-17 Fleetguard, Inc. Dual section exhaust aftertreatment filter and method
US7211226B2 (en) 2000-03-09 2007-05-01 Fleetgaurd, Inc. Catalyst and filter combination
WO2008125475A1 (en) * 2007-04-11 2008-10-23 Mann+Hummel Gmbh Intake air filter
US8685128B2 (en) 2003-12-22 2014-04-01 Donaldson Company, Inc. Seal, arrangement for filter element; filter element assembly; and, methods
US8840699B2 (en) 2005-10-11 2014-09-23 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US8945268B2 (en) 2005-11-09 2015-02-03 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
US9089807B2 (en) 1999-02-26 2015-07-28 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
US9162172B2 (en) 2002-05-09 2015-10-20 Donaldson Company, Inc. Air filter having fluted filter media
US9283507B2 (en) 2004-04-30 2016-03-15 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US9555370B2 (en) 2007-09-07 2017-01-31 Donaldson Company, Inc. Air filter assembly; components thereof; and, methods
US20210060559A1 (en) * 2019-09-03 2021-03-04 Imagine Tf, Llc Rolled film with structures for fluid separation
US11679352B2 (en) 2004-04-30 2023-06-20 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050918A (en) * 1951-02-15 1954-01-12 Bosch Gmbh Robert Liquid filter
GB919898A (en) * 1960-07-25 1963-02-27 Parmatic Inc Filter unit and filter cartridge therefor
US3529726A (en) * 1969-09-15 1970-09-22 Gordon J Keenan Portable water filter unit
FR2148726A5 (en) * 1971-07-30 1973-03-23 Herfilco Cylindrical filter element - with spaced,coaxial spirals of filter material,esp for air cleaners
US4310419A (en) * 1980-03-19 1982-01-12 Nippon Soken, Inc. Filter element for liquid straining filter
WO1983001582A1 (en) * 1981-11-02 1983-05-11 Donaldson Co Inc Fluid filtering device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050918A (en) * 1951-02-15 1954-01-12 Bosch Gmbh Robert Liquid filter
GB919898A (en) * 1960-07-25 1963-02-27 Parmatic Inc Filter unit and filter cartridge therefor
US3529726A (en) * 1969-09-15 1970-09-22 Gordon J Keenan Portable water filter unit
FR2148726A5 (en) * 1971-07-30 1973-03-23 Herfilco Cylindrical filter element - with spaced,coaxial spirals of filter material,esp for air cleaners
US4310419A (en) * 1980-03-19 1982-01-12 Nippon Soken, Inc. Filter element for liquid straining filter
WO1983001582A1 (en) * 1981-11-02 1983-05-11 Donaldson Co Inc Fluid filtering device

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401329B1 (en) * 1988-12-14 1994-07-27 TRABOLD, Hermann Oil filter for internal combustion engines
EP0581695A1 (en) * 1992-07-27 1994-02-02 Eastman Kodak Company Filter assembly including filter unit having deformable sealing end caps
WO1997040910A1 (en) * 1996-04-26 1997-11-06 Donaldson Company, Inc. Filtering device with corrugated and rolled filter media
WO1997040919A1 (en) * 1996-04-26 1997-11-06 Donaldson Company, Inc. Filter for a duct with a filter media inclined to the main flow direction
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
US6179890B1 (en) 1999-02-26 2001-01-30 Donaldson Company, Inc. Air cleaner having sealing arrangement between media arrangement and housing
US9089807B2 (en) 1999-02-26 2015-07-28 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
US9707503B2 (en) 1999-02-26 2017-07-18 Donaldson Company, Inc. Filter arrangement; sealing system; and methods
DE10003993A1 (en) * 2000-01-29 2001-08-23 Bosch Gmbh Robert Filter insert for a liquid filter
US6669913B1 (en) 2000-03-09 2003-12-30 Fleetguard, Inc. Combination catalytic converter and filter
US6776814B2 (en) 2000-03-09 2004-08-17 Fleetguard, Inc. Dual section exhaust aftertreatment filter and method
US7211226B2 (en) 2000-03-09 2007-05-01 Fleetgaurd, Inc. Catalyst and filter combination
US10556202B2 (en) 2002-05-09 2020-02-11 Donaldson Company, Inc. Air filter having fluted filter media
US9162172B2 (en) 2002-05-09 2015-10-20 Donaldson Company, Inc. Air filter having fluted filter media
US11185810B2 (en) 2002-05-09 2021-11-30 Donaldson Company, Inc. Air filter having fluted filter media
US9782713B2 (en) 2002-05-09 2017-10-10 Donaldson Company, Inc. Air filter having fluted filter media
US8685128B2 (en) 2003-12-22 2014-04-01 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
US10279303B2 (en) 2003-12-22 2019-05-07 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
US10252206B2 (en) 2004-04-30 2019-04-09 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US10343101B2 (en) 2004-04-30 2019-07-09 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US11123673B2 (en) 2004-04-30 2021-09-21 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US9283507B2 (en) 2004-04-30 2016-03-15 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US11679352B2 (en) 2004-04-30 2023-06-20 Donaldson Company, Inc. Filter arrangements; housings; assemblies; and, methods
US9399972B2 (en) 2005-10-11 2016-07-26 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US11786857B2 (en) 2005-10-11 2023-10-17 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US10427083B2 (en) 2005-10-11 2019-10-01 Donaldson Company, Inc. Air filter arrangement; assembly; and methods
US11173442B2 (en) 2005-10-11 2021-11-16 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US8840699B2 (en) 2005-10-11 2014-09-23 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
US10507423B2 (en) 2005-11-09 2019-12-17 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
US9718021B2 (en) 2005-11-09 2017-08-01 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
US11117085B2 (en) 2005-11-09 2021-09-14 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
US8945268B2 (en) 2005-11-09 2015-02-03 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
WO2008125475A1 (en) * 2007-04-11 2008-10-23 Mann+Hummel Gmbh Intake air filter
US9555370B2 (en) 2007-09-07 2017-01-31 Donaldson Company, Inc. Air filter assembly; components thereof; and, methods
US10422306B2 (en) 2007-09-07 2019-09-24 Donaldson Company, Inc. Air filter assembly; components thereof; and, methods
WO2021045963A1 (en) * 2019-09-03 2021-03-11 Imagine Tf, Llc Rolled film with structures for fluid separation
US20210060559A1 (en) * 2019-09-03 2021-03-04 Imagine Tf, Llc Rolled film with structures for fluid separation
US11691149B2 (en) * 2019-09-03 2023-07-04 Imagine Tf, Llc Rolled film with structures for fluid separation

Also Published As

Publication number Publication date
AU8326087A (en) 1988-06-01

Similar Documents

Publication Publication Date Title
WO1988003431A1 (en) Liquid filter apparatus
US4824564A (en) Dry sump liquid filter
US4713174A (en) Mounting arrangement for a tube-type filter element
US3986960A (en) Fluid filter
JP3260498B2 (en) Fluid mixture separation device forming plate module
CN110312561B (en) Device for separating solid particles from liquids and gases
GB2176126A (en) Filter
US4221663A (en) Multiple plate filter apparatus
US3720322A (en) Upflow cartridge filter apparatus
US3872015A (en) Apparatus for separating fluids into two fractions by means of semipermeable membranes
GB2236962A (en) Filter stack for cross-flow filter
US4455227A (en) Combination filter heat exchanger
US5037461A (en) Filtration apparatus
US3443697A (en) Plural,inverted,cup-shaped filter elements
US4801382A (en) Filter means with a segmental construction
JP2593853B2 (en) Liquid treatment equipment
US4919805A (en) Vertical leaf filter flush
AU718840B2 (en) Filter element
US4895683A (en) Apparatus for mass transferring between phases different from each other
US2737300A (en) Wash-off plate filter apparatus
GB2130111A (en) Filtration apparatus
JP4664981B2 (en) Filter for liquid and filtration device including the same
US4329228A (en) Filter plate for horizontal plate filter
US890989A (en) Filter.
RU2095317C1 (en) Filter for cleaning liquids

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT NL