CA2489370A1 - Filter assembly - Google Patents

Filter assembly Download PDF

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Publication number
CA2489370A1
CA2489370A1 CA002489370A CA2489370A CA2489370A1 CA 2489370 A1 CA2489370 A1 CA 2489370A1 CA 002489370 A CA002489370 A CA 002489370A CA 2489370 A CA2489370 A CA 2489370A CA 2489370 A1 CA2489370 A1 CA 2489370A1
Authority
CA
Canada
Prior art keywords
filter
filter assembly
frame
base
filter element
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.)
Granted
Application number
CA002489370A
Other languages
French (fr)
Other versions
CA2489370C (en
Inventor
James O. Kubokawa
Ben G. Rogowski
Thomas A. Tedham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2489370A1 publication Critical patent/CA2489370A1/en
Application granted granted Critical
Publication of CA2489370C publication Critical patent/CA2489370C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • 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
    • B01D46/88—Replacing filter elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/31—Filter frame

Abstract

A filter assembly includes a reusable filter frame and a collapsible and expandable filter element. The filter frame includes a base and a cover connected with the base. The base includes a plurality of longitudinal rails and a plurality of transverse ribs for supporting and spacing the filter element. The filter frame also includes means for securing the filter element to the frame and maintaining the filter element in its expanded condition. The filter element includes filter media having a plurality of pleats adapted to mesh with the ribs of the filter frame and a flexible spacing structure attached to the pleated media that provides the pleated media with uniform pleat spacing but allows the media to be collapsed to a compact form.

Claims (37)

1. A filter assembly comprising:
(a) a filter frame including a base having at least one longitudinal rail; and (b) a reversibly expandable self-supporting filter element removably arranged in said filter frame, said filter element comprising filter media having a plurality of pleats and a flexible spacing structure attached to said filter media, each pleat including a fold line defining a pleat tip and a pair of adjacent panels.
2. A filter assembly as defined in claim 1, wherein the length of said spacing structure between successive pleat tips is less than the length of a panel measured from one pleat tip to the next alternating pleat tip.
3. A filter assembly as defined in claim 1, further comprising a cover movably connected with said base, said cover including an opening for allowing air to flow through said filter element.
4. A filter assembly as defined in claim 3, wherein said base and said cover include corresponding first and second sides edges, said base and said cover second edges being hingably connected.
5. A filter assembly as defined in claim 4, wherein said base and said cover first sides edges are movable between a closed position wherein said first side edges are engaged to enclose the filter element in the frame and an open position wherein said first side edges are displaced to allow the filter element to be inserted into the frame.
6. A filter assembly as defined in claim 5, wherein said base and said cover first side edges include a latch to releasably connect said first side edges and maintain the frame in its closed condition.
7. A filter assembly as defined in claim 1, wherein said base includes a plurality of transverse ribs corresponding to the pleats in the filter media and said ribs mesh between the pleats in the filter media.
8. A filter assembly as defined in claim 7, wherein said ribs are equally spaced.
9. A filter assembly as defined in claim 8, wherein said longitudinal rail includes spacer portions corresponding to the shape of the filter pleats in the region of each rib.
10. A filter assembly as defined in claim 9, wherein said longitudinal rail and said ribs form a unitary grid structure.
11. A filter assembly as defined in claim 1, wherein said frame includes a securing mechanism arranged to retain ends of said filter element in said frame.
12. A filter assembly as defined in claim 1, wherein said securing mechanism includes projections on said base that mate with corresponding holes in said cover.
13. A filter assembly as defined in claim 12, wherein said base and said cover include associated first and second ends, and further wherein said base first and second ends each include a pair of spaced projections and said cover first and second ends each include a pair of aligned holes.
14. A filter assembly as defined in claim 13, wherein said frame is formed of a synthetic plastic material.
15. A filter assembly as defined in claim 1, wherein said frame has a depth of less than inches.
16. A filter assembly as defined in claim 15, wherein said frame has a width of less than 40 inches.
17. A filter assembly as defined in claim 16, wherein said frame has a height of less than 30 inches.
18. A filter assembly as defined in claim 1, wherein said frame includes a perimeter structure containing finger indentations to allow a user to manually grasp said frame.
19. A filter assembly as defined in claim 1, wherein said frame includes an air flow direction indicator for assisting the user in properly orienting the filter frame in an air duct.
20. A filter assembly as defined in claim 1, wherein said frame is for an air filter for a residential heating or cooling system.
21. A filter assembly as defined in claim 1, wherein said spacing structure is an open scrim formed of a synthetic plastic material.
22. A filter assembly as defined in claim 21, wherein said filter media has opposed inlet and outlet sides and said scrim is arranged along said inlet side.
23. A filter assembly as defined in claim 22, wherein said scrim is provided in the form of at least one strip arranged perpendicular to said fold line along an interior portion of said filter media.
24. A filter assembly as defined in claim 23, wherein the length of the spacing structure between successive pleat tips is equal, thereby providing uniform spacing of said pleat tips.
25. A filter assembly as defined in claim 24, wherein the length of the spacing structure between successive pleat tips is at least 5 millimeters.
26. A filter assembly as defined in claim 25, further comprising an attachment members along opposed first and second ends of said filter media for securing said filter element to said filter frame.
27. A filter assembly as defined in claim 26, wherein each said attachment member contains holes adapted to mate with respective projections on said filter frame.
28. A filter assembly as defined in claim 1, wherein said filter media has a Gurley stiffness of less than 100 milligrams.
29. A filter assembly comprising:
(a) a filter frame including a base having at least one longitudinal rail and a plurality of transverse ribs and a cover movably connected with said base;
and (b) a replaceable filter element removably arranged in said filter frame, said filter element comprising filter media having an inlet side, an outlet side, and an interior face region, said filter media further having a plurality of pleats adapted to mesh with said ribs and a flexible spacing structure attached to said filter media, each pleat including a fold line defining a pleat tip and a pair of adjacent panels.
30. A filter assembly as defined in claim 29, wherein the length of said spacing structure between successive pleat tips is less than the length of a panel measured from one pleat tip to the next alternating pleat tip.
31. A filter assembly as defined in claim 30, wherein the number of pleat openings in one face of said filter media corresponds to the number of ribs, and said filter element can be expanded and placed into said filter frame such that said pleat openings mesh with said ribs.
32. A filter assembly as defined in claim 29, wherein said spacing structure is inelastic.
33. A filter element as defined in claim 32, wherein said spacing structure contains openings to allow air to flow readily through said structure.
34. A filter element as defined in claim 33, wherein successive pleat tips define an attachment surface and said spacing structure is attached to said entire attachment surface.
35. A filter element as defined in claim 34, wherein said spacing structure is arranged along said filter media inlet side.
36. A filter element as defined in claim 35, wherein said spacing structure is an open scrim formed of a synthetic plastic material.
37. A filter element as defined in claim 29, further comprising attachment members along said opposed first and second ends of said filter media parallel to said fold lines for securing said filter element to the filter frame.
CA2489370A 2002-06-14 2003-04-30 Filter assembly Expired - Fee Related CA2489370C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/172,575 US6860916B2 (en) 2002-06-14 2002-06-14 Filter assembly
US10/172,575 2002-06-14
PCT/US2003/013325 WO2003105992A2 (en) 2002-06-14 2003-04-30 Filter assembly

Publications (2)

Publication Number Publication Date
CA2489370A1 true CA2489370A1 (en) 2003-12-24
CA2489370C CA2489370C (en) 2011-04-19

Family

ID=29733098

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2489370A Expired - Fee Related CA2489370C (en) 2002-06-14 2003-04-30 Filter assembly

Country Status (5)

Country Link
US (1) US6860916B2 (en)
AU (1) AU2003235475A1 (en)
CA (1) CA2489370C (en)
TW (1) TWI278340B (en)
WO (1) WO2003105992A2 (en)

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Also Published As

Publication number Publication date
US6860916B2 (en) 2005-03-01
AU2003235475A8 (en) 2003-12-31
AU2003235475A1 (en) 2003-12-31
WO2003105992A3 (en) 2004-03-18
CA2489370C (en) 2011-04-19
TW200404597A (en) 2004-04-01
WO2003105992A2 (en) 2003-12-24
TWI278340B (en) 2007-04-11
US20030230062A1 (en) 2003-12-18

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