CA2518603A1 - Pleated filter assembly with replaceable filter media - Google Patents

Pleated filter assembly with replaceable filter media Download PDF

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Publication number
CA2518603A1
CA2518603A1 CA002518603A CA2518603A CA2518603A1 CA 2518603 A1 CA2518603 A1 CA 2518603A1 CA 002518603 A CA002518603 A CA 002518603A CA 2518603 A CA2518603 A CA 2518603A CA 2518603 A1 CA2518603 A1 CA 2518603A1
Authority
CA
Canada
Prior art keywords
sheet
filter
spaced
frame
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
CA002518603A
Other languages
French (fr)
Other versions
CA2518603C (en
Inventor
James O. Kubokawa
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
3M Innovative Properties Company
James O. Kubokawa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32926604&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2518603(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 3M Innovative Properties Company, James O. Kubokawa filed Critical 3M Innovative Properties Company
Publication of CA2518603A1 publication Critical patent/CA2518603A1/en
Application granted granted Critical
Publication of CA2518603C publication Critical patent/CA2518603C/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
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • 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
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/203—Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
    • 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 including a frame having a through passageway between front and rear surfaces surrounded by a perimeter portion; and a filter element including a sheet of flexible filter media with longitudinal attachment strips at opposite ends and extending at about a right angle to opposite edges of the sheet. Structure on the frame receives and positions the filter element with the sheet of filter media extending across the passageway with an inlet surface of the sheet facing the same direction as the front surface of the frame and with the attachment strips of the filter element extending along opposite end parts of the perimeter portion. The structure includes first and second generally parallel spaced linear abutments extending along the perimeter portion between its end parts and laying along the opposite edges of the sheet of filter material, and spaced first and second projections on each of the end parts of said frame engaged in first and second openings on a different one of the attachment strips. The first projection at the first end part is spaced the same first distance from the first linear abutment as the first projection at the second end part is spaced from the second linear abutment, and the second projection at said first end part is spaced the same second distance from the second linear abutment as the second projection at the second end is spaced from the first linear abutment. Those first and second distances are different so that the filter element can be mounted on the frame with either of the attachment strips engaged with the projections at either of the end parts while the filter element can only be mounted on the frame with the inlet surface of the sheet facing the same direction as the front surface of the frame.

Claims (16)

1. A filter assembly including:
a stiff frame having front and rear major surfaces, comprising a perimeter portion defining the perimeters of said surfaces and having opposite first and second end parts, said frame having a through passageway between said front and rear surfaces surrounded by said perimeter portion;
a filter element comprising a sheet of flexible filter media having opposite major inlet and outlet side surfaces, opposite ends, and opposite generally parallel edges extending between said opposite ends, an end portion of said sheet at each of said ends extends at about a right angle to said opposite edges and has structure defining spaced first and second through openings; and structure on said frame for receiving and positioning said filter element with said sheet of filter media extending across said passageway with said inlet surface of said sheet facing the same direction as said front surface of said frame and with said end portions of said filter element extending along said opposite end parts of said perimeter portion, said structure on said frame including first and second generally parallel spaced linear abutments extending along said perimeter portion between said end parts and laying along said opposite edges of said sheet of filter material, and spaced first and second projections on each of said end parts of said frame engaged in the first and second openings at a different one of the ends of said sheet of filter material;
said first projection at said first end part being spaced the same first distance from said first linear abutment in a direction normal to said abutments as said first projection at said second end part is spaced from said second linear abutment in a direction normal to said abutments, and said second projection at said first end part being spaced the same second distance from said second linear abutment in a direction normal to said abutments as said second projection at said second end is spaced from said first linear abutment in a direction normal to said abutments; and said first and second distances being different so that said filter element can be mounted on said frame with the structure at either of the ends of the sheet of filter material engaged with the projections at either of the end parts of the frame while the filter element can only be mounted on the frame with said inlet surface of said sheet facing the same direction as said front surface of said frame.
2. A filter assembly according to claim 1, wherein said frame comprises a base portion providing said structure on the frame for receiving and positioning said filter element, and a cover portion adapted to be moved relative to said base portion between an open position spaced from said structure for receiving and positioning said sheet of filter media to afford positioning said sheet of filter media on or removing said sheet of filter medial from said structure for receiving and positioning said sheet of filter media, and a closed position retaining said filter element on said structure for receiving and positioning said sheet of filter media.
3. A filter assembly according to claim 2, wherein said base and cover portions include corresponding opposite first and second side edges, a hinge connects said second edges and affords relative movement of said base and cover between said closed position at which said first side edges are closely adjacent and an open position wherein said first side edges are spaced apart to allow the filter element to be inserted into or removed from the frame, and said filter assembly includes a latch for releasably attaching said base and cover portions in said closed position.
4. A filter assembly according to claim 1, wherein said filter element includes two elongate attachment strips with each attachment strip attached along a different one of said end portions of said sheet of filter media, said attachment strips providing at least a portion of said structure defining said spaced first and second openings.
5. A filter assembly according to claim 1, wherein said sheet of filter media in said filter element provides said structure defining said spaced first and second openings.
6. A filter assembly according to claim 1, wherein said base portion includes a plurality of generally parallel equally spaced ribs extending at right angles to said linear abutments, said filter media has a plurality of pleats, each pleat including a fold line defining a pleat tip and a pair of adjacent panels, said adjacent panels being received between said ribs and said pleats being supported on said ribs at said pleat tips.
7. A filter assembly according to claim 6, wherein said filter element includes a flexible spacing structure between said pleat tips to space said pleat tips at maximum distances generally corresponding to the spacing between said ribs, said spacing structure having openings that allow air to readily flow through said spacing structure.
8. A filter assembly according to claim 6, wherein said sheet of filter media has a Gurley stiffness of less than 100 milligrams.
9. A filter assembly according to claim 1, wherein said projections are generally cylindrical and each have a plurality of equally spaced radially projecting axially extending ribs that will press into the structures along the end portions of the sheet of filter media when they are pressed over the projections to help retain said structures around the projections.
10. A filter element for use in a reusable frame to form a filter assembly, said filter element comprising a sheet of flexible filter media having opposite major inlet and outlet side surfaces, opposite ends, and opposite generally parallel edges extending between said opposite ends, an end portion of said sheet at each of said ends extends at about a right angle to said opposite edges and has structure defining spaced first and second openings;
the first opening at the first end of the sheet being spaced the same first distance from the first edge of said sheet in a direction normal to said edges as the first opening at the second end of the sheet is spaced from the second edge of said sheet in a direction normal to said edges, and the second opening at the first end of the sheet being spaced the same second distance from the second edge of said sheet in a direction normal to said edges as the second opening at the second end of the sheet is spaced from the first edge of said sheet in a direction normal to said edges, said first and second distances being different so that the filter element can be mounted on a frame with said structure at either of the ends of the sheet of filter media engaged with projections at corresponding positions on a frame with the projections in the openings at either of two opposite the end parts of the frame, while the filter element can only be mounted on the frame with the inlet surface of the sheet facing the same direction as a front surface of the frame.
11. A filter element according to claim 10, wherein said filter element includes two elongate attachment strips with each attachment strip attached along a different one of said end portions of said sheet of filter media, said attachment strips providing at least a portion of said structure defining said spaced first and second openings.
12. A filter element according to claim 10, wherein said sheet of filter media in said filter element provides said structure defining said spaced first and second openings.
13. A filter element according to claim 10, wherein said sheet of filter media has a plurality of pleats, each pleat including a fold line defining a pleat tip and a pair of adjacent panels.
14. A filter element according to claim 10, wherein said filter element includes a flexible spacing structure between said pleat tips that can space said pleat tips at maximum distances.
15. A filter element according to claim 10, wherein said filter media has a Gurley stiffness of less than 100 milligrams.
16. A filter element according to claim 10, wherein said sheet of filter media is planer.
CA2518603A 2003-03-04 2004-02-04 Pleated filter assembly with replaceable filter media Expired - Fee Related CA2518603C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/379,069 2003-03-04
US10/379,069 US6843820B2 (en) 2003-03-04 2003-03-04 Filter assembly
PCT/US2004/003251 WO2004078304A2 (en) 2003-03-04 2004-02-04 Filter assembly

Publications (2)

Publication Number Publication Date
CA2518603A1 true CA2518603A1 (en) 2004-09-16
CA2518603C CA2518603C (en) 2011-11-01

Family

ID=32926604

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2518603A Expired - Fee Related CA2518603C (en) 2003-03-04 2004-02-04 Pleated filter assembly with replaceable filter media

Country Status (3)

Country Link
US (1) US6843820B2 (en)
CA (1) CA2518603C (en)
WO (1) WO2004078304A2 (en)

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US7037354B1 (en) * 2002-11-22 2006-05-02 Anthony Dimicelli Expandable air filtration apparatus
US7169202B2 (en) * 2003-12-24 2007-01-30 3M Innovative Properties Company Filter assembly
US7150774B2 (en) * 2003-12-24 2006-12-19 3M Innovative Properties Company Self-spacing pleated filter insert
US20050252075A1 (en) * 2004-05-11 2005-11-17 Blue Rhino Global Sourcing, Llc Wave shaped screen for insect trap
US7156891B2 (en) * 2004-09-10 2007-01-02 Filtration Group Incorporated Forced air system air filter
US7393272B2 (en) * 2004-12-29 2008-07-01 3M Innovative Properties Company Air filter assembly
US9036538B2 (en) * 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US7452396B2 (en) * 2006-03-01 2008-11-18 Honeywell International Inc. Collapsible auto expanding media filter
US20080066436A1 (en) * 2006-09-14 2008-03-20 Delta M Incorporated Air filter apparatus
US7674306B2 (en) * 2007-02-05 2010-03-09 Visteon Global Technologies, Inc. Multilayered long life filter using convoluted foam
US20080290244A1 (en) * 2007-05-25 2008-11-27 Albright John W Window Air Filter Apparatus and Method
US8241380B2 (en) * 2007-11-19 2012-08-14 Mary Lou Hoffer Air filter duct cover
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US20090183477A1 (en) * 2008-01-23 2009-07-23 Workman Roger L Air filter
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US8828111B2 (en) 2011-03-07 2014-09-09 Field Controls, Llc Collapsible filter
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WO2013139992A1 (en) * 2012-03-23 2013-09-26 Mann+Hummel Gmbh Filter element and air filter
JP2015192947A (en) * 2014-03-31 2015-11-05 キヤノン株式会社 Dust collection filter
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JP6659093B2 (en) * 2015-06-24 2020-03-04 キヤノン株式会社 Filter frame, filter assembly, and image forming apparatus
US10201773B2 (en) 2015-11-18 2019-02-12 Robert C. Zurmuehlen Filter retainer arrangement
JP6616709B2 (en) * 2016-02-23 2019-12-04 株式会社やまびこ Portable power work machine
US10232295B2 (en) 2016-03-15 2019-03-19 Filtration Group Llc Filter including support frame
US10213721B2 (en) * 2016-04-28 2019-02-26 Cory Elliott Air filter arrangement
CN106362514B (en) * 2016-11-14 2018-10-23 美埃（中国）环境净化有限公司 A kind of collocation wind power industry generating set ventilation filter device
JP2018083164A (en) * 2016-11-25 2018-05-31 キヤノン株式会社 Dust collection filter assembly of image formation apparatus
US10603616B1 (en) * 2017-08-24 2020-03-31 American Air Filter Company, Inc. Reusable filter frame
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USD950698S1 (en) * 2019-09-09 2022-05-03 Cleanair.Ai Corporation Filter assembly
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Also Published As

Publication number Publication date
CA2518603C (en) 2011-11-01
US20040172928A1 (en) 2004-09-09
WO2004078304A3 (en) 2004-12-16
WO2004078304A2 (en) 2004-09-16
US6843820B2 (en) 2005-01-18

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Effective date: 20200204