US6179891B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter arrangement and a method for its manufacture
Assignee: Carl Freudenberg KG
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Filing: 1998-08-04
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Granted: 2001-01-30
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Expires: 2018-08-04
Abstract
Abstract A filter arrangement made up of an accordion fold pack which is sealingly arranged in a housing. The housing is deep drawn in one piece from a polymeric material sheet. A limit stop is punched out of the base of the housing. A seal surrounds the accordion fold pack and seals against the housing.
Inventors
- 👤 Jörgen Knudsen
- 👤 Wolfgang Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:24
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0001; B01D46/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A filter arrangement, comprising: an accordion fold pack; a seal directly in contact with and surrounding the entire height of the exterior side perimeter of the accordion fold pack; and a housing, the accordion fold pack being arranged and sealed against the housing with the seal, the housing is deep drawn in one piece.
Claim 2
Dependent Claim
54 words
A filter arrangement, comprising: an accordion fold pack; a seal directly in contact with and surrounding the entire height of the exterior side perimeter of the accordion fold pack; and a housing, the accordion fold pack being arranged and sealed against the housing with the seal, the housing is deep drawn in one piece.
Claim 3
Dependent Claim
16 words
The filter arrangement of claim 1 , wherein: the housing is made of a polymeric material.
Claim 4
Dependent Claim
21 words
The filter arrangement of claim 1 wherein the seal contacts the housing with elastic pre-stress in a sealing but non-adhesive manner.
Claim 5
Dependent Claim
31 words
The filter arrangement of claim 1 , wherein: the housing includes a limit stop at an outlet end of the housing, the limit stop protruding towards an inside of the housing.
Claim 6
Dependent Claim
16 words
The filter arrangement of claim 1 , wherein: the seal is made of a nonwoven fabric.
Claim 7
Dependent Claim
18 words
The filter arrangement of claim 1 , wherein: the accordion fold pack is made of a nonwoven fabric.
Claim 8
Dependent Claim
18 words
The filter arrangement of claim 1 , wherein: the accordion fold pack and the seal are adhesively joined.
Claim 9
Independent Claim
86 words
A method for manufacturing a filter arrangement comprising: deep-drawing a sheet of polymeric to produce a housing having essentially a pot-shaped cross section; punching out a portion of a base of the housing to create a limit stop; surrounding the entire height of the exterior side perimeter of an accordion fold pack with a seal directly in contact with the entire height of the exterior side perimeter of the accordion fold pack; and inserting the accordion fold pack into the housing down to the limit stop.
Claim 10
Independent Claim
86 words
A method for manufacturing a filter arrangement comprising: deep-drawing a sheet of polymeric to produce a housing having essentially a pot-shaped cross section; punching out a portion of a base of the housing to create a limit stop; surrounding the entire height of the exterior side perimeter of an accordion fold pack with a seal directly in contact with the entire height of the exterior side perimeter of the accordion fold pack; and inserting the accordion fold pack into the housing down to the limit stop.
Claim 11
Dependent Claim
17 words
The method of claim 8 , further comprising: adhesively joining the accordion fold pack and the seal.
Claim 12
Independent Claim
86 words
A method for replacing a filter arrangement in a housing having a limit stop comprising: removing from the housing a first accordion fold pack having an exterior seal placed outside of and in direct contact with the entire height of the exterior side periphery of the first accordion fold pack; and, inserting into the housing a second accordion fold pack having an exterior seal placed outside of and in direct contact with the entire height of the exterior side periphery of the second accordion fold pack.
Claim 13
Independent Claim
86 words
A method for replacing a filter arrangement in a housing having a limit stop comprising: removing from the housing a first accordion fold pack having an exterior seal placed outside of and in direct contact with the entire height of the exterior side periphery of the first accordion fold pack; and, inserting into the housing a second accordion fold pack having an exterior seal placed outside of and in direct contact with the entire height of the exterior side periphery of the second accordion fold pack.
Claim 14
Dependent Claim
33 words
The method of claim 10 wherein the exterior seal placed around the exterior periphery of the second accordion fold pack is adhesively joined to the exterior periphery of the second accordion fold pack.
Claim 15
Dependent Claim
26 words
The method of claim 10 wherein the exterior seal placed around the exterior periphery of the second accordion fold pack is made from a nonwoven fabric.
Claim 16
Dependent Claim
32 words
The method of claim 10 wherein the exterior seal placed around the exterior periphery of the second accordion fold pack contacts the housing with elastic pre-stress in a sealing but non-adhesive manner.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-01-30 | 2004-07-31 | 2005-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-01-30 | 2008-07-31 | 2009-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-01-30 | 2012-07-31 | 2013-01-30 | $7700.00 | Window Closed / Lapsed |