US4507203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element
Assignee: Donaldson Co Inc
•
Filing: 1983-03-14
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Granted: 1985-03-26
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Expires: 2003-03-14
Abstract
Abstract The present invention is directed to a filter element (10) retained between a retention cover (12) and a support (18). Filter element (10) is provided with an inner liner (24) longer than an outer liner (26). Inner liner (24) extends between retention cover (12) and support (18) to absorb substantially all the axial load created by the retention mechanism.
Inventors
- 👤 Gordon L. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:35
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0005; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D35/00; B01D35/30; B01D2201/00; B01D2201/04; B01D2201/0407; B01D2201/34; B01D2271/00; B01D2271/02; B01D2271/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A filter element for cleaning fluids, said filter element being compressed by an axial load with fastening means holding said filter element to a top surface of a support, said filter element comprising: a non-structural cylindrical filter medium having inner and outer sides; first and second caps at opposite ends of said filter medium, said first cap including a metallic retainer, said metallic retainer having a bottom surface; a structural member on a first side of said filter extending from the bottom surface of the metallic retainer to the top surface of said support, wherein said member carries a substantial portion of the axial load on said filter element.
Claim 2
Dependent Claim
109 words
A filter element for cleaning fluids, said filter element being compressed by an axial load with fastening means holding said filter element to a top surface of a support, said filter element comprising: a non-structural cylindrical filter medium having inner and outer sides; first and second caps at opposite ends of said filter medium, said first cap including a metallic retainer, said metallic retainer having a bottom surface; a structural member on a first side of said filter extending from the bottom surface of the metallic retainer to the top surface of said support, wherein said member carries a substantial portion of the axial load on said filter element.
Claim 3
Dependent Claim
33 words
A filter element in accordance with claim 1 including a liner for said medium, said liner being on a second side of said filter and being shorter in length than said structural member.
Claim 4
Dependent Claim
97 words
A filter element for cleaning fluids, said filter element being retained by fastening means to a support, said support having a top surface, said filter element comprising: a filter medium; first and second non-metallic caps at opposite ends of said filter medium; means for connecting said first cap to said fastening means, said connecting means having a bottom surface and; first and second liners at opposite sides of said filter medium, at least one of said liners being structurally rigid and extending between the top surface of said support and the bottom surface of said connecting means.
Claim 5
Dependent Claim
97 words
A filter element for cleaning fluids, said filter element being retained by fastening means to a support, said support having a top surface, said filter element comprising: a filter medium; first and second non-metallic caps at opposite ends of said filter medium; means for connecting said first cap to said fastening means, said connecting means having a bottom surface and; first and second liners at opposite sides of said filter medium, at least one of said liners being structurally rigid and extending between the top surface of said support and the bottom surface of said connecting means.
Claim 6
Dependent Claim
114 words
A filter element for cleaning fluids, said filter element being retained by fastening means to a support, said support having a top surface, said filter element comprising: a filter medium; first and second caps at opposite ends of said filter medium; a retention cover attached to said first cap, said cover having a bottom surface; a gasket attached to said second cap, said gasket being compressed by said fastening means against said support to form a seal; and means for controlling compression of said gasket thereby reducing gasket compression set, said compression controlling means including an incompressible member extending between the bottom surface of said retention cover and the top surface of said support.
Claim 7
Dependent Claim
114 words
A filter element for cleaning fluids, said filter element being retained by fastening means to a support, said support having a top surface, said filter element comprising: a filter medium; first and second caps at opposite ends of said filter medium; a retention cover attached to said first cap, said cover having a bottom surface; a gasket attached to said second cap, said gasket being compressed by said fastening means against said support to form a seal; and means for controlling compression of said gasket thereby reducing gasket compression set, said compression controlling means including an incompressible member extending between the bottom surface of said retention cover and the top surface of said support.
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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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |