Patent US5096581A successfully refreshed from Google Patents.
US5096581A
Expired / Lapsed
US
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Centrifugal oil filter
Assignee: Mann and Hummel GmbH
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Filing: 1989-06-30
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Granted: 1992-03-17
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Expires: 2009-06-30
Abstract
Abstract Centrifugal oil filters are described comprising a rotatable centrifugal cleaning cartridge, a shaft for rotation thereon, a co-operating member for connecting the filter assembly to a source of fluid to be cleaned, an outer casing member, a closure member for sealing one end of the casing member and a fluid drain conduit and wherein the centrifugal cleaning cartridge may be removed without removal of the outer casing member or disconnection of the fluid drain conduit.
Inventors
- 👤 Ronald J. Purvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:13
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/005; F; F01; F01M; F01M13/00; F01M13/04; F01M2013/0422; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
A centrifugal filter assembly for the separation of contaminants from engine or transmission oil, the assembly being immediately adjacent an engine or transmission and comprising a generally cylindrical outer casing having an open lower end and sealingly connected at the upper end to a cooperating member on said engine or on said transmission, from which cooperating member said assembly depends in a downward direction and through which cooperating member oil is admitted directly to said filter assembly, a fixed shaft in the outer casing and having thereon a disposable cleaning cartridge rotatable on said fixed shaft, said cartridge being substantially of fabricated sheet metal construction, a removable closure member for sealing said open lower end of the outer casing, and an oil drain on the lower side wall of the outer casing for returning oil to the engine or transmission whereby access to the disposable cartridge and removal and replacement thereof may be gained by removal of said closure member only with removal or disconnection of said outer casing or said oil drain.
Claim 2
Dependent Claim
173 words
A centrifugal filter assembly for the separation of contaminants from engine or transmission oil, the assembly being immediately adjacent an engine or transmission and comprising a generally cylindrical outer casing having an open lower end and sealingly connected at the upper end to a cooperating member on said engine or on said transmission, from which cooperating member said assembly depends in a downward direction and through which cooperating member oil is admitted directly to said filter assembly, a fixed shaft in the outer casing and having thereon a disposable cleaning cartridge rotatable on said fixed shaft, said cartridge being substantially of fabricated sheet metal construction, a removable closure member for sealing said open lower end of the outer casing, and an oil drain on the lower side wall of the outer casing for returning oil to the engine or transmission whereby access to the disposable cartridge and removal and replacement thereof may be gained by removal of said closure member only with removal or disconnection of said outer casing or said oil drain.
Claim 3
Dependent Claim
19 words
A filter assembly according to claim 1 wherein said oil drain is connected directly to the engine or transmission.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |