Patent US3591945A successfully refreshed from Google Patents.
US3591945A
Expired / Lapsed
US
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Engine air filter unit
Assignee: Individual
•
Filing: 1969-03-27
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Granted: 1971-07-13
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Expires: 1989-03-27
Abstract
Abstract A transparent component or cover for the air intake filters of internal combustion engines positioned to reveal working parts and operation of carburetors, etc. Inspection and servicing or replacement of the filter element and/or carburetor components is facilitated by configurations in which the transparent component is removable from the filter unit body. Seals are provided between the transparent component, the filter element and filter unit body for efficient useage.
Inventors
- 👤 Charles Eisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
An automotive-type air filter unit for use with carburetors and the like on internal combustion engine systems comprising a filter unit body mounted on the carburetor and adjacent operatively working parts of said engine system, and a transparent cover plate on said filter unit body positioned in proximity to the working parts of the engine system whereby such parts may be observed through said cover plate.
Claim 2
Dependent Claim
66 words
An automotive-type air filter unit for use with carburetors and the like on internal combustion engine systems comprising a filter unit body mounted on the carburetor and adjacent operatively working parts of said engine system, and a transparent cover plate on said filter unit body positioned in proximity to the working parts of the engine system whereby such parts may be observed through said cover plate.
Claim 3
Dependent Claim
31 words
Structure as set forth in claim 1 and further comprising a filter element disposed in said filter unit adjacent said cover plate whereby air-transmitting surfaces of the filter may be observed.
Claim 4
Dependent Claim
63 words
Structure as set forth in claim 2 wherein said cover plate is removable and is of a size larger than said filter element with air seal surfaces of said filter engaged by said cover plate whereby said seal surfaces may be observed through said cover plate and/or the filter element may be removed from said filter unit after removal of the cover plate.
Claim 5
Dependent Claim
62 words
Structure as set forth in claim 2 wherein said filter unit body is provided with an access opening and said access opening, filter element and cover plate are cooperatively disposed whereby light from a light source introduced through said access opening will be transmitted by air-transmitting surfaces of said filter element for inspection pUrposes to be observed through said transparent cover plate.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
FR1147736A
Cited
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Cited
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |