US3785129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin-on air filter
Assignee: Purolator Courier Corp
•
Filing: 1971-11-01
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Granted: 1974-01-15
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Expires: 1991-11-01
Abstract
Abstract A spin-on air filter has a casing and end cap forming opposing seats, and a pleated paper annular filter element has its ends closed by these seats to provide for radial air flow through the element.
Inventors
- 👤 C Szmutko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:26
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/127; B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/2414; B01D46/52; B01D46/521; B01D46/523; F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; B01D2279/00; B01D2279/60; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
197 words
A spin-on air filter comprising a cylindrical casing having a closed end and an open end, a circular end cap for said open end and having a central air outlet and a peripheral annular series of air inlet ports and an annular internal seat between this outlet and these inlet ports, said closed end having an annular internal seat facing said end cap''s seat, and a pleated paper annular filter element positioned in said casing with its ends positioned on said seats; and in which said element''s ends are sealed with said seats by cement, the peripheries of said casing''s open end and of said end cap are interconnected by a mechanical inter-lock seam, said outlet is threaded to screw on a threaded air intake connection of an internal combustion engine, and said casing and said end cap are each an integral sheet metal unit with said seats formed as flat bottomed outwardly extending channels in the casing''s said closed end and said end cap respectively, said element''s ends being radially confined in said channels, tbe inner peripheral wall of the channel in said end cap extending inwardly towards said casing''s closed end to form said outlet.
Claim 2
Dependent Claim
197 words
A spin-on air filter comprising a cylindrical casing having a closed end and an open end, a circular end cap for said open end and having a central air outlet and a peripheral annular series of air inlet ports and an annular internal seat between this outlet and these inlet ports, said closed end having an annular internal seat facing said end cap''s seat, and a pleated paper annular filter element positioned in said casing with its ends positioned on said seats; and in which said element''s ends are sealed with said seats by cement, the peripheries of said casing''s open end and of said end cap are interconnected by a mechanical inter-lock seam, said outlet is threaded to screw on a threaded air intake connection of an internal combustion engine, and said casing and said end cap are each an integral sheet metal unit with said seats formed as flat bottomed outwardly extending channels in the casing''s said closed end and said end cap respectively, said element''s ends being radially confined in said channels, tbe inner peripheral wall of the channel in said end cap extending inwardly towards said casing''s closed end to form said outlet.
Claim 3
Dependent Claim
31 words
The filter of claim 1 in which a wire mesh cylindrical screen is positioned on the inside of said element and the ends of this screen are positioned on said seats.
References Cited (Backward Citations)
US1215974A
Cited
GB825299A
Cited
US2973832A
Cited
US3085383A
Cited
US3167416A
Cited
US3197029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |