Patent US3647083A successfully refreshed from Google Patents.
US3647083A
Expired / Lapsed
US
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Slip-on filter structure
Assignee: Marvel Engineering Co
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Filing: 1970-04-16
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Granted: 1972-03-07
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Expires: 1990-04-16
Abstract
Abstract A filter assembly having a normally fixed core and manually replaceable filter elements.
Inventors
- 👤 Forest G Niccum
- 👤 Walter J Kudlaty
- 👤 Charles W Dauer
- 👤 Peter Heinrich Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:35
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/14; B01D29/00; B01D29/50; B01D29/52; B01D29/54; B01D35/00; B01D35/02; B01D35/027; B01D35/0273; B01D35/14; B01D35/147
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
148 words
A slip-on filter assembly comprising an elongated, hollow, tubular core having openings in its circumferential wall, a fitting configuration at one end of said core and formed and adapted for securing said core to a fixed structure, circumferential lands surrounding the external surface of said core at axially spaced points thereon, said openings being located between said lands, the opposite end of said core being closed, a filter element structure slidably received on and slidably removable from said core, said filter element structure having a length less than that of said core and seal elements carried by said filter element structure and sealingly engaging the circumferential external surfaces of said lands, said lands including ramp areas bordering said circumferential surfaces and inclined toward said core for initial contact by said seal elements, said filter element structure being out of contact with said core except through said seal elements.
Claim 2
Dependent Claim
148 words
A slip-on filter assembly comprising an elongated, hollow, tubular core having openings in its circumferential wall, a fitting configuration at one end of said core and formed and adapted for securing said core to a fixed structure, circumferential lands surrounding the external surface of said core at axially spaced points thereon, said openings being located between said lands, the opposite end of said core being closed, a filter element structure slidably received on and slidably removable from said core, said filter element structure having a length less than that of said core and seal elements carried by said filter element structure and sealingly engaging the circumferential external surfaces of said lands, said lands including ramp areas bordering said circumferential surfaces and inclined toward said core for initial contact by said seal elements, said filter element structure being out of contact with said core except through said seal elements.
Claim 3
Dependent Claim
37 words
The structure of claim 1 wherein said lands include a land at one end of said core, a land at the opposite end of said core and at least one land intermediate the ends of said core.
References Cited (Backward Citations)
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Cited
US3058592A
Cited
US3337056A
Cited
US3262565A
Cited
US3314542A
Cited
US3503511A
Cited
US3539009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |