Patent US5105152A successfully refreshed from Google Patents.
Patent US3130746A successfully refreshed from Google Patents.
US3130746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-directional check valves
Assignee: Individual
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Filing: 1962-05-15
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Granted: 1964-04-28
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Charles G Viner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:26
CPC Classifications
A; A62; A62B; A62B13/00; F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/067; F16K2200/00; F16K2200/30; F16K2200/302; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7771; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A VALVE CONSTRUCTION OF THE CHARACTER DESCRIBED COMPRISING AN OPEN CHAMBER HAVING AN UPPER WALL PORTION AND A LOWER DOWNWARDLY AND INWARDLY TAPERING FUNNELSHAPED PORTION HAVING OUTER EDGES IN SEALED RELATION WITH EACH OTHER AND HAVING SUBSTANTIALLY VERTICALLY DISPOSED PASSAGEWAYS EXTENDING THERETHROUGH, AN UPWARDLY OPENING CUP-SHAPED VALVE MEMBER ALIGNED WITH ONE OF SAID PASSAGEWAYS AND HAVING A SUBSTANTIALLY HORIZONTALLY DISPOSED UPPER EDGE PORTION, SAID VALVE MEMBER BEING SLIDABLY SUPPORTED INTERNALLY OF SAID CHAMBER FOR MOVEMENT TOWARD AND AWAY FROM SELECTED AREAS OF SAID RESPECTIVE WALL PORTIONS, SAID CUP-SHAPED MEMBER HAVING RESILIENT MEANS SECURED TO THE UPPER EDGE THEREOF AND BEING SO
Claim 2
Dependent Claim
101 words
A VALVE CONSTRUCTION OF THE CHARACTER DESCRIBED COMPRISING AN OPEN CHAMBER HAVING AN UPPER WALL PORTION AND A LOWER DOWNWARDLY AND INWARDLY TAPERING FUNNELSHAPED PORTION HAVING OUTER EDGES IN SEALED RELATION WITH EACH OTHER AND HAVING SUBSTANTIALLY VERTICALLY DISPOSED PASSAGEWAYS EXTENDING THERETHROUGH, AN UPWARDLY OPENING CUP-SHAPED VALVE MEMBER ALIGNED WITH ONE OF SAID PASSAGEWAYS AND HAVING A SUBSTANTIALLY HORIZONTALLY DISPOSED UPPER EDGE PORTION, SAID VALVE MEMBER BEING SLIDABLY SUPPORTED INTERNALLY OF SAID CHAMBER FOR MOVEMENT TOWARD AND AWAY FROM SELECTED AREAS OF SAID RESPECTIVE WALL PORTIONS, SAID CUP-SHAPED MEMBER HAVING RESILIENT MEANS SECURED TO THE UPPER EDGE THEREOF AND BEING SO
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |