Patent US3285014A successfully refreshed from Google Patents.
Patent US3335751A successfully refreshed from Google Patents.
US3335751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Individual
•
Filing: 1964-01-15
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Granted: 1967-08-15
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Expires: 1984-01-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Roy Forrest Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:00
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A CHECK VALVE COMPRISING: A CYLINDRICAL BODY DEFINING AN INLET END AND OUTLET END AND HAVING A VALVE SEAT ON SAID OUTLET END, A YOKE MEMBER MOVABLY DISPOSED WITHIN SAID BODY, YIELDING MEANS COOPERATING WITH SAID BODY AND YOKE MEMBER TO NORMALLY URGE SAID YOKE MEMBER TOWARD SAID INLET, SAID YOKE MEMBER INCLUDING A CENTER TRUNCATED CONE SHAPED PORTION AXIALLY DISPOSED RELATIVE TO SAID BODY AND HAVING ITS TRUNCATED END EXTENDING TOWARD SAID INLET END, SAID CENTER PORTION BEING PROVIDED WITH A THREADED BORE CONCENTRIC WITH THE AXIS OF SAID BODY, A DISK SHAPED CAP PROVIDED WITH AN AXIALLY PROJECTING THREADED SHANK HAVING A CONICAL END, SAID SHANK BEING THREADABLY ENGAGED IN SAID BORE SO THAT SAID CONICAL END EXTENDS THROUGH THE TRUNCATED END OF SAID CENTER PORTION WHEREBY SAID CENTER PORTION WITH SAID CAP ATTACHED BECOMES CONICAL IN SHAPE, AND SAID CAP WHEN ATTACHED TO SAID CENTER SECTION BEING NORMALLY IN SEALING ENGAGEMENT WITH SAID VALVE SEAT.
Claim 2
Dependent Claim
158 words
A CHECK VALVE COMPRISING: A CYLINDRICAL BODY DEFINING AN INLET END AND OUTLET END AND HAVING A VALVE SEAT ON SAID OUTLET END, A YOKE MEMBER MOVABLY DISPOSED WITHIN SAID BODY, YIELDING MEANS COOPERATING WITH SAID BODY AND YOKE MEMBER TO NORMALLY URGE SAID YOKE MEMBER TOWARD SAID INLET, SAID YOKE MEMBER INCLUDING A CENTER TRUNCATED CONE SHAPED PORTION AXIALLY DISPOSED RELATIVE TO SAID BODY AND HAVING ITS TRUNCATED END EXTENDING TOWARD SAID INLET END, SAID CENTER PORTION BEING PROVIDED WITH A THREADED BORE CONCENTRIC WITH THE AXIS OF SAID BODY, A DISK SHAPED CAP PROVIDED WITH AN AXIALLY PROJECTING THREADED SHANK HAVING A CONICAL END, SAID SHANK BEING THREADABLY ENGAGED IN SAID BORE SO THAT SAID CONICAL END EXTENDS THROUGH THE TRUNCATED END OF SAID CENTER PORTION WHEREBY SAID CENTER PORTION WITH SAID CAP ATTACHED BECOMES CONICAL IN SHAPE, AND SAID CAP WHEN ATTACHED TO SAID CENTER SECTION BEING NORMALLY IN SEALING ENGAGEMENT WITH SAID VALVE SEAT.
References Cited (Backward Citations)
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Cited
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Cited
US2956584A
Cited
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US3060961A
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |