Patent US3477764A successfully refreshed from Google Patents.
Patent US3241805A successfully refreshed from Google Patents.
US3241805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Powers Regulator Co
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Filing: 1962-10-23
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Granted: 1966-03-22
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/48; F16K1/482; F16K31/00; F16K31/12; F16K31/126; F16K31/1262
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A CONTROL VALVE COMPRISING: A MEMBER DEFINING A VALVE SEAT; A VALVE MEMBER COOPERATIVE WITH SAID VALVE SEAT AND HAVING A RESILIENT SEATING SURFACE ON ONE SIDE FOR SEALING SAID VALVE SEAT WHEN SAID VALVE MEMBER IS SEATED THEREON, SAID VALVE MEMBER HAVING ON ITS SIDE OPPOSITE FROM SAID RESILIENT SEATING SURFACE A CONCAVE DRIVE THRUST RECEIVING SURFACE IN THE FORM OF A SPHERICAL SECTOR; MEANS FOR DRIVING SAID VALVE MEMBER; A VALVE STEM CONNECTING SAID VALVE MEMBER AND SAID MEANS FOR DRIVING SAID MEMBER, SAID VALVE STEM HAVING A CONVEX DRIVE THRUST TRANSMITTING SURFACE IN THE FORM OF A SPHERICAL SECTOR AND IN FACE TO FACE ENGAGING RELATIONSHIP WITH SAID CONCAVE SURFACE, SAID CONVEX SURFACE HAVING A LARGER RADIUS OF CURVATURE THAN SAID CONCAVE SURFACE SUCH THAT SAID CONVEX SURFACE IS ADAPTED TO ENGAGE IN RING-TYPE CONTACT WITH SAID CONCAVE SURFACE, SAID CONVEX SURFACE HAVING ITS CENTER OF RADIUS DISPOSED AN EXTENDED DISTANCE FROM THE
Claim 2
Dependent Claim
156 words
A CONTROL VALVE COMPRISING: A MEMBER DEFINING A VALVE SEAT; A VALVE MEMBER COOPERATIVE WITH SAID VALVE SEAT AND HAVING A RESILIENT SEATING SURFACE ON ONE SIDE FOR SEALING SAID VALVE SEAT WHEN SAID VALVE MEMBER IS SEATED THEREON, SAID VALVE MEMBER HAVING ON ITS SIDE OPPOSITE FROM SAID RESILIENT SEATING SURFACE A CONCAVE DRIVE THRUST RECEIVING SURFACE IN THE FORM OF A SPHERICAL SECTOR; MEANS FOR DRIVING SAID VALVE MEMBER; A VALVE STEM CONNECTING SAID VALVE MEMBER AND SAID MEANS FOR DRIVING SAID MEMBER, SAID VALVE STEM HAVING A CONVEX DRIVE THRUST TRANSMITTING SURFACE IN THE FORM OF A SPHERICAL SECTOR AND IN FACE TO FACE ENGAGING RELATIONSHIP WITH SAID CONCAVE SURFACE, SAID CONVEX SURFACE HAVING A LARGER RADIUS OF CURVATURE THAN SAID CONCAVE SURFACE SUCH THAT SAID CONVEX SURFACE IS ADAPTED TO ENGAGE IN RING-TYPE CONTACT WITH SAID CONCAVE SURFACE, SAID CONVEX SURFACE HAVING ITS CENTER OF RADIUS DISPOSED AN EXTENDED DISTANCE FROM THE
References Cited (Backward Citations)
US1695452A
Cited
US1891374A
Cited
US1950120A
Cited
US2479688A
Cited
GB848682A
Cited
US2925987A
Cited
US3030977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |