US3331583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced shut-off valve
Assignee: Individual
•
Filing: 1966-06-23
•
Granted: 1967-07-18
•
Expires: 1986-06-23
Abstract
No abstract record available.
Inventors
- 👤 William J Backer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:18
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/122
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
A SHUT-OFF VALVE ASSEMBLY COMPRISING: A VALVE BODY HAVING AN INLET PASSAGE AND AN OUTLET PASSAGE, A VALVE SEAT CIRCUMSCRIBING SAID OUTLET PASSAGE, A VALVE MEMBER SHIFTABLY SUPPORTED IN SAID BODY FOR MOVEMENT IN OPPOSITE DIRECTIONS INTO AND OUT OF ENGAGEMENT WITH SAID SEAT, A PASSAGE EXTENDING THROUGH SAID VALVE MEMBER AND COMMUNICATING WITH SAID OUTLET PASSAGE WHEN SAID VALVE MEMBER IS ENGAGED WITH SAID SEAT AND WITH SAID INLET PASSAGE WHEN SAID VALVE MEMBER IS OUT OF ENGAGEMENT WITH SAID SEAT, AN ACTUATOR STEM CONNECTED TO SAID VALVE MEMBER AND HAVING A FREE END PROJECTING FROM SAID VALVE MEMBER, MEANS PROVIDING A PRESSURE CHAMBER AT SAID FREE END OF SAID STEM, SAID VALVE MEMBER HAVING OPPOSING END AREAS BOTH EXPOSED TO FLUID PRESSURE IN SAID OUTLET PASSAGE WHEN SAID MEMBER IS IN ENGAGEMENT WITH SAID SEAT AND WITH SAID INLET PASSAGE WHEN SAID MEMBER IS OUT OF EN-
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |