US3272218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated valve
Assignee: FC Kingston Co
•
Filing: 1963-02-12
•
Granted: 1966-09-13
•
Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:28
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; F16K1/465; F16K31/00; F16K31/12; F16K31/36; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A FLUID PRESSURE ACTUATED VALVE WHICH MAINTAINS A PRESELECTED MODERATE DIFFERENTIAL PRESSURE WHEN CONNECTED TO A WIDE RANGE OF FLUID PRESSURES, SAID VALVE COMPRISING: A VALVE HOUSING HAVING A HOLLOW GENERALLY CYLINDRICAL INTERIOR; A FIRST PORT AND ASSOCIATED VALVE SEAT AT ONE END OF SAID CAVITY; A SECOND PORT AND ASSOCIATED VALVE SEAT AT THE OTHER END OF SAID CAVITY; A THIRD PORT IN COMMUNICATION WITH SAID CAVITY; MEANS FOR SELECTIVELY VARYING THE DISTANCE BETWEEN SAID FIRST AND SECOND VALVE SEATS SO THAT THE DIFFERENTIAL OPERATING PRESSURE OF SAID VALVE MAY BE VARIED; A VALVE MEMBER MOUNTED FOR AXIAL MOVEMENT WITHIN SAID CYLINDRICAL CAVITY BETWEEN A FIRST POSITION IN WHICH SAID VALVE MEMBER SEALIGNLY ENGAGES SAID FIRST VALVE SEAT AND A SECOND POSITION IN WHICH SAID VALVE MEMBER SEALINGLY ENGAGES SAID SECOND VALVE SEAT; AND, MEANS FOR URGING SAID VALVE MEMBER TO SAID FIRST POSITION.
References Cited (Backward Citations)
US831677A
Cited
US1854709A
Cited
US2282188A
Cited
US2417494A
Cited
US2959188A
Cited
FR1125604A
Cited
US3107893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |