Valve
Abstract
Abstract A VALVE STRUCTURE INCLUDING A BODY AND A CONDUIT THERETO, THE BODY AND CONDUIT FORMING A VALVE CHAMBER, AND THE CONDUIT PROVIDING A VALVE SEAT WITH A PISTON-TYPE VALVE IN THE VALVE CHAMBER ENGAGEABLE WITH THE VALVE SEAT AND BEING SUPPORTED BY THE BODY BY MEANS OF AN ANNULAR SUPPORT ON THE BODY HAVING A STATIONARY EXTERNAL SEALING MEANS, THE PISTON VALVE HAVING A CYLINDRICAL SKIRT SURROUNDING THE ANNULAR SUPPORT ON THE VALVE BODY AND ENGAGEABLE WITH THE SEALING MEANS TO FORM A PRESSURE CHAMBER WITHIN THE PISTON VALVE AND ANNULAR SUPPORTING WALL ON THE BODY IN COMBINATION WITH MEANS WHEREBY PRESSURE OF THE FLUID IN THE CONDUIT WILL OPEN THE VALVE, AND FLUID PRESSURE WITHIN THE PRESSURE CHAMBER WHEN ADMITTED THERETO WILL FUNCTION TO CLOSE THE PISTON VALVE.
Inventors
- 👤 Artson P Hardison
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |