Pressure regulating valve
Abstract
Abstract DISCLOSED HEREIN IS A PRESSURE REGULATING VALVE INCLUDING A SPOOL VALVE MOUNTED FOR MODULATING MOVEMENT IN A VALVE PASSAGE TO CONTROL THE ADMISSION OF HIGH PRESSURE HYDRAULIC FLUID INTO THE VALVE PASSAGE AND HAVING A FLUID FLOW PASSAGE, A PISTON POSITIONED IN THE VALVE PASSAGE AND OPERATIVELY ASSOCIATED WITH SAID FLUID FLOW PASSAGE TO DEFINE A HYSTERESIS CHAMBER IN THE VALVE PASSAGE AND A REACTION CHAMBER IN THE FLUID FLOW PASSAGE IN THE SPOOL VALVE, A FLUID PISTON PUMP CONNECTED TO THE VSLVE TO PROVIDE A PULSATING FORCE AT EACH END OF THE SPOOL VALVE AND A CONTROL VALVE CONNECTED TO CONTROL THE PRESSURE OF THE PULSATING FLUID AT EACH END OF THE SPOOL VALVE. A HYDRAULIC POWER ASSIST IS PROVIDED FOR ACTUATING THE SPOOL VALVE WHEN OPERATING UNDER HEAVY LOADS.
Inventors
- 👤 Richard O Gordon
Bibliographic Details
Claims Analysis
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |