Hydraulic regulating arrangement
Abstract
Abstract A HYDRAULIC ARRANGEMENT IN WHICH A HYDRAULICALLY-OPERATED DEVICE IS CONNECTED TO A PUMP THROUGH A REGULATING VALVE. THE PUMP DELIVERS FLUID UNDER PRESSURE AND INTO A PRESSURE LINE COMMUNICATING WITH THE REGULATING VALVE. A DIFFERENTIAL PISTON AND CYLINDER HAS ONE FACE OF THE CYLINDER SUBJECTED TO FLUID PRESSURE FROM THE PUMP. THE OTHER SIDE OF THE DIFFRENTIAL PISTON IS SUBJECTED TO THE FORCE OF A SPRING AND TO THE PRESSURE PREVAILING BETWEEN THE REGULATING AND THE HYDRAULICALLY-OPERATED DE- VICE. A PUMP ADJUSTMENT MEMBER IS MECHANICALLY COUPLED TO THE PISTON, SO THAT THE PUMP CHARACTERISTICS ARE ADJUSTED AS A FUNCTION OF THE POSITION OF THE DIFFERENTIAL PISTON. THE DIFFERENTIAL PISTON ASSUMES THAT POSITION, IN WHICH THE FORCES EXERTED UPON THE OPPOSITE SIDES OF THE PISTON ARE MADE EQUAL.
Inventors
- 👤 Gunther Schwerin
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |