Speed control
Abstract
Abstract THE DISCLOSURE HEREIN IS OF A SPEED CONTROL FOR USE PARTICULARLY WITH HYDRAULICALLY OPERATED MECHANSMS WHICH DEMAND INCREASED PRESSURE WHEN A LOAD IS IMPOSED THEREON, SUCH MECHANISMS BEING PRIMARILY ENGINE DRIVEN BY HYDRAULIC PUMPS IN A HYDRAULIC SYSTEM IN WHICH IT IS DESIRABLE TO REGULATE THE SPEED BY IN TURN REGULATING THE THROTTLE BY WHICH THE ENGINE SPEED IS ACTUALLY CONTROLLED. THE ACTUAL CONTROL OF THE MECHANISM IS EFFECTED BY A VALVE WHICH RECEIVES THE PRESSURE FROM THE HYDRAULIC SYSTEM, AND UPON INCREASED DEMAND THEREFOR IN TURN OPERATES A VALVE MEMBER TO DIRECT VACUUM DEVELOPED IN THE ENGINE BY WHICH THE ENTIRE MECHANISM IS DRIVEN, TO A VACUUM ACTUATOR WHICH IS IN TURN CONNECTED TO THE THROTTLE AND THEREBY UPON IN CREASED VACUUM PRODUCED, IN TURN INCREASES THE SPEED OF THE ENGINE WHEREBY THE PRESSURE IN THE HYDRAULIC PUMP DRIVEN THEREBY IS LIKEWISE INCREASED, THE HYDRAULIC AND VACUUM SYSTEMS BEING ENTIRELY SEPARATE TO OBVIATE ANY POSSIBILITY OF HYDRAULIC BALANCE WHICH WOULD PREVENT RETURN OF THE ENGINE TO NORMAL SPEED WHEN THE PRESSURE IS REMOVED FROM THE HYDRAULIC SYSTEM.
Inventors
- 👤 Joseph C Castleberry
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |