Hydrostatic transmission control system
Abstract
Abstract DISCLOSED HEREIN IS A HYDRAULIC CONTROL SYSTEM FOR CONTROLLING THE OPERATION OF A PAIR OF HYDROSTATIC TRANSMISSIONS. THE HYDRAULIC CONTROL SYSTEM INCLUDES TWO CONTROL CYLDIDER ASSEMBLIES AND TWO VALVE ASSEMBLIES,ONE OF EACH BEING ASSOCIATED WITH ONE OF THE HYDROSTATIC TRANSMISSIONS. IN ONE EMBODIEMENT, A SINGLE MANUALLY OPERABLE ACTUATOR MEMBER IS PROVIDED FOR OPERATING THE VALVE ASSEMBLIES WHICH IN TURN CONTROL THE CYLINDER ASSEMLIES TO REGULATE THE DIRECTION OF OPERATION AND THE INPUT TO OUTPUT SPEED RATIO OR DRIVE RATIO OF THE HYDROSTATIC TRANSMISSIONS. AN ANTISTALL MEANS IS ASOCIATED WITH EACH OF THE HYDROSTATIC TRANSMISION FOR REDUCING THE OUTPUT SPEED IF THE ASSOCIATED HYDROSTATIC TRANSMISION WHEN A SENSOR ASSEMBLY DETECTS AN IMPENDING STALLING OF AN ENGINE OR SOURCE OF POWER CONNECTED TO THE HYDROSTATIC TRANSMISSION.
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |