Hydraulically driven variable speed power transmission assembly
Abstract
Abstract THE PRESENT INVENTION IS CHARACTERIZED IN THAT IN A HYDRAULICALLY DRIVEN TRACTOR FOR AGRICULTURAL OR CONSTRUCTION WORK, MEANS IS PROVIDED WHEREBY RESISTANCE TO THE OUTFLOW OF OIL FROM AN OIL DISCHARGE PATH FOR PRESSURE REGULATION COMMUNICATING WITH A HIGH PRESSURE-SIDE OIL PATH ESTABLISHING FLUID CONNECTION BETWEEN A HYDRAULIC PUMP AND A HYDRAULIC MOTOR IS AUTOMATICALLY INCREASED IN RESPONSE TO A DECREASE IN THE RATE OF OIL TO THE HYDRAULIC MOTOR. THE INVENTION ELIMINATES THE PRIOR ART DISADVANTAGE THAT THE MAXIMUM HORSEPOWER THAT CAN BE DEVELOPED DURING LOW SPEED RUNNING IS SMALLER THAN THE MAXIMUM HORSEPOWER POSSESSED BY THE ENGINE ITSELF, AND THE INVENTION MAKES IT POSSIBLE TO USE WITH A MINIMUM LOSS THE MAXIMUM HORSEPOWER POSSESSED BY THE ENGINE ITSELF DURING LOW SPEED RUNNING AS WELL AS DURING HIGH SPEED RUNNING.
Inventors
- 👤 Rihei Nagano
- 👤 Yoshinobu Murayama
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |