Patent US3206931A successfully refreshed from Google Patents.
US3206931A
Expired / Lapsed
US
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Hydraulic transmission systems
Assignee: Individual
•
Filing: 1964-05-12
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Granted: 1965-09-21
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Expires: 1984-05-12
Abstract
No abstract record available.
Inventors
- 👤 Wilson Ronald Holdsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:28
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0428; F03C1/0447; F03C1/045; F03C1/053; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A HYDRAULIC MOTOR, FOR USE IN A CLOSED HYDRAULIC TRANSMISSION SYSTEM OF THE TYPE DESCRIBED, COMPRISING TWO SETS OF FIXED CYLINDERS, ONE SET OF LARGER AND THE OTHER SET OF SMALLER CAPACITY, EACH OF SAID CYLINDERS ACCOMMODATING A PISTON ARRANGED TO DRIVE A TWO-LOBE CAM MOUNTED ON A COMMON ROTARY OUTPUT SHAFT WHICH EXTENDS AT RIGHT ANGLES TO THE CYLINDER AXES, A DISTRIBUTOR VALVE CONNECTING SAID CYLINDERS IN TURN TO PRESSURE AND EXHAUST, AND VALVE MECHANISM WHEREBY EITHER OR BOTH SETS OF CYLINDERS CAN BE PLACED IN OPERATION.
Claim 2
Dependent Claim
88 words
A HYDRAULIC MOTOR, FOR USE IN A CLOSED HYDRAULIC TRANSMISSION SYSTEM OF THE TYPE DESCRIBED, COMPRISING TWO SETS OF FIXED CYLINDERS, ONE SET OF LARGER AND THE OTHER SET OF SMALLER CAPACITY, EACH OF SAID CYLINDERS ACCOMMODATING A PISTON ARRANGED TO DRIVE A TWO-LOBE CAM MOUNTED ON A COMMON ROTARY OUTPUT SHAFT WHICH EXTENDS AT RIGHT ANGLES TO THE CYLINDER AXES, A DISTRIBUTOR VALVE CONNECTING SAID CYLINDERS IN TURN TO PRESSURE AND EXHAUST, AND VALVE MECHANISM WHEREBY EITHER OR BOTH SETS OF CYLINDERS CAN BE PLACED IN OPERATION.
References Cited (Backward Citations)
US1229076A
Cited
US1906787A
Cited
US2163080A
Cited
US2697403A
Cited
US2979306A
Cited
US2984985A
Cited
US3057161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |