Patent US3131539A successfully refreshed from Google Patents.
US3131539A
Expired / Lapsed
US
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Hydraulic transmission
Assignee: Ford Motor Co
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Filing: 1961-11-20
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Granted: 1964-05-05
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 John P Creighton
- 👤 Eric J Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:47
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/04; F16H39/06; F16H39/08; F16H39/10; F16H39/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN INFINITELY VARIABLE POWER TRANSMISSION MECHANISM COMPRISING A DRIVING SHAFT, A DRIVEN SHAFT, A PAIR OF HYDROSTATIC UNITS DISPOSED IN A CLOSED HYDRAULIC CIRCUIT, EACH UNIT HAVING A ROTOR, FLUID DISPLACEMENT ELEMENTS CARRIED BY SAID ROTOR, MEANS FOR CONTROLLING THE DISPLACEMENT OF THE ELEMENTS OF EACH UNIT, THE ROTOR OF EACH UNIT BEING CONNECTED TO SAID POWER INPUT SHAFT, THE DISPLACEMENT CONTROLLING MEANS OF ONE UNIT BEING HELD FROM ROTATING ABOUT THE AXIS OF SAID ONE UNIT AND THE DISPLACEMENT CONTROLLING MEANS OF THE OTHER UNIT BEING CONNECTED TO SAID POWER OUTPUT SHAFT.
Claim 2
Dependent Claim
93 words
AN INFINITELY VARIABLE POWER TRANSMISSION MECHANISM COMPRISING A DRIVING SHAFT, A DRIVEN SHAFT, A PAIR OF HYDROSTATIC UNITS DISPOSED IN A CLOSED HYDRAULIC CIRCUIT, EACH UNIT HAVING A ROTOR, FLUID DISPLACEMENT ELEMENTS CARRIED BY SAID ROTOR, MEANS FOR CONTROLLING THE DISPLACEMENT OF THE ELEMENTS OF EACH UNIT, THE ROTOR OF EACH UNIT BEING CONNECTED TO SAID POWER INPUT SHAFT, THE DISPLACEMENT CONTROLLING MEANS OF ONE UNIT BEING HELD FROM ROTATING ABOUT THE AXIS OF SAID ONE UNIT AND THE DISPLACEMENT CONTROLLING MEANS OF THE OTHER UNIT BEING CONNECTED TO SAID POWER OUTPUT SHAFT.
References Cited (Backward Citations)
US2569562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |