US3129781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic differential transmission
Assignee: Enerpac Tool Group Corp
•
Filing: 1962-11-16
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Granted: 1964-04-21
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Stein Gary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:27
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/456; F16H61/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A DRIVING ARRANGEMENT FOR A VEHICLE HAVING A PAIR OF TRACTION WHEELS, A HYDROSTATIC DIFFERENTIAL TRANSMISSION INCLUDING, A FLUID MOTOR DRIVINGLY CONNECTED TO EACH OF SAID TRACTION WHEELS; TWO INDEPENDENT FLUID SUPPLY SOURCES, ONE FOR EACH OF SAID MOTORS FOR FURNISHING DRIVING FLUID THERETO; A THIRD INDEPENDENT FLUID SUPPLY SOURCE FOR FURNISHING FLUID TO EACH OF SAID MOTORS; AND A ONE-WAY CHECK VALVE BETWEEN SAID THIRD SOURCE AND EACH OF SAID MOTORS WHEREBY SAID THIRD SOURCE DELIVERS FLUID INDEPENDENTLY AND SEPARATELY TO EACH OF SAID MOTORS.
Claim 2
Dependent Claim
87 words
IN A DRIVING ARRANGEMENT FOR A VEHICLE HAVING A PAIR OF TRACTION WHEELS, A HYDROSTATIC DIFFERENTIAL TRANSMISSION INCLUDING, A FLUID MOTOR DRIVINGLY CONNECTED TO EACH OF SAID TRACTION WHEELS; TWO INDEPENDENT FLUID SUPPLY SOURCES, ONE FOR EACH OF SAID MOTORS FOR FURNISHING DRIVING FLUID THERETO; A THIRD INDEPENDENT FLUID SUPPLY SOURCE FOR FURNISHING FLUID TO EACH OF SAID MOTORS; AND A ONE-WAY CHECK VALVE BETWEEN SAID THIRD SOURCE AND EACH OF SAID MOTORS WHEREBY SAID THIRD SOURCE DELIVERS FLUID INDEPENDENTLY AND SEPARATELY TO EACH OF SAID MOTORS.
References Cited (Backward Citations)
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |