US3605931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic drive system for a vehicle
Assignee: NAT RES DEV
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Filing: 1968-12-06
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Granted: 1971-09-20
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Expires: 1988-12-06
Abstract
Abstract A HYDROSTATIC DRIVE SYSTEM FOR A VEHICLE IN WHICH A HYDRAULIC MOTOR IS MOUNTED IN THE STEERABLE VEHICLE WHEEL OR IMMEDIATELY ADJACENT THE VEHICLE WHEEL AND MOVABLE WITH IT. THE SYSTEM INCLUDES A CONDUIT FOR CONVEYING FLUID FROM AN ENGINE DRIVE PUMP TO THE MOTOR VIA A FLUID COUPLING. THE FLUID COUPLING IS PREFERABLY IN THE FORM OF A BALL JOINT HAVING A SWIVEL AXIS SUBSTANTIALLY ALIGNED WITH THE STEERING OR KING PIN AXIS OF THE WHEEL.
Inventors
- 👤 Donald Firth
- 👤 Roger Harvey Yorke Hancock
- 👤 Derek Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:47
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/02; B; B60; B60K; B60K17/00; B60K17/04; B60K17/14; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32729
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |