Patent US3159230A successfully refreshed from Google Patents.
US3159230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering system for towable vehicles
Assignee: Doosan Bobcat North America Inc
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Filing: 1962-02-14
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Granted: 1964-12-01
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Expires: 1982-02-14
Abstract
No abstract record available.
Inventors
- 👤 Richard O Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:56
CPC Classifications
B; B62; B62D; B62D12/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A POWER STEERING SYSTEM HAVING A DOUBLE-ACTING PISTON AND CYLINDER FLUID ACTUATOR, A FLUID RESERVOIR, A PUMP CONNECTED TO THE RESERVOIR FO RDRAWING FLUID THEREFROM, AND A STEERING CONTROL VALVE CONNECTED TO THE PUMP FOR RECEIVING PRESSURIZED FLUID THEREFROM AND TO THE RESERVOIR FOR RETURNING FLUID THERETO, OPPOSITE ENDS OF THE CYLINDER BEING CONNECTED TO THE VALVE, MEANS FOR RESTRICT-
Claim 2
Dependent Claim
61 words
IN A POWER STEERING SYSTEM HAVING A DOUBLE-ACTING PISTON AND CYLINDER FLUID ACTUATOR, A FLUID RESERVOIR, A PUMP CONNECTED TO THE RESERVOIR FO RDRAWING FLUID THEREFROM, AND A STEERING CONTROL VALVE CONNECTED TO THE PUMP FOR RECEIVING PRESSURIZED FLUID THEREFROM AND TO THE RESERVOIR FOR RETURNING FLUID THERETO, OPPOSITE ENDS OF THE CYLINDER BEING CONNECTED TO THE VALVE, MEANS FOR RESTRICT-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |