Patent US3138069A successfully refreshed from Google Patents.
US3138069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering system
Assignee: Individual
•
Filing: 1961-01-16
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Granted: 1964-06-23
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Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:16
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/08; B62D5/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN COMBINATION IN A POWER STEERING SYSTEM HAVING A HYDRAULIC CONTROL VALVE, AN AXIALLY FIXED STEERING WHEEL SHAFT, AN AXIALLY FIXED STEERING OUTPUT SHAFT, A LOST MOTION CONNECTION BETWEEN SAID SHAFTS, SAID CONTROL VALVE HAVING A VALVE HOUSING RIGIDLY CARRIED WITH ONE OF SAID SHAFTS AND A ROTARY VALVE CORE FREELY MOUNTED IN SAID HOUSING AND RIGIDLY CARRIED WITH THE OTHER SHAFT WHEREBY RELATIVE ROTATION BETWEEN SAID SHAFTS CAUSES VALVE MOVEMENT, AND AN ELASTOMERIC DAMPING MEANS RIGIDLY CONNECTED BETWEEN SAID SHAFTS AND SIMULTANEOUSLY RESISTING RELATIVE ROTATION OF SAID CORE AND HOUSING AWAY FROM A CENTRAL POSITION AND DAMPING EXTERNAL FORCES APPLIED TO SAID HOUSING OR SAID CORE.
Claim 2
Dependent Claim
107 words
IN COMBINATION IN A POWER STEERING SYSTEM HAVING A HYDRAULIC CONTROL VALVE, AN AXIALLY FIXED STEERING WHEEL SHAFT, AN AXIALLY FIXED STEERING OUTPUT SHAFT, A LOST MOTION CONNECTION BETWEEN SAID SHAFTS, SAID CONTROL VALVE HAVING A VALVE HOUSING RIGIDLY CARRIED WITH ONE OF SAID SHAFTS AND A ROTARY VALVE CORE FREELY MOUNTED IN SAID HOUSING AND RIGIDLY CARRIED WITH THE OTHER SHAFT WHEREBY RELATIVE ROTATION BETWEEN SAID SHAFTS CAUSES VALVE MOVEMENT, AND AN ELASTOMERIC DAMPING MEANS RIGIDLY CONNECTED BETWEEN SAID SHAFTS AND SIMULTANEOUSLY RESISTING RELATIVE ROTATION OF SAID CORE AND HOUSING AWAY FROM A CENTRAL POSITION AND DAMPING EXTERNAL FORCES APPLIED TO SAID HOUSING OR SAID CORE.
References Cited (Backward Citations)
US2720764A
Cited
US2691283A
Cited
US2967980A
Cited
US3022772A
Cited
US2930359A
Cited
US2964017A
Cited
US2988059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |