US3252380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary power steering arrangement, especially for motor vehicles
Assignee: ZF Friedrichshafen AG
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Filing: 1963-07-31
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Granted: 1966-05-24
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Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Jablonsky Erich
- 👤 Wagner Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:20
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/20; B62D5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A BOOSTER STEERING SYSTEM COMPRISING A DOUBLE CHAMBER CYLINDER AND A REVERSIBLY MOVABLE PISTON THEREIN HAVING A FACE IN EACH CHAMBER, A STERRING MECHANISM MEMBER SUPPORTED FOR REVERSIBLE MOVEMENT AND OPERATIVELY CONNECTED TO SAID PISTON FOR REVERSIBLE MOVEMENT THEREBY; MEANS COMPRISING VALVE ELEMENTS OPERATIVELY CONNECTED TO SAID MEMBER AND REVERSIBLY MOVABLE THREBY FOR RELEASING PRESSURE FROM SAID CYLINDER RESPONSIVE TO MOVEMENT OF SAID PISTON TO A PREDETERMINED DEGREE IN EITHER DIRECTION, AND A MANUALLY OPERABLY STEERING COLUMN CONNECTED TO SAID PISTON FOR EXERTING MANUAL STEERING FORCE THEREON AND MEANS WHEREBY SAID MANUAL FORCE CAN BE EXERTED ON SAID PISTON SUBSEQUENT TO RELEASE OF PRESSURE FROM SAID CYLINDER.
Claim 2
Dependent Claim
107 words
A BOOSTER STEERING SYSTEM COMPRISING A DOUBLE CHAMBER CYLINDER AND A REVERSIBLY MOVABLE PISTON THEREIN HAVING A FACE IN EACH CHAMBER, A STERRING MECHANISM MEMBER SUPPORTED FOR REVERSIBLE MOVEMENT AND OPERATIVELY CONNECTED TO SAID PISTON FOR REVERSIBLE MOVEMENT THEREBY; MEANS COMPRISING VALVE ELEMENTS OPERATIVELY CONNECTED TO SAID MEMBER AND REVERSIBLY MOVABLE THREBY FOR RELEASING PRESSURE FROM SAID CYLINDER RESPONSIVE TO MOVEMENT OF SAID PISTON TO A PREDETERMINED DEGREE IN EITHER DIRECTION, AND A MANUALLY OPERABLY STEERING COLUMN CONNECTED TO SAID PISTON FOR EXERTING MANUAL STEERING FORCE THEREON AND MEANS WHEREBY SAID MANUAL FORCE CAN BE EXERTED ON SAID PISTON SUBSEQUENT TO RELEASE OF PRESSURE FROM SAID CYLINDER.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |