Patent US3347041A successfully refreshed from Google Patents.
US3347041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic steering system
Assignee: Weatherhead Co
•
Filing: 1965-10-23
•
Granted: 1967-10-17
•
Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Bahniuk Eugene
- 👤 Jack L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/09; B62D5/093; F; F15; F15B; F15B9/00; F15B9/02; F15B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A HYDRAULIC STEERING SYSTEM COMPRISING A STEERING ACTUATOR MOTOR HAVING FIRST AND SECOND FLUID CHAMBERS ADAPTED TO BE SELECTIVELY CONNECTED TO A SOURCE OF FLUID PRESSURE FOR REVERSIBLE ACTUATION, A ROTATABLE INPUT SHAFT, A SOURCE OF FLUID PRESSURE, A RESERVOIR, A METERING VALVE OPERABLE BY SAID INPUT SHAFT HAVING FIRST AND SECOND OUTLET PORTS AND OPERABLE TO SELECTIVELY CONNECT SAID FLUID PRESSURE SOURCE TO SAID FIRST AND SECOND OUTLET PORTS, A REVERSIBLE POSITIVE DISPLACEMENT FEEDBACK MOTOR OPERABLE TO PROVIDE FOLLOW-UP ROTATION FOR SAID INPUT SHAFT, AND
Claim 2
Dependent Claim
86 words
A HYDRAULIC STEERING SYSTEM COMPRISING A STEERING ACTUATOR MOTOR HAVING FIRST AND SECOND FLUID CHAMBERS ADAPTED TO BE SELECTIVELY CONNECTED TO A SOURCE OF FLUID PRESSURE FOR REVERSIBLE ACTUATION, A ROTATABLE INPUT SHAFT, A SOURCE OF FLUID PRESSURE, A RESERVOIR, A METERING VALVE OPERABLE BY SAID INPUT SHAFT HAVING FIRST AND SECOND OUTLET PORTS AND OPERABLE TO SELECTIVELY CONNECT SAID FLUID PRESSURE SOURCE TO SAID FIRST AND SECOND OUTLET PORTS, A REVERSIBLE POSITIVE DISPLACEMENT FEEDBACK MOTOR OPERABLE TO PROVIDE FOLLOW-UP ROTATION FOR SAID INPUT SHAFT, AND
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |