US3610105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering apparatus
Assignee: Toyoda Koki KK
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Filing: 1969-04-22
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Granted: 1971-10-05
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Expires: 1989-04-22
Abstract
Abstract THE PRESENT INVENTION RELATES TO POWER STEERING APPARATUS IN WHICH THE OPERATION OF A SPOOL VALVE IS RENDERED EASY BY PREVENTING THE STEERING FORCE OR THE REAFCTION THERETO FROM ACTING ON THE SPOOL VALVE. IN THIS APPARATUS THE SPOOL VALVE IS SCREWED ONTO A STEERING SHAFT CONNECTED TO THE STEERING WHEEL, THE ROTATING SHAFT FOR DEFLECTING THE STEERABLE FRONT WHEELS IS CONNECTED TO THE STEERING SHAFT BY RESILIENT COUPLING MEANS, THE HYDRAULIC PRESSURE CIRCUIT IS CONTROLLED BY THE DISPLACEMENT OF THE SPOOL VALVE, AND THE STEERING TORQUE IS BOOSTED BY HYDRAULIC PRESSURE.
Inventors
- 👤 Tamaki Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:20
CPC Classifications
F; F03; F03C; F03C2/00; F03C2/30; F03C2/304; B; B62; B62D; B62D5/00; B62D5/06; B62D5/08; B62D5/20; B62D5/24; F03C1/00; F03C1/02; F03C1/06; F03C1/0602; F03C1/0605; F03C1/0678; F04; F04C; F04C14/00; F04C14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |