Patent US3587353A successfully refreshed from Google Patents.
US3587353A
Expired / Lapsed
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Hydraulic control system for an automatic transmission mechanism
Assignee: Nissan Motor Co Ltd
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Filing: 1969-05-06
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Granted: 1971-06-28
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Expires: 1989-05-06
Abstract
Abstract A HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION MECHANISM FOR AN AUTOMOTIVE VEHICLE TO REDUCE A SHIFTING TIME UPON MANUAL DOWNSHIFTING BY RAISING LINE PRESSURE FOR EFFECTING GOOD ENGINE BRAKING FUNCTION. THIS SYSTEM COMPRISES A THROTTLE BACKUP VALVE MEANS FOR PROVIDING HIGH FLUID PRESSURE WITHOUT RESPECT TO THE LOW THROTTLE OPENING IN ENGINE, AND A BACKUP SCHEDULE VALVE FOR CONTROLLING THE OPERATION OF THE THROTTLE BACKUP VALVE DEPENDING UPON THE POSITION OF THE SELECTOR VALVE MEANS.
Inventors
- 👤 Tetsuya Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:10
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H61/0265; F16H61/0267
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |