US3561295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system for automatic transmission
Assignee: Nissan Motor Co Ltd
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Filing: 1968-12-03
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Granted: 1971-02-09
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Expires: 1988-12-03
Abstract
Abstract A HYDRAULIC CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION MECHANISMS FOR VEHICLES TO PROVIDE HIGH ENGAGING TORQUE CAPACITY OF FRICTION ELEMENTS AT HIGH SPEED LOW THROTTLE CONDITION, IN WHICH A THROTTLE BACK-UP VALVE IS PROVIDED TO PRODUCE HIGH THROTTLE PRESSURE TO INCREASE LINE PRESSURE. THE VALVE IS ACTUATED ONLY AT A SPECIFIED MANUALLY SHIFTED LOW GEAR RATIO POSITION.
Inventors
- 👤 Tetsuya Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:21
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H61/00; F16H61/02; F16H61/0262; F16H61/0265; F16H61/0267; F16H61/0021; F16H61/0276; F16H61/0286
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |