US3561294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system for automatic transmission
Assignee: Nissan Motor Co Ltd
•
Filing: 1968-11-29
•
Granted: 1971-02-09
•
Expires: 1988-11-29
Abstract
Abstract IN A HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION OF A VEHICLE, TO CONTROL LINE PRESSURE ACTUATING FRICTION CLUTCHES AND BRAKES, TWO VALVES ARE PROVIED TO DECREASE LINE PRESSURE STEPWISE AT STARTING CONDITIONS ALL THROUGH THE SELECTION POSITIONS AND TO INCREASE LINE PRESSURE STEPWISE AT LOW THROTTLE HIGH SPEED CONDITIONS ONLY WHEN A LOW GEAR RATIO CAUSING AN ENGINE BRAKING CONDITION IS SELECTED.
Inventors
- 👤 Tetsuya Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:49
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H61/00; F16H61/0021; F16H61/04; F16H2061/0488; F16H61/21
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |