Power transmission having downshift inhibitor
Abstract
Abstract A TRANSMISSION OF THE TYPE HAVING A TORQUE COVERTER THAT CAN BE ENGAGED IN DIRECT THROUGH A DIRECT DRIVE CLUTCH WHENEVER THE SPEED TO THE ENGINE IS AT A RATED SPEED, AND IN WHICH THE TRANSMISSION SHOULD NOT BE DOWNSHIFTED IF IT IS OPERATING AT TOO FAST A SPEED BECAUSE OF POSSIBLE DEMAGE TO THE ENGINE AND TRANSMISSION. A DOWNSHIFT INHIBITOR IS PROVIDED FOR SUCH A TRANSMISSION AND INCLUDES A FLUID ACTUATED BRAKE AND A ONE-WAY CLUTCH CONNECTED WITH THE SPEED SELECTOR SHIFTING LEVER WHEREBY THE LEVER CAN BE SHIFTED IN THE UPSHIFT DIRECTION BUT THE BRAKE RETARDS THE LEVER AGAINST DOWNSHIFTING WHEN THE TRANSMISSION IS OPERATING OVER A PREDETERMINED SPEED. THE FLUID BRAKE ON THE DOWNSHIFT INHIBITOR IS ACTUATED BY THE SAME FLUID PRESSURE THAT ACTUATED THE DIRECTED DRIVE CLUTCH. THUS, THE DOWNSHIFT INHBITOR INCLUDES A ONE-WAY CLUTCH AND A FLUID BRAKE THAT WORK TOGETHER AUTOMATICALLY TO INDICATE TO THE OPERATOR OF THE VECHICLE WHEN IT IS UNSAFE TO DOWNSHIFT
Inventors
- 👤 Bradford K Shull
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |