Hydraulic forward/reverse shift fork control for a power transmission
US5425688A · kind A · utility
6Cited by
6References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Aug 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1933
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift fork for a forward-reverse shift mechanism has a hydraulic piston portion for moving the shift fork. The piston is controlled by a hydraulic valve system. The valve system is effective to delay the engagement of the respective forward and reverse, hydraulically-operated, torque transfer devices. The shift fork will enforce the establishment of the proper power path through a synchronizer prior to the engagement of the torque transfer control devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.