Hydraulic servo for friction coupling element of automatic transmission
US4890512A · kind A · utility
3Cited by
19References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 12, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Jan 12, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/3026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Described herein is a hydraulic servo for a friction coupling element of an automatic transmission, which is mounted in association with a one-way clutch and which has reduced dimensions in radial and axial directions. The hydraulic servo essentially comprises: an annular drum splined with a sleeve portion of the inner race of the one-way clutch and arranged to receive the reaction of the one-way clutch by a fixed member in the automatic transmission case; a piston fitted in the annular drum; and a return spring mounted in the drum for returning the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.