Hydraulic servo automatic transmission friction brake band
US5752588A · kind A · utility
3Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2127/007
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic servo for friction brakes of an automatic transmission comprises a cylinder (2) with a main piston (3) arranged therein, a smaller cylinder (8) to receive a smaller compensation piston (9), the smaller cylinder communicating with the pressure chamber (5) of the main piston (3) through an orifice (18) controlled by a ball valve (20). A stepped bore (22) connects the pressure chamber (5) to the compensation chamber (17). A stepped piston (23), located in the bore, forms a discharge control valve (24), which controls the discharge of pressure medium from the compensation chamber (17).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.