Hydraulic circuit for controlling an automatic transmission
US4722251A · kind A · utility
14Cited by
48References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 31, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/44
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil pass for communicating a hydraulic servo a change-over valve is provided with an orifice and a by-pass disposed parallel to one another. The by-pass is provided with a sequence valve. When the hydraulic servo is subjected to less than a predetermined pressure, the sequence valve communicates to the change-over valve and the hydraulic servo through the by-pass, and when the hydraulic servo is subjected to a pressure that is higher than the predetermined pressure, the sequence valve is cut off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.