Fluid biased transmission range valve
US5899121A · kind A · utility
11Cited by
16References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19251
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission range valve replaces a traditional spring bias with a pressurized fluid bias to prevent an unintended range change in the event of a significant fluid pressure decrease or loss. Because pressurized fluid is used both for biasing the range valve and for shifting the range valve to effect an auxiliary section range change, a pressure drop or loss of supply pressure will not result in a change of state of the range valve as may occur with prior art spring biased valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.