Hydraulic control device for automatic transmission
US9759315B2 · kind B2 · utility
1Cited by
1References
8Claims
0Family size
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Key dates
| Filing date | Dec 24, 2014 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Dec 24, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control device that includes a normally closed first solenoid valve, a first check valve, a failsafe valve, and a second check valve, wherein the first movable member of the first check valve is biased to cut off the communication between the first input port and the first drain port in case of the failure in which no current is applied to the first solenoid valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.