Temperature dependent variable flow orifice
US9618132B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jun 20, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Feb 11, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7737
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variable flow orifice for a hydraulic control system in a transmission includes a shape memory alloy that selectively increases and decreases the size of an orifice. The deformation of the shape memory alloy, and therefore the size of the orifice, is a function of the temperature of the transmission. During cold conditions the orifice size is increased and during normal operating conditions the size of the orifice is decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.