Temperature responsive line valve
US4778104A · kind A · utility
106Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1986 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 3, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7739
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Line valve apparatus for shower anti-scald and other uses comprising a housing (10) valving member (14) and a coil spring pilot valve (20) formed of a shape memory effect alloy and arranged for a first closed loop fluid blocking configuration to prevent, and second open spiral loop configuration(s) to enable, coil expanding valving member movement under the combined force of line back pressure and the coil expanding forces per se as a rising fluid temperature puts the alloy through a martensitic to austentitic transformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.