Dual function thermal valve
US4026464A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Dec 18, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86895
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improved, dual function, thermal valve assembly has three ports and two passages connecting these three ports to a common chamber. The assembly employs two thermally responsive actuating members which are actuable to move a valve plug in the chamber at different temperatures to provide a first temperature region wherein the plug seals port one so that only ports two and three are in communication, a second temperature region wherein the plug does not seal any of the ports so that ports one, two, and three are in mutual communication, and a third temperature region wherein the plug seals port three so that only ports one and two are in communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.