Thermal flow control valve
US6772958B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Apr 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1333
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A thermal flow control valve uses a cylindrical valve sleeve in a stepped bore to regulate fluid flow between an inlet and an outlet. A wax filled actuator is coupled to the valve sleeve to move the sleeve from an open position in which radial flow openings in the sleeve communicate with a larger diameter portion of the stepped bore to a closed position in which the radial flow openings are closed by a sleeve chamber closely surrounding the sleeve. A flow-through end cap closes one end of the stepped bore and provides an axially aligned fixed stop for the actuator piston. Two-way, three-way and mixing embodiments of the valve are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.