Low pressure drop thermal by-pass valve
US8991719B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2009 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1333
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A thermal by-pass valve for a heat exchange circuit includes a housing forming a chamber and a by-pass valve port surrounded by a valve seat. The valve port is located between first and second sections of the chamber. First and second oil ports open into the first section. At least a third port opens into the second section. A thermally sensitive actuator is mounted in the first section and has a body and a piston located at one end. The body is movable in the chamber in response to extension of the piston. A valve member is operably mounted on the body and is movable by extension of the piston. A spacer projects from and is connected to the body and forms a passage through which the piston extends. The spacer acts to maintain the adjacent end of the actuator body at least the length of the passage away from an end of the chamber. The spacer can have a valve portion to close a further valve port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.