Thermoelement
US6817540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Sep 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1921
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A thermo element that makes it possible to efficiently raise the temperature of a whole body of wax encapsulated in a case and to obtain a reliable seal structure for a terminal withdrawal portion used to control the electrification of a heating device. The thermo element includes a thermally expanding body encapsulated in a tube-type case, and which allows a moving piston to advance toward and withdraw from the outside of the case with a change in volume of the thermally expanding body that accompanies a variation in the temperature thereof, and a heating element disposed in the case and that thermally affects the thermally expanding body. An electrode member is disposed inside the heating element. Further, a plate spring member, which also serves as a heat radiation fin for radiating heat to the thermally expanding body, is disposed at the outer circumference of the heating element. The plate spring member has a larger surface area than the heating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.