Thermoelement
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United States of America Patent
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Nov 16, 2004
Grant Date -
Jun 17, 2004
app pub date -
Sep 30, 2003
filing date -
Jan 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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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.
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