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United States of America Patent
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app pub date -
Dec 2, 2014
filing date -
Dec 9, 2013
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Abstract
An expansion valve according to an embodiment includes a power element, a metal seal part, and an elastic seal part. The power element has a housing, formed of a metal different from a kind of metal constituting a body, and a drive section, provided within the housing, which generates a drive force used to open and close a valve section. And the power element is fixed to the body in a manner such that the housing closes an opening end of the body. The metal seal part is provided between the body and the housing, and seals between an inside and an outside of the body by a deformation in a metal. The elastic seal part is provided between the body and the housing, and seals between an inside and an outside of the housing in such a manner as to surround the periphery of the metal seal part.
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