Expansion valve with vibration proof spring
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United States of America Patent
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Oct 3, 2017
Grant Date -
Dec 8, 2016
app pub date -
May 31, 2016
filing date -
Jun 4, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An expansion valve includes: a body having an insertion hole in a partition separating a first passage from a second passage; a power element configured to generate a drive force for opening or closing a valve section; a shaft extending through the insertion hole and configured to transmit the drive force to a valve element; a vibration-proof spring coaxially supporting the shaft and biasing the shaft radially inward to apply a sliding resistance thereto; and a flexible O-ring supported by one of an inner surface of the support part defining the insertion hole and an outer surface of the shaft and being in close contact with the other thereof. The O-ring, sliding portions of the shaft and the support part, and the vibration-proof spring are arranged in this order from a first passage side toward a second passage side in an axial direction of the shaft.
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