RELIEF VALVE
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United States of America Patent
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-
N/A
Issued Date -
Jun 18, 2015
app pub date -
Dec 26, 2012
filing date -
Jan 13, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A relief valve includes an adjusting piston which is slidable by the action of a pilot pressure, a pilot poppet on which a spring force of a setting spring adjusted by a sliding movement of the adjusting piston acts in a valve closing direction, a spring chamber into which a spring for exerting a spring force opposing the pilot pressure is incorporated, and an air vent hole which is formed in the spring chamber and exposes the spring chamber to outside.
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