Oil relief valve
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United States of America Patent
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Mar 17, 2015
Grant Date -
May 1, 2014
app pub date -
Jan 11, 2013
filing date -
Nov 1, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
An oil relief valve apparatus may include a valve hole that may be formed in a pump housing of an oil pump and may be provided between an oil passage and a relief passage to communicate therebetween, a plunger provided on an upper end of the valve hole, a support provided on a lower end of the valve hole, and an elastic member provided between the plunger and the support to elastically support the plunger, wherein the valve hole has an upper portion and a lower portion and may be provided with the plunger that have different cross sectional areas therein, wherein the plunger has an upper end and a lower end having different cross sectional areas and face-contacts to the valve hole, and wherein the upper end of the plunger may be slidably engaged to the upper portion of the valve hole.
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