Liquid filter having a filter bypass valve and filter insert therefor
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United States of America Patent
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Aug 2, 2016
Grant Date -
Oct 17, 2013
app pub date -
Dec 22, 2011
filing date -
Dec 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
Liquid filters comprising a housing having a removable cover, a liquid inlet, an outlet, a replaceable hollow cylindrical filter material insert, and a filter bypass valve comprising a valve seat arranged on the filter insert and a valve body that interacts with the valve seat and is biased in the closing direction. Two radially spaced closed sealing contours are provided between the valve seat and the valve body. At least one bypass channel, connecting the unfiltered and filtered side of the filter while bypassing the filter insert, passes through the valve seat between the sealing contours. The valve body is movably guided in the housing on a housing part, the two sealing contours are offset from each other in the axial direction, and the valve body has a corresponding conical or tapered or dome-like shape in the sealing area of the valve body that interacts with the sealing contours.
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