Diaphragm with flange and annular ridge and diaphragm valve using the same
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United States of America Patent
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Aug 23, 2016
Grant Date -
Jun 18, 2015
app pub date -
Mar 21, 2013
filing date -
May 30, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A durable diaphragm valve has a single-layer structure consisting of rubber materials. The single-layer structure has a membrane part deforming and moving up and down with opening and closing of a flow channel and a flange part which is provided around said membrane part and sandwiched between a valve body and a bonnet. The flange part has an annular ridge consisting of an upper ridge protruding upward and a lower ridge protruding downward from a position corresponding to said upper ridge. The upper ridge has an inner upper ridge and an outer upper ridge with its protruding height being lower than the inner upper ridge, which are consecutively formed in a staircase pattern.
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