Flush valve pressure balance
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United States of America Patent
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Jun 9, 2015
Grant Date -
Sep 22, 2011
app pub date -
Mar 3, 2011
filing date -
Mar 17, 2010
priority date (Note) -
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Abstract
A flush valve has a valve body having an inlet and an outlet. A piston is disposed in the valve body between the inlet and the outlet. A piston cap is disposed within the valve body and has a wall along which the piston is guided. A groove is disposed in the piston cap wall for equalizing pressure on sides of the piston translating therein. The groove has a shallow, semicircular shape whereby a possibility that fluid flow therethrough is diminished is minimized.
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