Flush valve
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United States of America Patent
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Sep 8, 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, and a piston disposed in the valve body between the inlet and said outlet to regulate flow through the valve body. The piston has a shoulder. A neck depends from the shoulder and has a smaller perimeter than the shoulder. And, a flange depends from the neck and has a larger perimeter than the neck. Better flow characteristics of fluid about the shoulder, neck, and flange minimize noise coming from the valve and increase reliability thereof.
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