Flush valve anti-backflow cartridge
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United States of America Patent
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Sep 9, 2014
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 disposed in the valve body between the inlet and the outlet, a cartridge disposed in the outlet and a plurality of check valves disposed serially within the cartridge for preventing backflow through the outlet and wherein vacuum effects are minimized.
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