Pump with wash flow path for washing displacement piston and seal
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United States of America Patent
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Oct 21, 2014
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app pub date -
May 28, 2010
filing date -
May 28, 2009
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Abstract
In general, a piston-type pump includes a wash flow path that allows a wash liquid such as water to pass through to provide washing and cleaning as the pump operates. The pump may be used in precision liquid dispensing systems and particularly with liquid solutions that have a tendency to precipitate solid particulate. By washing a portion of the pump piston, the liquid solution being dispensed and any solid particulates may be carried away and removed from the pump.
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