Disposable low-cost pump in a container for liquid color dispensing
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United States of America Patent
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Aug 12, 2014
Grant Date -
Aug 18, 2011
app pub date -
Feb 16, 2010
filing date -
Feb 16, 2010
priority date (Note) -
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Abstract
A pump has a PVC “T” shaped member having an inlet, an outlet and an interior pumping chamber positioned between the inlet and outlet; a piston displaceable into the chamber; an air cylinder for driving the piston into the chamber; a spring for biasing the piston outwardly from the chamber in opposition to force applied by the air cylinder; a washer-urethane disk check valve at the conduit inlet permitting fluid flow into the chamber but precluding fluid flow out of the chamber responsively to piston displacement into the chamber; and a washer-urethane disk check valve at the conduit outlet permitting fluid flow out of the chamber responsively to fluid pressure increase resulting from piston displacement into the chamber.
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