Pumps – With condition responsive pumped fluid control – Normally open bypass or relief passage closed by increased...
Patent
1993-06-21
1995-03-14
Bertsch, Richard A.
Pumps
With condition responsive pumped fluid control
Normally open bypass or relief passage closed by increased...
417310, 137107, F04B 4900
Patent
active
053972198
ABSTRACT:
An integral liquid pump and drainback valve for use in pumping popcorn popping oil. A two-part housing is formed with one part having cavities forming inlet and outlet passages extending from an impeller cavity. A second part is formed with inlet and outlet ports and shuttle valve cavity connecting those ports. The inlet and outlet passages and the inlet and outlet ports respectively are in fluid communication with each other when the two parts are secured to each other. A resilient biasing means in the shuttle valve cavity moves the shuttle to a position wherein a fluid path is provided between the inlet and outlet ports when the pump impeller is not driven.
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Bertsch Richard A.
C. Cretors & Company
Kocharov M.
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