US PATENT SUBCLASS 166 / 108
.~.~ Piston actuates foot valve

Current as of: June, 1999
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166 /   HD   WELLS

105  DF  WITH EDUCTION PUMP OR PLUNGER {5}
107  DF  .~ Receptacles {4}
108.~.~ Piston actuates foot valve

DEFINITION

Classification: 166/108

(under subclass 107) Devices in which a pump or plunger piston is mechanically connected with a valve at the bottom portion of the container so as to close the valve when the piston is at the end of its lifting stroke.