US PATENT SUBCLASS 417 / 97
.~.~.~ Relatively movable chambers

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
92  DF  .~ Liquid piston {6}
93  DF  .~.~ Moving contracting chamber {5}
97.~.~.~ Relatively movable chambers

DEFINITION

Classification: 417/97

(under subclass 93) Apparatus in which a plurality of chamber means are provided, said chambers being moved relative to one another.