US PATENT SUBCLASS 417 / 241
.~ Movable confining means

Current as of: June, 1999
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417 /   HD   PUMPS

240  DF  INERTIA LIQUID PISTON (E.G., MOMENTUM, ETC.) {1}
241.~ Movable confining means

DEFINITION

Classification: 417/241

(under subclass 240) Apparatus in which the liquid is set in motion by the absolute movement of the means confining the liquid.