US PATENT SUBCLASS 417 / 340
.~.~.~ Common expansible chamber for oppositely movable working members

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
338  DF  .~ Relatively movable pumping members driven by relatively movable working members {1}
339  DF  .~.~ Nonrotary pumping and fluid motor working members {5}
340.~.~.~ Common expansible chamber for oppositely movable working members {1}
341  DF  .~.~.~.~> Mechanically interconnected

DEFINITION

Classification: 417/340

(under subclass 339) Apparatus in which the relatively movable working members form opposite walls of a common expansible working chamber adapted to receive pressure or combustion working fluid, said working members moving toward and away from each other during expansion and contraction of the expansible working chamber.