US PATENT SUBCLASS 417 / 457
.~.~ Including distributor formed by moving cylinder or liner

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
456  DF  .~ Relatively movable serial distributors {2}
457.~.~ Including distributor formed by moving cylinder or liner

DEFINITION

Classification: 417/457

(under subclass 456) Apparatus in which a part of the pump chamber wall which is traversed by the pumping member (i.e., cylinder or liner) has an absolute motion and forms or carries a part forming the movable element of at least one of said serially arranged distributors.