US PATENT SUBCLASS 417 / 481
.~ Oscillating pumping member

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
481.~ Oscillating pumping member {2}
482  DF  .~.~> Inlet distributor in abutment wall for pumping member {1}
484  DF  .~.~> Distributor in pumping member

DEFINITION

Classification: 417/481

(under subclass 437) Apparatus in which the wall portion is a rigid member and moves to-and-fro in an arcuate path of less than 360 deg..