US PATENT SUBCLASS 417 / 479
.~ Distributor formed from integral portion of flexible wall pumping member

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
479.~ Distributor formed from integral portion of flexible wall pumping member

DEFINITION

Classification: 417/479

(under subclass 437) Apparatus in which the movable wall portion of said chamber is formed of flexible material and in which the means for controlling pumped fluid into or out of said chamber is formed in part (e.g., movable distributor portion or seat therefor) by an integral portion of said flexible material.