US PATENT SUBCLASS 417 / 537
.~.~.~.~.~ All distributors positioned on same side of pumping chamber

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
521  DF  .~ Plural pumping chambers {7}
534  DF  .~.~ Chambers formed at opposite ends of rectilinearly moving pumping member {1}
535  DF  .~.~.~ All discharge distributors positioned laterally of pumping member path {1}
536  DF  .~.~.~.~ Inlet and discharge distributors positioned laterally of pumping member path {1}
537.~.~.~.~.~ All distributors positioned on same side of pumping chamber

DEFINITION

Classification: 417/537

(under subclass 536) Apparatus in which all the valves are positioned on one side of a plane parallel to and extending through the axis of the working member.