US PATENT SUBCLASS 417 / 508
.~.~ Including mechanical actuation


Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
507  DF  .~ Distributor moved by separate fluid responsive surface {1}
508.~.~ Including mechanical actuation


DEFINITION

Classification: 417/508

(under subclass 507) Apparatus in which in addition to the fluid reactive surface for moving the distributor there is also provided means to move said distributor which is interconnected with or abutted by the pumping member or a drive transmission element associated therewith in a manner which causes the distributor to be mechanically shifted upon movement of the pumping member or transmission element through a pumping operation cycle.