US PATENT SUBCLASS 417 / 510
.~ Mechanically actuated distributor

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
510.~ Mechanically actuated distributor {5}
511  DF  .~.~> Piston carried distributor, one frictionally engages chamber wall, drive rod integral with other (e.g., piston driven by valve element through lost motion connection, etc.) {2}
514  DF  .~.~> Distributor in piston
515  DF  .~.~> Plural pumping chambers {1}
518  DF  .~.~> Common element forms inlet and discharge distributor {1}
520  DF  .~.~> Distributor abutted by or frictionally engaged with pumping member

DEFINITION

Classification: 417/510

(under subclass 437) Apparatus in which the means for controlling flow of pump fluid into or out of the pump chamber comprises a distributor which is interconnected with or adapted to be abutted by the pumping member or a drive transmission element associated therewith in a manner which causes said distributor to be mechanically shifted upon movement of the pumping member or transmission element through a pumping operation cycle.

(1) Note. A moving cylinder having a port which cooperates with a stationary member for controlling the flow of pump

fluid to or from the pump chamber is not considered to be a mechanically actuated distributor under this definition, such subject matter being classified in subclasses 460+, above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

443+, for means for actuating a pressure responsive distributor to an open position responsive to pumping member position.

456, for an expansible chamber pump having relatively movable serial distributors in which one of said distributors is of the mechanically actuated type.

460+, for a moving cylinder which cooperates with a stationary member for controlling inlet and discharge of pump fluid to or from the pump chamber, and see (1) Note, above. 490+, for an inlet or discharge port formed in a pumping member or chamber wall which is controlled by an element carried by the other.

508, for a distributor which is moved by a separate fluid reactive surface as well as a mechanical means.

509, for a distributor which is formed in part by a traversed chamber wall portion, the wall portion usually being moved by interconnection or frictional engagement with the pumping member.