US PATENT SUBCLASS 417 / 391
.~.~ Motor discharge into or upstream of pumping chamber

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
375  DF  .~ Fluid motor {9}
391.~.~ Motor discharge into or upstream of pumping chamber

DEFINITION

Classification: 417/391

(under subclass 375) Apparatus in which the pump is of the type having an expansible pumping chamber, the exhaust motive fluid from the fluid motor being directed into the pumping chamber or into the pump fluid before the pump fluid enters the expansible pumping chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

377, for a fluid motor driven pump in which the fluid discharged by the pump flows through the motor working chamber.