US PATENT SUBCLASS 417 / 338
.~ Relatively movable pumping members driven by relatively movable working members


Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
338.~ Relatively movable pumping members driven by relatively movable working members {1}
339  DF  .~.~> Nonrotary pumping and fluid motor working members {5}


DEFINITION

Classification: 417/338

(under subclass 321) Apparatus in which two or more pumping members which are capable of or constrained to move relative to each other are driven by two or more motor working members which are capable of or constrained to move relative to each other.

(1) Note. The plural pumping members under this definition must each provide an output of fluid for external use. Therefore, a motor driven pump which is a mere auxiliary or ancillary of another motor driven pump (e.g., supplies motive fluid or cooling fluid for another motor driven pump) is not included under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

246+, for plural relatively movable pumping members driven by plural relatively movable working members wherein the pumping members serially act upon the pumped fluid.