US PATENT SUBCLASS 417 / 203
.~.~ Preceding diverse pump


Current as of: June, 1999
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417 /   HD   PUMPS

199.1  DF  DIVERSE PUMPS {5}
201  DF  .~ Including rotary nonexpansible chamber type {2}
203.~.~ Preceding diverse pump


DEFINITION

Classification: 417/203

(under subclass 201) Apparatus in which the diverse pumps are arranged such that the entire or a substantial portion of the output of one is directed to the second so as to be serially acted upon thereby, the rotary nonexpansible chamber-type pump being upstream of the diverse pump so as to feed fluid thereto with the diverse pump acting as a second stage.