US PATENT SUBCLASS 417 / 201
.~ Including rotary nonexpansible chamber type

Current as of: June, 1999
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417 /   HD   PUMPS

199.1  DF  DIVERSE PUMPS {5}
201.~ Including rotary nonexpansible chamber type {2}
202  DF  .~.~> Diverse pump controlled by rotary pump condition
203  DF  .~.~> Preceding diverse pump

DEFINITION

Classification: 417/201

(under subclass 199.1) Apparatus in which one of the diverse pumps comprises a pumping member which has unidirectional rotary motion about a fixed axis and acts to pump fluid by a centrifugal, centripetal or screw effect.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200, for the combination of a centrifugal pump and a diverse pump for priming the centrifugal pump with liquid level responsive control of one of the pumps or the pump fluid.