US PATENT SUBCLASS 417 / 247
.~.~ Rotary

Current as of: June, 1999
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417 /   HD   PUMPS

244  DF  SUCCESSIVE STAGES {8}
246  DF  .~ Stages driven by relatively movable motor working members {1}
247.~.~ Rotary

DEFINITION

Classification: 417/247

(under subclass 246) Apparatus in which the pumping members and motor working members partake of a continuous, unidirectional, rotary movement about an axis.