US PATENT SUBCLASS 417 / 268
.~.~ Unidirectionally acting rigidly connected pumping members

Current as of: June, 1999
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417 /   HD   PUMPS

244  DF  SUCCESSIVE STAGES {8}
254  DF  .~ Reciprocating rigid stages {8}
268.~.~ Unidirectionally acting rigidly connected pumping members

DEFINITION

Classification: 417/268

(under subclass 254) Apparatus in which the successive pumping members are unitary with one another, and are operative in the same direction of motion for the pumping (i.e., discharging) stroke.