US PATENT SUBCLASS 417 / 267
.~.~ Series double acting


Current as of: June, 1999
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417 /   HD   PUMPS

244  DF  SUCCESSIVE STAGES {8}
254  DF  .~ Reciprocating rigid stages {8}
267.~.~ Series double acting


DEFINITION

Classification: 417/267

(under subclass 254) Apparatus in which the pumping members which successively act upon the pump fluid are each of the type which act to pump separate streams of fluid in both directions of reciprocation, i.e., each pumping member of the series is of the double acting type.