US PATENT SUBCLASS 417 / 265
.~.~ Relatively movable


Current as of: June, 1999
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417 /   HD   PUMPS

244  DF  SUCCESSIVE STAGES {8}
254  DF  .~ Reciprocating rigid stages {8}
265.~.~ Relatively movable


DEFINITION

Classification: 417/265

(under subclass 254) Apparatus in which the successive pumping members are capable of or constrained to move relative to one another incident to the pumping operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

256+, for oppositely moving valved pumping members which successively act on the pump fluid.