US PATENT SUBCLASS 417 / 468
.~.~ Having integral pump piston or external pumping face

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
460  DF  .~ Moving cylinder {7}
468.~.~ Having integral pump piston or external pumping face

DEFINITION

Classification: 417/468

(under subclass 460) Apparatus in which the movable cylinder has either (1) an external surface or (2) a member rigidly secured externally thereof; said surface or member forming a piston type pumping member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258, for successive stage pumps having a reciprocating cylinder with an integral piston or external pumping face.