US PATENT SUBCLASS 417 / 552
.~.~ Reciprocating


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
545  DF  .~ Valved piston {7}
552.~.~ Reciprocating {2}
553  DF  .~.~.~> Annular
554  DF  .~.~.~> Ball type


DEFINITION

Classification: 417/552

(under subclass 545) Apparatus in which the valve comprises a member movable in a to-and-fro motion toward and away from its seat.

SEE OR SEARCH CLASS

137, Fluid Handling,

528+, for a reciprocating direct responsive valve.