US PATENT SUBCLASS 417 / 451
.~ Valve element mounted in fixed chamber wall removable with pumping member

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
451.~ Valve element mounted in fixed chamber wall removable with pumping member {1}
452  DF  .~.~> By separable engageable connecting elements {1}

DEFINITION

Classification: 417/451

(under subclass 437) Apparatus in which there is a valve structure located in a stationary wall of the expansible chamber and there are means carried by the valve structure which cooperates with the pumping member, to permit the removal of the valve structure along with the pumping member from the expansible chamber.