US PATENT SUBCLASS 417 / 554
.~.~.~ Ball type

Current as of: June, 1999
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417 /   HD   PUMPS

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

DEFINITION

Classification: 417/554

(under subclass 552) Apparatus in which the valve comprises a member in the shape of a ball or sphere.

SEE OR SEARCH CLASS

137, Fluid Handling,

533.11+, for a ball-type reciprocating direct responsive valve.