US PATENT SUBCLASS 417 / 543
.~.~ Direct contact with confined compressible fluid

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
540  DF  .~ Having pulsation dampening fluid receiving space {3}
543.~.~ Direct contact with confined compressible fluid {1}
544  DF  .~.~.~> Manually operated pump

DEFINITION

Classification: 417/543

(under subclass 540) Apparatus in which said means comprises an enclosed space having a compressible fluid confined therein, said compressible fluid being in direct contact with the portion of the pump fluid entering said space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

541, for a confined compressible fluid dampening chamber carried by the pumping member.

542, for combined inlet and discharge pulsation dampening chambers of the confined compressible fluid type.

SEE OR SEARCH CLASS

137, Fluid Handling,

207, for a surge suppressor of the type comprising a gas stored over a body of liquid.