US PATENT SUBCLASS 417 / 559
.~ Having pumping chamber pressure responsive distributor

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
559.~ Having pumping chamber pressure responsive distributor {8}
560  DF  .~.~> Single unitary element forms inlet and discharge distributor
561  DF  .~.~> Pumping member position responsive stop for distributor
562  DF  .~.~> Having means on pumping member for accommodating distributor portion
563  DF  .~.~> Similar inlet and discharge distributors of different size or material {1}
565  DF  .~.~> Hinged inlet and discharge distributors in aligned conduits
566  DF  .~.~> Nonmetallic inlet or discharge distributor
567  DF  .~.~> Inlet and discharge distributors in coaxial ports {1}
569  DF  .~.~> Distributor positioned opposite pumping member end face {2}

DEFINITION

Classification: 417/559

(under subclass 437) Apparatus in which the means for

controlling the flow of fluid into or the discharge of fluid from the chamber comprises valve means, said valve means being of the type which moves to open or close position responsive to a pressure differential in the pumping chamber and the inlet or discharge conduits.

SEE OR SEARCH THIS CLASS, SUBCLASS:

297+, for condition responsive means for modifying the operation of a cyclically operated valve (e.g., check valve).

427, for plural pumps having distributors which are individually adjusted.

447, for pumping chamber pressure responsive distributors with separate means to bias same open.

458+, for relatively movable serial pressure responsive distributors. 479, for a distributor formed from an integral portion of a flexible wall pumping member.

480, for a distributor in a flexible wall pumping member.

482+, for an oscillating pumping member with an inlet distributor in an abutment wall for the pumping member.

483, and 484, for an oscillating pumping member having a distributor positioned therein.

486+, for a single inlet or discharge distributor for a chamber having plural pumping members.

496, for a chamber pressure responsive distributor in serial relationship with a pumping member controlled port.

523+, for plural pumping chambers including a valved pumping member.

531+, for plural pumping chambers with a common element which forms an inlet or discharge distributor.

536+, for plural pumping chambers at opposite ends of a reciprocating pumping member with inlet and discharge distributors positioned laterally of the pumping member path.

538, for aligned pumping chambers with inlet and discharge distributors at adjacent ends of the aligned chambers.

545+, for valved pistons and see the search notes thereto for other valved pistons.

SEE OR SEARCH CLASS

137, Fluid Handling,

511+, for direct response valves, per se, and see subclasses 512+ for plural direct response valves. The claiming of a direct response valve mounted in a cylinder or cylinder head or the like does not preclude classification in Class 137. Also the claiming of both an inlet and outlet valve does not preclude classification in Class 137 if no pumping member is claimed.