US PATENT SUBCLASS 417 / 567
.~.~ Inlet and discharge distributors in coaxial ports

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
559  DF  .~ Having pumping chamber pressure responsive distributor {8}
567.~.~ Inlet and discharge distributors in coaxial ports {1}
568  DF  .~.~.~> Transverse to axis of pumping member

DEFINITION

Classification: 417/567

(under subclass 559) Apparatus comprising an inlet and discharge valve positioned in an inlet and discharge port, respectively, which form seats for said valves, the central axis of the inlet seat port coinciding with the central axis of the discharge seat port.

(1) Note. Either or both of the ports may be annular so long as the axes of the ports coincide.

SEE OR SEARCH THIS CLASS, SUBCLASS:

558, for inlet and discharge distributors in coaxial ports in which the port (seat) for one is formed in the other; i.e., the one distributor is carried by and controls a passage in the other.