US PATENT SUBCLASS 222 / 375
.~.~ With antileak or antisiphon means or full-stroke mechanism

Current as of: June, 1999
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222 /   HD   DISPENSING

251  DF  WITH DISCHARGE ASSISTANT (E.G., IMPELLER, PUMP, CONVEYER, MOVABLE TRAP CHAMBER, ETC.) {30}
372  DF  .~ With material supply container and discharge assistant with casing (e.g., supply container and pump) {10}
375.~.~ With antileak or antisiphon means or full-stroke mechanism

DEFINITION

Classification: 222/375

(under subclass 372) Dispensers having (1) means to prevent leakage from the discharge passage, (2) means to prevent siphoning following operation of the discharge assistant and (3) means to insure a full stroke of the pump mechanism.

(1) Note. Pressure relief devices, as valves or expansion chambers, are included in the Class Definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72, for volume or rate of flow metering with by-pass, gas separation and/or anti-siphon means.

73, for volume or rate of flow metering with means for relieving or maintaining hose pressure.

108+, for means for catching or disposing of leakage, drip, or waste, including those which also return the same to the supply.

318, for means for by-passing a discharge assistant and/or for returning material from the discharge side thereof to the supply. 424, for miscellaneous dispensers having means to return material to the supply.

SEE OR SEARCH CLASS

137, Fluid Handling,

215+, for back flow or siphon preventing in fluid handling systems.

221, Article Dispensing,

245, for article dispensing devices having return stroke inhibiting means (full stroke-mechanism).

251, Valves and Valve Actuation,

34, for reverse flow prevention in fluid pressure type servo-motor valve actuators.