US PATENT SUBCLASS 222 / 384
.~.~.~ With piston holding means

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}
383.1  DF  .~.~ Container-mounted pump {4}
384.~.~.~ With piston holding means

DEFINITION

Classification: 222/384

Dispensers under subclasses 383.1+ in which means is provided for holding or preventing motion of the pump or pulsator piston.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309, for similar means for adjusting discharge volume.

402, for similar means for holding the piston of a fluid pressure generating pump or pulsator.