US PATENT SUBCLASS 222 / 402.12
.~.~.~ With discharge orifice contamination guard

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}
394  DF  .~ Fluid pressure {9}
402.1  DF  .~.~ Valve actuated by nozzle or through valve outlet {13}
402.12.~.~.~ With discharge orifice contamination guard

DEFINITION

Classification: 222/402.12

(under subclass 402.1) Dispensers having means associated with the opening through which the dispensed material discharges to the atmosphere to protect the material at the opening from exposure to the atmosphere when not dispensing.