US PATENT SUBCLASS 222 / 303
.~.~.~.~ Groove or trap blocking 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}
282  DF  .~ With discharge volume varying means {12}
293  DF  .~.~ Rotor having plural adjustable parts of rotor form {2}
295  DF  .~.~.~ Axially adjustable {5}
303.~.~.~.~ Groove or trap blocking means {1}
304  DF  .~.~.~.~.~> Axial pocket trap

DEFINITION

Classification: 222/303

(under subclass 295) Dispensers in which one rotor part has either (1) one or more trap chambers therein, or (2) peripheral grooves, and the second relatively adjustable rotor part has one or more elements to block or fill such trap chambers or grooves to different extents to vary their volume upon relative axial adjustment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

292, for related structures where the relative motion is radial of the rotor.