US PATENT SUBCLASS 222 / 291
.~.~ Retractable projections

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
291.~.~ Retractable projections

DEFINITION

Classification: 222/291

(under subclass 282) Dispensers having a movable discharge assistant having blades or other projections which are alternatively projected from and withdrawn into the body of the discharge assistant as it moves, and means to vary the extent of maximum projection.