US PATENT SUBCLASS 222 / 256
.~.~ Follower combined with casing enclosed impeller

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}
252  DF  .~ Plural {9}
256.~.~ Follower combined with casing enclosed impeller {3}
257  DF  .~.~.~> Interconnected with movable nozzle {2}
260  DF  .~.~.~> Follower and impeller coaxial or parallel and interconnected {1}
262  DF  .~.~.~> Utilizing fluid pressure and/or motor

DEFINITION

Classification: 222/256

(under subclass 252) Dispensers having two discharge assistants, one being a follower and one being a casing enclosed impeller (such as a pump or a pulsator).

(1) Note. For the most part, the follower acts on the material in the supply container while the casing enclosed impeller receives material therefrom and discharges the same.

(2) Note. Discharge assistants, even though casing enclosed, which will not operate to increase pressure on the material dispensed, were not considered casing enclosed impellers. Those functioning merely to convey without increase in pressure or merely to agitate are examples.

SEE OR SEARCH THIS CLASS, SUBCLASS:

372+, for supply containers having no means for creating pressure on the contents which deliver to a chamber enclosing an impeller (i.e., a pump or pulsator) or to a chamber having a follower or other form of discharge assistant and from which the material is in turn discharged, and see the notes to such subclasses for related art.

386+, for containers having a follower therein, and see the notes for related art. SEE OR SEARCH CLASS

221, Article Dispensing,

226+, for article dispensing devices having plural discharge assisting means or discharge assisting means combined with manipulating means and in which at least one of the discharge assisting means is of the follower type.