US PATENT SUBCLASS 222 / 252
.~ Plural

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.~ Plural {9}
253  DF  .~.~> With material-operated differential piston
254  DF  .~.~> Three or more in series
255  DF  .~.~> Pumps only
256  DF  .~.~> Follower combined with casing enclosed impeller {3}
263  DF  .~.~> Utilizing fluid pressure and/or motor
264  DF  .~.~> Rotors with concentrically arranged sets of axial trap chambers
265  DF  .~.~> In sets {6}
278  DF  .~.~> Alternatively usable {1}
280  DF  .~.~> Single outlet formed by plural discharge assistants {1}

DEFINITION

Classification: 222/252

(under subclass 251) Dispensers having at least two distinct discharge assistants claimed in combination.

(1) Note. The plurality may be arranged in series and/or in parallel. One may be an arrangement to apply fluid under

pressure directly to the material to be dispensed to cause dispensing.

(2) Note. Plural elements which act together as a single discharge assistant have been so treated (as plural vanes or blades, plural screws, plural movable sequentially operable traps, etc.) but where pumps or pulsators have plural chambers, each chamber having a forcing device therein, the structure has been treated as plural and not as a single pump or pulsator with plural cylinders.

SEE OR SEARCH THIS CLASS, SUBCLASS:

135+, for this subject matter where there are at least two sources of material to be dispensed.

216+, for combinations of agitator and/or ejector for removing and/or assisting in removing material from either (1) a conveyor type discharge assistant having trap chambers or grooves, or (2) movable trap chambers. 226+, for this subject matter in series arrangement, the first of the series being an agitator.

SEE OR SEARCH CLASS

100, Presses,

138+, for diverse type presses not otherwise classified in which one of the presses is of the type which forwards material while it compresses it.

198, Conveyors: Power-Driven, appropriate subclasses for plural conveyors, including 570+.

221, Article Dispensing,

224+, for article dispensing devices having plural discharge assisting means or discharge assisting means combined with manipulating means.