US PATENT SUBCLASS 222 / 412
.~.~ Helically arranged projections (e.g., screws)

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}
410  DF  .~ Rotary {3}
412.~.~ Helically arranged projections (e.g., screws) {1}
413  DF  .~.~.~> Screw with terminal outlet only

DEFINITION

Classification: 222/412

(under subclass 410) Dispensers having a discharge assistant with helically arranged projections, either interrupted or continuous, e.g., screws.

SEE OR SEARCH THIS CLASS, SUBCLASS:

411, for hollow rotors having internal spiral projections, so that the discharge path lies axially of the rotor.

SEE OR SEARCH CLASS

48, Gas: Heating and Illuminating,

54, for screw carbid feeds. 100, Presses,

145+, for presses not elsewhere classified which concurrently compress and convey the material and in which the material is conveyed by a helix type compressor.

110, Furnaces,

110, for furnace feeding hoppers having screw feed.

198, Conveyors: Power-Driven,

64, and subclass 467.1, 513, 545, 548, 550.6, 550.10, 582, 608, 625, and 657+ for screw feeds.

241, Solid Material Comminution or Disintegration,

246+, for screw feeds to disk or cone mills.

291, Track Sanders,

33, for screw feeds.

406, Conveyors: Fluid Current,

56+, for screw feeds.