US PATENT SUBCLASS 37 / 249
.~.~.~ Including screw-type auger for first stage

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
244  DF  .~ Motorized rotary excavating tool {8}
248  DF  .~.~ Diverse multistage rotary tools or tool portions (e.g., feeding and throwing, etc.) {1}
249.~.~.~ Including screw-type auger for first stage {2}
250  DF  .~.~.~.~> Augers on separate shafts
251  DF  .~.~.~.~> And centrifugal impeller for final stage {1}

DEFINITION

Classification: 37/249

Including screw-type auger for first stage:

(under subclass 248) Apparatus wherein the implement or section adapted to accomplish the primary step comprises a helical vane means arranged to rotate upon its axis.

SEE OR SEARCH CLASS

406, Conveyors: Fluid Current,

53+, for a general purpose, fluid current conveyor cooperating with a driven screw-type conveyor.