US PATENT SUBCLASS 406 / 54
.~.~.~ With material recirculating screw

Current as of: June, 1999
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406 /   HD   CONVEYORS: FLUID CURRENT

51  DF  WITH DIVERSE POWER-DRIVEN CONVEYOR {4}
52  DF  .~ Rotary {5}
53  DF  .~.~ Screw {3}
54.~.~.~ With material recirculating screw

DEFINITION

Classification: 406/54

With material recirculating screw:

(under subclass 53) Subject matter wherein a second load moving helical surface is provided which serves to return at least a portion of the load from the discharge end of the first helix to the intake of the same.

SEE OR SEARCH CLASS

366, Agitating,

84+, for subject matter relating to the working of rubber or heavy plastic in parallel screw conveyors.