US PATENT SUBCLASS 406 / 59
.~.~.~.~.~ Plural screws

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}
56  DF  .~.~.~ Feeding to fluid conveyor inlet {3}
57  DF  .~.~.~.~ Feeds to inlet of blower or pump {2}
59.~.~.~.~.~ Plural screws

DEFINITION

Classification: 406/59

Plural screw:

(under subclass 57) Subject matter wherein the screw conveyor comprises two or more discrete helical load moving surfaces.

(1) Note. This subclass includes screw conveyors having two or more discrete helixes on a common shaft.