US PATENT SUBCLASS 198 / 674
.~.~ Including drive means

Current as of: June, 1999
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198 /   HD   CONVEYORS: POWER-DRIVEN

618  DF  CONVEYOR SECTION {26}
657  DF  .~ Screw {11}
674.~.~ Including drive means {1}
675  DF  .~.~.~> Having reversible or variable speed

DEFINITION

Classification: 198/674

(under subclass 657) Apparatus provided with means to rotate the helical surface formation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

667, for drive means located between coupled helical surfaces.