US PATENT SUBCLASS 198 / 665
.~.~.~.~ And reversible

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

618  DF  CONVEYOR SECTION {26}
657  DF  .~ Screw {11}
662  DF  .~.~ Plural helical surface formations {4}
664  DF  .~.~.~ Transversing less than 360 degrees {1}
665.~.~.~.~ And reversible

DEFINITION

Classification: 198/665

(under subclass 664) Apparatus wherein means is provided to join the elements to the shaft in such a manner that the angular relationship of the elements to the longitudinal axis of the shaft can be reversed for the purpose of changing the direction of thrust of the surfaces.