US PATENT SUBCLASS 198 / 675
.~.~.~ Having reversible or variable speed

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

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

DEFINITION

Classification: 198/675

(under subclass 674) Apparatus wherein the means to rotate may be modified to change the direction or rate of rotation of the formation.