US PATENT SUBCLASS 198 / 672
.~.~ Including bearing means

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

618  DF  CONVEYOR SECTION {26}
657  DF  .~ Screw {11}
672.~.~ Including bearing means {1}
673  DF  .~.~.~> Bearing means directly engages periphery of the helical surface formation

DEFINITION

Classification: 198/672

(under subclass 657) Apparatus provided with means for sustaining the helical surface formation for rotation.