US PATENT SUBCLASS 198 / 670
.~.~ With means for controlling flow or to assist conveying

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

618  DF  CONVEYOR SECTION {26}
657  DF  .~ Screw {11}
670.~.~ With means for controlling flow or to assist conveying

DEFINITION

Classification: 198/670

(under subclass 657) Apparatus including means coacting with said helical surface formation and/or with the load to regulate or facilitate the passage of the load.

(1) Note. The means includes either a passive structure or a moving surface.