US PATENT SUBCLASS 198 / 662
.~.~ Plural helical surface formations


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



198 /   HD   CONVEYORS: POWER-DRIVEN

618  DF  CONVEYOR SECTION {26}
657  DF  .~ Screw {11}
662.~.~ Plural helical surface formations {4}
663  DF  .~.~.~> Separate, parallel formations supporting same load
664  DF  .~.~.~> Transversing less than 360 degrees {1}
666  DF  .~.~.~> Coupled end-to-end {2}
669  DF  .~.~.~> Of opposite hand


DEFINITION

Classification: 198/662

(under subclass 657) Apparatus wherein there are a plurality of helical surface formations.