US PATENT SUBCLASS 74 / 424.7
.~.~.~ Screw

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

Internet Version by PATENTEC © 1999      Terms of Use


74 /   HD   MACHINE ELEMENT OR MECHANISM

640  DF  GEARING {31}
412 R  DF  .~ Directly cooperating gears {8}
424.5  DF  .~.~ Spiral {4}
424.7.~.~.~ Screw

DEFINITION

Classification: 74/424.7

(under subclass 424.5) Gearing, the two gears being spiral and nonintersecting.

SEE OR SEARCH THIS CLASS, SUBCLASS:

425+, for worm gearing.

458, for worm teeth.