US PATENT SUBCLASS 29 / 893.31
.~.~.~ Worm gear

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
893  DF  .~ Gear making {3}
893.3  DF  .~.~ Gear shaping {7}
893.31.~.~.~ Worm gear

DEFINITION

Classification: 29/893.31

Worm gear:

(under subclass 893.3) Process for the shaping of a gear of the kind having a thread type element which revolves and intermeshes with the driven elements of a rack or wheel device.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

425+, and 458+ for worm type gear structure.