US PATENT SUBCLASS 74 / 458
.~.~ Worm and helical

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

640  DF  GEARING {31}
457  DF  .~ Teeth {3}
458.~.~ Worm and helical {1}
459  DF  .~.~.~> Nuts

DEFINITION

Classification: 74/458

(under subclass 457) Devices directed to the structure and details of worm and helical gear teeth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.7, 425+ and 500, for other screw and worm gearing.

497, for cam type motion transmitting steering gear.