US PATENT SUBCLASS 254 / 220
.~.~.~ Worm and worm wheel

Current as of: June, 1999
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254 /   HD   IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE

199  DF  PORTABLE IMPLEMENTS OR APPARATUS FOR TENSIONING FLEXIBLE MATERIAL OR FOR EXTRACTING STUMPS OR POLES {12}
213  DF  .~ Including rotatably driven drum for engaging either material or force transmitting cable {9}
219  DF  .~.~ Having intermeshing gears for driving drum {1}
220.~.~.~ Worm and worm wheel

DEFINITION

Classification: 254/220

Worm and worm wheel:

(under subclass 219) Implements or apparatus wherein at least two of the gears comprise a worm and a worm wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

296, and 343, for load-hauling or hoisting apparatus including a rotatably driven drum provided with a drive having two intermeshing gears of the worm and worm wheel type.