US PATENT SUBCLASS 254 / 319
.~.~.~.~.~ Components having frictional contact surface

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

264  DF  APPARATUS FOR HAULING OR HOISTING LOAD, INCLUDING DRIVEN DEVICE WHICH CONTACTS AND PULLS ON CABLE {4}
266  DF  .~ Device includes rotatably driven, cable contacting drum {34}
278  DF  .~.~ Plural drums or drum with plural distinct sections {7}
294  DF  .~.~.~ Having common drive source or mechanically interlinked drive trains {10}
317  DF  .~.~.~.~ Including clutch mechanism in drive having coaxial, rotatable, relatively shiftable axially, power transmitting components {2}
319.~.~.~.~.~ Components having frictional contact surface

DEFINITION

Classification: 254/319

Components having frictional contact surface:

(under subclass 317) Apparatus in which the surface friction created by the contact of the rotatable components of the clutch mechanism is solely relied upon for the transmitting of rotary motion from the one component to the other.