US PATENT SUBCLASS 254 / 322
.~.~.~.~.~ Frictional brake assembly having rotating, wheel structure and shiftable shoe or band

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}
321  DF  .~.~.~.~ Including means for preventing or retarding rotation of one or more drums in at least one direction {1}
322.~.~.~.~.~ Frictional brake assembly having rotating, wheel structure and shiftable shoe or band

DEFINITION

Classification: 254/322

Frictional brake assembly having rotating, wheel structure and shiftable shoe and band:

(under subclass 321) Apparatus wherein the means consist of a rotating, wheel structure which either (a) forms a portion of one of the drums, or (b) is mechanically connected to and has its rotation correlated with and dependent upon at least one of the drums, and an element shiftable into and out of contact with the wheel structure, the resistance caused by the surface friction created during the contact of the wheel structure and the element is relied upon to slow down or stop the rotation of at least one of the drums.