US PATENT SUBCLASS 254 / 374
.~.~ Having noncircular or varying diameter, cable contacting perimeter

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}
374.~.~ Having noncircular or varying diameter, cable contacting perimeter

DEFINITION

Classification: 254/374

Having noncircular or varying diameter, cable contacting perimeter:

(under subclass 266) Apparatus wherein the cable-contacting portion of the perimeter of the drum either has a noncircular shape (e.g., square) or has a varying diameter along its rotational axis, (e.g., cone shaped).

SEE OR SEARCH CLASS

242, Winding, Tensioning, or Guiding,

602.1+, and 903 for a detail for a drum suitable for a winch or hoist, and subclass 613.2 for a spool drum of irregular cross section.