US PATENT SUBCLASS 254 / 278
.~.~ Plural drums or drum with plural distinct sections

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.~.~ Plural drums or drum with plural distinct sections {7}
279  DF  .~.~.~> With vehicle for supporting at least one drum {2}
283  DF  .~.~.~> Having rotatable, cable guiding, pulley wheel element spaced from drums {2}
287  DF  .~.~.~> Juxtaposed to cable at single locus
288  DF  .~.~.~> With means affixing at least one drum to supporting base and allowing movement between drum and base {1}
290  DF  .~.~.~> Plural, distinct, drive motors {2}
293  DF  .~.~.~> Each drum having plural, distinct drive sources or discrete drive trains
294  DF  .~.~.~> Having common drive source or mechanically interlinked drive trains {10}

DEFINITION

Classification: 254/278

Plural drums or drum with plural distinct sections:

(under subclass 266) Apparatus including either (a) at least one other driven, cable-contacting drum rotatable about an axis fixed relative to another portion of the apparatus, or (b) a driven drum with two or more distinct, structurally separated, cable-contacting regions which each pull on either different cables or different ends of the same cable.

(1) Note. At least one of the drums claimed in the patents found in this and its indented subclasses is of the type driven device described as proper for subclass 264. The other drum may, however, be of the type described in part (c) of (2) Note for subclass 264.

SEE OR SEARCH THIS CLASS, SUBCLASS:

214+, for implements or apparatus for tensioning flexible material or for extracting stumps or poles including two or more rotatably driven drums.