US PATENT SUBCLASS 254 / 221
.~.~ With projections or apertures on drum for engagement with complementary formations on material or cable

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}
221.~.~ With projections or apertures on drum for engagement with complementary formations on material or cable

DEFINITION

Classification: 254/221

With projections or apertures on drum for engagement with complementary formations on material or cable:

(under subclass 213) Implements or apparatus in which the drum has projections or apertures located on its perimeter for engaging corresponding apertures or projections formed along the length of the flexible member or cable.

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372, for load-hauling or hoisting apparatus including a rotatably driven drum provided with projections or apertures on its circumference for interengagement with complementary formations on the cable.

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226, Advancing Material of Indeterminate Length,

52+, for feeding apparatus having means to engage longitudinally spaced modifications in a material of

indeterminate length.