Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1996-09-25
1998-03-03
Matecki, Katherine
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254371, B66D 100
Patent
active
057226407
ABSTRACT:
A sheave for advancing a rope by application to said sheave of rotational forces includes a central hub with opposed sheave surfaces each of the opposed surfaces being provided with alternating projections and valleys. The projections of the first one of the surfaces being aligned with a valley of the opposed second surface, each of the projections having a generally flat outer surface which is provided with rounded edges, the valleys being tapered in width toward the hub of the sheave and having a generally flat floor surface, the center of each the valley having a ridge projecting from the floor surface, the ridges each being of a height extending above its associated valley floor surface that is substantially less than the height of the projections.
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