Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate
2008-05-06
2008-05-06
Marcelo, Emmanuel M (Department: 3654)
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
Reexamination Certificate
active
07367547
ABSTRACT:
Provided is a lifting device comprising: a hook or clip; secured to the hook or clip, one or more first pulleys; a second hook or clip; secured to the second hook or clip, (i) a release mechanism comprising a second pulley and a releasable lock for an engaged flexible serpentine article and, optionally, (ii) one or more third pulleys, the second and third pulleys collectively the beta pulleys; and the flexible serpentine article engaged, at a first end, to one or the other hook or clip, and serially engaged through the first pulleys and beta pulleys, to provide a nominal two-fold or greater mechanical advantage, wherein the other end of the serpentine article is last engaged, among above recited elements, by one of the first pulleys.
REFERENCES:
patent: 3924751 (1975-12-01), Ballenger
patent: 4365834 (1982-12-01), Parkinson et al.
patent: 5354035 (1994-10-01), Helgren
patent: 6056273 (2000-05-01), Smith
patent: 6908074 (2005-06-01), Eiwan
Design Research & Development Corp.
Marcelo Emmanuel M
LandOfFree
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