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
2008-08-08
2010-12-21
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
C254S378000, C254S388000
Reexamination Certificate
active
07854423
ABSTRACT:
A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to one or more portions of the frame. A plurality of head blocks can be connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up can maintain a predetermined fleet angle between a take off point from the drum and the head block.
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“Cyclorama Batten Systems”,Regional Performing Arts Center, Philadelphia, PA, (Dec. 15, 1999), 3 pgs.
Daktronics Hoist, Inc.
Marcelo Emmanuel M
Schwegman Lundberg & Woessner, P.A.
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