Traversing hoists – Having means facilitating assembly or disassembly – Of counterweight from hoist
Patent
1997-01-29
1999-08-24
Brahan, Thomas J.
Traversing hoists
Having means facilitating assembly or disassembly
Of counterweight from hoist
212195, B66C 2372
Patent
active
059414014
ABSTRACT:
A ring-supported lift crane is provided with a counterweight handling system to facilitate repositioning of the crane. The ring-supported crane includes a ring, a crane upper works and a crane lower works, a boom supported on rollers on the ring and a counterweight assembly also supported on rollers on the ring. The counterweight assembly preferably includes a counterweight carrier on which at least one stack of counterweight boxes or units are placed. A counterweight holder is interposed between the at least one stack of counterweight units and the counterweight carrier with a friction reduction device, such as rollers or slider pads, interposed between the counterweight holder and the counterweight carrier. When the ring-supported crane is to be repositioned for a second lift at a construction site, the counterweight holder with the stack of counterweight units is moved off of the counterweight carrier onto a separate counterweight support member, which may be mobile or stationary. This speeds up the relocation process, as the counterweight units do not have to be individually unstacked before the ring and crane can be moved.
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Dreger Jeffery L.
Lanning John M.
Petzold Terry L.
Brahan Thomas J.
Manitowoc Crane Group, Inc.
Shurtz Steven P.
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