Traversing hoists – Having means facilitating assembly or disassembly – Of boom sections
Reexamination Certificate
1998-12-04
2001-08-28
Brahan, Thomas J. (Department: 3652)
Traversing hoists
Having means facilitating assembly or disassembly
Of boom sections
C212S179000, C212S195000
Reexamination Certificate
active
06279764
ABSTRACT:
The invention relates to a hoisting device comprising a boom and a mast, both with one end pivotably arranged to each other, a counterweight attached to the free end of the mast and hoisting means connected to at least the free end of the boom, wherein said free end of the mast and said free end of the boom are connected by cables.
Such hoisting devices are generally known, especially from U.S. Pat. No. 3,921,815. When such hoisting devices serve for hoisting heavy and/or large voluminous loads, these cranes are bulky and heavy.
Large mobile cranes with for instance caterpillar tracks as displacing elements can only be disassembled into large units such as jib, counterweight and chassis, and can in fact only be transported by ship or large truck in fact to locations for hoisting jobs. In the case transport takes place by truck, a special license is generally required for such a journey in respect of standard dimensions and weights for normal road traffic being exceeded.
Hoisting operations can often be performed on navigable water, but in other cases hoisting operations have to be carried out far inland, wherein transport overland forms a particular problem.
The object of the present invention is to provide a hoisting device which is suitable for hoisting loads up to 10,000 tons to a height of 100 metres, which can be transported easily and at low cost, and which requires a short time duration for putting into use at the location of the hoisting job, irrespective of the required hoisting height and load weight.
This object is achieved in that the hoisting device is assembled from components or elements, the largest of which has dimensions which do not exceed those of a standardized sea container and that both pivotably arranged ends of the boom and mast respectively, are pivotably arranged to a support plate, which is supported on the same base as the counterweight.
It will be apparent that transporting means are present all over the world for transporting standardized sea containers. These are for transport by sea and by road, by (See further original description page 2, line 1) rail or by air. Because according to the invention the hoisting device can also be disassembled into components which do not exceed the dimensions of the normal container for transport, these can be transported in the same easy manner as a normal container or therein.
The components which are intended for the mast parts (posts) are preferably tubular. These are substantially under strain of axial pressure. Not only can they be coupled as containers (if necessary) during transport, but they are also embodied such that they can form a post with coupling options for arranging shores, wind bracings and additional framework elements in order to arrive at an assembled post comparable to a kite construction.
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Brahan Thomas J.
Mammoet Decalift International B.V.
Pauly Joan H.
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