B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
212/24, 212/8
B66C 23/82 (2006.01) B66C 23/60 (2006.01) B66C 23/66 (2006.01) B66D 1/44 (2006.01) B66D 1/50 (2006.01)
Patent
CA 1227771
HOISTING MEANS Abstract Hoisting arrangement having a boom (2) or a crane with two separately driven hoist wires (10, 16) each with its individual cargo hook (7, 8). The cargo hooks along with the hoist wires are used for various lifting operations. The hoist wires and a topping wire (5) are operated by their respective winches (9, 15 and 4). The hoist wires (10, 16) are connected via their winches (9, 15) to a common power supply system via a selection valve (34) whereby a constant tension is exerted in the hoist wire. The winches (9, 15) are adapted to pay out hoist wire if the pull in the hoist wire exceeds this constant tension and to draw in hoist wire if the pull falls below the constant tension.
442561
A/s Hydraulik Brattvaag
Kirby Eades Gale Baker
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