B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/58.4
B63B 35/44 (2006.01) B63B 39/03 (2006.01) B63B 43/06 (2006.01) B66C 23/52 (2006.01)
Patent
CA 1073277
ABSTRACT OF THE DISCLOSURE : Vessel comprising a pair of laterally spaced elongated buoyancy hulls and vertically mounted thereon a plurality of hollow columns, distributed around the outer circumferential area of the vessel and supporting a work platform above the water level when the said hulls are submerged, the hulls containing water ballast compartments. The platform bears one or more heavy duty cranes, adapted for outboard handling of loads. At the lower end of the columns air chambers are provided in open connection with the surrounding water at their bottom ends. At their upper end these chambers have air valves for discharging air fr and supplying air to said chambers selectively controled by directions from a computer which is added to the crane operating device. Sensors and other measuring instruments are provided such as for continuously gauging the water levels in the different air compartments, the air pressure therein and the water pressure at the exit of these compartments to the open water, the top and swivel angles of the cranes, the hilt of the level and the weight of the crane loads. The data measured by these instruments are introduced into the said computer which controls by means of its computing results and predetermined computer programs, the said regulator air valves and thereby the water levels in the different air chambers onto a situation whereby the vessel is maintained substantially on an even keel during load handling by the cranes.
271322
Heerema Pieter S.
Horowitz Alexandre
Willemsen Henricus P.
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