Ships – Floating platform – Multiple leg
Patent
1978-06-07
1980-11-04
Blix, Trygve M.
Ships
Floating platform
Multiple leg
114125, 212146, B63B 3502
Patent
active
042313139
ABSTRACT:
A 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 hulls are submerged, the hulls containing water ballast compartments. The platform supports 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 ends these chambers have air valves for discharging air from and supplying air to the chambers selectively controlled 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 vessel and the weight of the crane loads. The data measured by these instruments are introduced into the computer which controls the regulator air valves and thereby the water levels in the different air chambers whereby the vessel is maintained substantially on an even keel during load handling by the cranes.
REFERENCES:
patent: 2887976 (1959-05-01), Hanna
patent: 2889795 (1959-06-01), Parks
patent: 3349740 (1967-10-01), Field
patent: 3537412 (1970-11-01), Henderson
patent: 3716154 (1973-02-01), Berg
patent: 3785313 (1974-01-01), Rosenberg
patent: 3835800 (1974-09-01), Lloyd
patent: 3894503 (1975-07-01), McClure
patent: 3928754 (1975-12-01), Edlund
patent: 4010704 (1977-03-01), Mayo
Heerema Pieter S.
Horowitz Alexandre
Willemsen Henricus P.
Blix Trygve M.
Keen D. W.
Varitrac AG
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