1982-02-11
1984-06-26
Blix, Trygve M.
Ships
Ice breakers
114 67A, 114361, 180128, 405217, B63B 3508
Patent
active
044559585
ABSTRACT:
A canopy system for deployment around the periphery of a vessel floating on a body of water is disclosed primarily for use in connection with drillships in Arctic waters. The disclosed canopy system includes (a) spaced apart structural frames extending outwardly from an inboard end to an outboard free end, the frames being movable between a first position in which a lower edge projects to a point adjacent to the surface of the water in which the vessel is floating, and a second position in which the lower edge projects below the surface of the water; (b) release latches for the two phase releasable securing of the inboard ends of the frames to the periphery of the vessel, including first and second phase release latches to allow frames to move from the first to the second positions, and to allow the frames to be jettisoned from the vessel, respectively; (c) an outer stressed skin supported on the outer surface of the frames; (d) an inner skin supported by the outer stressed skin; (e) a skirt depending from the outboard free end of the frames and projecting below the surface of the water in which the vessel is floating when the frames are in either their first or second positions; and (f) ducts for supplying heated air to the skirt.
REFERENCES:
patent: 4323322 (1982-04-01), O'Rourke et al.
Bercha Frank G.
Marshall Robert E.
O'Rourke J. Cam
Pilkington G. Roger
Blix Trygve M.
Dome Petroleum Limited
Shum Ivy M.
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