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US 5,201,275 AGranted
Marine construction
AssigneeOffshore Concrete A/S
InventorOlav Mo
Life of this patent
Estimating the term…
Abstract
A marine construction includes a hull for vessel made of concrete. The hull has at least two circular cylinders and additional cylinders either outside the circular cylinders or as interposed cylinder members of triangular cross-section adjacent the at least two circular cylinders. The construction is usable for transport, storage, floating docks, submarines, aircraft carriers, and the like.
Claims6
A monolithic concrete marine vessel hull construction, comprising:
- an inner hull skin comprising at least two transversely interconnected, longitudinally, horizontally, coextensive inner hull shells of vertically slip-formed concrete each of which is generally cylindrically curved on inner and outer peripheral surfaces thereof;
- each said inner hull shell being closed at opposite ends thereof by a respective endwall means;
- an outer hull skin comprising an outer hull shell of vertically slip-formed concrete transversally spaced from and peripherally enclosing said inner hull skin, said outer hull skin being curved perimetrically thereof;
- a plurality of longitudinally and transverse concrete bulkheads extending between and effectively interconnecting said inner and outer hull skins;
- said outer hull shell being closed at respective opposite ends thereof by a bow member and a stern member and including a concrete deck;
- and
- means mounting said concrete deck on said inner hull shell so that said concrete deck is generally horizontally arranged to face upwards over said inner hull shell.
4 more elements
A method for manufacturing a monolithic concrete marine vessel hull construction, comprising:
- providing a vessel hull end section comprising an endwall and an initial portion of a peripheral sidewall of a shell secured at one end to said endwall portion;
- launching said end section into a body of water so that said end section is buoyed vertically therein with said end wall oriented downwards;
- and
- molding a concrete monolith onto said end section so as to incorporate said end section into said concrete monolith so that said concrete monolith, upon being rotated to a horizontal disposition includes:
- an inner hull skin comprising at least two transversely interconnected, longitudinally, horizontally, coextensive inner hull shells of vertically slip-formed concrete shells each of which is generally cylindrically curved on inner and outer peripheral surfaces thereof;
- each said inner hull shell being closed at opposite ends thereof by a respective endwall means;
- an outer hull skin comprising an outer hull shell of vertically slip-formed concrete transversely spaced from and peripherally enclosing said inner hull skin, said outer hull skin being curved perimetrically thereof;
- a plurality of longitudinal and transverse concrete bulkheads extending between and effectively interconnecting said inner and outer hull skins;
- said outer hull shell being closed at respective opposite ends thereof by a bow member and a stern member and including a concrete deck;
- means mounting said concrete deck on said inner hull shell so that said concrete deck is generally horizontally arranged to face upwards over said inner hull shell;
- where said inner and outer hull shells are produced by vertical slip forming;
- and
- said concrete monolith is rotated from a vertical to a horizontal disposition after the last-to-be-molded of said bow member and stern member is molded thereon.
10 more elements
Dependencies are inferred from the claim text.