Recoverable trimaran

Ships – Displacement-type hull – Multiple hulls

Patent

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Details

114123, B63B 100

Patent

active

056426828

ABSTRACT:
The present invention features a trimaran-styled vessel that can recover from capsizing. The recoverable trimaran is made up of a specifically configured main hull with retractable, asymmetrical amas; internal, water-ballast tanks; a raised, buoyant, stern deck; and a specifically located main hatch. These components are sized according to the requirements of the prospective owner, yet within the confines of conventional, naval-engineering practices. The main hull has dead-end sockets in which the beams supporting the amas are attached and can be retracted. The main hull also includes longitudinal hollows in the lower portion of each side to allow the nesting of the amas in close proximity to the main hull. Retracting the beams places the amas adjacent the main hull, within the hollows. With the amas retracted, the cross-section of the main hull and amas resembles a circle. This configuration, combined with separately compartmentalized water-ballast tanks located below the beam sockets, and a ballast tank/skeg, produces a low center of gravity (CG). These ballast tanks usually remain empty, but, in the event of capsizing, they are filled by using a set of pumps, in combination with a series of diverter valves, to produce the low CG required to provide a righting force.

REFERENCES:
patent: 942687 (1909-12-01), White
patent: 4655154 (1987-04-01), Leonard
patent: 4730570 (1988-03-01), Harris
patent: 4802433 (1989-02-01), Kovac
patent: 4836120 (1989-06-01), Murphy
patent: 5277142 (1994-01-01), Conner

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