Linked-spar motion-compensated lifting system

Details Linked-spar motion-compensated lifting system Linked-spar motion-compensated lifting system

1984-10-04

1985-09-24

Sotelo, Jesus D.

Buoys, rafts, and aquatic devices

Buoy

For mooring a vessel

114230, B63B 2152

Patent

active

045430705

ABSTRACT:
An improved system for operating a lifting cable over the side of a ship at ea in which a spar buoy having an adjustable lifting capacity is coupled to the ship by a rigid linkage which is free to pivot on an axis attached to the ship deck, and operates to decouple the motion of the ship from the lifting cable. The spar buoy is attached to a gimbal sheave assembly having a disengageable connector and tension line for drawing the connector into engagement with a mating socket at the outward end of a linkage boom. A narrow upper section of the spar buoy is provided with a plurality of vertical tubes and valves which by flooding or evacuating operate to vary the effective water plane area of the buoy for continual fine tuning and optimally adjusting of its natural heave mode characteristic frequency.

REFERENCES:
patent: 2572165 (1951-10-01), Locki
patent: 4280430 (1981-07-01), Wilson et al.

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