Accession Number : ADD012116
Title : Linked-Spar Motion-Compensated Lifting System.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Olsen,Ralph A ; Cuthbertson,Robert H
Report Date : 24 Sep 1985
Pagination or Media Count : 10
Abstract : This patent is for an inproved system for operating a lifting cable over the side of a ship at sea 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 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.
Descriptors : *PATENTS, *HOISTS, FLOATING BODIES, SPAR BUOYS, CARGO HANDLING, WINCHES, CONNECTORS, SHIPBOARD, MOTION, COMPENSATION
Subject Categories : Construction Equipment, Materials & Supplies
Distribution Statement : APPROVED FOR PUBLIC RELEASE