Patent ID: 6595494
Filing Date: 2003-07-22
Classification: B66C,B66D,E21B,Y10S

Abstract:
A hoisting device (1) for a vessel comprising: a mast (2) on the top side provided with fixed cable blocks; a trolley (10) including pulleys, which are moveable, and on the bottom side is provided with means (12) for gripping a load; hoisting means, at least equipped with a hoisting cable (16) and a winch (18), the hoisting cable (16) being guided over the cable blocks and pulleys of both the mast and the trolley, to move the trolley (10) relative to the mast (2) with the aid of the hoisting means; and at least two compensators in the form of pneumatic or hydraulic cylinders, for damping movements of the vessel (70) as a result of heave and beating of the waves, characterized in that the hoisting cable (16) is guided over cable pulleys (20) which are connected to the ends of the compensators, the mast is designed in the form of a tube or sleeve, and in that the compensator (21) is placed in the mast (2) and each of said compensators are connected to cable pulleys (20) at its end.