FLOATING CRANE Russian patent published in 2010 - IPC B66C23/52 B63C7/08 

FIELD: transportation.

SUBSTANCE: invention is intended for using during lifting sunken wrecks and other loads from beds of water bodies and for transportation of these loads in suspended state to destination point. Floating crane contains hoisting mechanisms with lifting arms, winches and grab hooks. There are two pontoons and hydraulic station with hydraulic cylinders for crane state changing and control system of hydraulic cylinders. Pontoons are pivotally interconnected by arms of hoisting mechanisms. Control system allows changing relative position of pontoons to provide transport or operating state of the crane. In transport state pontoons are at minimal distance from each other and rigidly interconnected. In operating state pontoons are moved apart by hydraulic cylinders and held by couplings and hydraulic cylinders in position corresponding to mutually perpendicular orientation of components of hoisting mechanisms arms. Suggested crane design provides simplified transition from transport state in operating state and vice versa.

EFFECT: increase in effectiveness of floating crane utilisation with reducing energy consumption for its transportation to the place of sunken wreck lifting and back and providing possibility to store the crane in wet docks when occupied space is limited.

3 cl, 3 dwg