SHIP LIFTER Russian patent published in 2013 - IPC B66B9/02 

FIELD: transport.

SUBSTANCE: invention relates to ship equipment for freight loading and unloading, particularly, to ship lifters. Lifter comprise cargo platform and platform vertical drive.The latter comprises drive reduction gears and two vertical running screws and nuts. Every said screw-nut assy is articulated via compensating coupling with mate carriage. Said carriage is articulated with platform to displace along appropriate fixed vertical guides. In top view said platform is located between running screws, each being located between said guides of appropriate carriage. Top end of every running screw is secured by structural support at shop compartment ceiling while bottom end is articulated via toothed coupling with output shaft of appropriate drive reduction gear mounted at ship compartment floor.

EFFECT: higher reliability and efficiency.

5 cl, 10 dwg