Abstract: The upper block assembly of a crane is connected to the crane boom via a special universal joint having a pivot axis and a hollow shaft. The cable by which the lower block assembly is suspended is fed through the hollow shaft and extends to the crane winch via a pulley mounted on the boom. Guide pulleys are arranged on the upper block assembly and universal joint respectively so that the cable extending therebetween is coincident with the pivot axis of the hollow shaft. With this arrangement, the lower pulley block has unlimited freedom to swing laterally (side lead angle).

Abstract: Gangway assembly with a movable bridge part resting on a first surface, extending to a second surface, and connected between the two ends by at least one wire cable gripping the top end of a gantry carried by the first surface, the support of the first end being achieved via a carriage which can be moved over the first surface, the cable being guided over a first fixed pulley on the gantry and a second fixed pulley on the first surface, and with its other end being connected to the first end of the bridge.

Abstract: A device for handling an object such as a pipe comprising a cylindrical member, with four disposed adjacent one another elongate grooves or recesses in the peripheral direction in the surface thereof and extending in upward direction, with the first and last open at the bottom, and merging into one another at the top and bottom ends via trapezoidal grooves or recesses, the whole being adapted to receive and co-operate with at least one lug projecting from the surface of the pipe.