A method for loading equipment and/or personnel onto a platform mounted on the nacelle tower of an offshore wind farm is provided. This method enables loading of equipment onto a platform mounted on the nacelle tower or on the monopile or tripod or jacket foundation of an offshore wind turbine without needing to mount the construction during the loading operation.

This crane is provided with: a telescopic boom that can be extended; an extension device for extending the telescopic boom; a hydraulic pressure source provided in the extension device; a cylinder connection mechanism connected to the hydraulic pressure source and switching between the states of connection and non-connection with the telescopic boom on the basis of the supply and discharge of hydraulic oil; a first oil path for connecting the hydraulic pressure source and the cylinder connection mechanism; a first valve that is provided on the first oil path and switches the supply and discharge state of the hydraulic oil with respect to the cylinder connection mechanism; and a second oil path that bypasses the first valve and connects the hydraulic pressure source and the cylinder connection mechanism.

A lift device includes a base, a turntable coupled to the base, a boom pivotably coupled to the turntable, and an actuator assembly. The actuator assembly includes a first actuator, a first coupler positioned at a first end of the first actuator, a second actuator, a second coupler positioned at a third end of the second actuator, and a third coupler. The first coupler and the second coupler pivotably couple the first actuator and the second actuator, respectively, to one of the boom or the turntable. The third coupler includes a body and a plurality of arms extending from the body. The body defines (i) a first interface that engages with an opposing second end of the first actuator and (ii) a second interface that engages with an opposing fourth end of the second actuator. The plurality of arms are pivotably coupled to the other one of the boom or the turntable.

A crane for lifting and transporting loads includes a base frame to transfer loads onto a support surface by a plurality of contacts in contact with the surface. An arm for lifting loads is rotatable relative to the base frame around a vertical axis. The angular range of the arm around the vertical axis includes angular fields, and load sensors. Each load sensor is associated with a respective contact to detect the force on the support surface. A control system obtains, from the load sensors, the value of the force, and detects the angular field where the arm is located. The control system determines a danger condition based on the values detected by the load sensors, according to different criteria in at least two different angular fields. The control system carries out predetermined functions of the crane, if the danger condition is reached.

A hydraulic actuator for a mobile crane, in particular for a locking device of a telescoping device. The hydraulic actuator has a double chamber cylinder with a first cylinder chamber and a second cylinder chamber oriented in an opposite direction to the first cylinder chamber, a first piston rod for the first cylinder chamber, and a second piston rod for the second cylinder chamber. A first restoring spring restores the first piston rod to its main position and a second restoring spring restores the second piston rod to its main position. The main position of the first piston rod is its pushed-in position and the main position of the second piston rod is its extended position.

A device includes a bevel pinion meshed to a bevel ring in rigid fixation with a pinion gear engaged with a slew ring to control rotation of the slew ring. A rotation sensor provides an electrical output corresponding to a rotational position of an input gear of the rotation sensor. A reduction gearing system interposes the bevel ring and the input gear of the rotation sensor. The gearing reduction system provides a reduction ratio enabling the rotation sensor to determine rotational position of the slew ring.

A computer-controlled mobile crane is disclosed herein, comprising a column which is rotatable around its vertical axis, a hydraulically actuated primary arm, a hydraulically actuated secondary arm, an attachment point to which a gripping assembly is attached. The components are actuated by a hydraulic control unit controlled by a computer control unit and corresponding software that generates an internal coordinate system on the basis sensors mounted on the crane and an optical measuring unit. The crane is capable of automatically using the gripping assembly to transport a load from an initial point to and end point where the load should be deposited while avoiding one or more obstacles in the path of travel of the gripping assembly and the load.

The present invention refers to loading crane comprising: an articulated arm, comprising at least one first and one second bodies successively connected in order to form an open kinematic chain, wherein the second body is translatingly and/or rotatably movable with respect to the first body; a hydraulic circuit adapted to convey a working fluid for actuating the articulated arm. Said hydraulic circuit comprises a segment associated to one of the first and second bodies comprising: at least one sliding rigid tube slidingly translatingly connected to the body to which the segment of the hydraulic circuit is associated; at least one stationary tube integrally connected to the body to which the segment of the hydraulic circuit is associated; a flexible tube fluidically interconnecting the sliding rigid tube and the stationary tube.

A mobile-type maintenance square-shaped bin including a bin body, a travelling mechanism provided under the bin body, a car head connected with one end of the bin body, an inlet and an outlet provided at the other end of the bin body, a sealed door provided on the inlet and the outlet, an allocation and transportation device mutually connected with a microcomputer signal provided at a front end of the bin body as well as provided over an internal portion of the bind body, an maintenance platform provided at a bottom of the internal portion of the bin body, a tool platform provided adjacently to the maintenance platform, an ash-removal mechanism provided at an upper portion of the maintenance platform, an air-conditioning device provided at an outer portion of the bin body, and a scanning mechanism provided at a front portion of the maintenance platform.

A mobile-type maintenance square-shaped bin including a bin body, a travelling mechanism provided under the bin body, a car head connected with one end of the bin body, an inlet and an outlet provided at the other end of the bin body, a sealed door provided on the inlet and the outlet, an allocation and transportation device mutually connected with a microcomputer signal provided at a front end of the bin body as well as provided over an internal portion of the bind body, an maintenance platform provided at a bottom of the internal portion of the bin body, a tool platform provided adjacently to the maintenance platform, an ash-removal mechanism provided at an upper portion of the maintenance platform, an air-conditioning device provided at an outer portion of the bin body, and a scanning mechanism provided at a front portion of the maintenance platform.