A method of erecting a wind power installation which has an aerodynamic rotor having rotor blade connections. A lifting beam having a ballast unit is fixed to a crane hook of a crane. A rotor blade is fixed to a second crane hook at an underside of the ballast unit by means of lifting cables. The lifting beam and the rotor blade are lifted by the crane for mounting the rotor blade at one of the rotor blade connections.

A method of erecting a wind power installation which has an aerodynamic rotor having rotor blade connections. A lifting beam having a ballast unit is fixed to a crane hook of a crane. A rotor blade is fixed to a second crane hook at an underside of the ballast unit by means of lifting cables. The lifting beam and the rotor blade are lifted by the crane for mounting the rotor blade at one of the rotor blade connections.

Disclosed is a base assembly for supporting a crane pedestal. The base assembly comprises four base units, each having a first end and a second end, and each base unit being of an L-shape with an outside beveled corner. Fastening devices connect each base unit at their first and second end to respective first and second ends of another of the four base units. The four base units are dimensioned so that, when connected by said fastening devices, they form an octagonal-shaped base structure. The four base units are also dimensioned to support four pads that each rest on a face of each unit adjacent to its beveled corner when the four base units are assembled in the octagonal-shaped base structure. Also disclosed is a method for assembling a base assembly for supporting a crane pedestal and a fastening device for connecting the ends of two units together.

Disclosed is a base assembly for supporting a crane pedestal. The base assembly comprises four base units, each having a first end and a second end, and each base unit being of an L-shape with an outside beveled corner. Fastening devices connect each base unit at their first and second end to respective first and second ends of another of the four base units. The four base units are dimensioned so that, when connected by said fastening devices, they form an octagonal-shaped base structure. The four base units are also dimensioned to support four pads that each rest on a face of each unit adjacent to its beveled corner when the four base units are assembled in the octagonal-shaped base structure. Also disclosed is a method for assembling a base assembly for supporting a crane pedestal and a fastening device for connecting the ends of two units together.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

Disclosed is a mobile articulated crane having a boom for carrying a load when the crane is stationary and while the crane is mobile. The boom has an end for engaging with a load and an opposed end. The crane further comprises a counterweight attached to the boom at or close to the opposed end of the boom. A rear body of the crane can comprise first and second rear axles, each for supporting the rear body on the ground. The first rear axle can be arranged to be displaced relative to the second rear axle such that wheels of the first rear axle selectively engage or disengage with the ground.

The present invention relates to a tower crane, in particular a revolving tower crane, comprising a crane tower composed of a plurality of tower pieces, a main boom arranged at the tower tip, and a counter-boom, wherein at least one main hoist rope is guided over the main boom to take up the load and at least one counter-boom hoist rope is guided over the counter-boom to take up balance weight.

A system and associated method for detecting an entity in a detection area surrounding a drilling machine is provided. The detection area is being divided into a plurality of subzones, with each of said plurality of subzones being associated with a corresponding safety level. The system comprises at least one optical scanner optically covering the detection area and operable to capture the entity within the detection area; a controlling device, operatively connected with the at least one optical scanner, the controlling device is configured to: determine a position of the entity captured by the at least one optical scanner within at least one of the plurality of subzones of the detection area; and trigger at least one action signal based on the safety level of the subzone corresponding to the determined position of the entity.

A knuckle boom crane includes a base with a top surface and a bottom surface, a slewing platform fixedly coupled to the top surface, a slew column rotatably coupled to the slewing platform, a counterweight coupled to the slew column and configured to pivot with the slew column, an intermediate boom pivotably coupled to the slew column, and a telescoping outer boom pivotably coupled to the intermediate boom. The knuckle boom crane further includes a plurality of outriggers pivotably coupled to the top surface between a stored position and a supporting position, a robotic driving unit rotatably coupled to the bottom surface and configured to drive the knuckle boom crane, and a plurality of base lifts coupled to the bottom surface and adjustable between a retracted and an extended position.

A knuckle boom crane includes a base with a top surface and a bottom surface, a slewing platform fixedly coupled to the top surface, a slew column rotatably coupled to the slewing platform, a counterweight coupled to the slew column and configured to pivot with the slew column, an intermediate boom pivotably coupled to the slew column, and a telescoping outer boom pivotably coupled to the intermediate boom. The knuckle boom crane further includes a plurality of outriggers pivotably coupled to the top surface between a stored position and a supporting position, a robotic driving unit rotatably coupled to the bottom surface and configured to drive the knuckle boom crane, and a plurality of base lifts coupled to the bottom surface and adjustable between a retracted and an extended position.