A crane for lifting and transporting loads includes a base frame for transferring the loads of the crane onto a support surface by a plurality of wheels. The wheels are capable of rotating relative to the base frame so as to change the camber angle of the wheels.

A lifting device (1, 14, 18, 28, 31, 36, 46, 50) has three booms (2, 19) of adjustable length, which in each case have a first end section (4, 20) and a second end section (5, 21) opposite the first end section (4, 20). While the first end sections (4, 20) of all booms (2, 19) are articulatedly connected to one another, the second end sections (5, 21) are articulatedly and rotatably mounted in respective bearings (7, 24, 29). The bearings (7, 24, 29) are thereby arranged at fixed positions relative to one another. Furthermore, in each boom (2, 19) at least the first end section (4, 20) can be rotated about the longitudinal axis of the boom (2, 19) with respect to the second end section (5, 21). In particular, the booms (2, 19) always form a tripod, which is characterized by a high stability. The lifting device (1, 14, 18, 28, 31, 36, 46, 50) is therefore suitable for lifting very heavy loads, wherein greater ranges can be achieved compared to known lifting devices. In addition, the lifting device (1, 14, 18, 28, 31, 36, 46, 50) can be pivoted further than known lifting devices.

A lifting device (1, 14, 18, 28, 31, 36, 46, 50) has three booms (2, 19) of adjustable length, which in each case have a first end section (4, 20) and a second end section (5, 21) opposite the first end section (4, 20). While the first end sections (4, 20) of all booms (2, 19) are articulatedly connected to one another, the second end sections (5, 21) are articulatedly and rotatably mounted in respective bearings (7, 24, 29). The bearings (7, 24, 29) are thereby arranged at fixed positions relative to one another. Furthermore, in each boom (2, 19) at least the first end section (4, 20) can be rotated about the longitudinal axis of the boom (2, 19) with respect to the second end section (5, 21). In particular, the booms (2, 19) always form a tripod, which is characterized by a high stability. The lifting device (1, 14, 18, 28, 31, 36, 46, 50) is therefore suitable for lifting very heavy loads, wherein greater ranges can be achieved compared to known lifting devices. In addition, the lifting device (1, 14, 18, 28, 31, 36, 46, 50) can be pivoted further than known lifting devices.

A crane vehicle includes: an operation unit; a winch device configured to operate at a speed corresponding to an operation amount of the operation unit; a weight detection unit; a storage unit configured to store a time-weight target characteristic indicating a target in temporal change of a detected value at the weight detection unit for a maximum operation amount input from the operation unit; and a control unit configured to perform feedback control of an operation speed of the winch device such that the detected value follows the time-weight target characteristic in a case where the maximum operation amount is input from the operation unit, the control unit being configured to set the operation speed of the winch device at the speed corresponding to the operation amount of the operation unit, in a case where fluctuation of the detected value has converged in a predetermined range.

A crane vehicle includes: an operation unit; a winch device configured to operate at a speed corresponding to an operation amount of the operation unit; a weight detection unit; a storage unit configured to store a time-weight target characteristic indicating a target in temporal change of a detected value at the weight detection unit for a maximum operation amount input from the operation unit; and a control unit configured to perform feedback control of an operation speed of the winch device such that the detected value follows the time-weight target characteristic in a case where the maximum operation amount is input from the operation unit, the control unit being configured to set the operation speed of the winch device at the speed corresponding to the operation amount of the operation unit, in a case where fluctuation of the detected value has converged in a predetermined range.

A trailer adapted to haul one or more reels for carrying conveyor belts is disclosed. The trailer includes a loading means to lift the reel on the deck of the trailer. The loading means includes two articulated arms located each side of the trailer, each articulated arm comprising a first elongate member and a second elongate member pivotally mounted to the first elongate member. The first elongate members are movable relative to the trailer between a retracted position and a rearwardly extended position. The second elongate members are pivotable between a horizontal position and an upright position wherein the second elongate members are orthogonal to the first elongate members. A hoist is disposed between the second elongate members and is operable to lift the reel from the support surface to an effective height greater than an effective height of the deck. Jacks are also provided to stabilise the loading means.

A trailer adapted to haul one or more reels for carrying conveyor belts is disclosed. The trailer includes a loading means to lift the reel on the deck of the trailer. The loading means includes two articulated arms located each side of the trailer, each articulated arm comprising a first elongate member and a second elongate member pivotally mounted to the first elongate member. The first elongate members are movable relative to the trailer between a retracted position and a rearwardly extended position. The second elongate members are pivotable between a horizontal position and an upright position wherein the second elongate members are orthogonal to the first elongate members. A hoist is disposed between the second elongate members and is operable to lift the reel from the support surface to an effective height greater than an effective height of the deck. Jacks are also provided to stabilise the loading means.

A crawler type crane having a base carrier unit having a control unit associated therewith and an upper portion assembly having a boom portion coupled at end to the base carrier unit and to a jib portion at an opposed end. The boom portion includes one or more selected boom sections that are articulatable relative to each other. The crane also includes a multi-function attachment unit that is coupled to the jib portion and has a grappling unit for grasping a work piece and a saw attachment unit for cutting the workpiece. The crane can also include a first fluid regulating device coupled to the jib portion for regulating a fluid to the jib portion and to the multi-function attachment unit and a second fluid regulating device coupled to the boom portion for regulating a fluid to the winch element and to the multi-function attachment unit.

A crawler type crane having a base carrier unit having a control unit associated therewith and an upper portion assembly having a boom portion coupled at end to the base carrier unit and to a jib portion at an opposed end. The boom portion includes one or more selected boom sections that are articulatable relative to each other. The crane also includes a multi-function attachment unit that is coupled to the jib portion and has a grappling unit for grasping a work piece and a saw attachment unit for cutting the workpiece. The crane can also include a first fluid regulating device coupled to the jib portion for regulating a fluid to the jib portion and to the multi-function attachment unit and a second fluid regulating device coupled to the boom portion for regulating a fluid to the winch element and to the multi-function attachment unit.

The present disclosure relates to a mobile crane that comprises an undercarriage having a chassis and comprises a superstructure that is rotatable about a vertical axis relative to the undercarriage and has a telescopic boom at whose tip a boom head is arranged. The boom has holding means at one side for the support of a folding boom that can be releasably installed at the boom head. The boom laterally has a console and a holding element arranged between the console and the boom head. The folding boom is pivotable about a vertical axis of the holding element for the installation at the boom head, while it is supported on the console. In accordance with the present disclosure, a first securing device is arranged in the region of the console by means of which a movement of the folding boom deviating from a pivot movement about a vertical axis can be limited. The present disclosure furthermore relates to a folding boom for a crane.