A remote operation device capable of providing, to the operator, guidance of a work content to be performed by manual work or remote operation on the work machine in accordance with a state of the work machine, is a remote operation device (40) configured to be capable of communicating with the work machine, and includes: an operation unit (42) that generates an operation signal for performing remote operation of the work machine in accordance with operator's operation; a reception unit (40a) that receives detection signals of detection devices (81 to 84) that detect the state of the work machine; and a display unit (43) that displays a screen indicating a work content to be performed by manual work or the remote operation on the work machine on the basis of the received state of the work machine.

A remote operation device capable of providing, to the operator, guidance of a work content to be performed by manual work or remote operation on the work machine in accordance with a state of the work machine, is a remote operation device (40) configured to be capable of communicating with the work machine, and includes: an operation unit (42) that generates an operation signal for performing remote operation of the work machine in accordance with operator's operation; a reception unit (40a) that receives detection signals of detection devices (81 to 84) that detect the state of the work machine; and a display unit (43) that displays a screen indicating a work content to be performed by manual work or the remote operation on the work machine on the basis of the received state of the work machine.

An apparatus for providing a user with a lifting capacity of a lifting machine includes a graphical display displaying a spectrum of lifting capacity across a continuous range of boom height and boom radii. Related methods are disclosed.

A boom assembly includes a first boom, a second boom pivotally coupled to the first boom, and an actuator assembly having (i) a first end coupled to at least one of the first boom or the second boom and (ii) an opposing second end coupled to the second boom. The actuator assembly includes a first actuator, a second actuator flexibly joined to the first actuator at the opposing second end of the actuator assembly, and a rigid coupler positioned to fixedly couple the first actuator and the second actuator together at the first end of the actuator assembly. The rigid coupler is configured to pivotally couple the first end of the actuator assembly to the at least one of the first boom or the second boom. The first actuator and the second actuator are configured to move relative to one another in response to various loading conditions.

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 slewing apparatus includes a control section that performs at least a slewing angular velocity pattern determination process. In the slewing angular velocity pattern determination process, the slewing angular velocity pattern is determined such that in a first interval and a second interval of a control time T that is shorter than a cycle determined by a pendulum length of a suspended load that is in a pendulum motion, a difference between a maximum angular velocity and a minimum angular velocity increases as the control time T decreases.

A slewing apparatus includes a control section that performs at least a slewing angular velocity pattern determination process. In the slewing angular velocity pattern determination process, the slewing angular velocity pattern is determined such that in a first interval and a second interval of a control time T that is shorter than a cycle determined by a pendulum length of a suspended load that is in a pendulum motion, a difference between a maximum angular velocity and a minimum angular velocity increases as the control time T decreases.

A device for supporting a cable of a capstan of a crane includes a main supporting structure; a pulley rotatably supported by the main supporting structure, adapted to guide the cable of the capstan; and a sensor for measuring the angular position of the pulley. The pulley includes an auxiliary crown having a plurality of projecting elements disposed along the circumference thereof, and the sensor includes a stationary body integral with the main supporting structure and a wheel rotatable with respect to the stationary body, including a deformable crown meshing with the auxiliary crown of the pulley and made of a material such to deform due to the engagement of the projecting elements, wherein the sensor further includes means for detecting the angular position of the wheel with respect to the stationary body of the sensor.

In a method for determining a load that is lifted or to be lifted by a hydraulic lifting device, for the determining the load lifted or to be lifted, in a reference phase, the lifting device is moved into a reference position in a first loading state of the lifting device. A first detection of the forces currently acting on the lifting device and the current geometry of the lifting device occurs in the reference position. In a measurement phase, the lifting device is moved into a measurement position in a second loading state, and a second detection of the forces currently acting on the lifting device and the current geometry of the lifting device occurs in the measurement position. In a comparison phase, the lifted load is characterized by a comparison of the respective detected forces currently acting on the lifting device and the respective detected current geometry of the lifting device.

A crane for mounting to a vehicle, comprising a base defining a plane, a column member pivotally connected with respect to the base at a first end, and a column lifting arrangement, configured to adjust an angle of the column member with respect to the plane, wherein the column member is configured to be moved between a retracted position, where the column member lies substantially parallel with the plane defined by the base, through to a fully extended position, where the angle between the column member and the plane defined by the base is greater than 90 degrees.