A modular lifting system, including an enclosable lifting device support structure. The enclosable lifting device support structure includes a deployable top, a plurality of lateral sides, a base coupled to the plurality of lateral sides, and a plurality of extension arms. The deployable top is configured to support a lifting device on a first side of the deployable top. The plurality of extension arms are configured to extend and support the deployable top when the deployable top is deployed.

A modular lifting system, including an enclosable lifting device support structure. The enclosable lifting device support structure includes a deployable top, a plurality of lateral sides, a base coupled to the plurality of lateral sides, and a plurality of extension arms. The deployable top is configured to support a lifting device on a first side of the deployable top. The plurality of extension arms are configured to extend and support the deployable top when the deployable top is deployed.

A hydraulic crane comprising: a rotatable column (7); a crane boom system comprising a first crane boom (11) connected to the column; and an electronic control device for controlling the movement of the column and the crane boom system on of the basis of control signals from a manoeuvring unit and a calculation model for boom tip control. The control device is configured to switch from a first control mode into a second control mode when the first crane boom is about to interfere with an obstacle. In the first control mode, the control device controls the crane boom movements in accordance with an ordinary control strategy. In the second control mode, the control device makes the load suspension point (P) of the crane boom system move along the trajectory defined by said control signals while controlling the crane boom movements in accordance with an auxiliary control strategy in which the first crane boom is prevented from interfering with the obstacle.

A lifting element, such as for a vessel or vehicle, comprising a lifting element, such as an oblong element, rotated by a number of electrical motors via a rotatable, such as an eccentric, element. The eccentric element ensures that the lifting element can only be tilted within a predetermined angle area increasing the safety thereof. Multiple electric motors are used where one motor counteracts the other within an angle interval to ensure that the tilting element does not tilt undesirably.

A lifting element, such as for a vessel or vehicle, comprising a lifting element, such as an oblong element, rotated by a number of electrical motors via a rotatable, such as an eccentric, element. The eccentric element ensures that the lifting element can only be tilted within a predetermined angle area increasing the safety thereof. Multiple electric motors are used where one motor counteracts the other within an angle interval to ensure that the tilting element does not tilt undesirably.

A system and method for handling slag in a slag pit includes an equilibrium or balance crane equipped with a quick connect coupling. A drop-ball fixture and drop-ball reduces the size of the slag, as needed, then the boom assembly of the crane releases the drop-ball fixture and engages an excavating tool, such as a clamshell bucket, a bucket, or a grapple. An elevated control station provides an operator with improved line-of-sight visibility.

A crane characterized in that it comprises a lower vertical boom (10) and an upper horizontal boom (12), mutually connected through a joint element (20), in that the lowest part of the vertical boom is connected through a pedestal (14), the pedestal further comprising a slew ring for rotating of the crane about a vertical axis (16), and a tension rod (22) is arranged between the pedestal and the joint element in a distance from the vertical boom and mainly parallel to this in a normal position of the crane.

A modular lifting system, including an enclosable lifting device support structure. The enclosable lifting device support structure includes a deployable top, a plurality of lateral sides, a base coupled to the plurality of lateral sides, and a plurality of extension arms. The deployable top is configured to support a lifting device on a first side of the deployable top. The plurality of extension arms are configured to extend and support the deployable top when the deployable top is deployed.

A modular lifting system, including an enclosable lifting device support structure. The enclosable lifting device support structure includes a deployable top, a plurality of lateral sides, a base coupled to the plurality of lateral sides, and a plurality of extension arms. The deployable top is configured to support a lifting device on a first side of the deployable top. The plurality of extension arms are configured to extend and support the deployable top when the deployable top is deployed.

A method and a system for controlling a parallel crane on a working machine by means of TCP control. According to the method, the parallel crane has a crane arm system with crane parts with a lifting arm section with two parallel arms, a rocker arm with a telescoping push arm, which crane parts are articulately mutually connected and to the working machine and can be displaced through impact of actuators and activators, which are controlled and monitored by a control system by which direction and motion speed of the parallel crane Tool Center Point (TCP) controlled by an operator using joysticks in the working machine, by applying speeds for the various crane parts of the parallel crane. A characteristic is that the speeds of the various crane parts of the parallel crane are automatically determined by the control system based on the position of the various crane parts.