The invention relates to a crane, in particular a rotary tower crane, comprising a crane boom, from which a load hook can be raised and lowered via a hoist cable, and an electric power supply on the load hook and/or an optionally provided trolley which can be moved on the crane boom. According to the invention, the electric power is directly generated at the location where it is required, and in the process kinetic energy present at said location is converted into power. According to the invention, the electric power supply comprises a generator which is arranged on the load hook and/or on the trolley and which can be driven by a deflecting and/or running pulley and/or a cable running around the deflecting pulley.

A mining or construction vehicle comprising an extendable boom comprised of a first and a second telescopic section extending in a longitudinal direction, wherein the first telescopic section is arranged to be connected to the mining or construction vehicle and a hydraulic device is arranged to be connected to a mounting device at a free end of the second telescopic section, wherein a hydraulic cylinder is arranged in connection to the extendable boom to govern extension of said extendable boom. Hydraulic conduit for supply of hydraulic fluid to the hydraulic device on the mounting device are arranged through the length of the extendable boom.

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.

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 system for servicing a nuclear reactor module comprises a crane operable to attach to the nuclear reactor module, wherein the crane includes provisions for routing signals from one or more sensors of the nuclear reactor module to one or more sensor receivers.

The invention relates to a crane, in particular a rotary tower crane (1), comprising a crane boom (3), from which runs a hoisting cable (6) connected to the load hook (7), as well as comprising a load hook positioning device (8) for determining the load hook position, wherein the load hook positioning device (8) has at least three electromagnetic radio modules (9) exchanging radio signals with one another, of which at least one radio module is attached to the load hook and at least two further radio modules are attached to the crane structure and/or in the environment of the crane in a spaced apart manner, as well as an electronic evaluation device for evaluating the radio signals and determining the position of the load hook from the radio signals.

An energy supply system includes a cable store for winding and unwinding an energy cable about a winding center of the cable store. A carrier is provided for the at least one energy cable, and the cable store has an opening for the inlet and outlet of the carrier and the energy cable. The carrier can be guided through the opening in order to guide the carrier and the energy cable in sections in the cable store to the winding center of the cable store over a first guide path through a first guide arc, over a second guide path, which adjoins the first guide arc, through a second guide arc, and over a third guide path, which adjoins the second guide arc and lies further inwards relative to the winding center than the first guide path, and optionally over additional guide paths and guide arcs, using guiding means.

The telescopic arm for operating machines includes an outer arm, four coaxial slip-off elements, first, second, third, fourth and an operative head associated to the latter. The telescopic arm includes: a drive system, supported partially outside of the telescopic arm, for moving synchronously said slip-off members in their extending and returning travels; a hydraulic circuit, housed inside said telescopic arm, comprising a first and a second group of hydraulic conduits, which include, respectively, first and second flexible pipes, kept stretched during the returning step of said slip-off members by the corresponding idler pulleys, supported by the latter.

The telescopic arm for operating machines includes an outer arm, four coaxial slip-off elements, first, second, third, fourth and an operative head associated to the latter. The telescopic arm includes: a drive system, supported partially outside of the telescopic arm, for moving synchronously said slip-off members in their extending and returning travels; a hydraulic circuit, housed inside said telescopic arm, comprising a first and a second group of hydraulic conduits, which include, respectively, first and second flexible pipes, kept stretched during the returning step of said slip-off members by the corresponding idler pulleys, supported by the latter.

A system for servicing a nuclear reactor module comprises a crane operable to attach to the nuclear reactor module, wherein the crane includes provisions for routing signals from one or more sensors of the nuclear reactor module to one or more sensor receivers.