A crane, in particular a mobile crane, having a closed hydraulic circuit in which a hydraulic pump is hydraulically connected to at least one hydraulic motor via a feed and a discharge, and in which the feed is hydraulically connected to the discharge via at least one bypass which bypasses the at least one hydraulic motor, wherein the at least one bypass includes a continuously adjustable valve for variably controlling the fluid flow bypassing the at least one hydraulic motor. In addition, a corresponding control device and a corresponding crane control program for actuating a closed hydraulic circuit of a crane are provided.

The present disclosure provides supporting leg for a mobile land transporting machine such as a truck crane that is connectable with each beam on the chassis of the mobile transporting machine and telescopically extendable by means of a hydraulic media in a hydraulic circuit that extends from the beam towards the supporting leg. The supporting leg is, despite to the presence of the hydraulic circuit, pivotable at any angle around each axis on the beam. As such, the presence of any loose hydraulic conduits or other components of the hydraulic circuit that could protrude into the supporting leg and/or the beam is eliminated. To this aim, the supporting leg includes a ring-shaped hydraulic interface with flat front surfaces and an uninterrupted external circumferential surface and located adjacent to a bearing casing of the supporting leg and pivotally located on a hinge of each telescopic arm of the beam.

A power supply panel according to the present disclosure is buried in a buried space having a groove structure or a hole structure, formed in a wall of a fabrication facility (FAB), such that a front portion is disposed on an exposed surface of the buried space, and includes a power supply body supplying power; and a heat dissipation portion formed in the front portion of the power supply body.

A power supply panel according to the present disclosure is buried in a buried space having a groove structure or a hole structure, formed in a wall of a fabrication facility (FAB), such that a front portion is disposed on an exposed surface of the buried space, and includes a power supply body supplying power; and a heat dissipation portion formed in the front portion of the power supply body.

The present disclosure provides a lifting device comprising: a telescopic boom, comprising a basic section, at least one primary telescopic section and at least one secondary telescopic section; a telescopic control mechanism, comprising a primary telescopic drive mechanism that controls synchronous telescoping of the at least one primary telescopic section and a secondary telescopic drive mechanism that controls synchronous telescoping of the at least one secondary telescopic section; a torque limiter, comprising a first length sensor and a second length sensor, wherein a first sensor body and a telescopic end of a first length measuring cable of the first length sensor are respectively connected to tails of adjacent two section in the basic section and the at least one primary telescopic section; and a second sensor body and a telescopic end of a second length measuring cable of the second length sensor are respectively connected to tails of adjacent two section in the primary telescopic section adjacent to the at least one secondary telescopic section and the at least one secondary telescopic section. The lifting device of the present disclosure can reduce the length of the length measuring cable of a length sensor and thus reduce its volume and weight.

An improved vacuum material handler having an onboard drive engine powering a vacuum pump and a hydraulic pump. The vacuum material handler also having a frame with integrated forklift lugs.

An improved vacuum material handler having an onboard drive engine powering a vacuum pump and a hydraulic pump. The vacuum material handler also having a frame with integrated forklift lugs.

A feed device for supplying electrical power and/or data to an electrical load, which is movable in at least one travel direction relative to the feed device, via cables. An electrical line cable carried along by the electrical load can be connected or is connected to the feed device, and to a power supply system for supplying the movable electrical load. The line cable can be output or retrieved from a reservoir, which is carried along by the load, in accordance with a distance between the reservoir and the feed device. The feed device has at least one connection part, which is rotatable about at least one pivot axis, for the line cable. This feed device, as well as a power supply system having such a feed device, provides protective guidance and storage of the line cable, reducing the risk of kinking or excessive bending of the line cable when moving the electrical load.

The disclosure relates to a work machine, in particular a duty-cycle crawler crane, having an undercarriage which comprises a middle part and at least one crawler carrier which is connected to the middle part and comprises at least one electric traction drive, wherein at least one supply line runs from the middle part to the traction drive and is connected to the latter in a disconnectable manner via a first connection. According to the disclosure, the work machine comprises an electrical interlock loop, which is connected to the traction drive via the first connection, and a mating plug connector module, which is arranged on the undercarriage and has a first mating connection for connecting to the first connection of the supply line and is configured to bridge the interlock loop, which is interrupted by a disconnection from the traction drive, in a current-conducting manner.

The disclosure relates to a work machine, in particular a duty-cycle crawler crane, having an undercarriage which comprises a middle part and at least one crawler carrier connected to the middle part and having at least one electric traction drive, wherein at least one energy transmission line for supplying power to the traction drive and at least one further supply line runs between the traction drive and the middle part. According to the disclosure, the at least one energy supply line and the at least one further supply line run together in a separate protection means outside the middle part and the crawler carrier.