Abstract: A method for monitoring a stability parameter of a loading crane mounted on a vehicle supported on the ground by wheels and by support elements separate from the wheels includes calculating, using a processor, the stability parameter of the loading crane mounted on the vehicle supported on the ground by the wheels and the support elements, and comparing the magnitude of the stability parameter to at least one predetermined limit value. The calculating includes detecting contributions to a magnitude of the stability parameter of the wheels of the vehicle on which the loading crane is mounted and detecting contributions to the magnitude of the stability parameter of the support elements of the vehicle on which the loading crane is mounted.

Abstract: A crane includes a crane pillar rotatably mounted about a vertical axis, at least one jib, connected to the crane pillar and pivotally mounted about a horizontal axis, at least one jib extension movably mounted in the jib, and at least one piston-cylinder unit for extending and retracting the jib extension relative to the jib. The first end of the piston-cylinder unit engages the jib via at least one first force-introducing region, and the second end engages the at least one jib extension via at least one second force-introducing region. The piston-cylinder unit has a central plane parallel to the horizontal axis about which the jib is pivotally mounted, and the piston-cylinder unit has a compressive deformation perpendicular to the central plane in a pressure-loaded state while the jib is being extended and a tensile deformation opposite the compressive deformation in a tension-loaded state while the jib is being retracted.

Abstract: The invention relates to a method for monitoring at least one stability parameter of a loading crane mounted on a vehicle, wherein during crane operation the vehicle is supported on the ground by means of wheels and by means of supporting elements separate from the wheels, wherein both contributions of the wheels and contributions of the supporting elements are measured to a magnitude of the stability parameter and said magnitude is compared with at least one predetermined limit value.

Abstract: A hydraulically actuatable jib for a loading crane includes at least two jib extensions, the first jib extension being designed as an outer jib extension and the second jib extension being designed as an inner jib extension. At least two feed cylinders extend and react the at least two jib extensions. A hydraulic circuit for a working fluid includes a retraction line for retracting the feed cylinders in a pressurized manner, and the retraction line opens into the feed cylinder of the outer jib extension. A tank is provided for releasing the working fluid, and a control valve can be switched into an open position when the outer jib extension reaches a defined retraction position, particularly when the outer jib extension is substantially fully retracted. The valve thereby supplies the feed cylinder of the inner jib extension with pressurized working fluid.

Abstract: A mobile crane has at least two crane booms which are connected together by a joint such that the angular position with respect to each other can be adjusted. At least one hose between the crane booms, and the hose is exposed in the region of the joint in at least one angular position of the crane booms. At least one flexurally elastic sheet is connected with the at least one hose or covers it at least in the exposed region and can flex when the angular position of the at least two crane booms is changed. The at least one flexurally elastic sheet can be moved into or respectively out of one of the crane booms upon a change in the angular position of the crane booms.

Abstract: A vehicle crane—in particular an articulated-arm crane—includes a lifting arm and one or more articulated arms, and the geometry of the crane arms can be changed with respect to one another. A load cable can be guided or is guided on the crane arms. A compensation device allows the tension in the load cable to be controlled or regulated upon a change in the geometry of the crane arms with respect to one another.

Abstract: An arrangement includes a winch that is preferably used for hoisting loads as well as an adjusting mechanism for the winch. In the assembled state, the winch is mounted on a crane boom so as to be movable by a limited degree between an operating position and a transported position by means of the adjusting mechanism. The adjusting mechanism is equipped with at least one linear drive unit which cooperates with a lever gear to adjust the winch.

Abstract: The invention relates to a crane jib for a crane, having a longitudinal axis and an imaginary contour line that extends in a transversal plane relative to an axis of symmetry in an at least approximately mirror-symmetric manner. The contour line has an at least approximately arcuate section between a center that is equally interspaced from the first and second point of intersection on the axis of symmetry and the first point of intersection, and a first straight section is tangentially contiguous thereto in the direction of the second point of intersection. The imaginary extension of the first straight section in the direction of the second point of intersection intersects the axis of symmetry and forms an acute angle therewith.

Abstract: A transport securing arrangement for a side extension arm of a vehicle includes a locking device and a securing hook, wherein the locking device is arranged in relation to the securing hook in such a way that release of the locking device leads to the release of the securing hook from its anchorage.

Abstract: A crane has at least one telescopic crane arm with at least two sliding arms that are moveable against each other. At least one gliding element, which is housed in a frame in a detached and unfastened manner, is arranged between the sliding arms. The gliding element has a separate spring element projecting from the gliding surface of the gliding element.

Abstract: An apparatus for loading and unloading a container on to and off of a vehicle, wherein the container has two symmetrically arranged rollers and a centrally arranged hook. The apparatus includes an angular arm at an end of which is arranged a coupling device which is provided with a pair of hooks for engaging behind the rollers and which can be engaged into the hook.