A lift truck comprises a chassis (1) movable on wheels (2) and a rotating platform (3) which supports an operating arm (4); stabilizing means are provided for resting on the ground and positioned at the front as well as at the back. The stabilizing means consist of two pairs of two telescopically extensible arms (5), each one comprising a first segment (6) and a second segment (7). The arms (5) have their ends hinged to opposite sides of the chassis (1), so as to swivel about parallel axes, and have the opposite free ends intended to lean against the ground by means of plates or stabilizing feet (8). The two arms (5) of each pair are arranged side by side at a short distance from each other on parallel planes and are individually bound to the chassis (1) by means of hydraulic cylinders (11). Control means are provided to control at least the return movements of each pair of arms (5) to a folded, contracted configuration, according to a predetermined sequence which provides that, for each single arm (5), full retraction of a respective second segment (7), at least for a predetermined portion of the final part of its return stroke, is carried out only after that the first segment (6) of the other arm (5), belonging to the same said pair of arms (5), has reached a final folding position.

A lift truck comprises a chassis (1) movable on wheels (2) and a rotating platform (3) which supports an operating arm (4); stabilizing means are provided for resting on the ground and positioned at the front as well as at the back. The stabilizing means consist of two pairs of two telescopically extensible arms (5), each one comprising a first segment (6) and a second segment (7). The arms (5) have their ends hinged to opposite sides of the chassis (1), so as to swivel about parallel axes, and have the opposite free ends intended to lean against the ground by means of plates or stabilizing feet (8). The two arms (5) of each pair are arranged side by side at a short distance from each other on parallel planes and are individually bound to the chassis (1) by means of hydraulic cylinders (11). Control means are provided to control at least the return movements of each pair of arms (5) to a folded, contracted configuration, according to a predetermined sequence which provides that, for each single arm (5), full retraction of a respective second segment (7), at least for a predetermined portion of the final part of its return stroke, is carried out only after that the first segment (6) of the other arm (5), belonging to the same said pair of arms (5), has reached a final folding position.

A utility vehicle, in particular a firefighting vehicle, comprising an extendable aerial apparatus like a turnable ladder and/or an aerial rescue platform, a jacking system with lateral ground supports for jacking the vehicle body, and a stabilization mechanism for preventing tilting of the vehicle body in its jacked state. The stabilization mechanism includes a hydraulically operable rear axle blocking device for blocking the rear axle suspension of the vehicle. The stabilization mechanism further includes at least one hydraulically lockable shock absorber integrated into the front axle suspension of the vehicle. The rear axle blocking device and the hydraulically lockable shock absorber are controlled by a common hydraulic control to lock the hydraulically lockable shock absorber at the same time or with a delay after activating the rear axle blocking device.

A utility vehicle, in particular a firefighting vehicle, comprising an extendable aerial apparatus like a turnable ladder and/or an aerial rescue platform, a jacking system with lateral ground supports for jacking the vehicle body, and a stabilization mechanism for preventing tilting of the vehicle body in its jacked state. The stabilization mechanism includes a hydraulically operable rear axle blocking device for blocking the rear axle suspension of the vehicle. The stabilization mechanism further includes at least one hydraulically lockable shock absorber integrated into the front axle suspension of the vehicle. The rear axle blocking device and the hydraulically lockable shock absorber are controlled by a common hydraulic control to lock the hydraulically lockable shock absorber at the same time or with a delay after activating the rear axle blocking device.

The invention relates to a crane having an undercarriage with a swivel connection and having a superstructure rotatably supported thereon via the swivel connection and comprising at least one boom system arranged at said superstructure and luffable about a luffing axis or a self-climbing tower slewing crane rotatably supported thereon via the swivel connection. In accordance with the invention, the undercarriage has a pot as a central component which, on the one hand, receives the swivel connection. Furthermore, however, the pivotable supports can also be pivotally connected to it. Side members are present at mutually oppositely disposed sides and at least one traveling gear can respectively connected to them with at least one degree of freedom.

The invention relates to a crane having an undercarriage with a swivel connection and having a superstructure rotatably supported thereon via the swivel connection and comprising at least one boom system arranged at said superstructure and luffable about a luffing axis or a self-climbing tower slewing crane rotatably supported thereon via the swivel connection. In accordance with the invention, the undercarriage has a pot as a central component which, on the one hand, receives the swivel connection. Furthermore, however, the pivotable supports can also be pivotally connected to it. Side members are present at mutually oppositely disposed sides and at least one traveling gear can respectively connected to them with at least one degree of freedom.

A container trailer crane has an apparatus that includes a base, a crane arm, an outrigger, and a mechanical ram that is used in both positioning the outrigger and the crane arm.

The invention relates to a method for detecting and verifying a working position of a mobile concrete pump, said method comprising the steps: a) setting up and at least partially supporting the concrete pump at a set-up position; b) detecting position-related data of a working position, wherein the working position is located in a region of a surface to be concreted which is remote from the set-up position; c) comparing the position-related data with a theoretical working area resulting from the set support; and d) outputting a signal as to whether the working position can be operated. This makes it possible to set up or support a mobile concrete pump in the most optimal manner possible. The invention also relates to a method for determining a suitable support setting, a measurement device, and a mobile concrete pump.

Disclosed are an integral lifting system and lifting method for assembled members. The integral lifting system includes fixing mechanisms and more than four vertical stand columns. The four vertical stand columns are located at four corners of a building, the building is located in a region encircled by the vertical stand columns, a transverse rail beam is disposed between every two vertical stand columns, one end of the transverse rail beam is mounted at the top of one vertical stand column, and the other end is mounted on the top of the other stand column. The transverse rail beam is provided with an operation trolley, a jib crane is disposed on an upper surface of the operation trolley, and a lifting mechanical arm is disposed on an outer side surface of the operation trolley. A hydraulic jacking mechanism is disposed at the bottoms of the vertical stand columns.

Disclosed are an integral lifting system and lifting method for assembled members. The integral lifting system includes fixing mechanisms and more than four vertical stand columns. The four vertical stand columns are located at four corners of a building, the building is located in a region encircled by the vertical stand columns, a transverse rail beam is disposed between every two vertical stand columns, one end of the transverse rail beam is mounted at the top of one vertical stand column, and the other end is mounted on the top of the other stand column. The transverse rail beam is provided with an operation trolley, a jib crane is disposed on an upper surface of the operation trolley, and a lifting mechanical arm is disposed on an outer side surface of the operation trolley. A hydraulic jacking mechanism is disposed at the bottoms of the vertical stand columns.