Abstract: A hydropneumatic system for suspensions of vehicle wheel assemblies is provided, for each suspension, with a respective hydropneumatic cylinder having a first and a second body, which can move axially relative to each other and define respective chambers, axially separated from each other via a piston element; the latter is coupled in a fluid-tight manner to the second body and floats between two stroke end positions in response to the pressures in the two chambers; the two chambers of each hydropneumatic cylinder communicate respectively with a hydraulic supply line and with a pneumatic supply line; the system further has a pressurization device which sets the pressure in the pneumatic supply line to a value at least equal to the pressure in the hydraulic supply line.

Abstract: A freight vehicle has a frame defining a support surface for the goods to be transported, a plurality of rubberized wheel assemblies with suspensions, the height of which can be adjusted to shift the support surface between a lowered loading position and a raised transport position, and a driver's cab arranged beneath said support surface; the cab being coupled to, and overhanging, the frame by means of an articulated quadrilateral transmission unit and being shifted by pneumatic actuators configured to vertically move the whole cab in relation to the support surface between two extreme end positions, one approaching the support surface and one spaced apart from said support surface, and to arrange the cab in a cushioned intermediate position for the transport of the goods.

Abstract: A device for handling an artifact of substantially cylindrical shape, having a bed (10) and supporting means fixed to the bed (10) and connected to actuators. The supporting means being positioned along at least an arc of circumference lying in a plane orthogonal to the development axis ? of the bed (10) and having rolling elements (3) adapted to support and handle an artifact, at least one of them being motorized. Each rolling element (3) is connected to one of a plurality of corresponding actuators operatively connected to each other and adapted to regulate a movement of the rolling elements (3) in response to forces exerted by the artifact on each rolling element (3), in such a way as to distribute the forces uniformly on each rolling element (3) to position one or more resultants of the forces in one or more points.