Abstract: A drive comprising a first group of cylinders of a radial hydraulic pump, rotating in relation to the drive frame about a first axis, and torsionally integral with the input shaft of the drive and with a housing inside which the first group of cylinders rotates; a second group of cylinders of a radial hydraulic motor, rotating in relation to the frame about a second axis; an output shaft, the axis of which is located between the aforementioned axes, and which is integral with a gear meshing with a gear integral with the housing in which the first group of cylinders rotates, and with another gear integral with the second group of cylinders; a mechanism for varying displacement of the first and second group of cylinders; and a distributing mechanism for alternately connecting the cylinders in the first group with those of the second group.

Abstract: A support structure for a motor vehicle that includes a passenger compartment and is resiliently connected to the vehicle wheels by front and rear suspensions. The structure includes a central frame which defines the passenger compartment of the vehicle. In addition, the structure includes front and rear frames which are connected by respective resilient connection devices to the front and rear of the central frame. The front and rear frames are provided with attachment devices for connecting with the front and rear suspension, respectively. The rear frame supports the motor vehicle engine, the rear differential and the torque divider, and the front frame supports the other transmission members, such as the front differential.

Abstract: The front frame is resiliently connected to a central frame of the motor vehicle supporting structure and is resiliently connected to each front wheel by means of a resilient suspension; this frame substantially comprises a plate engageable against the ends of the attachment beams of the central frame and at least two pairs of first arms substantially orthogonal to the plate itself; the said plate includes a substantially flat wall in which are formed perforations and from which project a plurality of ribs to form a flat reticular structural element, and connection of the said plate to the central frame is achieved by means of sleeves made of resilient material and disposed in corresponding nodes of the said reticular structural element.

Abstract: The rear frame is resiliently connected to a central frame of the support structure and is adapted to support the engine and some of the members of the transmission and is resiliently connected to each rear wheel of the motor vehicle; this frame substantially comprises a pair of first ring-shape structural elements each of which is adapted to support a resilient suspension and comprises a plurality of limbs connected together; the frame further includes a plurality of cross members connecting together the ring-shape structural elements to form with them a single lattice structure, as well as two pairs of longitudinal side members each of which has one end fixed to one of the ring-shape structural elements and the other end adapted to be connected resiliently to the central frame.