Abstract: An hydraulic apparatus (100) for energy recovery in an operating machine comprising an hydro-pneumatic accumulator (14) able to accumulate, during the operation of lowering of an operative load (111) by an operating machine (1), a volume of oil with a fixed amount of an inert fluid, and the pre-charge pressure (Po) of which, before the beginning of the accumulation, is adjusted according to the variations of pressure of the oil inside the hydraulic cylinders (12,13) which act on the operative load (111), in such a way to accumulate the maximum hydraulic energy made available by the lowering of operating load (111), that is to maximize the average pressure of hydro-pneumatic accumulator (14) during the phase of accumulation of energy.

Abstract: A method and device for longitudinally balancing an agricultural vehicle, in particular a tractor, whereby at least one sensor, for detecting at least one respective stress affecting a longitudinal attitude of the agricultural vehicle, controls an actuating device of a ballast to move the ballast longitudinally along the agricultural vehicle, which at least partly compensates for the stress.

Abstract: A hybrid traction system for the traction of a vehicle comprises an internal combustion engine, at least a first electric machine and at least a second electric machine, first transmission means suitable for being connected mechanically to said internal combustion engine and to at least one of said electric machines, second transmission means suitable for being connected mechanically to at least one of said electric machines and to the wheels of the vehicle; the system comprises furthermore connecting or restraining means suitable for enabling mechanical power to be transmitted to the wheels of the vehicle only by the internal combustion engine through said first transmission means and said second transmission means. This allows to drive the vehicle using only the internal combustion engine.

Abstract: A vehicle, having a main body is equipped to be fitted mechanically with devices to form a wheeled vehicle, or with devices to form a crawler vehicle. The main body having of the vehicle houses the common components utilized in both configurations such as the engine and the gear box of the vehicle.

Abstract: A crawler traction device for a crawler vehicle, in particular a tractor, the device having a carriage, a drive sprocket rotating about a first axis, an idler wheel rotating about a second axis parallel to the first axis. The track is looped about the drive sprocket and the idler wheel and meshes with the drive sprocket along a meshing arc. The traction device has a noise and vibration damping device having an auxiliary roller which rotates about a third axis parallel to the first axis and is eccentric with respect to the drive sprocket as well as smaller in diameter than the drive sprocket. The noise and vibration damping device only cooperates with the track along a portion of the track located, in use, immediately upstream from the meshing arc and interposed between the auxiliary roller and the terrain.

Abstract: A steering system for a vehicle wherein the first and second axle shafts are driven by a power shaft powered by an engine. A differential gear is interposed between the power shaft and the first and second axle shafts. The steering system has a first hydraulic unit associated with the first axle shaft, a second hydraulic unit associated with the second axle shaft, a hydraulic circuit connecting an input of the first hydraulic unit to an output of the second hydraulic unit and an output of the first hydraulic unit to an input of said second hydraulic unit. A control unit is connected to the hydraulic circuit for varying a flow rate of hydraulic fluid in the first and second hydraulic units and an actuator associated with the control unit for controlling said control unit. The actuator is responsive to rotation of a steering wheel.

Abstract: A crawler traction device for a crawler vehicle, in particular a tractor, the device having a carriage, a drive sprocket rotating about a first axis, an idler wheel rotating about a second axis parallel to the first axis. The track is looped about the drive sprocket and the idler wheel and meshes with the drive sprocket along a meshing arc. The traction device has a noise and vibration damping device having an auxiliary roller which rotates about a third axis parallel to the first axis and is eccentric with respect to the drive sprocket as well as smaller in diameter than the drive sprocket. The noise and vibration damping device only cooperates with the track along a portion of the track located, in use, immediately upstream from the meshing arc and interposed between the auxiliary roller and the terrain.

Abstract: A metal track for crawler vehicles, the track having a metal chain hinged with substantially rectangular metal shoes, each of which has a work surface with arrow-shaped teeth defined by a front portion of one arrow-shaped tooth and a rear portion of another arrow-shaped tooth spaced apart on the work surface and complementary in shape; each portion of arrow-shaped tooth cooperating with a complementary portion on a respective adjacent shoe to define a complete arrow-shaped tooth.

Abstract: A motor-vehicle (AV), in particular a tractor, having a front steerable device (BL). The motor-vehicle (AV) is characterized in that the front steerable device (BL) (ballast, implement, PTO) is hinged to a chassis (FR), and in that the front steerable device (BL) is rotated by a mechanism (MC) partly integral with a rotatable front yoke (11). The mechanism (MC) is activated by rotation of the front yoke (11).

Abstract: An active suspension system for a rigid beam tractor axle in which the axle is connected to the chassis by two orthogonally oriented pivot points and axle movement is controlled by double-acting suspension actuators managed by a control system to improve the ride and handling characteristics of the tractor.

Abstract: A steering system for a vehicle wherein the first and second axle shafts are driven by a power shaft powered by an engine. A differential gear is interposed between the power shaft and the first and second axle shafts. The steering system has a first hydraulic unit associated with the first axle shaft, a second hydraulic unit associated with the second axle shaft, a hydraulic circuit connecting an input of the first hydraulic unit to an output of the second hydraulic unit and an output of the first hydraulic unit to an input of said second hydraulic unit. A control unit is connected to the hydraulic circuit for varying a flow rate of hydraulic fluid in the first and second hydraulic units and an actuator associated with the control unit for controlling said control unit. The actuator is responsive to rotation of a steering wheel.

Abstract: A hybrid traction system for the traction of a vehicle comprises an internal combustion engine, at least a first electric machine and at least a second electric machine, first transmission means suitable for being connected mechanically to said internal combustion engine and to at least one of said electric machines, second transmission means suitable for being connected mechanically to at least one of said electric machines and to the wheels of the vehicle; the system comprises furthermore connecting or restraining means suitable for enabling mechanical power to be transmitted to the wheels of the vehicle only by the internal combustion engine through said first transmission means and said second transmission means. This allows to drive the vehicle using only the internal combustion engine.

Abstract: A metal track for crawler vehicles, the track having a metal chain hinged with substantially rectangular metal shoes, each of which has a work surface with arrow-shaped teeth defined by a front portion of one arrow-shaped tooth and a rear portion of another arrow-shaped tooth spaced apart on the work surface and complementary in shape; each portion of arrow-shaped tooth cooperating with a complementary portion on a respective adjacent shoe to define a complete arrow-shaped tooth.

Abstract: A vehicle, having a main body is equipped to be fitted mechanically with devices to form a wheeled vehicle, or with devices to form a crawler vehicle. The main body having of the vehicle houses the common components utilized in both configurations such as the engine and the gear box of the vehicle.

Abstract: A method and device for longitudinally balancing an agricultural vehicle, in particular a tractor, whereby at least one sensor, for detecting at least one respective stress affecting a longitudinal attitude of the agricultural vehicle, controls an actuating device of a ballast to move the ballast longitudinally along the agricultural vehicle, which at least partly compensates for the stress.

Abstract: A crawler traction device for a crawler vehicle, in particular a tractor, the device having a carriage, a drive sprocket rotating about a first axis, an idler wheel rotating about a second axis parallel to the first axis. The track is looped about the drive sprocket and the idler wheel and meshes with the drive sprocket along a meshing arc. The traction device has a noise and vibration damping device having an auxiliary roller which rotates about a third axis parallel to the first axis and is eccentric with respect to the drive sprocket as well as smaller in diameter than the drive sprocket. The noise and vibration damping device only cooperates with the track along a portion of the track located, in use, immediately upstream from the meshing arc and interposed between the auxiliary roller and the terrain.

Abstract: An active suspension system for a rigid beam tractor axle in which the axle is connected to the chassis by two orthogonally oriented pivot points and axle movement is controlled by double-acting suspension actuators managed by a control system to improve the ride and handling characterstics of the tractor.

Abstract: A motor-vehicle (AV), in particular a tractor, having a front steerable device (BL). The motor-vehicle (AV) is characterized in that the front steerable device (BL) (ballast, implement, PTO) is hinged to a chassis (FR), and in that the front steerable device (BL) is rotated by a mechanism (MC) partly integral with a rotatable front yoke (11). The mechanism (MC) is activated by rotation of the front yoke (11).

Abstract: An agricultural tractor rear suspension system having a longitudinally extending suspension arm pivotally coupled to the tractor chassis at one end and to a planetary gearbox at the opposing end, a differential connected to the tractor chassis, and a driveshaft rotatably supported at one end by the planetary gearbox and supported at the other end by the differential housing wherein the driveshaft is configured to resist suspension arm flexure by communicating tensile and compressive forces from the suspension arm to the tractor chassis.

Abstract: A steerable rear suspension for a tractor includes a chassis comprising a front end, a rear end, a left side and a right side; an engine mounted on the chassis; a pair of steerable front wheels coupled to the front end, left and right side of the chassis; a left rear suspension including a left rear suspension arm pivotally coupled to the chassis at a leading end of the suspension arm, and a first steerable planetary gear system mounted on a trailing end of the suspension arm; a right rear suspension including a right rear suspension arm pivotally coupled to the chassis at a leading end of the suspension arm, and a second steerable planetary gear system mounted on a trailing end at the right suspension arm; and left and right rear wheels driven by the first and second planetary gear systems.