Abstract: An electronic control device for management of the steering in earth-moving machines, essentially comprises a programmable logic electronic control unit (1) which is arranged as an interface between a pushbutton console (2) for setting a steering mode and an input diagnostics system (3) associated with the functions of the gearcase and the engine and with positioning of the wheels of the machine. The setting of a steering mode on the pushbutton console (2) is made possible by simultaneous selection of at least two switches (50). The input diagnostics system (3) of the electronic control unit (1) comprises a front wheel alignment sensor (28) and a rear wheel alignment sensor (29) which are respectively positioned in the region of the front and rear axles of the earth-moving machine and are designed to detect respectively the alignment position of the front and rear wheels with respect to the longitudinal axis of the machine itself.

Abstract: A variable-geometry stabilizing foot, in particular for earth-moving vehicles, comprising a support member (1) able to rotate about a fulcrum (3) associated with the chassis of a vehicle to be stabilized and a extendable arm (5) slidably mounted on this support member (1). A control linkage (9) is also provided, being hinged with the chassis (2) of the vehicle and with the extendable arm (5) is provided at the bottom end with a support foot (8) able to perform vertical displacements when a hydraulic jack (13) moves the support member (1) between a recovery position (15) and an operative position (16). In the recovery position (15) the stabilizing foot is thus arranged so as to be retracted and take up little space on the chassis (2) of the vehicle, while in the operative position (16), the stabilizing foot is rotated through an angle (.alpha.) towards the ground with respect to the recovery position (15).

Abstract: Hydraulic control circuit for working components, in particular in earth-moving machines, said machines comprising a front group provided with actuators controlled by first hydraulic distributors (1,2) and a rear excavator group provided with actuators controlled by second hydraulic distributors (3-8), in said rear excavator group there being present a main arm actuated by a main actuator (13) controlled by a main distributor (3) located upstream of the remaining second distributors (4-8). The main actuator (13) supplies in series the remaining second distributors (4-8) when the pressure downstream thereof is less than a predetermined value and instead discharges the fluid under pressure when said pressure downstream thereof reaches or exceeds said predetermined value. In the front group there is also provided an additional distributor (A-B) which sends the fluid under pressure immediately downstream of the main distributor (3) of the rear excavator group via a bypass line (23).