Abstract: A locking/unlocking system for traction systems actuated by pedal levers, which includes: a blocking element (1); a receiving element (10); an automatic activation means (3) for coupling and uncoupling the blocking element (1) of the receiving element (10); at least, a control means (16) for controlling the automatic activation means (3); at least, a switch (15a, 15b) for turning the control means on and/or off (16); and at least, a power source (17). A pedal lever (9) for traction systems actuated by pedal levers, which includes: a locking/unlocking system, in accordance with this invention. A traction system actuated by pedal levers, which in turn includes: a pedal lever (9) in accordance with this invention on each of the two ends of the central axis (8), which is introduced and fastened to the adapter (7) of the freewheel (6), or directly onto the freewheel (6) of the lever (9).

Abstract: A locking/unlocking system for traction systems actuated by pedal levers, which includes: a blocking element (1); a receiving element (10); an automatic activation means (3) for coupling and uncoupling the blocking element (1) of the receiving element (10); at least, a control means (16) for controlling the automatic activation means (3); at least, a switch (15a, 15b) for turning the control means on and/or off (16); and at least, a power source (17). A pedal lever (9) for traction systems actuated by pedal levers, which includes: a locking/unlocking system, in accordance with this invention. A traction system actuated by pedal levers, which in turn includes: a pedal lever (9) in accordance with this invention on each of the two ends of the central axis (8), which is introduced and fastened to the adapter (7) of the freewheel (6), or directly onto the freewheel (6) of the lever (9).

Abstract: The invention consists of a differential system which controls the traction of at least four wheels of a vehicle, and includes: a differential mechanism (1) connected to the free extremities of the axles (3 or 6) of the wheels (4 or 7) of the vehicle; this provides at least one mechanism of power transmission for each side of the differential mechanism (1), where the driving element (8) connects to the axle (3 or 6) to which the differential mechanism is connected (1) and the driven element (10) to the axle without differential mechanism (1), of the wheels (4 and 7) of the same side of the vehicle, in order to transmit power to the said wheels through the transmission system (9); a freewheel unit (5) is placed on the trajectory of the power transmission which goes from the differential mechanism (1) to its respective front wheel (7); and at least one braking mechanism for braking the wheels of the vehicle.

Abstract: This invention relates to an articulated mannequin, comprising various assembly mechanisms that keep the limbs thereof assembled, in which said limbs may be rigid or flexible as well as hollow or solid. Said assembly mechanisms include, at least: magnetic connection mechanisms, magnetic locking and connection mechanisms, adjustable locking and connection mechanisms, adjustable twisting and connection mechanisms, free movement and connection mechanisms, automated movement and connection mechanisms, compound disc mechanisms, double ball-and-socket joint mechanisms and compression ball-and-socket joint mechanisms. Said mechanisms are characterized in that they are inserted in the material of the limbs of the articulated mannequin, and in that they give the articulated mannequin a complete range of movement and versatility, enabling it to take up any human posture and be installed in almost any location.