Mechanism for progressive braking

A mechanism for progressive braking for brakes comprising friction elements secured to a vehicle having wheels, which act on frictional tracks secured to the wheels, the friction elements being actuated by means of a primary hydraulic circuit;

• characterized in that the friction elements comprise primary sectors actuated by the primary hydraulic circuit and secondary sectors actuated by, at least, one secondary hydraulic circuit;
• said friction elements are mounted on the vehicle through attachment means that may be partially moved in the direction of rotation of the frictional tracks;
• and the partially moveable attachment means are associated with, at least, one hydraulic actuator, which regulates the pressure in the secondary hydraulic circuit, in order to regulate the braking pressure of the secondary sectors according to the movement of the friction elements, wherein the partially moveable attachment means comprise rails through which slide carriages equipped with derailment retainers travel.