Brake caliper piston backward movement limiting device for motor vehicle, has valves automatically closed when positive pressure falls, such that pressure is not negative to eliminate aspiration problems and backward movement of pistons

摘要

The device has two valves (V1, V2) at outlets automatically closed under an action of pressure during positive pressure in hydraulic circuits (11, 12) e.g. metallic tube network, falls and passes a null value, such that the pressure is not negative in fluid outlets (3, 4) of a master cylinder (10) when flow of the braking fluid is inversed to a brake pedal. The pressure is not negative for eliminating aspiration problems of pistons (25, 35) of calipers (24, 34) of brake receptors (20, 30) and backward movement of the pistons.