Valve for gradual delaying control of full engagement of the parking brake in hydraulic braking circuits for vehicles

A valve for gradual delayed control of full engagement of the parking brake in hydraulic braking circuits for vehicles is constituted by a prism-shaped body (1a) with a first coupling port (4), for piped connection to a control and supply valve (6) for activating the parking braking action, and at least one second coupling port (7), for piped connection to the braking circuit of the vehicle, the first and second ports (4, 7) being mutually connected by way of at least one direct duct (8) and at least one secondary duct (9) which are alternately active, the direct duct (8) being controlled by way of a corresponding first valve means (10) and the secondary duct (9) being regulated by way of means (11) for reducing the useful section and supplying driving means (12) for driving a second valve means (13) which is interposed between the first port (4) and the first valve means (10).