Parking brake, particularly for a farm tractor, with a safety device

摘要

A parking brake (10) having an electromechanical and hydraulic device (11, 19, 23, 40) for gripping a pack of movable sectors (18) connected mechanically to the wheels to exert the desired braking force on the wheels. The parking brake (10) is characterized by having an oil flow regulating valve assembly (40), in turn having a first control solenoid valve (41) and a second safety solenoid valve (42) in series with each other.