MINUTE LEAKAGE PREVENTIVE DEVICE FOR AVOIDING OIL LEAKAGE, FOR SIGNAL DISPLAY OR FOR EQUAL USE IN HYDRAULIC DEVICE

摘要

A unidirectional valve (7) forms a reduced meatus which extends in the direction of the obturator (23) movement, which meatus is to be passed through by possible microleaks in case of losses in the actuator branch (3); a considerable run of the obturator (23) in the presence of microleaks and of consequent pressure losses is thus obtained; a sensor (47) detects the obturator displacements.