SAFETY DEVICE FOR SPRING/DAMPER UNITS

摘要

A safety device (10, 110) for spring/damper units comprising at least one part of the bottom (11, 111) or jacket (11a, 111a) of a spring/damper unit (12, 112) provided with a breakable partition (13, 113) that is subjected to the pressure determined by the gas compressed within a compression and expansion chamber (14, 114) of the spring/damper unit; the chamber (14, 114) is formed between the bottom (11, 111), the jacket (11a, 111a) and the piston (15, 115) of the unit (12, 112); the breakable partition (13, 113) has such a thickness as to break in the presence of a pressure inside the chamber (14, 114) that is greater than, or equal to, a preset pressure value; the breakable partition (13, 113) is associated with a longitudinally elongated element (16, 116) that lies within the compression and expansion chamber (14, 114) for such a length as to affect part of the piston (15, 115) during its descent before it performs a stroke that exceeds the predefined stroke; the longitudinally elongated element (16, 116) is supported by way of yielding supporting means adapted to allow, in the presence of a preset force that pushes, in the direction of operation of the unit (12, 112), against the longitudinally elongated element (16, 116), the element to move so as to break the breakable partition (13, 113) or so that it breaks itself, causing the opening, on the bottom (11, 111) or on the jacket (11a, 111a), of an outlet for the gas toward the outside.