Patent ID: 6460672
Filing Date: 2002-10-08
Classification: F16P

Abstract:
A safety device for a torque limiter, said torque limiter having:a driven motion transmission shaft; a driving shaft for transmitting motion to a working implement; an external body rigidly coupled to said driving shaft and including locking slots; a seat provided in said external body; an internal body, accommodated in said seat, said internal body being rigidly coupled to the driven motion transmission shaft and being provided with a series of radial sliding seats; elastic means provided in said sliding seats; tabs movable in said sliding seats, against a biasing force exerted by said elastic means, alternatively between a centrifugal position providing engagement and transmission in said locking slots formed in said external body and a centripetal position for disengagement from said locking slots and for stopping the transmission; a centered plate which forms a protruding ring for wedging and centrifugally pushing said tabs, movement of said tabs being activated by way of said centered plate; the safety device, comprising: pusher means for axially pushing said centered plate into a configuration for forced disengagement from said tabs, said pusher means being interposed between said internal body and said centered plate; and actuation means which are controllably actuatable to act on said pusher means for axially pushing said centered plate into said configuration for forced disengagement from said tabs.