Patent ID: 8205372

Claim:
A safety device ( 1 ) for a firearm ( 11 ), comprising: actuator means ( 10 , 10 ′, 19 , 20 , 21 , 21 ′, 22 ), suitable to engage with mechanical parts of said firearm ( 11 ) so as to alternately prevent or permit operation of said firearm; and a control unit ( 2 ), operatively connected with said actuator means ( 10 , 10 ′, 19 , 20 , 21 , 21 ′, 22 ), said control unit ( 2 ) comprising transceiving means ( 3 ) configured to exchange signals with certification outer means of an authorised user (U) for codified remote control of said actuator means ( 10 , 10 ′, 19 , 20 , 21 , 21 ′, 22 ), wherein said actuator means comprises i) an electric motor ( 19 ) having a shaft ( 20 ) operatively coupled with said control unit ( 2 ), ii) a body ( 22 ) slidable within said firearm ( 11 ) and engageable with said mechanical parts of said firearm ( 11 ), and iii) means for transforming a rotary motion of said motor ( 19 ) into a translation motion of said body ( 22 ), the transforming means coupled with said motor ( 19 ) and said body ( 22 ), an activation of said electric motor ( 19 ) enabling a translatory motion of said body ( 22 ) to enable said body ( 22 ) to alternately engage or disengage from said mechanical parts of said firearm ( 11 ) in order to alternately prevent or permit operation of said firearm, and wherein said motion transformation means comprise i) a worm screw ( 21 ) keyed on said shaft ( 20 ), ii) a worm comprising a first and a second half-worm screws ( 24 , 25 ) housed within a cavity ( 22 ″) obtained within said body ( 22 ), said first and second half-worm screws ( 24 , 25 ) being adjacent each other and a threaded channel being realized between them, within which said worm screw ( 21 ) is inserted, and iii) resilient means ( 26 ) between the inner wall of said body ( 22 ) and said second half-worm screw ( 25 ), suitable to permit compensation of tolerances and a safe coupling of said worm screw ( 21 ) within said threaded channel realized between said first and second half-worm screws ( 24 , 25 ).