Patent ID: 8746317

Claim:
A working-tool ( 17 ) orienting device in a tire demounting machine ( 1 ) comprising: a base ( 2 ) supporting a rotatable apparatus ( 4 ) around a rotation axis (Z), the base being configured to rest and block thereon rims (R 1 , R 2 , R 3 ) of wheels of vehicles; a column ( 3 ) extending from said base ( 2 ) and having one fastening end ( 103 ) to said base and one opposite end ( 203 ) facing upward, a column longitudinal axis being defined between said fastening end and said opposite end; one arm ( 11 ) transversally supported on said opposite end ( 203 ) of said column ( 3 ), the arm being movable at a distal ( 211 ) end from said column ( 3 ), with respect to said rotatable apparatus ( 4 ), between a working position and a resting position; a supporting arrangement ( 13 , 14 , 16 ) of said working-tool ( 17 ) associated to said distal end ( 211 ); a joining system ( 12 ; 18 , 21 ; 412 ) interposed between said supporting arrangement ( 13 , 14 , 16 ) and said distal end ( 211 ), the joining system ( 12 ; 18 , 21 ; 412 ) being configured to make said supporting arrangement ( 13 , 14 , 16 ) movable with respect to said arm ( 11 ); and a connecting member ( 22 ; 301 , 310 , 317 , 121 , 502 , 509 , 510 ) interposed between said joining system ( 12 ) and said column ( 3 ) and movable together with said arm ( 11 ), the connecting member being configured to make said joining system ( 12 ) rotate with respect of said arm ( 11 ), such to maintain said working-tool ( 17 ) substantially constantly oriented in said working position with respect of said rims (R 1 , R 2 , R 3 ) during rotation movements of said arm ( 11 ) with respect of said column ( 3 ).