Patent ID: 6880605

Claim:
An automatic device for demounting a tire ( 6 ) from a wheel rim ( 5 ), comprising: a frame ( 7 ) defining a longitudinal axis, rotary and support means ( 3 , 4 ) for rotating and supporting the wheel rim and the tire, said means being associated with said frame, a demounting tool ( 15 ) rotatable around a pivot ( 26 ) located on a bar ( 14 ) and on an intermediate portion of said tool ( 15 ), the tool ( 15 ) operatively connected to a first positioning/operating means ( 100 ) for positioning said tool in a seeking and first gripping position in which the tool is parallel to said longitudinal axis or rotated around the pivot in a first direction towards the center of the wheel rim for gripping a tire bead, and a second positioning/operating means ( 200 ) for operating said tool for extracting said tire bead from the wheel rim in which the tool is positioned parallel to said longitudinal axis or rotated around the pivot in a direction opposite to said first direction, said first positioning/operating means further including a connecting rod ( 19 , 25 ), and wherein one end of said tool is hinged to said connecting rod, an opposite end of said connecting rod being coupled to said bar by a lever linkage ( 21 ), and said second positioning/operating means further including an advancing and withdrawing means ( 10 ), and wherein said bar ( 14 ) further being fixed to said advancing and withdrawing means.