Patent ID: 8408273

Claim:
A bead breaking unit for tire changing machines, comprising an arm having a first extremity associated turnable with a support structure and a second extremity having a bead breaking tool, said arm being suitable for oscillating between an away position, wherein said bead breaking tool is positioned substantially at a distance from said support structure, and a work position, wherein said bead breaking tool is positioned substantially close to said support structure, at least an actuator device having at least a mobile element associated sliding with said arm, at least a drive element for driving said arm, associated with said mobile element and suitable for operating during the movement of said mobile element from an extracted position to a retracted position to move said arm towards said work position and at least an apparatus of temporary coupling between said mobile element and said arm, suitable for operating during the movement of said mobile element from said retracted position to said extracted position to move said arm from said work position to said away position.