Patent ID: 7798196

Claim:
A work head with bead breaker for a tire mounting-demounting machine having a bead breaker arm, the work head configured for bead breaking of a tire from an edge of a rim of a tired wheel, the work head comprising: a head-holder support configured to be secured to the bead breaker arm; at least one bracket member pivoted at one end thereof to said head-holder support around a pivoting axis; a bead breaker tool supported at a second end opposite the one end of said at least one bracket member and configured to engage a bead of the tire; a lever element, pivoted to said head-holder support and bearing a feeler pin arm portion configured to control, said lever element during the bead breaking, whereby the lever element is configured to be angularly moved between a work position, in which the lever element is pressed against said bead breaker tool, and at least one rest position, in which the lever element is angularly positioned at a distance from said bead breaker tool; and a biasing member having a first end and a second end, the biasing member being secured at the first end to the work head, and the second end positioned and configured to press, in the work position, the lever element so as to keep the lever element in the work position.