Abstract: A device for selecting the tools of the tool carrying head of tire removal machines in general comprises a hydraulic cylinder-piston unit (17) arranged to cause a tool carrying head (6, 7) to rotate, and connected in parallel with a hydraulic cylinder-piston unit (11) which causes a bar (1) on which the head (6, 7) is rotatably mounted to swivel in a vertical plane. A sequence valve (31) is provided in that pipe connecting together the cylinder-piston units (11), (17) through which the oil passes for moving the bar (1) into its rest position, and a free-wheeling linkage (20, 23, 24) is disposed between the bar (1) and head (6, 7) to enable the head (6, 7) to rotate in only one direction, and is associated with a positioning element (25) which fixes said head in position at every half revolution.

Abstract: A tire removal machine with its tool carrying head and automatic centering unit mutually mobile, comprising two parallel slides (12, 13) which swivel overall together with a support pivot (4) and are driven with relative mutual approach and withdrawal motion by a single drive unit (14, 15, 36), and with which there are respectively associated a slidable tool carrying head (39) and a rotatable automatic centering unit (26) for locking the wheel rims; during the operational stages the longitudinal axes of the head (39) and unit (26) are mutually orthogonal and incident, and the head (39) is disposed on the respective slide (12) by way of two automatic devices (60, 61, 62, 63, 64; 49, 51, 52, 54) which, during the return travel of the head (39), are arranged respectively to cause it to swivel outside the profile of the tire (3) being worked, and to torsionally release it with respect to its own swivel support (44).

Abstract: Self-centering device for generally locking motor vehicle wheels on to balancing machine shafts, comprising a normal drive flange rigid with the threaded balancing shaft; a sleeve slip-mounted on the balancing shaft and from the central region of which there projects a flange, the opposing faces of which are provided with telescopic means for centering and locking the rim of a wheel to be balanced; and a collar mounted on the balancing shaft and provided with swivel means for axially engaging and disengaging the collar with and from the balancing shaft.