Patent ID: 7708045

Claim:
A spindle for fitting vehicle wheel rims on workshop machines, comprising at least one frame associable in rotation around a work axis with a workshop machine, and at least three gripping adapters for gripping the rim of a wheel associable with said frame and moving along respective approach and away movement directions with respect to said work axis, a plurality of fluid-operated piston-cylinder assemblies, each of said plurality of fluid-operated piston-cylinder assemblies being associated with a respective one of said at least three gripping adapters for moving the respective gripping adapter along the corresponding approach and away movement direction, at least three racks, each of which is associated with a respective one of said gripping adapters and extends substantially parallel with a respective one of said approach and away movement directions, and at least one pinion meshed with said racks to synchronize movement of the racks, said pinion being freely rotatable around an output shaft of a motor.