Method and device for dismounting self-supporting tyres

Abstract

A method for dismounting self-supporting tires (1) from the relative rim (2), said self-supporting tires comprising an outer cover (10) that contains a rigid auxiliary ring (16) provided with two flexible sidewalls (18, 19). Said method comprises the operating steps of: lifting a first bead (14) of the outer cover (10) away from the rim (2) in a usual manner, so as to make a first sidewall (18) of the auxiliary ring (16) accessible; inserting a dismounting tool (5) between the elastic edge of said first sidewall (18) of the auxiliary ring (16) and the edge of the rim (2); moving said dismounting tool (5), so as to grip the elastic edge of said first sidewall (18) and to turn a part thereof towards the outside; pushing said turned part of the first sidewall (18) outwards, making it slide in contact with the dismounting tool (5), until it passes over the edge of the rim (2); rotating the auxiliary ring (16) according to the central axis (A) of the rim (2), so that the entire elastic edge of the first sidewall (18) interacts with the dismounting tool (5), and is thus completely lifted away from the rim (2); lifting both the second sidewall (19) of the auxiliary ring (16) and the second bead (15) of the outer cover (10) away from the rim (2) in the usual manner.

Dependencies are inferred from the claim text.