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AssigneeCompagnie Generale des Etablissements Michelin - Michelin & Cie
InventorsJean-Jacques Drieux, Olivier Muhlhoff
Estimating the term…
A tire with a radial carcass reinforcement, when viewed in meridian section, includes a first bead, the seat of which is inclined towards the outside, the heel of the bead being axially on the inside and being reinforced by at least a reinforcement ring, the toe of the bead being axially on the outside and having a rubber wedge section made of rubber mix, the wedge being defined by two sides, the said rubber mix having a Shore A hardness greater than the Shore A hardness(es) of the rubber mixes located axially and radially above the bead ring and above the rubber wedge section. The carcass reinforcement is wound around the bead ring, passing from the inside to the outside to form an upturn extending along the radially inner side of the rubber wedge section, then along the side opposite the apex A, and then covering axially and radially, at least in part, the outside of the rubber section above the wedge section, the said upturn having an end located radially above the reinforcement annular ring of the bead and axially between the straight line P1 extending the radially outer side of the wedge section and the straight line P2 perpendicular to the axis of rotation and tangent at N to the said annular ring.
A tire, viewed in meridian section, having a radial carcass reinforcement and a first bead, the seat of which has a generatrix the axially inner end of which is on a circle of a diameter greater than the diameter of a circle on which is the axially outer end, the bead having a heel axially on the inside and reinforced by a reinforcement ring, annular, inextensible and coated with a rubber mix, and a toe axially on the outside, the tire further comprising a section made of rubber mix in the form of a wedge delimited by two sides having an apex A located beneath the meridian section of the coated bead ring, the radially outer side forming with a line parallel to the axis of rotation passing through said apex A an acute angle ø1, open radially and axially towards the outside, and the radially inner side forming with said parallel line an acute angle ø2, open radially towards the inside, the rubber mix forming the rubber section axially adjacent to the bead ring having a Shore A hardness greater than the Shore A hardness of rubber mixes located axially and radially above the bead ring and above the rubber section, characterized in that the carcass reinforcement of the said tire is wound around the bead ring passing from the inside to the outside to form an upturn extending along the radially inner side of the rubber section in the form of a wedge, then along the side opposite the apex A, and then covering axially and radially on the outside, at least in part, the rubber section radially above the rubber wedge section, the said upturn having an end located radially above the reinforcement annular ring of the bead and axially between a straight line P1, extending the radially outer side of the wedge and a straight line P2 perpendicular to the axis of rotation and tangent at N to the said annular ring.
Dependencies are inferred from the claim text.