Pneumatic tires
AssigneeCompagnie Generale des Etablissements Michelin, raison sociale Michelin & Cie
InventorJacques Boileau
Life of this patent
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Abstract
The durability and stability of the beads of a radial ply pneumatic tire are improved by making the tensions acting on the main radial carcass ply and on the portion thereof folded over the bead ring different from each other and having the tension acting on the main radial carcass ply greater than the tension acting on the folded-over portion.
Claims5
In a pneumatic tire with a crown reinforcement formed of at least two crossed oblique plies of cables and a carcass reinforcement comprising at least one ply of radial cables the portion of which folded around the bead ring terminates in a part which is parallel to the carcass reinforcement, the improvement which comprises:
- a. the equilibrium curve of the carcass reinforcement passes between the center of gravity of the radial section of the bead ring and the point of contact of the carcass ply with the radial cross section of the bead ring, and
- b. the end of the radius from which the folded-over portion assumes an arrangement parallel to the carcass reinforcement is located at a distance from the center of gravity of the radial section of the bead ring of between 1/5 and 1/3 of the height of the pneumatic tire on its rim.
Dependencies are inferred from the claim text.