Heavy-duty radial tire with ply of oblique elastic cords radially inward of the carcass

DETAILED DESCRIPTION I claim: 1.
A large, heavy-duty pneumatic tire for construction equipment and the like comprising two beads, a continuous carcass extending from one bead to the other and substantially formed of radial cords, and a tread with a tread reinforcement which is formed by at least two plies of parallel cords in each ply in crosswise superimposed arrangement from one ply to the next one and forming with the longitudinal direction of the tire angles of at most 30.
degree.
, said tread reinforcement being less wide than the tread and located radially outside said carcass to restrain the latter and having a slightly curved meridian profile, said carcass, under the effect of the restraint by said tread reinforcement, assuming a meridian profile which in the region covered by said tread reinforcement is less curved than the normal equilibrium profile and in the region of the shoulders of the tire is more curved than the normal equilibrium profile, said tire comprising also at least one ply of oblique elastic cords which form angles of at most 30.
degree.
with the radial cords of the carcass, said ply of oblique elastic cords being arranged radially inward of the carcass, extending continuously in the transverse direction of the tire over a width greater than the maximum width of the tread reinforcement, having its two edges located beyond the edges of said tread reinforcement, producing a complementary attenuation of the restraining force of the crown reinforcement, decreasing the curvature of the carcass reinforcement in the equatorial zone of the tire, and increasing this curvature in the region of the shoulders.
2.
A pneumatic tire according to claim 1, further comprising at least one additional ply of oblique elastic cords arranged radially inward of the carcass, extending in the transverse direction of the tire over a width greater than the maximum width of the tread reinforcement, and having its two edges located beyond the edges of said tread reinforcement, the first-named oblique elastic cords forming angles of at most 30