Tyre for heavy vehicle

Details Tyre for heavy vehicle Tyre for heavy vehicle

B - Operations, Transporting

60

C

B60C 9/20 (2006.01)

Patent

CA 2361904

The invention concerns a tyre for a heavy vehicle, comprising at least a casing reinforcement (1), whereon is mounted radially external a crown reinforcement (3) consisting of at least three plies (31, 32, 33) called working plies and formed with inextensible wire cords, crisscrossed from one ply (31, 32) to the next (32, 33) forming with the circumferential direction angles alpha , alpha 1, alpha 2 ranging between 15 DEG and 35 DEG . At least a half-ply (34) consisting of inextensible wire cords and having a length L', is, on either side of the equatorial plane XX', arranged between the edges of at least two radially adjacent working plies (31, 32; 32, 33), the cords of said half-ply (34) forming with the circumferential direction an angle beta greater in absolute value than 25 DEG and greater in absolute value than the widest angle formed by the elements of the two working plies by a quantity ranging between 5 DEG and 15 DEG .

Pneumatique pour engin lourd, comprenant au moins une armature de carcasse radiale (1), surmontée radialement à l'extérieur par une armature de sommet (3) composée d'au moins trois nappes (31, 32, 33) dites de travail et formées de câbles métalliques inextensibles, croisés d'une nappe (31, 32) à la suivante (32, 33) en faisant avec la direction circonférentielle des angles .alpha., .alpha.1, .alpha.2 compris entre 15° et 35°. Au moins une demi-nappe (34), composée de câbles métalliques inextensibles et de largeur L', est, de chaque côté du plan équatorial XX', disposée entre les bords d'au moins deux nappes de travail (31, 32; 32, 33) radialement adjacentes, les câbles de ladite demi-nappe (34) faisant avec la direction circonférentielle un angle .beta., d'une part supérieur en valeur absolue à 25°, et d'autre part supérieur en valeur absolue au plus grand angle que font les éléments des deux nappes de travail d'une quantité comprise entre 5° et 15°.

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