B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 9/18 (2006.01)
Patent
CA 2671330
The invention relates to a heavy goods vehicle tyre of the radial carcass construction, having an external radius R greater than 1000 mm, comprising a crown reinforcement radially interposed between the carcass reinforcement (5) and the tread (4) and said crown reinforcement consisting of at least one protective crown reinforcement (6, 7) radially adjacent to the tread. According to the invention, the tyre comprises a complex (8) consisting of at least one layer (11) of polymer compound of an axial width shorter than the width of the working crown reinforcement and of a thickness in excess of 16 mm, said complex (8) having a radial elastic modulus gradient, the lowest elastic modulus being higher than 15MPa.
L'invention concerne un pneumatique pour véhicule lourd à armature de carcasse radiale, présentant un rayon extérieur R supérieur à 1000 mm, comportant une armature sommet radialement intercalé entre l'armature de carcasse (5) et la bande de roulement (4) et ladite armature de sommet étant constituée d'au moins une armature de sommet de protection (6, 7) radialement adjacente à la bande de roulement. Selon l'invention, le pneumatique comporte un complexe (8) constituée d'au moins une couche de mélange polymérique (11) de largeur axiale inférieure à la largeur de l'armature de sommet de travail et d'épaisseur supérieure 16 mm, ledit complexe (8) présentant un gradient radial de module d'élasticité, le module d'élasticité le plus faible étant supérieur à 15MPa.
Michelin Recherche Et Technique S.a.
Robic
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