B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 9/22 (2006.01) B60C 9/20 (2006.01)
Patent
CA 2610765
The invention concerns a tyre (1) with radial carcass reinforcement (2) comprising a crown reinforcement (4) consisting of at least two working crown plies (41, 42) of inextensible reinforcing elements, crossed from one ply to the next forming with the circumferential direction angles ranging between 10° and 45°, itself radially capped with a running tread (5), at least one first extruded section (P) of rubber mixture separating two working layers, said extruded section (P) being radially separated from the liner (C) of the axially narrowest working ply by a second extruded section of rubber mixture (G), said first and second extruded sections of rubber mixture (P) and (G) and said liner (C) having respectively secant moduli of elasticity under tension at 10 % elongation MP, MG, MC such that MC >= MG and MG > MP, said tyre further comprising in each shoulder at least one layer (43) of circumferentially oriented reinforcing elements having a corrugation, and the axially inner end of said additional layer being radially adjacent the edge of at least one working crown ply.
Pneumatique (1) à armature de carcasse radiale (2) comprenant, une armature de sommet (4) formée d'au moins deux couches de sommet de travail (41, 42) d'éléments de renforcement inextensibles, croisés d'une nappe à l'autre en faisant avec la direction circonférentielle des angles compris entre 10~ et 45~, elle-même coiffée radialement d'une bande de roulement (5) au moins un premier profilé (P) de mélange caoutchouteux séparant deux couches travail, ledit profilé (P) étant radialement séparé du calandrage (C) de la couche de travail axialement plus étroite (42) par un second profilé de mélange caoutchouteux (G) lesdit profilés de mélange caoutchouteux (P) et (G) et ledit calandrage (C) ayant respectivement des modules sécants d'élasticité sous tension à 10 % d'allongement MP, MG, MC de sorte que MC >= MG > MP, ledit pneumatique comprenant additionnellement dans chaque épaule au moins une couche (43) d'éléments de renforcement, orientés circonférentiellement et présentant une ondulation, et l'extrémité axialement intérieure de ladite couche additionnelle étant radialement adjacente au bord d'au moins une couche de sommet de travail.
Michelin Recherche Et Technique S.a.
Robic
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