B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 9/20 (2006.01) B60C 9/09 (2006.01)
Patent
CA 2444954
The invention concerns a tyre for civil engineering machines comprising a radial carcass reinforcement (1) anchored in each bead to an annular bead-reinforcing element (2), and radially above a crown ply reinforcement (3) consisting of at least two working breaker strips (320, 321) of inextensible metallic cords cross-layed from one strip (320) to the next (321), said strips having widths not less than 50 % of the width L of the running tread (4) and, radially above of two protective breaker strips (330, 331) of so-called elastic metallic cords cross-layed from one strip (330) to the next (331), the running tread (4) comprising in its non-grooved part of thickness D at least an additional reinforcement (34) of reinforcing elements. The invention is characterised in that said additional reinforcement (4) consists of at least two layers (340, 341) of textile material monofilaments, mutually parallel in each layer, the axial lengths of said two layers (340, 341) being not less than the width of the narrower breaker strip (321).
Pneumatique pour engins de Génie Civil comprenant une armature de carcasse radiale (1) ancrée dans chaque bourrelet à un élément annulaire (2) de renforcement de bourrelet, et radialement au-dessus une armature de sommet (3) composée d'au moins deux nappes de sommet de travail (320, 321) de câbles métalliques inextensibles croisés d'une nappe (320) à la suivante (321), lesdites nappes ayant des largeurs au moins égales à 50% de la largeur L de bande de roulement (4) et, radicalement au-dessus de deux nappes de sommet de protection (330, 331) de câbles métalliques dits élastiques croisés d'une nappe (330) à la suivante (331), la bande de roulement (4) comportant dans sa partie non rainurée d'épaisseur D au moins une armature (34) d'éléments de renforcement, caractérisé en ce qui ladite armature (34) est composée d'au moins deux couches (340, 341) de monofilaments en matériau textile, parallèles entre eux dans chaque couche, les largeurs axiales desdites deux couches (340, 341) étant au moins égales à la largeur de la nappe de travil (321) la moins large.
Jallais Pierre
Ruffenach Jean-Marc
Michelin Recherche Et Technique S.a.
Robic
LandOfFree
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