B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 9/20 (2006.01)
Patent
CA 2728043
The invention relates to an airplane tire, the nominal pressure of which is greater than 9 bars and the sag of which, under a nominal load, is greater than 30%, including a tread having: a rolling surface (41); a crown reinforcement (42), including at least one layer of reinforcing elements; and a carcass reinforcement (43) including at least one layer of reinforcing elements, said rolling surface (41), crown reinforcement (42), and carcass reinforcement (43) being geometrically defined, respectively, by initial meridian profiles. According to the invention, the initial meridian profile of the crown reinforcement (42) is locally concave on a medial portion having an axial width I42 at least equal to 0.25 times the axial width L42 of the crown reinforcement.
L'invention concerne un pneumatique d'avion, dont la pression nominale est supérieure à 9 bars et la flèche sous charge nominale supérieure à 30%, comprenant une bande de roulement ayant une surface de roulement (41), une armature de sommet (42), comprenant au moins une couche d'éléments de renforcement, une armature de carcasse (43) comprenant au moins une couche d'éléments de renforcement, lesdites surface de roulement (41), armature de sommet (42) et armature de carcasse (43) étant respectivement définies géométriquement par des profils méridiens initiaux. Selon l'invention, le profil méridien initial de l'armature de sommet (42) est localement concave sur une partie médiane de largeur axiale I42 au moins égale à 0,25 fois la largeur axiale L42 de l'armature de sommet.
Chambriard Francois
Moranne-Beaufils Sophie
Michelin Recherche Et Technique S.a.
Robic
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