Carcass reinforcement for airplane tyre

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 15/00 (2006.01)

Patent

CA 2712250

The invention relates to an airplane tyre in which the carcass reinforcement includes at least one inner layer (11, 12) wound around the bead wires (15) from the inside towards the outside for forming a ply turn-up, and at least one outer layer (13, 14) axially outside in the flange (18) relative to any inner layer, wherein the inner layer axially closest to the bead wires is uncoupled, on at least a portion of the length thereof in an area adjacent and radially outside of the bead wires, ply turn-ups and carcass reinforcement layers that are axially outside thereto, by at least one polymer mixture for filling the bead (16) having a radially outermost point C called coupling point. According to the invention, the end of at least one ply turn-up is radially inside of the coupling point, and at least one ply turn-up, having an end radially inside of the coupling point, is uncoupled, on at least a portion of the length thereof and at least on the axially outer face thereof, from any other carcass frame layer or any other ply turn-up by at least one polymer mixture for filling the bead.

L'invention concerne un pneumatique d'avion, dont l'armature de carcasse, comprend au moins une couche interne (11,12), enroulée autour de la tringle (15) de l'intérieur vers l'extérieur pour former un retournement, et au moins une couche externe (13,14), axialement extérieure dans le flanc (18) à toute couche interne, la couche interne, axialement la plus proche de la tringle, étant découplée sur au moins une partie de sa longueur, dans la zone adjacente et radialement extérieure à la tringle, des retournements et des couches d'armature de carcasse qui lui sont axialement extérieurs, par au moins un mélange polymérique de remplissage de bourrelet (16), dont le point radialement le plus extérieur C est appelé point de couplage. Selon l'invention, l'extrémité d'au moins un retournement est radialement intérieure au point de couplage, et au moins un retournement, d'extrémité radialement intérieure au point de couplage, est découplé, sur au moins une partie de sa longueur et sur au moins sa face axialement extérieure, de toute autre couche d'armature de carcasse ou de tout autre retournement, par au moins un mélange polymérique de remplissage de bourrelet.

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