An inextensible high temperature resistant runflat tire

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 17/00 (2006.01) B60C 9/04 (2006.01) B60C 9/14 (2006.01) B60C 9/18 (2006.01) B60C 15/00 (2006.01) B60C 15/06 (2006.01)

Patent

CA 2291136

A runflat radial ply passenger or light truck pneumatic tire (10) having a carcass (30) reinforced with at least one sidewall insert or filler (42) and one substantially inextensible cord reinforced ply (38), the ply being wrapped about two bead cores (26) and located radially inward of a belt reinforcing structure (36). The sidewall insert or filler (42) is located radially inward of the ply (38). The cord (43) has a minimum modulus E of 10 Gpa and is generally inextensible and less heat sensitive than conventional synthetic cords used in passenger and light truck tires. In one embodiment the ply cords (43) are aramid, in another embodiment the cords (43) are steel.

L'invention porte sur un pneumatique (10) pouvant rouler dégonflé pour automobiles ou camionnettes présentant: une carcasse renforcée (30) par au moins un élément (42) de remplissage ou d'insertion placé dans les flancs, et au moins un pli (38) renforcé par un câble, enroulé autour de deux corps de talon (26) et situé radialement à l'intérieur d'une structure de renfort (36) de la ceinture. L'élément d'insertion ou de remplissage (42) se situe radialement à l'intérieur du pli (38). Le câble (43), d'un module E minimal de 10 Gpa, est pratiquement inextensible, et moins sensible à la chaleur que câbles synthétiques des pneus classiques pour automobiles et camionnettes. Dans l'une des exécutions, les câbles (43) des plis sont en aramide, et dans une autre, en acier.

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