Improving the endurance of the beads (1) of a radial tire for a civil-engineering heavy vehicle by proposing a solution which blocks the propagation of the cracks initiated in the coating elastomer of the bead reinforcing layer (5), by inserting a cushion rubber (6) interposed between the coating elastomer of the carcass layer turn-up (312) and the coating elastomer of the bead reinforcing layer (5). The elastic modulus in extension of the cushion rubber (6) measured at 100% deformation must be less than the elastic modulus of the coating compound of the carcass layer. Still according to a disclosed embodiment, the thickness of the cushion rubber (6) is at least equal to the thickness of the bead reinforcing layer (5).
BOURRELET DE PNEUMATIQUE POUR VEHICULE LOURD DE TYPE GENIE CIVIL
BEAD FOR A TYRE FOR A CIVIL-ENGINEERING HEAVY VEHICLE
WULST FÜR EINEN REIFEN EINES HOCH- UND TIEFBAU-SCHWERLASTFAHRZEUGS
2022-05-25
Patent
Electronic Resource
French
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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