Tire bead core and filler construction

Details Tire bead core and filler construction Tire bead core and filler construction

B - Operations, Transporting

60

C

B60C 15/06 (2006.01) B29D 30/20 (2006.01) B60C 15/00 (2006.01) B60C 17/00 (2006.01) B60C 17/06 (2006.01)

Patent

CA 2294794

The run-flat tire (10) of this invention includes spaced apart bead areas (30) having a unique design to include first (34) and second (36) bead fillers adjacent a bead core (32). The second bead filler (36) is bounded by the first bead filler (34) and bead core (32). The method for manufacturing the tire to eliminate voids at the bead core (32) of the cured tire is also provided. The bead fillers are made to be resilient so that the tire can be easily mounted on a rim, particularly improving the ability to mount a run-flat tire (10) on a rim (80). The bead core (32) and fillers (34, 36) are designed for helping to sustain the run-flat tire (10) on the rim (80) with a loss of inflation pressure and to improve the running performance of the tire.

Le pneumatique à affaissement limité (10) de l'invention comprend des zones talon (30) espacées à configuration unique destinées à recevoir un premier (34) et un second (36) bourrages sur tringle adjacents à une tringle (32). Le second rembourrage sur tringle (36) est limité par la premier rembourrage de tringle (34) et la tringle (32). L'invention concerne également le procédé de fabrication du pneumatique visant à éliminer les vides au niveau de la tringle (32) du pneumatique vulcanisé. Les rembourrages de tringle sont fabriqués pour être élastiques de manière à pouvoir facilement monter le pneu sur une jante, ce qui facilite en particulier le montage d'un pneumatique à affaissement limité (10) sur une jante (80). La tringle (32) et les bourrages (34, 36) sont conçus pour participer au maintien du pneumatique à affaissement limité (10) sur la jante (80) en cas de perte de pression de gonflage, et pour améliorer les performances du pneumatique.

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