B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 17/04 (2006.01) B60C 1/00 (2006.01) B60C 17/06 (2006.01)
Patent
CA 2448773
A support (1) according to the invention comprises a rubber article. The support comprises: a substantially cylindrical base (2) which conforms to the wheel rim; a substantially cylindrical crown (3) which comes into contact with the inside of the tire summit in the event of a drop in inflation pressure, but to leave a clearance relative to the summit at nominal inflation pressure, and an annular body (4) connecting the base to the crown. The rubber article comprises a rubber, preferably a mix of natural rubber and polybutadiene, a metal salt of a carboxylic acid, preferably zinc dimethacrylate, and effective amount of carbon black or silica, or both, and a peroxide for curing of said support. The support of the present invention provides weight reduction, reduced hysteresis, enhanced thermal stability, and enhanced thermo-oxidative stability, therefore providing longer service life.
L'invention porte sur un support (1) comprenant un article en caoutchouc. Le support comprend: une base quasi cylindrique (2) qui épouse la forme de la jante; une couronne quasi cylindrique (3) qui vient en contact avec l'intérieur du sommet du pneu lors d'une chute de pression, mais laisse un espace mort entre le sommet à une pression de gonflage nominale, et un corps annulaire (4) raccordant la base à la couronne. L'article en caoutchouc comprend un caoutchouc, de préférence un mélange de caoutchouc naturel et de polybutadiène, un sel métallique d'un acide carboxylique, de préférence un diméthacrylate de zinc et une quantité efficace de noir de carbone ou de silice, ou le deux, et un peroxyde pour durcir le support. Le support de cette invention permet de réduire le poids et l'hystérésis, de renforcer la stabilité thermique ainsi que la stabilité thermo-oxydante, prolongeant ainsi la durée de vie du pneu.
Michelin Recherche Et Technique S.a.
Robic
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