Pneumatic tire with sidewall projections

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 11/01 (2006.01)

Patent

CA 2458858

A pneumatic tire has an aggressive tread pattern for use on both on-road and off-road vehicles having at least a pair of intermediate ribs and a pair of shoulder ribs providing the ground engaging tread lugs. A plurality of circumferentially extending lug groups are formed on and extend outwardly form and along the sidewalls of the tire. Each lug group preferably includes three separate lugs, each lug having a substantially flat oute surface lying in a different plane than the outer surfaces of the other two lugs. Two of the lugs are radially aligned with each other along the sidewall of the tire with the third lug lying intermediate spaced pairs of these aligned lugs. The lugs are formed with sharp corners offset from each other which extend outwardly from the sidewall to different levels. A top surface of one of the lugs aligns with the ground engaging surface of an adjacent shoulder rib tread lug and the top surface of the intermediate lug aligns with the inner tread surface of the road engaging tread pattern.

L'invention concerne un pneumatique à profil de bande de roulement agressif destiné aux véhicules de type classique et tout terrain, qui comporte au moins une paire de côtes centrales et une autre paire de côtes en épaulement formant autant de sculptures adhérant au sol. Plusieurs groupes de côtes latérales, sur le pourtour de la paroi latérale du pneumatique, forment des sculptures le long de ladite paroi. De préférence, chaque groupe comprend trois côtes distinctes, et chacune de ces côtes a une surface extérieure sensiblement plate qui se situe dans un plan différent du plan de la surface extérieure des deux autres côtes. Deux des côtes latérales considérées sont alignées mutuellement en configuration radiale le long de la paroi latérale du pneumatique, la troisième côte latérale occupant une position intermédiaire entre les deux premières. Par ailleurs, les côtes forment des coins prononcés, mutuellement décalés, en relief sur la paroi latérale, à différents niveaux. La surface supérieure de l'une des côtes latérales est alignée avec la surface de contact au sol d'une côte d'épaulement adjacente, d'une part, et la surface de la côte latérale intermédiaire est alignée avec la surface interne du profil de la bande de roulement.

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