Tire having sacrificial bridging

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 11/03 (2006.01) B60C 11/11 (2006.01) B60C 11/12 (2006.01) B60C 11/13 (2006.01)

Patent

CA 2300989

The present invention provides a pneumatic tire having a tread portion comprising a plurality of axially spaced apart essentially longitudinal grooves separating essentially longitudinal ribs. On at least one of said ribs, transverse grooves or cuts repeat in the circumferential direction to form first and second land portions wherein the first land portions comprise blocks having a circumferential length greater than that of the second land portions. Said second land portion acts as a sacrificial bridge which provides traction improvement and minimizes undesirable surface anomalies during the service life of the tire.

La présente invention concerne un pneumatique qui présente une partie bande de roulement comprenant plusieurs rainures essentiellement longitudinales espacées de manière axiale, ces rainures étant destinées à séparer des nervures essentiellement longitudinales. Des rainures ou des coupures transversales sont ménagées sur au moins une de ces nervures dans le sens circonférentiel, de manière à former une première et une seconde plages en relief, la première plage en relief comprenant des blocs dont la longueur circonférentielle est supérieure à celle de la seconde plage en relief. Celle-ci sert par ailleurs de pont sacrificiel afin d'améliorer la traction et à minimiser les défauts superficiels indésirables pendant la durée de vie dudit pneu.

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