Patent ID: 8439092
Filing Date: 2013-05-14
Classification: B60C

Abstract:
1. Tire tread provided with a plurality of grooves delimiting blocks and/or ribs, these grooves having an average depth H, this tread having a radially exterior surface, part of which forms a tread surface designed to come into contact with the roadway during rolling, this tread surface comprising a plurality of first raised contact lines and a plurality of second raised contact lines, the first raised contact lines being geometric lines or edges directed substantially in a first direction, the second raised contact lines being geometric lines or edges directed substantially in a different, second direction, the first raised contact lines intersecting the second raised contact lines to delimit, on the tread surface, a plurality of contiguous first cavities each delimited in the thickness of the tread by a main wall, all the points of the main wall, except for the points of the raised contact lines, being situated radially inwardly of the tread surface, wherein during running of the tire in the as-new state, the radially exterior surface of the tread is first in contact with the roadway only along the plurality of raised contact lines, this tread further comprising a plurality of second cavities each delimited by a secondary wall opening onto said main wall of a respective first cavity.