Patent ID: 6263934
Filing Date: 2001-07-24
Classification: B60C,Y10S

Abstract:
A tire tread having a rolling surface and comprising a plurality of incisions opening onto said surface, each incision being defined by a space bounded chiefly between two principal walls facing each other, said walls being perpendicular or oblique with respect to the rolling surface, at least one rubber stud of mean axis XX' bounded by at least one incision, said stud being defined by a side wall encircling said stud around XX' and being bounded by an outer wall of the stud, visible from the outside of said tread, said side wall being isolated from the tread except for at least one rubber connecting element, each connecting element of each rubber stud having, with the side wall of said rubber stud, a surface of intersection bounded by two principal geometrical lines, the tread being characterized in that:the projected length, onto the rolling surface of the tread in new condition and in the direction XX', of the principal geometrical lines of the surfaces of intersection of all the connecting elements of one and the same rubber stud, represents at least 80 percent of the perimeter of the contour of each rubber stud, measured on the same surface;the sum of the lengths of the intersections with any surface substantially parallel to the rolling surface of the tread in new condition and located inside of said tread, of the surfaces of intersection of all the connecting elements of one and the same rubber stud, represents at most 50 percent of the contour perimeter of said rubber stud, measured on the same surface.