Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Michelin Recherche Et Techniques S.a.

Compagnie Generale Des Etablissements Michelin

Julien Metzger

Benjamin Quantinet

Fabien Chatignoux

Jose Merino Lopez

Sébastien Noel

Pneumatic tire

Tire tread for pneumatic tire

Tire tread including a pattern formed by at two ridges of mean width L, which include a plurality of incisions whose traces on the contact surface extend between two points of intersection A and B, the segment AB making an angle with the transverse direction of the tread at most equal to 40&#xb0;, the tread wherein each incision, of mean width E, includes a succession of incision portions, some of said incision portions having, on any surface parallel to the contact surface in the new condition and located between said surface in the new condition and &#x2154; of the maximum depth of the incision, traces that make an average angle &#x3b2; at most equal to 15&#xb0; with the longitudinal direction of the tread, said portions having a total length Lt which is at least equal to one-fifth of the ridge width; and in that the incision portions whose traces make an average angle &#x3b2; are provided on their opposite walls with relief elements of amplitude K designed to cooperate with one another to block relative movements between one incision wall and the opposite wall, the amplitude K of said relief elements being between 4 and 10 times the mean width E of the incision.

Tire tread provided with incisions

A tread of thickness E, intended to be used in a tire having a carcass reinforcement surmounted by a crown reinforcement and including on its outer surface a plurality of grooves of depth h, including at least circumferential grooves separated axially by ribs, is provided with at least one internal, circumferential anti-rubber-on-rubber connection element, the outer wall of which, viewed in meridian section, has in part a contour identical to the contour of the wall of the regrooving groove to be created, the point(s) of said wall which are farthest from the axis of rotation being radially distant from the tread surface by a quantity hless than the depth h of the grooves, and the point(s) of said wall closest to the axis of rotation being radially distant from the tread surface by the maximum regrooving height H.

Regroovable tread and processes for obtaining such

Growing community of inventors

Clermont-Ferrand, France

Julien Metzger