Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Matthieu Durat

Cyril Guichon

Daniel Fabing

Claude Audebert

Sébastien Fugier

Roger Delhommeau

Sebastien Fugier

Nenad Pesic

A tire () for driving on ice, comprising: a tread () having a rolling surface with a groove, a stud () with a part () thereof projecting from the rolling surface and having a minimum cross section Sm; a conduit (-) that forms, on the rolling surface of the tire, two opposing edges (), the conduit opening into the groove and/or onto a lateral face of the tread; wherein, for each stud, the sum of the mean cross sections Sn of the conduits, each mean cross section Sn being measured at right angles to one of the opposing edges formed by the conduit, is greater than or equal to half the minimum cross section Sm of that part of the stud that projects from the tread.

Tire for driving on ice

A tire () for driving on ice, comprising: a tread () having a rolling surface configured to come into contact with the ground when the tire is rolling along; at least one stud () having a longitudinal axis (A-A), a part of the stud projecting from the rolling surface, the intersection between the stud and the plane tangential to the portion of the rolling surface around the stud forming a contour C, that part of the stud that projects from the rolling surface having a minimum cross section Sm, Sm corresponding to the smallest cross section of the said part in any plane containing the radial direction that passes through the point of intersection between the longitudinal axis of the stud and the plane tangential to the portion of the rolling surface around the stud; at least one recess () in the tread forming, on the rolling surface, a contour G, the recess being associated with the stud in that the minimum distance D between the contours C and G is less than or equal to 1 cm; in which, for each stud, the sum of the volumes Vn of the recesses associated with the stud, expressed in mm, is greater than or equal to the product of the minimum cross section Sm of that part of the stud that projects from the tread, expressed in mm, multiplied by a length of 50 mm.

Motorcycle tire

Stud () for a tire (), the tire comprising a tread () made of rubber mix, the stud having an axis (A-A) and two axial ends and comprising: a first part () configured to come into contact with the ground when the stud is fitted to the tire and the tire is rolling along the ground, this first part being positioned at one of the axial ends of the stud; a head () configured to anchor the stud into the tread of the tire, the head being positioned at the other axial end of the stud; and a body () connecting the said first part and the head of the stud, the mean diameter of the body being smaller than the mean diameter of the head of the stud, these diameters being measured at right angles to the axis of the stud; in which the head comprises at least one recess () opening onto the surface of the head, the recess being configured to be filled with rubber mix of the tread so as to provide additional anchorage for the stud in the tread.

Tire stud provided with recesses configured to improve its retention in the tire

A tire () for driving on ice, comprising: a tread () having a rolling surface configured to come into contact with the ground when the tire is rolling along, and two lateral faces (), this tread comprising at least one groove () in the rolling surface; at least one stud () having a longitudinal axis (), a part () of the stud projecting from the rolling surface, the intersection between the stud and the plane tangential to the portion of the rolling surface around the stud forming a contour C, that part of the stud that projects from the rolling surface having a minimum cross section Sm, Sm corresponding to the smallest cross section of the said part in any plane containing the radial direction that passes through the point of intersection between the longitudinal axis of the stud and the plane tangential to the portion of the rolling surface around the stud; at least one conduit (-) that forms, on the rolling surface of the tire, at least two opposing edges (), the minimum distance D between the conduit and the contour C being less than or equal to 1 cm, the conduit opening into the groove and/or onto a lateral face of the tread; wherein, for each stud, the sum of the mean cross sections Sn of the conduits, each mean cross section Sn being measured at right angles to one of the opposing edges formed by the conduit, is greater than or equal to half the minimum cross section Sm of that part of the stud that projects from the tread.

Growing community of inventors

Clermont-Ferrand, France

Matthieu Durat