Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Compagnie Generale Des Establissements Michelin

Other

Michelin Recherche Et Technique

Michelin Recherche Et Techniques S.a.

Benjamin Quantinet

Philippe Gervais

Fabien Marlier

Stéphanie Cambon

Arnaud Larregain

Stéphane Oraison

Christophe Gayton

Fabien Chatignoux

Julien Metzger

Matthieu Vandaele

Jonathan Lejeune

Damien Bardin

Ralston Horace Moore

Maxime Rolland

Robert Ciprian Radulescu

Gilles Godeau

Tony Zivkovic

Didier Michel Martin

Xavier Neau

Eric Slachmuylders

Benoit Marie Foucher

Jean-Denis Hidrot

Eric A De Benedittis

Romain Berthier

Alexis Bournat

Pierre Tregouet

Claudia Navarro-Losada

Tire

The device for monitoring the wear of a tread during running comprises at least one internal cavity intended to form a void opening on to a tread surface after predefined partial wearing of the tread, this tread comprising a wear limit corresponding to a maximum thickness of wearable material, this device comprising a measurement well opening on to the tread surface, this measurement well having a bottom formed of a first part and of a second part which are offset from one another in the depth, these two parts of the bottom being situated at different distances with respect to the tread surface when new.

Tire wear monitoring device

Tire with radial carcass reinforcement having a tread of thickness E, this tread having a tread surface and at least one cut opening onto the tread surface to form edge corners. The cut extends into the tread over a total depth H. The cut is in the form of a sipe having a width D. There is also formed, in the vicinity, i.e. at a minimum distance from the said edge corner that is at most equal to five times the width D of the cut, of at least one edge corner of this cut and on the tread surface, at least one cavity having a depth h that is small in comparison with the depth of the cut, i.e. that is at most equal to 30% of the depth H. The at least one cavity reduces the compression rigidity of the tread in the vicinity of the the at least one edge corner.

Tread protection device

A tire with a radial carcass reinforcement, having a crown reinforcement, itself capped radially by a tread connected to two beads by two sidewalls, having at least two radially superposed layers of elastomeric compounds; a first layer, forming the radially outer part of the tread, has a first elastomeric compound having a modulus G* greater than 1.8 MPa, a second layer of elastomeric compounds radially on the inside of and in contact with the said first layer of elastomeric compound has at least three parts, the axially outer parts having a second elastomeric compound having a maximum value of tan (&#x3b4;), denoted tan (&#x3b4;) max, strictly less than 0.060, and at least a part of the second layer, axially in contact with at least an axially outer part having a third compound with modulus G* greater than 1.2 MPa and at least 5% less than the first elastomeric compound and a maximum value of tan (&#x3b4;), tan (&#x3b4;)max, between 0.060 and 0.120.

Tire comprising a tread made up of several elastomeric compounds

Tire with radial carcass reinforcement having a tread of thickness E, this tread having a tread surface to come into contact with a roadway and comprising at least one cut opening onto the tread surface to form edge corners, this cut extending into the tread over a total depth H at most equal to the thickness E of the tread, this cut being, between the tread surface and a depth Hat most equal to the total depth H, in the form of a sipe having a width D suitable for being able to close up at least in part under normal running conditions of the tire. There is also formed, in the vicinity, i.e. at a minimum distance from the said edge corner that is at most equal to five times the width D of the cut, of at least one edge corner of this cut and on the tread surface, at least one cavity having a depth h that is small in comparison with the depth of the cut, i.e. that is at most equal to 30% of the depth H, this at least one cavity reducing the compression rigidity of the tread in the vicinity of the said at least one edge corner.

Tire for a heavy goods vehicle, comprising a crown reinforcement, and, radially outside this crown reinforcement, a tread having a total thickness PMU of material intended to become worn during running, the crown reinforcement being formed by at least two working plies and a protection ply positioned radially outside the working plies and radially inside the tread, the narrowest working ply having a width in the range from 70% to 90% of the width W of the tread, the protection ply having a width at most equal to 70% of the width of the narrowest working ply, the tread comprising grooves only in the part radially outside the protection ply, each circumferentially orientated groove having a depth at least equal to 75% of the maximum thickness intended to become worn PMU. This tread comprises, axially between an axial end of the narrowest working ply and an axial end of the protection ply located on the same side of the equatorial plane, a channel that is generally circumferentially orientated and runs all the way around the tire, this channel being formed in such a way that the minimum distances between this channel and the working plies and between this channel and the protection ply are different from zero.

Combination of a heavy goods vehicle tire structure with a tread pattern

Tread having a maximum thickness PMU of material to be worn away during running, having: at least two grooves of circumferential overall orientation delimiting at least one intermediate row and two edge rows, a plurality of cuts of transverse overall orientation on each intermediate and edge row, representing, in the new state, a void of total volume Vco open onto the tread surface, at most equal to 13% of the total volume of the tread, channels or cavities extending under the tread surface in the new state, adapted to form new grooves after the tread has partially worn away, and having, in the initial state, a total volume Vcc at least equal to 30% of the total void volume Vco in the new state, intermediate rows of suffix (i) and edge rows of suffix (e) each provided with a plurality of cuts of transverse or oblique orientation distributed over each row evenly or near-evenly with a mean pitch of Pi and Pe respectively, having mean depths, Di and De respectively, which are at least equal to 20% of the thickness PMU and at most equal to thickness PMU, wherein:

Heavy goods vehicle driven axle tire tread

Tire for heavy goods vehicle having a tread comprising a plurality of circumferential grooves delimiting intermediate ribs and two edge ribs each circumferential groove comprising a plurality of protuberances formed as a protrusion on at least one lateral wall delimiting this groove, wherein:

Tread with reduced road noise

Tire tread () comprising a plurality of blocks (), each block () comprising a leading face (), a trailing face () and a contact face (), the leading face () making a mean angle &#x3b1;A greater than 0 degrees, the trailing edge () making a mean angle &#x3b1;F greater than 0 degrees, the angle &#x3b1;A of the leading face () being greater than the angle &#x3b1;F of the trailing face, each block () comprises an incision () extending into the thickness of the block, this incision () being delimited by opposing faces provided with blocking means () for blocking the relative movements of one of the said faces with respect to the other face in at least one direction, this incision () dividing the contact face () of the block into two parts with substantially equal surface areas, this tread being characterized in that the incision () is inclined by a mean angle &#x3b2;, measured with respect to the perpendicular to the contact face () in the same direction as the angle &#x3b1;A of the leading face and in that the volume of material contained between the leading face () and the incision () is less than the volume of material contained between the trailing face () and the same incision ().

Tire tread with blocks of at least one intermediate row having incision and blind longilinear cavity

Pneumatic tire

Tire tread

Tire tread for pneumatic tire

Growing community of inventors

Clermont-Ferrand, France

Benjamin Quantinet