Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Establissements Michelin

Compagnie Generale Des Etablissements

Societe Detechnologie Michelin

Stéphanie Cambon

Jonathan Lejeune

Damien Bardin

Frederic Honnorat

Olivier Muhlhoff

Didier Vasseur

Arnaud Larregain

José Carlos Araujo Da Silva

Benjamin Quantinet

Fabien Marlier

Hélène Emorine

Karine Longchambon

Damien Thomasson

Laure Belin

Richard Audigier

William License

Jean-Denis Hidrot

Guy Cagneaux

Julien Metzeger

A tire comprises a crown zone comprising a crown reinforcement surmounted radially on the outside by a tread formed from at least one material that is not a conductor of electricity, the crown reinforcement comprising a plurality of layers superposed on one another, each layer of the crown reinforcement comprising two ends in the circumferential direction, these two ends being joined together in an abutment region, the tread comprising a weld region circumferentially offset by an angle of 180 degrees with respect to the region at which the radially outermost layer of the crown reinforcement is superposed. The tire comprises at least one conducting strip positioned between the tread and the crown reinforcement and located circumferentially as to be positioned at equal angular distances between the tread weld region and the region at which the radially outermost reinforcing layer is butted together, these two regions being diametrically opposite.

Tire made conductive by arranging a localized conductive strip

A tire comprising a tread, this tread comprising at least one channel and at least one wear indicator that is disposed on the bottom of the channel. The wear indicator has a contact face which is intended to come into contact with a road surface when the tire reaches a wear limit. The contact face has a texture that contrasts with the bottom of the channel.

Tread with concealed cavities comprising a wear indicator having improved visibility

A tire () comprising a tread (), this tread comprising at least one channel (), at least one wear indicator () disposed on the bottom of the channel (), the wear indicator comprising a contact face () intended to come into contact with a road surface when the tire reaches a wear limit, the channel () comprising a texture () surrounding the wear indicator () and contrasting with the contact face () of the wear indicator.

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

The tread includes over at least a first axial part (M) at least one wavy groove in a first direction and wavy grooves in a second direction. The wavy grooves in the second direction are connected to the wavy groove in the first direction. Over at least a second axial part (B) of the tread, at least one wavy groove continuous in a third direction, and wavy grooves continue in a fourth direction. The wavy grooves in the fourth direction are connected to the wavy groove in the third direction. When new, the open parts of the first axial part (M) are connected to one another, and the open parts of the second axial part (B) are not connected with one another. Beyond a part-wear condition, the open parts of the second axial part (B) are connected to one another, and the open parts of the first axial part (M) are not connected with one another.

Evolving tread for a tire

A tire made of rubber material, comprising a tread (), said tread () having a plurality of grooves (), each groove () having a groove bottom, walls flanking the groove bottom and transition regions between the walls and the groove bottom. The tire is characterized in that all or some of the grooves () comprise a texture () extending only over the groove bottom and over at least a part of the transition regions associated with this groove bottom, said texture () contrasting with the rest of the tire ().

Tire including a high-contrast texture in a groove

A tread for a heavy vehicle tire of total thickness PMU this tread when new having a tread surface is provided and disclosed herein. The tread includes at least one cut opening in the initial condition onto the tread surface, this cut being such that it includes an external part having the form of a groove in the main direction, this groove having a mean depth Pe less than 80% of the thickness PMU, an internal part forming the bottom of the cut, this internal part having the shape of a channel of mean width Le and mean height He, this channel being intended to form a new continuous groove when the part wear of the tread reaches at most 80% of the thickness PMU.

The invention relates to a rubber composition based on one or more specific functionalized diene elastomers and on one or more carbon blacks with a CTAB specific surface varying from 100 to 200 m/g, the functionalized diene elastomer or elastomers being composed of a specific diene elastomer functionalized, at the chain end or in the middle of the chain, by a tin functional group and of a content of less than 15% by weight, with respect to the total weight of the functionalized diene elastomer, of a non-tin functional elastomer. The diene elastomer exhibits a monomodal distribution of molecular weights before functionalization and a polydispersity index before functionalization of less than or equal to 1.3. This composition makes it possible to obtain tires having an improved wear resistance and which are characterized by decrease in rolling resistance, without damaging the processing and the wet grip.

Composition containing a particular diene elastomer and a carbon black having a particular specific surface area

Tread for a tire for a heavy goods vehicle of total thickness E and of total volume V, having at least one continuous groove comprising: at least two wearing layers in the thickness of the tread, each having a thickness at most equal to 75% of the total thickness E of the tread, a plurality of external cavities and a plurality of internal cavities positioned radially and entirely on the inside of the tread surface in the new state, each internal cavity being connected to an external cavity by a connecting channel, and having a total voids volume Vc at least equal to 7% and at most equal to 12% of a volume equal to the sum of the total volume V and of the total voids volume, and having an effective voids volume Ve for each wearing layer less than the total voids volume Vc, and satisfying the equation: 0.4 St&#x3c;Ve&#x3c;0.8 St, wherein 0.4 and 0.8 are heights in millimeters and St is the surface delimited by the external contour of the contact patch under static conditions under service load and pressure, and at least the first wearing layer I is made up of a rubber compound based on at least one material having a dynamic Tg higher than &#x2212;40&#xb0; C. and predominantly containing a SBR copolymer of Tg&#x3e;&#x2212;65&#xb0; C.

Tread for heavy goods vehicle tire

Tire tread

The invention relates to a rubber composition devoid of or practically devoid of zinc or zinc derivative, usable in particular for the manufacture of tires or tire treads, comprising at least: in which:

Growing community of inventors

Clermont-Ferrand, France

Stéphanie Cambon