Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Societe Detechnologie Michelin

Ludovic Greverie

Antonio Delfino

Salvatore Pagano

Bernard Villeneuve

Gael Roty

Nicolas Dautrey

Nanae Shimanaka

Jose Merino Lopez

Hideaki Takano

Masashi Igarashi

Masayuki Maesaka

Patrick Bervas

Damien Fombelle

Alain Parfondry

Gaël Roty

Jean-Claude-John Faure

Yasuhiko Futamura

Jean-Pierre Queslel

Yuji Kanno

A molding element for a mold for vulcanizing a tread of a tire, comprising a base able to mold part of the tread surface of the tread and a bar able to mold a groove in the tread, the bar comprising two lateral faces extending along its length and projecting from the base and an upper face connecting the lateral faces. The molding element comprises a contact edge formed by the base and the bar, intended to come into contact with another molding element to form all or part of the vulcanizing mold, and further comprising at least one recess in the bar, which opens onto one of the lateral faces and onto the contact edge, but does not open onto the upper face of the bar.

Mold comprising a cavity for molding a device for closure in a groove

A tread for a pneumatic tire in which air column resonance sound is reduced and wear of the groove fences and tread portion are caused to be approximately the same, while drainage performance is maintained, wherein a plurality of groove fences are formed and are installed within at least one circumferential groove, extending from the bottom of the circumferential groove, and block at least 70% of the cross-sectional area of the circumferential groove, and the bending parameter of the groove fences, defined as E&#xb7;I/(h3l) (where E is the modulus at 10% elongation of the material used for the groove fences, I is the second moment of area of the groove fence, h is the height of the groove fence, and l is the width of the groove fence) is at least equal to 250 Pa and at most equal to 350 Pa.

Pneumatic tire tread

Provided is a pneumatic tire capable of yielding excellent water-draining performance, while reducing air column resonance. This pneumatic tire () has a tread () and at least one ply () arranged toward the interior of the tread in the radial direction. The tread has at least one main channel () and a flexible fence () formed inside the main channel. The main channel has a bottom () and opposing first and second wall surfaces (). The flexible fence extends along the width of the main channel so as to block at least 70% of a cross sectional area of the main channel, and is arranged at intervals so that at least one is present in the main channel in the tread footprint when the tire rolls. A plurality of recesses having an opening that opens in the main channel are formed on the bottom, first wall surface and/or second wall surface of the main channel, the flexible fence being connected to the recess and extending into the main channel via the opening of the recess.

Pneumatic tire

Tire including a crown, sidewalls extending the crown on each side, these sidewalls being connected to beads intended to be in contact with a mounting rim on which the tire is mounted, this tire having an internal wall delimiting, with the mounting rim, an internal cavity to allow the tire to be inflated. This tire includes, over at least part of its internal wall delimiting the internal cavity, a plurality of protrusions of elongate shape forming a dense coating, this tire being characterized in that these protrusions of elongate shape include a plurality of supporting fibers and a plurality of branching fibers, the branching fibers being attached to the supporting fibers, each supporting fiber having two ends, of which at least one is attached to the internal wall of the tire.

Device inside a tire for reducing rolling noise

Tire comprising a tread having a tread surface () and comprising a plurality of grooves () of generally circumferential orientation and of depth H, these grooves () defining a plurality of rubber elements (), at least one of which comprises a plurality of cavities (), each cavity () of volume Vc of generally elongate shape with a total length Lc and being designed to communicate with a single groove () of generally circumferential orientation, each cavity () being extended all the way along its length Lc by an incision () which extends radially outwardly to emerge at the tread surface (), this tire being such that the incision () comprises an incision portion () beginning at the cavity and forming an angle A of at least 10&#xb0; with a line perpendicular to the tread surface and passing through the point of intersection of the incision with the cavity ().

Tire with tread having circumferential grooves, resonators and incisions

A treadhaving a tread surfaceonto which there opens at least one cavity, this cavity being bounded by a cavity wallcomprising a bottom wallextended by a side wallintersecting the tread surface to form at least one edge corner, this tread being, over at least part of the wall of the cavity, provided with a plurality of supporting strands, each supporting strandcomprising two ends of which one endis attached to the cavity wall, this tread being characterized in that the supporting strandseach comprise at least one branching formed by the attachment of at least one branching strand

Tread band with grooves provided with a noise-reducing device

Growing community of inventors

Ota, Japan

Ludovic Greverie