Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Michelin Recherche Et Technique

Other

Compagnie Generale Des Establissements Michelin

Armines

Societe Detechnologie Michelin

Association Pour La Recherche Et Le Developpement Des Methodes Et Processus Industriels

Jose Merino Lopez

Olivier Muhlhoff

Emmanuel Custodero

Bozena Voge

Michel Ahouanto

Didier Vasseur

Frédéric Pialot

Luc Bestgen

Sébastien Rigo

Vincent Pelissier

Gael Roty

Olivia Cuscito

Damien Fombelle

José Carlos Araujo Da Silva

Bernard Villeneuve

Pierre Lesage

Jacky Pineau

Georges Peyron

Gael Pataut

Arthur Topin

Julien Matthieu Flament

Gilbert Menard

Christopher Careme

Jean-Claude Aperce

Jacques Fages

Marc Greiveldinger

Nathalie Coste

Ludovic Greverie

Julien Metzger

Serge Lefebvre

Vincent Lemal

Bertrand Garnier De Labareyre

Sylvain Petitjean

Martial Sauceau

Georges Lavialle

Pierrick Travert

Alain Faugeras

Jean-Jacques Letourneau

Jean-Pierre Queslel

Sylvain Petit Jean

Jean-Claude Kaczorwski

Simona Ceccia

A method for manufacturing a composite airtight layer () used in the composition of a tire () comprises: a film () made of thermoplastic material is heated such that the film is able to plastically deform; the film is deformed () with the aid of corrugating means, the thickness of the film () being in a range from 0.01 to 0.2 mm, and the film having corrugations with a pitch and amplitude chosen in a range from 0.1 to 10 mm so as to give the film a given elongation capacity; the film is cooled such that the corrugated film is no longer able to be plastically deformed; and the corrugated film is coated in a matrix () of elastomer material, so as to form a composite airtight layer ().

Method for manufacturing an airtight layer used in the composition of a tire

A tire comprises a sealing layer comprising a junction () extending in a main direction (D) forming, with the circumferential direction (Z) of the tire: in a portion (S) of the sealing layer extending axially in radial line with the working layer, an angle (ES) ranging, in absolute value, from 20° to 60°, and in a portion (F) of the sealing layer extending radially in each sidewall, an angle (EF), in absolute value, strictly greater than the angle (ES) of the main direction (D) of the junction () in the portion (S) of the sealing layer extending axially in radial line with the working layer.

Low-noise tire and method for manufacturing same

A non-pneumatic wheel () comprises a crown reinforcing region () itself radially on the inside of a tread (), the crown reinforcing region () comprising a plurality of reinforcing strips () arranged in at least three layers of strips () arranged in such a way that a virtual axis C-C substantially perpendicular to the strips intersects at least two strips in any axial position of the virtual axis in the crown reinforcing region.

Non-pneumatic wheel comprising a circumferential reinforcement structure

An assembly of a pneumatic tire and of a wheel, the pneumatic tire () being fitted to the wheel. The assembly comprises first and second self-sealing products housed in the internal volume (V) of the pneumatic tire (). The first self-sealing product, referred to as solid self-sealing product (OS), covers a predetermined part of the internal surface of the pneumatic tire (). The relative position of this predetermined part in the pneumatic tire () does not substantially vary under the effect of gravity. The second self-sealing product, referred to as liquid self-sealing product (OL), is in the liquid form.

Tire casing and wheel assembly comprising an enhanced self-sealing product

A curing bladder () for a tire has a shape of revolution about a central axis and a flexible wall made of crosslinked rubber, the external surface of which is intended to come into contact with the internal surface of a green tire during curing, the external surface having a relief structure having a plurality of air evacuation channels. The relief structure has first channels forming air evacuation grooves () arranged at a distance of between 2 and 5 mm, and having a depth of between 0.4 and 1 mm, two adjacent grooves defining, between one another, an inter-groove zone () having second channels forming air channelling furrows () made so as to communicate with one another and with at least one of the grooves (), the furrows each having a depth of between 0.01 and 0.4 mm and being situated at a distance of between 0.2 and 1 mm from one another.

Curing membrane for a tire

A method of retreading a tire casing includes the step of disposing a cured rubber tread on a carcass with a layer of hot-melt material interposed between the tread and the carcass. The method continues with the step of rollering the tread by means of at least one roller with a width (r) that is less than a width (b) of the tread.

Method for retreading a tire casing using a roller

A process for manufacturing rubber crumb comprises the following steps: (a) suspending rubber granules having a given size in an autoclave () containing a supercritical fluid; (b) agitating the mixture for a predetermined time at constant pressure and constant temperature; (c) carrying out an isenthalpic expansion of the mixture from step (b) by spraying it through a nozzle ().

Method for producing rubber crumb, and rubber crumb

A running set comprising: a tire () comprising two beads (); a mounting rim () of which the width is greater than or equal to 55% and less than or equal to 80% of the maximum axial width of the tire inflated to its service pressure; and at least one adapter () which provides the connection between the mounting rim and a bead of the tire.

Running assembly

A tire has a form of a torus that is open radially on an inside portion. The tire includes inner and outer walls, a crown, two sidewalls, two beads, a crown reinforcement, and a carcass reinforcement anchored in the beads and extending at least from the beads as far as the crown. The inner wall is covered at least in part with an airtight layer, and the airtight layer is covered at least in part with a layer of a self-sealing product. Each of the beads includes an annular reinforcing structure, with each annular reinforcing structure being formed of a plurality of windings of a single metal thread. The windings are arranged in a plurality of radially superposed layers, with each layer having a group of the windings arranged axially in a side by side manner, such that the superposed layers have a hexagonal cross section.

Tire with specified bead structure and self-sealing product and wheel assembly with same

Process for the manufacture of an elastomer composition having a self-sealing property which is based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a solid unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler; between 0.5 and 15 phr of thiuram polysulphide, in which, during a first stage or stage (a), a masterbatch comprising at least the solid unsaturated diene elastomer and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a 'hot compounding' temperature or up to a 'hot compounding' temperature which is greater than the softening temperature of the hydrocarbon resin.

Method for manufacturing an elastomeric composition having a self-sealing property

The tire (B) comprises a tread () including a running layer () which is intended to come into contact with the ground when the tire (B) rolls on the ground, and a sublayer () located radially inwards from the running layer (). The tread () comprises at least one fluid passage () between the sublayer () and the air surrounding the tire (B). The sublayer () comprises a cellular material. The fluid passage () comprises an element chosen from a groove () and a cut (), formed in the running layer () and extended by at least one well () acting as a radial extension of the element, formed between the groove () and/or the cut () and the sublayer (). Each well () forms a localized part of the fluid passage ().

Tire and mold comprising a fluidic passage

A method for testing a punctured tyre's resistance to a loss in pressure includes: creating a plurality of punctures in a wall of the tyre by inserting a plurality of puncturing objects through the wall; running the tyre with the puncturing objects in the wall thereof over a given distance with a regulated inflation pressure; stopping the running of the tyre; and determining, for each puncture, a pressure loss resistance index based on an estimate of a leak rate of the puncture.

Method for testing the resistance of a tyre to pressure loss

Self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; and 0 to less than 30 phr of a filler. Also disclosed is an article such as a tire provided with a puncture-resistant layer comprising the self-sealing elastomer composition. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the inflatable article, a puncture-resistant airtight laminate.

Self-sealing composition for an inflatable article

A layer of cellular material forms a running layer (A) of a tread () in which tread pattern elements () are made. In order to form the cellular material, an uncured blank is provided with a mass of material comprising p,p'-oxybis(benzenesulphonyl hydrazide) that forms a pore-forming agent. The uncured blank is placed in a vulcanization mold () comprising molding elements (). At least 95% of the molding elements () each satisfy the following two conditions:

Method for producing tire having tread with foamed material and hollow tread pattern elements

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

Growing community of inventors

Riom, France

Jose Merino Lopez