Michelin Recherche Et Technique S.a.

Compagnie Générale Des Etablissements Michelin-Michelin & Cie

Other

Compagnie Generale Des Establissements Michelin - Michelin & Cie

Pascal Auxerre

Jos&eacute; Merino Lopez

David Jardine

Bertrand Garnier De Labareyre

Georges Lavialle

Pascal Falempin

Jean Claude Kaczorwski

Interface disc for a vehicle wheel, comprising:

Interface disc for a vehicle wheel

Tire, comprising at least one carcass-type reinforcement structure extending circumferentially from the bead to the sidewall and a crown reinforcement, each of the beads further comprising a main anchoring zone for supporting the reinforcement structure, the tire comprising a rim protector provided by a rubber projection extending axially outwardly relative to the sidewall and comprising at least one secondary anchoring zone comprising a plurality of circumferential cord windings, the windings cooperating with an adjacent portion of a secondary reinforcement structure via a rubber anchoring mix. Since anchoring is distributed between the bead and the rim protector, new architectural or design possibilities are opened up, for example permitting the use of the restricted space of the bead in an optimum manner. Thus, for example, the presence of the secondary anchoring zone at the rim protector helps greatly to improve the behavior of the tires, in particular resistance to drift.

Tire with dual anchorage carcass ply

A tire comprising at least one reinforcement structure of carcass type anchored on each side of the tire in a bead, a crown reinforcement, sidewalls meeting up radially towards the outside with a tread, the carcass-type reinforcement structure extending circumferentially from the bead towards said sidewall and being discontinuous over at least a portion of the crown of the tire, said crown reinforcement comprising on the one hand at least one primary reinforcement structure covering substantially the entire width of the crown and on the other hand at least one series of circumferential reinforcements also covering substantially the entire width of the crown, said series of circumferential reinforcements comprising a portion of lateral circumferential reinforcements disposed radially to the outside relative to said primary reinforcement structures and a portion of median circumferential reinforcements disposed radially to the inside relative to said primary reinforcement structures.

Tire with double half-carcasses and adapted crown zone

A tire comprising at least one reinforcement structure of carcass type anchored on each side of the tire in a bead, a crown reinforcement, each bead being extended radially towards the outside by a sidewall, said reinforcement structure being discontinuous over at least a portion of the crown of the tire, said crown reinforcement comprising on the one hand at least one primary reinforcement structure covering substantially the entire width of the crown and comprising on the one hand, on each side of the tire, a lateral primary reinforcement structure portion disposed radially outside the adjacent carcass-type reinforcement structure portion and on the other hand a median primary reinforcement structure portion disposed radially more to the inside than the lateral primary reinforcement structure portions and at least one substantially axial row of median circumferential reinforcements disposed radially to the outside, substantially adjacent the median primary reinforcement structure portion.

Tire with double half-carcasses and low-profile crown reinforcements

A tire for heavy loads, having an inextensible radial carcass ply anchored to a bead wire to form an upturn, the end of which is located at a radial distance from the base of the bead. Each bead is reinforced by at least two additional reinforcement armatures, one armature formed of radial inextensible metallic reinforcement elements and a second armature formed of metallic elements forming an angle with the circumferential direction, the first armature being formed of at least one ply wound around the anchoring bead wire on the inside of the carcass reinforcement to form two strands, such that the axially inner strand, between the radially lower end of its radially upper edge parallel to the meridian profile of the carcass reinforcement and its point of tangency with the anchoring bead wire, follows a rectilinear trace referred to as &ldquo;shortest-path&rdquo;.

Reinforced bead for a radial tire

A tire having a radial carcass reinforcement, anchored in each bead to an anchoring bead wire to form an upturn, characterized in that a profiled member of vulcanized rubber mix is arranged axially to the outside of the upturn of the carcass reinforcement, the secant modulus of elasticity in tension of which, measured for a relative elongation of 10%, is very much greater than the moduli of the other mixes forming the bead, the main part of the carcass reinforcement having a substantially rectilinear meridian profile between its point of tangency to the anchoring bead wire and a point A located at a radial distance H from the base D of the beads of between 35% and 65% of the radial distance H between the points of maximum axial width of the carcass reinforcement and said base D.

Bead for a radial tire

A tire with a form ratio H/S between 0.3 and 0.8 has a carcass reinforcement ( ) which is covered radially by a quasi-cylindrical crown reinforcement ( ) and which is tangential at T to a holding circle C. The common tangent at T to the circle C and to the meridian profile of the carcass ( ) makes an angle &agr; of between &plus;20&deg; and &minus;80&deg; with respect to a line parallel to the rotation axis and passing through the tangency point T. In its portion located between the tangency point T and the point E of greatest axial width, the carcass reinforcement ( ) is provided with a reinforcement armature ( ) of circumferentially non-extensible elements. Viewed in meridian cross-section and when the tire is fitted and inflated to the recommended pressure, the carcass ( ) has a meridian profile consisting of four circular arcs configured to improve the endurance of the tire while improving its rolling resistance.

Tire with specified crown reinforcement and carcass profile

A tire, at least one radial carcass reinforcement of which is anchored within each bead B to two bead wires and to form an upturn, characterized in that, viewed in meridian section, an additional reinforcement armature, formed of at least one ply of circumferential reinforcement elements, is placed, at least axially to the inside, along the carcass reinforcement in the region of the bead B.

Tire with at least two anchoring bead wires and at least one ply of circumferential reinforcement elements in each bead

A tire, at least one radial carcass reinforcement of which is anchored within each bean B to a bead wire to form an upturn, characterized in that, viewed in meridian section, the carcass reinforcement has a meridian profile, in the region of the point of inflection J between the convex part and the concave part, which is reinforced axially to the inside by an additional reinforcement armature composed of at least one ply formed of circumferential metal elements.

Tire with lengths or assemblies of lengths of circumferential bead reinforcement elements

A molding element has an anchoring portion and a molding portion, the anchoring portion being intended to be anchored in a part of a tire tread mold with the molding portion projecting from a molding face of the tire tread mold part. The molding portion of the molding element has at least two extensions, one of these extensions having at least one arm pivotally mounted on the extension. The molding element is characterized in that, in the molding position, at least one arm pivotally mounted on an extension bears on another extension of the same molding element to define at least one orifice passing through the molding element to mold a connecting bridge between opposite walls of a cutout molded by the molding element.

Molding element and mold for molding a cutout in a tread

A tire has at least one radial carcass reinforcement anchored within each bead B to at least one bead wire to form an upturn, wherein the carcass reinforcement meridian profile trace between a point A of greatest axial width and a point of tangency T with the circle circumscribed on the coating layer of the anchoring bead wire is convex over its entire length, and the thickness &egr; of the bead B, measured on a line perpendicular to the meridian profile at a point C of height h of between 30 and 40 mm and measured to the base YY&prime;, is between 2.5 and 3.0 times the thickness e of the sidewall measured on a straight line D&Prime; of greatest axial width, an additional reinforcement armature of at least one ply of circumferential reinforcement elements being arranged axially to the inside of the carcass reinforcement non-upturned part.

Tire bead with circumferential reinforcement elements

A tread is provided with at least one rubber stud of orientation XX&prime; perpendicular or inclined with respect to the tread surface. The rubber stud has a side wall bounded by at least one incision and an outer end wall. The stud is joined to the tread at its base (the rubber stud part located farthest inward on the tread) and by at least one rubber connecting element joining the side wall of said stud to the rest of the tread. The projected length, on the tread surface in new condition and in the direction XX&prime;, of the principal geometrical lines of the surfaces of intersection of all the connecting elements of each rubber stud, represents at least 80 percent of the contour perimeter, measured on the same surface, of each rubber stud. Preferably, the principal geometrical lines bounding the surfaces of intersection of the connecting elements are in the form of helixes around XX&prime;, and the projected length of said lines is equal or close to 100 percent of the perimeter.

Tire tread comprising incisions bounding rubber studs

A molding element designed to mold a cut in a rubber article, such as a tire, and in which the cut has a geometry of rotation on an axis XX&prime;. The molding element has a head extended by a molding part intended to project into the molded surface in order to mold at least one cut in the rubber article. The head is mounted for rotation in a mold member, and the head contains at least one circular cylinder of axis XX&prime; defining the main axis of the molding element, and cooperates with mold member in order to permit a rotation on XX&prime; relative to the mold, when the molding part of the molding element is subjected either to a force acting in direction XX&prime; or to a torque about the same direction XX&prime;.

Mold and molding element for molding an incision in a rubber article

A tread for a heavy-duty vehicle tire having radial carcass reinforcement rmounted radially by crown reinforcement which tread has grooves that can be regrooved and wherein those parts of the tread that are located radially under the grooves include depth indicators, each indicator indicating the minimum depth that can be reached for effective regrooving and the maximum depth that must never be exceeded.

Growing community of inventors

Royat, France

Pascal Auxerre