Michelin Recherche Et Technique S.a.

David Jardine

Jean-Jacques Drieux

Bernard Guerinon

James Robert Anderson

Pedro Costa Pereira

Pascal Auxerre

Philippe Esnault

Romuald Gaillardon

Jean-Claude Goutte

Francois Vizet

René Balichard

A tyre for a vehicle wheel comprising two sidewalls, a tread, beads, the sidewall intended to be positioned on the interior side of the vehicle being shorter than that intended to be positioned on the exterior side of the vehicle, a reinforcement structure extending between the beads and maintained in said beads by anchoring zones, each of the beads comprising a specific and distinct arrangement of the anchoring zone thereof, such that the anchoring zone of the bead intended to be positioned on the exterior side of the vehicle exhibits a greater anchoring capacity than the anchoring zone of the bead intended to be on the interior side of the vehicle. The internal and external anchoring zones are thus arranged in such a manner as to produce, in operation, a rim clamping load which is substantially identical on each side.

Extended mobility tire with asymmetrically arranged beads

Vehicle tire including two sidewalls, beads which include a seat and an external flange which are intended to come into contact with a suitable rim, and a carcass reinforcement structure. At least one bead comprises a circumferential cord structure distributed in two regions, and an anchoring region in which the reinforcement structure is anchored in the bead, that region including circumferential cords arranged as stacks distributed symmetrically on opposite sides of the reinforcement structure. The center of inertia of the bead is located in the immediate vicinity of the anchoring region.

Extended-mobility tire with bead having symmetrical load distribution

A device designed for demounting a tire from a rim at least one of whose seats is inclined outwards, the device being in the form of an insert () of length (L) with three faces and whose cross-section in a transverse plane is triangular overall with a contour formed by two long sides () and a short side (), the angle between the long sides being close to the angle between the rim seats and the rotation axis, the length of the short side being essentially equal to the height of the projection of the outward-inclined rim seat, this insert () comprising on its face intended to come in contact with a bead seat at least one relief () designed to interact with said bead seat () so as to keep the insert engaged with the bead.

Device for demounting a tire on a rim with seats inclined outwards

A tire comprising two sidewalls, beads, a reinforcement structure extending radially from each of the beads towards the crown zone, at least one of said beads comprising: The anchoring rubber mix makes it possible, in spite of its rigidity which is very much less than what was advocated previously, to retain very satisfactory endurance properties.

Extended-mobility tire with anchoring zone of substantially low modulus

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

The invention concerns a tire whose crown contains a ply of circumferentially oriented cords. That ply is so arranged that in sensitive zones, as, for example, at the side ends of the adjacent crown reinforcing ply, the laying pitch of the circumferentially oriented cords is markedly increased. That considerably lessens the risk of damage to the circumferentially oriented cords in those zones.

Tire with improved endurance

A tire whose crown has a ply of bimodulus reinforcements circumferentially oriented and spiral-wound, the ply being so arranged that, in the new tire, its reinforcements have a high-temperature contraction potential identical to that of the adhesive yarn before it is introduction in the tire. The tire has an appreciably diminished running noise.

Growing community of inventors

Clermont-Ferrand, France

David Jardine