Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissements Michelin

Societe Detechnologie Michelin

Michael Cogne

Alain Domingo

Vincent Estenne

Philippe Esnault

Sébastien Noel

Murielle De-Tullio

Laurent Nadreau

Bernard Jault

Christelle Chaulet

Patrick Bernadot

Hervé Chardin

Agnes Degeorges

Sebastian Drap

Noël Morel

Karl Van Den Nieuwenhuyzen

Robert Veyret

Niclas Seidel

Jean-Luc Dendievel

Agnès Degeorges

A tire having a radial carcass reinforcement, comprised of at least one layer of metal reinforcing elements, said tire comprising a crown reinforcement, which is itself covered radially with a tread, said tread being joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are non-hooped cords having, in the permeability test, a flow rate of less than 20 cm/min and at least one layer of the carcass reinforcement being provided on at least one side with textile threads oriented mainly along a direction parallel to that of the metal reinforcing elements of said at least one carcass reinforcement layer, said textile threads being corrugated about this main direction.

Tire comprising carcass reinforcing cords of low permeability and textile threads associated with the carcass reinforcement

A technique for comprising the compression fatigue rupture strength of the carcass reinforcement external layer () of an aeroplane tire in the region of bending on the rim (). The distance (d) between a point (A) on the bead external face () and the carcass reinforcement external layer (), measured along the straight line perpendicular at this point to the bead external face, is at a maximum at the point (M) on the bead external face that is the orthogonal projection of the radially external end (E) of the filling element () onto the bead external face, and the distance (d) between the orthogonal projection (M) of the radially external end (E) of the filling element () onto the bead external face () and the carcass reinforcement external layer () is at least equal to 1.3 times the distance (d) between the orthogonal projection (L) of the center (O) of the bead wire core () onto the bead external face and the carcass reinforcement external layer.

Carcass reinforcement for an airplane tire

A tire with a radial carcass reinforcement made up of at least one layer of metal reinforcing elements, the tire comprising a crown reinforcement itself capped radially with a tread, the tread being connected to two beads via two sidewalls. At least 70% of the metal reinforcing elements of at least one layer of the carcass reinforcement are non wrapped cables which, in what is known as the air-wicking test, display a flow rate of less than 2 cm3/min, and at least 10% of the metal reinforcing elements of the at least one layer of the carcass reinforcement are cables which, in what is known as the air-wicking test, display a flow rate of greater than 4 cm3/min.

Tire comprising carcass reinforcement wires having different perviousnesses

A tire with a radial carcass reinforcement comprising a crown reinforcement, itself radially capped by a tread strip, the said tread strip being connected to two beads via two sidewalls, the carcass reinforcement being anchored in each of the beads to form an anchorage region. The tire additionally comprises, in part of at least each of the anchorage regions, at least two layers formed by circumferential winding of a complex strip formed of two layers consisting of continuous reinforcing elements passing from one layer to the other, the said reinforcing elements being parallel within a layer and crossed from one layer to the other at angles with respect to the circumferential direction that are identical in terms of absolute value.

Tire for heavy vehicles comprising at least two additional layers in the beads

Method of manufacturing a tire comprising a carcass reinforcement extending between beads, this carcass reinforcement being anchored in each bead by being wrapped around each circumferential bead reinforcement to form a turned-back portion, this carcass reinforcement comprising at least one rubber ply which is reinforced with a plurality of metal cords of low or zero permeability, each bead comprising a plurality of rubber-based strips, at least one of these strips, known as the bead rubber strip, radially on the outside of the circumferential bead reinforcement performing a function of filling and mechanical connection between the carcass reinforcement and its turned-back portion, this bead rubber strip comprising a first surface axially towards the inside in contact with the carcass reinforcement and a second surface axially towards the outside, each bead further comprising at least one other strip, known as the filler strip which, radially on the outside of the radially outermost points of the turned-back portion of the carcass reinforcement is at least partly in contact with part of the second surface of the bead rubber strip to form a region of contact between the said two profiled elements this method comprising a step of forming a plurality of grooves on at least one of the surfaces of the strips that are in contact in the contact region, these grooves being distant from one another by at least a distance equal to 5 mm, and these first surface of the bead rubber strip being completely devoid of any groove.

Method of manufacturing a tire bead and tire bead

Tire () comprising a radial carcass reinforcement () anchored in beads, the tire () comprising two sidewalls (), each sidewall () extending between a bead () and a crown (), the two sidewalls comprising a first additional reinforcement () positioned either between the carcass reinforcement and the internal cavity of the tire or axially on the outside of the carcass reinforcement and at least one of the sidewalls comprising a second additional reinforcement (), this tire being characterized in that the first additional reinforcement comprises a plurality of reinforcing elements of textile nature oriented at an angle at least equal to 80&#xb0; and at most equal to 90&#xb0; to the circumferential direction, and in that the second additional reinforcement () comprises, in the circumferential direction and in an alternating manner, a plurality of first parts () and of second parts (), these second parts (), having a mean width at least equal to 20 mm, these first and second parts having ultimate tensile strengths, that is to say forces at break per unit width of reinforcement, which are such that the ultimate tensile strength of the second parts () is lower than the ultimate tensile strength of the first parts, and in that the first and second additional reinforcements are positioned one on each side of the carcass reinforcement.

Reinforced tire for heavy goods vehicle

A tirecomprises a radial carcass reinforcementsurmounted radially on the outside by a crown reinforcement, the carcass reinforcementbeing formed of a plurality of metal reinforcing elements. The tire also includes two sidewalls, at least one of the sidewalls comprising an additional reinforcing reinforcementwherein the additional reinforcementcomprises, in the circumferential direction, on the tire a plurality of first partsand of second partsthat have rupture strengths, that is to say, forces that rupture per unit width of reinforcement, that are such that the rupture strength of the second partsis lower than the rupture strength of the first parts. The first partsand the second parts are arranged such that they alternate in the circumferential direction.

Additional sidewall armature for a heavy goods vehicle tire

A safety support includes a substantially cylindrical base configured to conform to the rim. The support further includes a crown with a radially outer wall configured to enter into contact with an internal wall of a crown of the tire in the event of a loss of pressure and to leave clearance therebetween at the rated operating pressure of the tire. The safety support further includes an annular body linking the base and the crown of the support. An envelope of the radially outer wall of the support crown is defined, when the support is mounted on the rim, with f being the deflection undergone by the support mounted on the rim under a load Z, the rated load of the tire, the envelope being confined between two cylinders of revolution of radius Rand Rsatisfying the following relationship:

Safety support with improved endurance

A support for a tire tread band comprising an outer portion for contacting a tread and a base, wherein the base comprises a reinforcement framework having at least two plies of reinforcement elements. Each of the plies has mutually parallel reinforcement elements, and said elements are crossed from one ply to a next ply. The support further comprising a polymer material having a modulus greater than 30 MPa.

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Riom, France

Michael Cogne