Compagnie Generale Des Etablissements Michelin

Compagnie Generale Des Etablissments Michelin

Olivier Reix

Henri Barguet

Michel Ahouanto

Frédéric Perrin

Richard Cornille

Gael Pataut

François Barbarin

Arthur Topin

Jean-Mathieu Clergeat

William License

Philippe Mansuy

Sylvain Morival

Lucas Lauby

Florian Lachal

Stephane Quenard

Jean-Luc Guerbert-Jubert

Rémi Reynal De St-michel

Eva Joannet

Lodoic De Kerret

Stéphane Quenard

The method makes it possible to manufacture an assembly (A) comprising a layer (C) of metal filamentary elements () wound in a helix. The method comprises a step () of supplying a temporary assembly () comprising a layer () of M'>1 metal filamentary elements () and a temporary centre (), and a step () of separating the temporary assembly () between a first split assembly (), a second split assembly () and the temporary centre (). The method comprises a step () of reassembling the first split assembly () with the second split assembly () so as to form the layer (C) of the assembly (A).

Method for separation and reassembly

A multi-strand cord () having a 1×N structure comprises a single layer () of N strands () wound in a helix about a main axis (A), each strand () having one layer () of metal filaments (F) and comprising M>1 metal filaments wound in a helix about an axis (B). The cord () has a total elongation At>8.10% and the energy-at-break indicator Er of the cord (), defined by Er=∫σ(Ai)×dAi where σ(Ai) is the tensile stress in MPa measured at the elongation Ai and dAi is the elongation such that Er is strictly greater than 52 MJ/m.

Single-layer multi-strand cable having improved energy at break and an improved total elongation

A bead core for a tire, which is substantially rotationally symmetrical about an axis, comprises a plurality of windings of at least one metallic wire with diameter d arranged next to one another in a direction P forming an angle α with the axial direction in a radial sectional half-plane R, on N layers superposed on one another in the radial direction, wherein: α ranges from 0° to 10°; in the sectional half-plane R, the windings form a structure consisting of a base structure and a cap structure, wherein the radially inner base structure in the shape of a parallelogram is directly in contact in the radial direction with the radially outer cap structure in the shape of a trapezium. The product of the diameter d times the number of windings L ranges from 13.0 mm to 25.0 mm, and N is less than or equal to 16.

Bead core for agricultural tire

A cord () comprises a single layer () made up of N helically wound metal filamentary elements () having an outer diameter D, the metal filamentary elements () defining an internal enclosure () of the cord of diameter Dv. Each metal filamentary element () has a diameter Df and a helix radius of curvature Rf. With this cord (), D, Dv, Df and Rf being expressed in millimeters: 0.10≤Jr≤0.25, 9≤Rf/Df≤30, and 1.60≤Dv/Df≤3.20, where Jr=N/(π*(D−Df))×(Dh×Sin(π/N)−(Df/Cos(α×π/180))) and α is the helix angle, expressed in degrees, of each metal filamentary element ().

Highly compressible open reinforcing cord

The method enables the production of a final assembly (A) comprising two layers and comprises a step () of providing a temporary assembly (AT) comprising a temporary core (NT), a step () of separating the temporary assembly (AT) into a first divided assembly (AFI), a second divided assembly (AF), a third divided assembly (AF) and the temporary core (NT). The method comprises a step () of reassembling the first divided assembly (AFI), the second divided assembly (AF) and the third divided assembly (AF) to form the final assembly (A).

Method for separating and reassembling a dual layer assembly

An adapter for a rolling assembly having an axis of rotation (YY'), the rolling assembly comprising a tyre having two beads, and a rim having two rim bead seats, for each bead, provides the connection between the bead and the rim, the said adapter comprising an axially inner end connected to the rim, an axially outer end comprising an outer reinforcing element and intended to come into contact, via a substantially radial axially inner face, or bearing face, with a bead, a body connecting the axially outer end to the axially inner end so as to form a single piece, comprising at least one main reinforcement providing the connection between the outer reinforcing element and the inner reinforcing element, and comprising a substantially axial adapter seat intended to come into contact with a bead. The outer reinforcing element is completely axially on the outside of the bearing face, and the outer reinforcing element is a substantially annular structure, referred to as a bead wire, of polygonal section, comprising an individual metal wire of diameter D, the said wire being coated in an elastomer composition and wound contiguously around a support at least three times in an axial direction and at least twice in a radial direction.

Adapter for a wheeled assembly and a wheeled assembly comprising same

Growing community of inventors

Clermont-Ferrand, France

Olivier Reix