Abstract: A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls.

Abstract: A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, one at least of said blocks consisting of a polyisoprene and at least one other block consisting of a diene elastomer other than a polyisoprene the molar ratio of units originating from one or more conjugated dienes of which is greater than 15%.

Abstract: A tire includes comprising a radial carcass reinforcement surmounted radially by a crown reinforcement including a working reinforcement. The working reinforcement includes two working crown plies of calendered inextensible metalic reinforcement elements and rubber mix, and a protective ply of metalllic reinforcements. The metallic reinforcement elements of the working crown plies are parallel to each other within each working crown ply and are crossed from one working crown ply to the next, forming with the circumferential direction angles ?1 and ?2 of between 10° and 45°. The working crown plies include a radially inner working crown ply having an axial with L3 which is greater than L2. A layer P of cohesive rubber mixes is arranged between at least the ends of the working crown plies.

Abstract: The wheel and tire assembly for running on ground includes measurement means carried by the wheel for measuring topological parameters of the inside surface of a pertinent portion of the tire. These measurement means comprise lighting and viewing means for lighting and viewing a calibrated surface pattern that is subjected to the deformation of the inside surface of the pertinent portion of the tire. The viewing means are preferably of the stereovision type or of the structured light type.

Abstract: The invention concerns a tire provided with a capacitative sensor including two substantially parallel electrodes, the sensor being carried by a sidewall of the tire. The electrodes of the sensor lie substantially in a plane perpendicular to the rotation axis of the tire and are substantially orientated in an ortho-radial direction. The invention also concerns a tire provided with a deformation sensor, a method for evaluating the deflection of a tire, and a deformation sensor.

Abstract: A tire tread incorporating an elastomeric composition reinforced with silica, based on at least (phr=parts by weight per hundred parts of diene elastomer): (i) a diene elastomer; (ii) as reinforcing filler, more than 80 phr of an inorganic filler constituted in its entirety or in part by a silica (referred to as LS) having the following characteristics: (a) a BET specific surface area of between 50 and 100 m2/g; (b) an average particle size, dW, of between 50 and 350 nm; (iii) a coupling agent providing the bond between the reinforcing inorganic filler and the diene elastomer; (iv) a vulcanization system based on sulfur. Preferably, this LS silica furthermore has a disagglomeration rate ? greater than 5×10?3 ?m?1/min (measured in the ultrasound disagglomeration test).

Abstract: An elastomer composition based on at least one diene elastomer, an inorganic filler as reinforcing filler, a polyfunctional organosilane as (inorganic filler/diene elastomer) coupling agent bearing at least two functions denoted “X” and “Y” which are graftable, on the one hand, to the elastomer by means of the X function and, on the other, to the inorganic filler by means of the Y function, characterized in that said Y function is a hydroxysilyl function (?Si—OH). Preferably, this organosilane is a hydroxysilane polysulfide, the diene elastomer is selected from the group consisting of polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers and the reinforcing inorganic filler is a siliceous or aluminous filler of the highly dispersible type. Tires or semi-finished products for tires, in particular treads for tires comprising a composition according to the invention.

Abstract: According to the method, the risk is estimated as a function of a maximum grip potential ?max of the tire, a utilization percentage Pu representative of the fraction of the maximum grip potential of the tire that is being used, and a magnitude Ps associated with a risk of the tire hydroplaning, in particular a loss of tire area.

Abstract: Electrical connection system between a wheel and a bearing-hub assembly, the wheel being mounted on an outer flange of the bearing-hub assembly, and the bearing-hub assembly comprising a rotationally fixed outer ring attached to the vehicle's suspension and an inner ring provided with a centering collar, an open frontal cavity defined in the said centering collar and an axial cavity opening into the said cavity; the connection system having a first connection cable attached to the inner ring and extending inside the axial cavity and the frontal cavity, a second connection cable integrated with the wheel, and a connection element associated with the said centering collar to provide electrical contact that can be selectively disconnected between the first cable and the second cable.

Abstract: A process is described for obtaining a 1,3-butadiene homopolymer by the reaction of a catalytic system in the presence of 1,3-butadiene and one or more monoolefin(s) with 4 carbon atoms. This catalytic system is based on at least: a conjugated diene monomer, an organic phosphoric acid salt of one or more rare earth metals, said salt being in suspension in at least one inert, saturated and aliphatic or alicyclic hydrocarbon solvent, an alkylating agent of the formula AlR3 or HAlR2, where R is an alkyl group, and an alkylaluminum halide halogen donor.

Abstract: A tire with two beads (11) and a radial carcass reinforcement (12) anchored in each bead by an upturn (15) which forms at least one loop around a circumferential bead reinforcement (13), said upturn—when viewed in meridian section—beginning at a point of origin (A1) that corresponds to the point of intersection between the carcass reinforcement and a line (D) perpendicular to the tire's rotation axis and passing through the radially innermost point (A) of the circumferential bead reinforcement (13). A feature of the tire is that when viewed in meridian section, the end (F) of the upturn (15) is located between said upturn (15) of the carcass reinforcement and the circumferential bead reinforcement (13).

Abstract: A technique for predicting the wear of at least one tire whose tread has pattern elements and which is fitted to a terrestrial motor vehicle, and a system for implementing the technique that enables a user, such as the vehicle's driver, to know reliably at any given moment the level of wear on the tire or on all the tires, or how long the residual wear will last, or even the remaining available running distance. Also, the piloting of drive-aid systems such as “ABS” (anti-block braking system) or “ESP” (electric programmed stability device) systems can be adapted as a function of the wear characteristics of the vehicle.

Abstract: A process for manufacturing a composite block of closed geometry, in the form of a continuous ring, based on fibres and on a crosslinkable resin, by continuous winding and superposition of several layers of a tape of reinforcement fibres embedded in a matrix based on a composition comprising a crosslinkable resin. The process comprises from upstream to downstream, the following steps: producing a rectilinear arrangement (12) of reinforcement fibres (11) and conveying this arrangement in a feed direction (F); degassing the arrangement (12) of fibres by the action of a vacuum (13); after degassing, impregnating said arrangement (12) of fibres under vacuum with said resin composition in the liquid state (17); passing the pre-preg thus obtained through a die (20) to make said pre-preg into the form of a tape (21) composed of reinforcement fibres (11) in their liquid resin (17) matrix, the thickness of said tape being less than 0.

Abstract: The present invention relates to a mounted assembly (i.e. tire/wheel assembly) for an automobile vehicle, comprising a rim, a safety support which is mounted on the rim and at least the radially outer face of which is formed of a material of very high modulus, a tire casing mounted on the rim around said support, said rim having on each of its two peripheral edges a rim seat on which is mounted a bead of said casing, and comprising between its two seats a bearing surface receiving said support; this mounted assembly is characterised in that: the material of very high modulus has a secant tensile modulus at 10% elongation, measured at 80° C. and denoted E10, which is greater than 50 MPa; the mounted assembly is provided with a lubricating composition having values of viscosity (denoted respectively ?1 and ?2), expressed in Pa·s and measured at 20° C., which satisfy the following relationships: at a shear rate of 0.3 s?1: 80<?1<2500; at a shear rate of 10 s?1: 0.1<?2<35.