Abstract: A method for producing a mould lining (G) intended for the manufacture of tires comprising tread blocks that have incisions in them and studs. A mould lining is produced by positioning lamella (L1, L2, L3, L4, L5, L6) of substantially equivalent shape and length on the parts of the lining (G) that are intended to mould the rubber blocks. In a next step, the material of the lining (G) and of the lamella (L1, L2, L3, L4, L5, L6) contained in a cylindrical space located at each of the sites intended to accept pins capable of moulding the housings for the studs is removed radially, and an insert supporting a pin is positioned in the hole obtained beforehand.

Abstract: A tire with a radial carcass reinforcement intended to equip a heavy vehicle such as a transport vehicle or construction machinery, the tire having an axial width grater than 37 inches. The tire includes a working crown reinforcement having at least two continuous plies formed from reinforcement elements crossed from one ply to the next, forming with the circumferential direction angles of between 10° and 35°. The working crown reinforcement is supplemented on each side of the circumferential mid-plane by at least three half-plies whose reinforcement elements form with the circumferential direction angles of between 10° and 40°. The half-ply extending axially the most towards the outside is in contact with at least two other working crown half-plies, and the three half-plies radially overlap the axially external ends of at least two continuous working crown plies.

Abstract: A cord is supplied continuously and on demand by a suitable distributor. The apparatus is used with a revolving form (1) on which the reinforcement is progressively built up by depositing sections of the cord along a desired trajectory for the cord on the surface of the form. The apparatus comprises an element for depositing the cord on the surface of the form (1), describing an alternating path between two turning points, pressers close to the turning points in order to apply the cord to the form at the ends of the trajectory, acting synchronously with the depositing element, a mobile guide (5) disposed opposite the form, in the space between the form and the path described by the depositing element, a fixed guide (6) substantially parallel to the mobile guide (5), control means for moving the mobile guide (5) in a circumferential direction, and motorization means for synchronously piloting the depositing element, the pressers, and the control means of the mobile guide (5).

Abstract: A heavy vehicle of a mass greater than 40 metric tons and operable to generate a motive power is disclosed. The vehicle includes a first axle, at least two first tires mounted on the first axle, a second axle for transmitting at least part of the motive power, and four second tires mounted on the second axle. At most two of the second tires are driving or motive power transmitting tires. Each of the second tires is associated with a respective braking device.

Abstract: A tire tread comprising a rubber composition based on at least: (i) a diene elastomer; (ii) more than 50 phr of a reinforcing inorganic filler; (iii) between 2 and 15 phr of a coupling agent; (iv) an unsaturated metal carboxylic acid salt. This tread has, after mechanical running-in of the tire comprising it, a rigidity gradient which increases radially from the surface towards the inside of the tread, imparting to the tire an improved compromise of grip/behavior properties. Use of such a tread for the manufacturing or recapping of tires. Tires comprising such a tread.

Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.

Abstract: A carcass reinforcement for a tire which is intended to bear heavy loads, comprising a composite fabric which comprises a rubber composition of reduced hysteresis and metal cables reinforcing the composition. The elastomeric matrix thereof comprises natural rubber or a synthetic polyisoprene in a majority proportion, and a reinforcing filler comprising a carbon black which meets all of the following conditions: (i) 45?CTAB specific surface area in m2/g (in accordance with Standard ASTM D3765-80)?70, (ii) 45?BET specific surface area in m2/g (in accordance with Standard ASTM D4820-93)?70, (iii) 45?iodine adsorption index IA in mg/g (in accordance with Standard ASTM D1510-81)?70, (iv) ratio (BET surface area/index IA)?1.07, (v) 115?DBP structure value in ml/100 g (in accordance with Standard ASTM D2414-93)?170, (vi) 85 nm?Stokes diameter dst in nm?145, where dst is the diameter of aggregates corresponding to the maximum frequency of the Stokes diameters in a distribution of aggregates, and (vii) D50/dst?0.

Abstract: A crosslinkable or crosslinked rubber composition is described which includes a diene elastomer having a mass content of cyclic vinyl units of greater than 15%, and which may be used to form a tire tread. Also described is a tire tread and a tire incorporating the tread. The composition contains a linear or branched diene elastomer derived from at least one conjugated diene, and a reinforcing filler. The elastomer has cyclic vinyl units according to a mass content of greater than or equal to 15% and a number-average molecular weight of from 30,000 to 350,000 g/mol. The elastomer may be obtained by anionic polymerization of one or more monomers including a conjugated diene in an inert hydrocarbon solvent with a catalytic system including an organolithium initiator and a polar agent with several heteroatoms. The reaction may be performed batchwise where the polar agent:initiator molar ratio is greater than 8, or continuously where the polar agent:initiator molar ratio is greater than or equal to 3.

Abstract: Device for measuring the rheological properties of a viscoelastic material, formed of an upper rotating plate (10) and of a lower rotating plate (20) which are able to press against the opposite faces of a sample S of the material to be measured. The axes of rotation (a1 a1? and a2 a2?) of said plates are arranged parallel to one another in a direction perpendicular to the plane formed by the plates, and offset from one another by a distance d. Two independent motors (12, 22) drive respectively the upper plate (10) and the lower plate (20) at the same speed of rotation ?, without giving rise to any angular displacement between the two plates.

Abstract: A system for wireless data communication between a vehicle and at least one of its tires (10), the system comprising a fixed antenna mounted on the vehicle and an antenna integral with the tire (10), the latter antenna being located in proximity with the tire's (10) belt. The characteristics of the tire belt are chosen in order to achieve an increased transmission distance.

Abstract: A tire with reduced rolling noise includes a tire structure formed of at least one crown extended by two sidewalls and two beads. A base of each of the two beads is configured to be mounted onto a rim seat. The tire also includes a carcass-type reinforcing structure anchored into the two beads and an additional layer bonded to an inner wall of the tire structure. The additional layer is bonded to the tire structure at its edges and the rest of the additional layer is not bonded. The additional layer includes an inflation valve.

Abstract: A tire with a cellular layer is provided. The tire includes a tire structure formed of at least one crown extended by two sidewalls and two beads. A base of each of the two beads is configured to be mounted onto a rim seat. The tire also includes a carcass-type reinforcing structure anchored into the two beads, and a layer that includes a cellular material, also referred to as a cellular layer. The cellular layer is positioned on an inner wall of the tire structure, such that the cellular layer is bonded to the tire structure over at most over 20% of a surface of the cellular layer and is not bonded to the tire structure elsewhere on the surface.

Abstract: A rubber composition, usable for the manufacture of tires, is based on at least one diene elastomer, reinforcing filler, vulcanization system and, as anti-reversion agent, a citraconimidomaleimide compound of the formula (R=hydrocarbon radical): The composition may be used for the manufacture of a finished article or a semi-finished product made of rubber intended for a ground contact system of an automobile, in particular of a tire.

Abstract: A tire (1) comprising over at least part of its surface at least one applique (8). The applique (8) includes a first layer (9) in contact with the air and constituting the upper layer of the applique, and a second layer (10) in contact with the tire (1) and constituting the lower layer of the applique (8), said lower layer (10) of the applique including a bielastic fabric. The fabric used is preferably a bielastic knitted fabric, that is to say a mesh fabric of which the loops which form the mesh are capable of moving relative to one another in the knit direction and perpendicular to the knit direction.

Abstract: The device (12A, 12B) comprises first and second inclinometers (IT1, IR1; IT2, IR2) carried by first and second axles (T1, R1; T2, R2). The inclinometers are designed to measure respective angles of inclination of the first and second geometrical axes of the axles passing through the centers of the wheels carried by each of the axles, about an axis of inclination (ITL; IRL) parallel to a first direction. The device (12A, 12B) includes calculation means (18) suitable for calculating, over a given time interval, a history of an angle of inclination, referred to as an inclinometer history, in particular for each angle of inclination of the first and second axle axes. The device includes means (20) for calculating an indicator from at least two inclinometer histories, referred to as a deviation indicator, which indicator serves to compare the inclinometer histories, in particular the inclinometer histories for the angles of inclination of the first and second axles.

Abstract: 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 Rmax and Rmin satisfying the following relationship: 0.2f<Rmax?Rmin<2f.

Abstract: A method for monitoring the operational condition of a tire equipping a vehicle, includes: producing, over time, representative samples of successive values assumed by a changing physical quantity, under otherwise equal conditions, with respect to the number of moles of gaseous fluid present in this tire, exploiting these samples in order to deduce from them an estimated condition of the tire, comparing it to a range of normal driving conditions, and producing an alarm in the case where the estimated condition of the tire is situated outside the range of these normal conditions. The step of exploiting the sample includes comparing the value of an indicator of dispersion of the physical quantity, such as the variance of this quantity, to a predetermined threshold value (L).

Abstract: A device for counting the rotations of a tire on a vehicle using the deformations that the tire undergoes on each rotation of the wheel, comprising a casing, a sensor intended to generate an electrical signal on each rotation of the wheel, and connection means intended to mechanically connect the casing and the sensor to the surface of the tire. The sensor is in the form of a passive sensor in one piece with the casing, whereof the signals emitted are in proportion with the variations over time in a magnetic flux through the said passive sensor, and a magnetic field generator is arranged opposite the passive sensor. The connection means mechanically connect the casing to a first surface A and the magnetic field generator to a second surface B, the two surfaces A and B being substantially coplanar and offset from one another in a direction D by a given distance L. The electrical signal is produced by the relative displacements of the said passive sensor and the said magnetic field generator.

Abstract: The present invention concerns in particular a process for mounting onto a wheel rim (10), on the one hand a tyre (600) comprising first and second beads (620, 610) respectively designed to be mounted on a first and a second rim seat (13?, 13?), and on the other hand a safety support designed to be mounted inside the tyre on a bearing surface of the rim.

Abstract: A method for measuring inflation pressure of a vehicle tire involves measuring a compressive stress. The tire includes a rubber mass, referred to as an interior rubber, delimited by an internal surface in contact with air inside the tire and an external surface in contact with a carcass ply of the tire. The compressive stress in the interior rubber of the tire, between the internal and external surfaces of the interior rubber, is measured and the inflation pressure is deduced from this compressive stress.