Abstract: A method for evaluating the difference between the situation on a site at a given moment and a reference state in regards to the operating conditions of tires of heavy vehicles of the civil engineering type, wherein a user determines at least one zone on the site and determines n parameters which are characteristic of the operating conditions for tires in the zone. The user allocates to each parameter a variance dimension (xi) and enters this dimension in a processor capable of performing an automatic consolidation I of the dimensions of the n parameters. The processor performs a consolidation of the dimensions of the n parameters to give I, the variance dimension index for the zone.

Abstract: A motorcycle tire includes at least one carcass-type reinforcement structure formed of reinforcement elements, anchored on either side of the tire to a bead whose base is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall. The sidewalls meet up radially towards the outside with a tread. Under the tread there is a crown reinforcement structure including at least one layer of reinforcement elements known as a working layer which has at least one continuous reinforcement cord forming portions in the central zone thereof. Those central cord portions display identical angles of between 10-80 degrees formed with the longitudinal direction, the angles being measured at points of intersection of the cord with a circumferential plane. Two adjacent cord portions are linked by a U-shaped loop.

Abstract: An installation for fabricating a mass of rubber comprises a vessel for compounding the mass of rubber. The vessel includes an outlet opening for the mass of rubber; a gate for closing the opening and movable between a position in which the opening is closed, and a position in which the opening is disengaged; scraper means for scraping the rubber adhering to a so-called internal surface of the gate, this device including a movable scraper member comprising an edge designed to scrape the rubber adhering to the internal surface; and synchronization means for synchronizing the movements of the gate and of the scraper member.

Abstract: This adhesion chain for the wheel of a motor vehicle comprises an adhesion tread intended to be in contact with at least the tread of the wheel concerned, and kept in place by means of respectively external and internal tensioning cables. The adhesion tread consists of a net prepared from textile material, said net being prepared by knitting of cords themselves prepared by knitting, so as to define the meshes of said net, and in that the cords include a reinforcing core from a high-modulus material.

Abstract: Rubber composition, which can be used for the manufacture of tyres, based on at least one diene elastomer, one reinforcing filler, one vulcanization system and one maleimide compound, characterized in that the said maleimide compound is a polymaleimide of formula: in which: R1, R2, R3 and R4 are identical or different hydrocarbon radicals, n is equal to 0 or 1 with X being a nitrogen atom if n=0 and X being a carbon or silicon atom if n=1. Use of such a composition for the manufacture of a finished article or of a semi-finished product made of rubber intended for a motor vehicle ground-contact system, in particular of a tyre.

Abstract: Rubber composition based on at least one diene elastomer, a polymer filler as reinforcing filler, a coupling agent providing the bond between the polymer filler and the elastomer. The polymer filler comprises nanoparticles of non-aromatic vinnyl polymer (“NAVP”) bearing a function Z of formula ?Si—X, X representing a hydroxyl or hydrolysable group. The NAVP is in particular a copolymer of methyl methacrylate, trimethoxysilylpropyl methacrylate and ethylene glycol dimethacrylate, in the form of nanobeads the diameter of which is between 10 and 100 nm.

Abstract: A structurally supported tire includes a ground contacting tread portion, a reinforced annular band disposed radially inward of the tread portion, and a plurality of web spokes extending transversely across and radially inward from the reinforced annular band and anchored in a wheel or hub. The reinforced annular band comprises an elastomeric shear layer, at least a first membrane adhered to the radially inward extent of the elastomeric shear layer and at least a second membrane adhered to the radially outward extent of the elastomeric shear layer. Each of the membranes has a longitudinal tensile modulus sufficiently greater than the shear modulus of the shear layer, and a longitudinal compression modulus of a second membrane is at least equal to the longitudinal tensile modulus of a first membrane so that when under load the ground contacting portion of the tire deforms to a flat contact region through shear strain in the shear layer while maintaining constant the length of the membranes.

Abstract: A process for monitoring a tire (11 to 14) mounted on a land vehicle (VH), the process being implemented by means of a central control unit (UC) and an electronic chip (21g to 24g) implanted in a sidewall of the tire. A tire is provided with two chips (21g to 24g, 21d to 24d) implanted in its respective sidewalls, but only one of them is operational during use depending on the mounting direction of the tire. The chips of the same tire contain a given tire identification code (K11 to K14) and specific respective codes (Kg, Kd) that indicate their implantation in the tire. The process is implemented by compiling and/or updating, both in the central unit (UC) and in the operational chip (21g, 22d, 23g, 24d), historical records of the use of the tire by memorising updated values of evolutive parameters of the use of the tire, such as the number of kilometers (DIST) it has covered or its highest running speed (VMAX).

Abstract: A composition well suited to forming gas barrier layers in elastomeric articles is described. The barrier layer may be incorporated into, for instance, inflatable articles that are intended to contain a gas, such as air, under pressure. For example, in one embodiment, the barrier layer may be incorporated into a tire for preventing oxygen or other gaseous components from migrating through the tire. In general, the barrier layer is made from an elastomer that is combined with permeability reducing particles, such as a silicate, and a terpene hydrocarbon resin having a relatively high glass transition temperature. The terpene hydrocarbon resin can improve the processability of the composition and, in one embodiment, can even serve to improve the permeability characteristics of the barrier layer.

Abstract: A method is presented for maintaining a set of at least two components from a group including a wheel rim, a tire and a safety support element, the method including the following steps: providing a set of components, wherein at least one of the components is provided with an information carrier that can be automatically read and is configured to supply at least one data element for use in carrying out the desired maintenance on the set; said set is brought to a maintenance machine that is configured to carry out the desired maintenance on the set under the control of a programmable data management unit; the information carrier of at least one of the components of the set brought to the machine is automatically read and the data is automatically transmitted to the programmable unit; the machine is regulated on the basis of the data transmitted; and the desired maintenance for the set is initiated and carried out by means of the machine.

Abstract: The present invention relates to a rubber composition usable for constituting a tire tread, said composition being based on at least (i) a reinforcing inorganic filler, (ii) a diene elastomer having a molar ratio of units originating from conjugated dienes which is greater than 30% which is prepared in emulsion and comprises carboxylic acid functions along its chain, and (iii) a bonding agent between said reinforcing inorganic filler and said elastomer which consists of a polysulphurised alkoxysilane.

Abstract: A process for simulating the physical behavior of a vehicle tire rolling on the ground with which the tire tread has an area of contact including at least one adherent contact zone and at least one sliding contact zone, which process includes at least modeling operations, numeric value assignment operations, and solving operations, wherein the modeling operations comprise establishing, by applying physical laws that are known and/or developed by specific experimentation, and as a first model, a model of the longitudinal forces (Fx), the transverse forces (Fy), and a self-alignment torque (Mz), transmitted by the tire between the ground and the vehicle, on the basis of specific physical parameters, including an adherence coefficient and a shear modulus of the rubber of the tire, and on the basis of dynamic parameters associated with the physical conditions of rolling and use of the tire, in which the self-alignment torque is associated with the intensity of the longitudinal and transverse forces and their dist

Abstract: Heavy goods vehicle tire comprising a radial carcass reinforcement (10) anchored in each of the beads to an anchoring structure (20), this carcass reinforcement (10) being partially wound around an anchoring structure (20), passing from the inside of the tire towards the outside, a first connecting reinforcement (30) partially in contact with the carcass reinforcement (10) and wound around the anchoring structure (20), a second connecting reinforcement (40) formed of a plurality of reinforcing members directed in a mean direction that makes an angle of 50 degrees at most with the circumferential direction and envelopes the first connecting reinforcement (30) to form an internal portion (41) and an external portion (42), the internal portion (41) being in contact over a length V1 with the carcass reinforcement between a first end point D1 of the said first portion and the end point P1 of the first connecting reinforcement (30), the external portion (42) being in contact with the carcass reinforcement from a po

Abstract: A mechanism for laying a strip on a receiving surface rotating about a first axis. The mechanism includes a laying head moving along a second axis oriented parallel to the axis of rotation of the surface and along a third axis oriented parallel to a radial direction passing through the point of contact between the receiving surface and a strip applicator of the laying head. The laying head is rotatable about a front axis oriented substantially perpendicular to the second and third axes and passing through the contact point. the laying includes a device for estimating the value of the of the angle ? formed by a tangent to the transverse profile of the surface and the second axis. The movements of the laying head are determined by the value of the angle ? in such a way as to displace the laying head in a direction parallel to the tangent following the transverse profile of the receiving surface.

Abstract: A device (20) comprising a pressure measurement surface (28) functionally attached to a proof body (22) and a rigid component (30), functionally attached to the proof body (22), the measurement surface (28) forming a surface of the rigid component (30). In addition, the device comprises a support (38), functionally separated from the proof body (22), of generally annular shape, housing the rigid component (30) and a flexible mass (40) radially inserted between the support (38) and the rigid component (30) such that the contour of the measurement surface (28) is bounded by the flexible mass (40), this flexible mass (40) adhering to the support (38) and to the rigid component (30).

Abstract: An encoding device and method, of CABAC type, for an initial stream of binary digital information intended to generate an outgoing stream to form video images, after decoding, the method included the following steps: bit-by-bit analysis of the successive series of bits of the initial binary stream so as to deduce therefrom, for each bit, an interval representing the probability of occurrence associated with this bit, this interval being defined by its size CIR and its lower bound CIL, analysis of this interval so as to ensure, if necessary, a renormalization thereof. The renormalization is non-iterative and for each bit of the initial stream is compliant with the appended figure in which: M is the length of the sequence S of high-order bits common to CIL and CIR, N is the integer number such that CIR.2N-1<0.25?CIR.2N, BO is the number of bits waiting to be inserted.

Abstract: Presented is a heavy vehicle, such as a transport vehicle or civil engineering vehicle, of a mass greater than 500 metric tons configured to carry heavy loads and operable to generate a motive power. The vehicle includes tires of radial structure having a diameter greater than 3.5 meters and an axial width greater than 37 inches, a front steering axle coupled to at least two tires, at least one rear axle coupled to at least two tires and by which is transmitted at least part of the motive power, and a third, intermediate axle coupled to at least two tires. The intermediate axle is a steering axle and is moveable to a raised position. When the intermediate axle is in the raised position, the tires coupled to the intermediate axle are not in contact with the ground.