Abstract: A radial tire having two carcass half-reinforcements anchored on each side f the tire in a bead, the base of which is intended to be mounted on a bead seat of a wheel rim, each bead having at least one bead wire, the carcass half-reinforcements being joined together by connecting means. Each carcass half-reinforcement consists of a carcass filament which is wrapped around the bead wire to form adjacent strands running from said bead wire at least as far as said connecting means. The strands are arranged in a number of groups of two adjacent strands connected by a loop at the connecting means, the two adjacent strands of each group passing axially on the same side of the bead wire, and alternately axially on one side then on the other side of the bead wire, when passing from one group to the next group.

Abstract: The object of the present invention is a rubber composition which is inted for the manufacture of tires and has a base of precipitated silicas "doped" with aluminum, the aluminum content being between .gtoreq.0.35% and .ltoreq.3% by weight of silica. Said composition has improved working properties as well as improved hysteresis properties.

Abstract: An improved mold (1) for the molding and vulcanizing of annular treads inded, in particular, for the recapping of tires, which includes at least one rigid core (3) defining the inner surface of the tread and a collar (2) divided into sectors (21) which are movable radially between an open position and a closed position of the collar (2) for the molding of the outside of the tread, characterized by the fact that the core (3) bears movable annular elements (5) for the tight connection of the core (3) to the sectors (21) whatever the position of the latter between the closed position of the collar (2) and a slightly apart position of the sectors (21), and that the sectors (21), the core (3), and the annular element (5) define the molding space of the tread.

Abstract: A tire has a radial carcass reinforcement which is anchored in each bead to a bead ring, going from the outside to the inside, forming a turn-up which is substantially parallel to the generatrix of the rim seat J on which the bead is mounted. Each turn-up is reinforced by at least one additional reinforcing ply of cords oriented at an angle between 0.degree. and 20.degree. with respect to the circumferential direction.

Abstract: An arrangement for monitoring the under-inflation of one of the tires of a ehicle comprising a chassis and at least one axle having two wheels equipped with tires, based on an analysis of the differences in position of the wheels relative to the chassis, characterized by the fact that the measurement of the differences in position of the wheels on the same axle relative to the chassis is effected by means of an element of generally U-shape, the central portion of which has a fixed position relative to the chassis of the vehicle, and each of the ends of which are connected to one of the wheel holders of the wheels of the axle in such a manner that any difference in position between the two wheels relative to the chassis of the vehicle results in a twisting of said element.

Abstract: The invention concerns a process and an associated device for the manuface by molding on a countermold (1) by means of a pourable, solidifiable material, a mold intended for molding at least a portion of a tread of a tire, said mold comprising one or more separately made molding elements (4) protruding from said mold. Each element is put in place in a housing (5) in the countermold (1) before the actual production of the mold, in such a manner as to permit easy removal of said mold.

Abstract: A rolling assembly is formed of a tire P with radial carcass reinforcement (1), the equilibrium curve of the thickness center line of which is tangent to the bead cores (2), and of a rim J comprising, axially to the outside of each seat (20) a flange R formed of a frustoconical portion (23) having a generatrix forming an angle of between 20.degree. and 60.degree. with a direction parallel to the axis of rotation, which is connected axially to the inside to the rim seat by an S-shaped portion and which is extended axially towards the outside by a cylindrical portion (25), in its turn extended by the curved end (26), the rim J having an axial width A equal to at most 0.65 times the maximum axial width S of the tire mounted on its rim and inflated to its pressure of use.

Abstract: A method of fitting a tire and support ring on a one-piece wheel rim in wh the rim includes a first wheel rim seating surface and a second wheel rim seating surface, the first wheel rim seating surface tapering outwardly and having a small hump at the axially outer end and being connected axially on the inside to a cylindrical portion intended to receive a tread support ring, the tire having a first bead and a second bead to be fitted, respectively, on the first wheel rim seating surface and the second wheel rim seating surface, and in which the removable support ring is inserted into the tire before fitting the support ring on the wheel rim.

Abstract: A stainless steel wire for reinforcing the crown (1) of tires (100), comping at least 0.02% and at most 0.2% carbon, at least 6% and at most 10% nickel, at least 16% and at most 20% chromium, the content of molybdenum of the steel being zero or at most equal to 5%, the total of the nickel, chromium and molybdenum being at least 23% and at most 28.5%, all these percentages being % by weight;the structure of the steel comprises at least 50% by volume martensite and it is without austenite or comprises less than 50% by volume thereof.Assemblies (620), reinforcement plies (62) and tires (100) comprising this wire.Process for preparing this wire.

Abstract: The present invention relates to a rubber composition reinforced by carbon lack and possibly silica, including at least one diene polymer functionalized or modified by an alkoxysilane derivative and at least one organosilane compound having a primary or secondary amine function or an imine function, which can be used for the manufacture of tires having, in particular, improved hysteresis properties.

Abstract: Mold for a tire or for an annular tread member of a tire, including a mullicity of sectors moving radially and closed by the axial displacement of a crown coming to act upon the frusto-conical sector seats, and of an annular element, midway between the crown and the sector seats, intended to permit axial retraction of the crown when the internal pressure in the cavity of the mold exceeds a given threshold of pressure.

Abstract: The present invention relates to a sulfur-vulcanizable rubber composition mprising, by way of reinforcing filler, carbon black or a mixture of carbon black and silica, at least one functionalized diene polymer bearing at the chain end a silanol function or a polysiloxane block having a silanol end, or modified along the chain by silanol functions and at least one organosilane compound comprising an amine or imine function, which can be used for the manufacture of tires having, in particular, improved hysteresis properties.

Abstract: A method of processing signals in a system for monitoring the tires of a icle, in which it is determined whether there is a clearly under-inflated or over-inflated tire as compared with the other tires of the vehicle and the driver is alerted only when the other tires show a homogeneous dispersion of their inflation pressures.

Abstract: An integral rim intended for mounting a tire having at least two beads and including, when viewed in meridian section, at least a first rim seat, a second rim seat, and a rim base which is without a groove. The first rim seat slopes downwardly towards the outside. The second rim seat has a generatrix, the axially inner end of which is on a circle of diameter at least as great as the diameter of the circle on which the axially inner end of the first rim seat is located. The assembly formed by such a rim and a supporting ring for the thread.

Abstract: A wheel for utility vehicle, comprising a disk, a rim with a circumferential mounting groove between two bead seats and two flanges, the connection between said disk and said rim being made in a connecting region situated between the flank of the groove and the end of the seat which lie axially on the disk side, and a valve passing through said rim via a valve hole, such that said valve hole lies axially between said connecting region and said end of the seat which seat lies on the disk side, and such that if .O slashed..sub.g is the diameter of the radially interior surface of said mounting groove, .O slashed..sub.c is the diameter of the radially interior surface of the disk/rim connecting region, this diameter being taken axially at the end of the disk of the wheel, and .O slashed..sub.s is the diameter of the radially interior surface of the bead seats, this diameter being taken axially at a distance P.sub.

Abstract: A tire (1), a mounting rim (2) therefor and a circumferentially unstretchable ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the supporting ring (3) and a rim flange (24).

Abstract: A tire tread (10) comprising at least some elements in relief, provided w at least one incision (1), each of the facing walls P of which has a surface in relief, formed of protrusions (2) and of cavities (3) arranged on opposite sides of a central wall surface M, each of such protrusions (2) and cavities (3) having, on said central surface (M), a quadrilateral base (b.sub.S, b.sub.C) and a vertex (S, O', A', B', C') spaced from said surface, the base b.sub.S of a protrusion (2) being completely surrounded by bases b.sub.C of cavities (3).

Abstract: A tire includes incisions in a ply of parallel cords of the tire, made pr to the ply's utilization for making the tire. A cutting device for making the incisions is comprised of a reference holder to impose a known orientation to the parallel cords. It is comprised of a blade of a given width C, the blade being positioned transversely relative to the known orientation, the device including an assembly for causing the cutting of the cords by the blade, and including an assembly for moving the blade transversely relative to the holder, and an assembly for moving the ply longitudinally relative to the holder.

Abstract: A method of processing signals in a system for the monitoring of the tires f a vehicle in which the time necessary in order to obtain a cold state of the tires as a function of the previously identified conditions of use of the vehicle before it was stopped is determined. The method allows verification of the natural losses and variations in climate of the tires of the vehicle.