Abstract: A method of processing signals in a system for monitoring tires of a vehi during travel, the system providing for each tire at least one measurement which is characteristic of the condition of inflation of the tire, in which:based on measurements carried out substantially at the same time, the measurement characteristic of one tire is compared with the same measurement of at least one other tire,the result of this comparison is periodically recorded so as to obtain a series of values,an alarm is given off when the variation in time of this series of values satisfies a predetermined relationship.

Abstract: Safety support essentially made of a flexible elastomeric material includ a substantially cylindrical base, a substantially cylindrical cap and an annular body connecting the base and the cap. The body has, on one side, which is intended to be placed on the outboard side of the vehicle, a plurality of cavities extending substantially axially as far as at least halfway into said body without passing through it.

Abstract: Prevulcanized tread strip (1, 10) including a cap (2) and two side wings 20, 30), such that each lateral end of said wings (3, 20, 30) ends in a bead (4, 21, 31) made of elastomeric material with a substantial thickness in the region intended for connection to a tire carcass.

Abstract: Process and device (1) for applying a thread (3) onto a support (9) while parting to the thread (3) a sinuous shape, which are characterized by the following features:a) the thread (3) is delivered with a controlled linear speed of value V.sub.1 ;b) the thread (3) is displaced transversely to its direction of advance;c) it is applied onto the support (9), the thread (3) and the support (9) at the contact being driven with a linear speed V.sub.2 which is less than V.sub.1 ;d) the conformation ratio of the thread (3) is thus defined by the ratio V.sub.1 /V.sub.2.Plies obtained by the process and device (1) of the invention.Articles, in particular tires, made using such plies.

Abstract: The present invention relates to a transfer ring (1) for a tire or tire b having grippers (5) distributed along its circumference which are displaceable radially so as to come into contact with said tire or belt, and having means (8) for controlling the radial displacement of said grippers and means (15) for immobilizing the grippers (5) by blocking them perpendicular to their radial displacement.

Abstract: The machine for manufacturing a tire carcass half-reinforcement from a sie filament wrapped around a bead wire which includes: bead wire holders operated by actuating cylinders, allowing said bead wire to be held in a predetermined position; a ring which has half as many hooks as there will be arches of carcass filament contained in the tire that is to be manufactured, the ring being held a predetermined distance away from said bead wire; a reel of filament which is moved in the central space of the bead wire, wrapped around it, the path crossing the plane of the ring and passing radially inside it; and a mechanism for hooking the filament onto each of the hooks.

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: 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: 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: 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: 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 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.