Abstract: The invention relates to improving the endurance of a bead of a radial tire for a heavy vehicle of construction plant type by reducing the compression to which the turn-up is subjected when the tire is driven on.

Abstract: Tire for a civil engineering vehicle comprising a tread of high initial thickness E, this thickness corresponding to the thickness of material which can be worn during use, this tread comprising a smooth rolling surface, i.e. without any recesses, intended to come into contact with the ground during rolling, this tread being limited axially by lateral faces, these lateral faces being extended radially on the tire by sidewalls, this tread being provided with a wear indicator device to visually indicate a wear level of the said tread, this tire being such that the wear indicator device comprises, in combination, a plurality of grooves formed on at least one of the lateral faces of the tread and, for each groove, a visual index indicating a wear level corresponding to the percentage of the initial thickness E remaining to be worn.

Abstract: Method for indicating attacks on a tire (1) for a heavy vehicle of the civil engineering type. This method comprises a first step of applying a retroreflective covering material (7) to at least part of at least one tire lateral face (6) allowing visual detection in an environment of darkness of that part of at least one tire lateral face (6), a second step of using the tire (1) in a mechanically aggressive environment, a third step of identifying, in an environment of darkness, the attacked zones (8) of the part of at least one tire lateral face (6) initially covered with the retroreflective covering material (7) and now devoid of the said retroreflective covering material (7) as a result of the mechanical attack experienced by the tire (1) in use.

Abstract: A tire for a handling vehicle, designed to transport heavy loads, over short distances and at low speeds, and a mounted assembly consisting of a tire mounted on a rim. Also, a method for producing such a mounted assembly. A mounted assembly includes a tire mounted on a rim, having a tread designed to come into contact with a ground, two sidewalls extending radially inwards from the ends of the tread, and two beads extending the sidewalls radially inwards and in contact with the rim, an internal cavity containing a filling component consisting of at least one incompressible solid element, and which is a granular filling component consisting of granules at least partly separated from one another by interstices containing at least gas, and the fill rate, which is the ratio between the total volume of the granules, the total of the elementary volumes of the granules, and the volume of the internal cavity, is at least equal to 0.8.

Abstract: Tire for a civil engineering vehicle comprising a tread of high initial thickness E, this thickness corresponding to the thickness of material which can be worn during use, this tread comprising a smooth rolling surface, i.e. without any recesses, intended to come into contact with the ground during rolling, this tread being limited axially by lateral faces, these lateral faces being extended radially on the tire by sidewalls, this tread being provided with a wear indicator device to visually indicate a wear level of the said tread, this tire being such that the wear indicator device comprises, in combination, a plurality of grooves formed on at least one of the lateral faces of the tread and, for each groove, a visual index indicating a wear level corresponding to the percentage of the initial thickness E remaining to be worn.

Abstract: Method for indicating attacks on a tire (1) for a heavy vehicle of the civil engineering type. This method comprises a first step of applying a retroreflective covering material (7) to at least part of at least one tire lateral face (6) allowing visual detection in an environment of darkness of that part of at least one tire lateral face (6), a second step of using the tire (1) in a mechanically aggressive environment, a third step of identifying, in an environment of darkness, the attacked zones (8) of the part of at least one tire lateral face (6) initially covered with the retroreflective covering material (7) and now devoid of the said retroreflective covering material (7) as a result of the mechanical attack experienced by the tire (1) in use.

Abstract: Radial tire which is less sensitive to knocks that occur at the middle of the tread. The tire comprises, radially from the outside inwards, a tread (2), a crown reinforcement (3) and a carcass reinforcement (4). The crown reinforcement (3) comprises, radially from the outside inwards, a protective reinforcement (5), a working reinforcement (6), and an additional reinforcement (7) centred on the equatorial plane of the tire, comprising at least one additional layer (71, 72) formed of metallic reinforcers making with the circumferential direction an angle of at most 10°, the metallic reinforcers of each additional layer (71, 72) being elastic and having a tensile elastic modulus at most equal to 150 GPa.

Abstract: The invention relates to improving the endurance of a bead of a radial tire for a heavy vehicle of construction plant type by reducing the compression to which the turn-up is subjected when the tire is driven on.

Abstract: A purging device is provided for an assembled unit for a vehicle, having both a wheel including a rim and a tire. The purging device has a body connected to the inflation tube of the assembled unit, the body being designed to be subjected to the inflation pressure of the assembled unit, and a piston able to move inside the body. The piston operates an open/close element, fixed to the piston, between a closed position and a purging position of the body, the open/close element being normally closed, the open/close element and the piston each having a face designed to be exposed to the inflation air inside the body in the closed position. The open/close element is opened by the action of an operating force on the piston. Also disclosed is a method for deflating an assembled unit.

Abstract: A tire for a handling vehicle, designed to transport heavy loads, over short distances and at low speeds, and a mounted assembly consisting of a tire mounted on a rim. Also, a method for producing such a mounted assembly. A mounted assembly includes a tire mounted on a rim, having a tread designed to come into contact with a ground, two sidewalls extending radially inwards from the ends of the tread, and two beads extending the sidewalls radially inwards and in contact with the rim, an internal cavity containing a filling component consisting of at least one incompressible solid element, and which is a granular filling component consisting of granules at least partly separated from one another by interstices containing at least gas, and the fill rate, which is the ratio between the total volume of the granules, the total of the elementary volumes of the granules, and the volume of the internal cavity, is at least equal to 0.8.

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 purging device for an assembled unit for a vehicle, having both a wheel comprising a rim and a tire. The purging device comprises a body connected to the inflation tube of the assembled unit, said body being designed to be subjected to the inflation pressure of the assembled unit, and a piston able to move inside the body, said piston operating an open/close element, fixed to the piston, between a closed position and a purging position of the body, said open/close element being normally closed, the open/close element and the piston each having a face designed to be exposed to the inflation air inside the body in the closed position, and the open/close element being opened by the action of an operating force on the piston. Also disclosed is a method for deflating an assembled unit.

Abstract: A tire comprising sidewalls joining a crown part to beads that are intended to come into contact with a mounting rim, these sidewalls comprising a carcass reinforcement anchored in each bead to at least one bead wire and having an end in each bead, the bead wire having, seen in meridian cross-section, an outer profile comprising two profile parts, a first part radially to the inside of axial width L, extending between an axially innermost point and an axially outermost part, and a second part radially to the outside between said points. Each bead comprises at least one additional coupling reinforcement in contact with the carcass reinforcement.

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 tire comprising sidewalls joining a crown part to beads that are intended to come into contact with a mounting rim, these sidewalls comprising a carcass reinforcement anchored in each bead to at least one bead wire and having an end in each bead, the bead wire having, seen in meridian cross-section, an outer profile comprising two profile parts, a first part radially to the inside of axial width L, extending between an axially innermost point and an axially outermost part, and a second part radially to the outside between said points. Each bead comprises at least one additional coupling reinforcement in contact with the carcass reinforcement.

Abstract: An assembly comprising a tire (P) without an inner tube, provided with two beads and intended to be mounted on a mounting rim (J) comprising seats (440) extended radially towards the outside by flanges (R), and a rubber sealing piece (E) arranged between said rim and said tire, characterized in that the diameters (DP) of the tire bead seats are greater than the corresponding diameters (DJ) of the rim seats (440), said tire (P) being provided integrally with the sealing piece (E) formed of three parts which are integral with each other, a central part (51), made of material impermeable to the inflation gases, being placed axially between the beads of the tire, this central part (51) being extended axially beneath the beads of the tire by edges (50) integral with said beads, means being provided for facilitating the separation of the central part from the lateral parts. A process for manufacturing such an assembly.

Abstract: The invention relates to a tire P comprising a radial carcass reinforcement radially surmounted by a crown reinforcement formed of at least two working crown plies formed of metallic reinforcement elements, crossed from one ply to the next, forming angles of between 10 and 45° with the circumferential direction, and of at least one additional layer formed of circumferentially oriented metallic reinforcement elements. According to the invention, at least one additional layer is radially internal to the working crown layers, said additional layer having an axial width greater than the width of the axially widest working crown layer and the reinforcement elements of said additional layer being metallic reinforcement elements having a secant modulus at 0.7% elongation of between 10 and 120 GPa and a maximum tangent modulus of less than 150 GPa.

Abstract: A tire intended to be fitted on a vehicle bearing a heavy load, such as a lorry, construction vehicle and/or aircraft, which tire comprises a carcass reinforcement radially surmounted by a crown reinforcement and a tread. The crown reinforcement is composed of at least two plies of metallic reinforcement elements, which are parallel to each other within the respective ply and are crossed from one ply to the next, forming angles of between 10 and 35° with the circumferential direction. Disposed in each shoulder is an additional ply of reinforcement elements which are parallel to each other in the ply and are oriented radially. The axially inner edges of the additional shoulder ply are radially adjacent to at least one edge of one of the plies of the crown reinforcement. The axially outer edge of the additional shoulder ply is radially lower than the edge of the ply to which the additional shoulder ply is adjacent.

Abstract: The invention relates to a tyre P, comprising a radial carcass reinforcement (1) radially surmounted by a crown reinforcement (3) composed of at least two working crown plies (31, 33) formed of metallic reinforcement elements crossed from one ply (31) to the next (33) and forming with the circumferential direction angles of between 10 and 35°, and by at least one additional reinforcement (32), formed of circumferentially oriented metallic reinforcement elements. According to the invention, the additional reinforcement (32) is formed of at least two layers (321, 322, 323) of metallic elements of a compacted diameter at least equal to 0.6 mm.