Abstract: A safety support for supporting the tread of a vehicle tire in case of the oss of inflation pressure of the tire has the shape of a Z. The base of the support is fixed to a wheel rim while the connector between the support base and the support top is oriented so as to join the base on a side thereof opposite that facing the vehicle to which the tire is mounted. The asymmetric shape of the support and its orientation produces improved stability upon intervention of the support.

Abstract: Device (1, 2, 3, 4) for warning of the under-inflation of a tire, mounted the wheel of the tire, includes a stationary element (10, 71) with two inner chambers (11, 12, 73, 74), one (11, 73) of which is brought to the inflation pressure, the other (12, 74) to the atmospheric pressure, and a centrifugal mass (20, 72). A blocking device (30, 90) blocks any displacement of centrifugal mass (20, 72) when the inflation pressure is greater than a certain threshold and frees the centrifugal mass (20, 72) when the inflation pressure decreases below the inflation threshold. Centrifugal mass (20, 72) can then become off-centered under the effect of centrifugal forces and creates a dynamic imbalance able to be sensed by the driver of the vehicle.

Abstract: Rubber areas of a tire having electrical conductivity are used to transmit ignals to an integrated circuit embedded within the thickness of the tire without relying on an inductive or capacitive coupling. Rather, an electric signal from an identification device is conducted to the integrated circuit through a first electrically conductive area of rubber such as a bead cover and/or the tire tread, and a responsive signal is returned to the identification device through a second electrically conductive area.

Abstract: In order to remedy the drawbacks consisting of separations at the end of upturns (50) of the carcass reinforcement (1) of a tire having frustoconical seats as well as the rapid wear of the bead protectors, said tire is provided with beads (B) each of which has an auxiliary bead ring (4) located in the part intended to cover the tire flange (13), a reinforcement ply (5) being wound around the bead ring (4) in order to form two layers (51) and (52) which extend to the tip (6) of the bead (B).

Abstract: An integral rim (J') having frustoconical seats (2') inclined 15.degree..+-.1.degree., the axial widths (P') of which are greatly decreased as compared with the axial widths (P) of the known frustoconical seats (2), and having a mounting groove (3') of reduced height (H') so as to permit an increase in the space available for the braking means. The assembly of a rim (J') as described above and of a tire (T) having beads the tips of which have been truncated permits better resistance of said beads to fatigue while permitting easy mounting. The invention is employed for tires and rims intended for heavy vehicles.

Abstract: The identification of pneumatic tires by electromagnetic coupling with a nsponder embedded in the thickness of the pneumatic tire is made possible by a suitable interrogation antenna so that, regardless of the position of the transponder in the pneumatic tire, a position which is unknown, the coupling is always of the same quality. Such an antenna may take the form of a figure eight or of a closed torus.

Abstract: Tread for heavy vehicles with radial carcass comprising a plurality of cimferential rows of blocks (13) having incisions (15), defined by circumferential (10) and transverse (12) grooves, said blocks being connected to each other in circumferential direction by platforms 14) which are arranged in the transverse grooves (12) and the height of which increases from the center towards the edges of the tread, the depth of the incisions (15) decreasing from the center towards the edge of the tread and the density of the incisions being maximum in the central zone (Z) of the tread.

Abstract: The removal of the tread consists in grasping a zero-degree reinforcement rd, which the crown of the tire must necessarily contain in order to apply this method, and pulling transversely on it until it is completely removed from the tire. In this way, the tread is very easily separated from the carcass of the tire.

Abstract: In order to improve the resistance to dislodging of the beads of a tire ur severe conditions of travel, the combination in accordance with the invention is formed of said tire and a rim (1) the seat of which, placed on the outside of the vehicle, has a circumferential protrusion (2). The base (3) of the bead (B) intended to rest against said seat has a width (L.sub.1) which is at least equal to the axial distance (L) separating the rim flange (11) from the summit (A) of the protrusion (2), a meridian profile adapted to that of the seat, while the rubber bead filler has a modulus of elasticity in extension at least equal to 4 MPa, measured under an elongation of 10%.

Abstract: Tread for heavy-vehicle tires with radial carcass having at least one cirferential groove (1) in the form of a broken line and wide transverse grooves (2) in the form of a broken line defining blocks, the wide transverse grooves (2) having walls of constant and symmetrical inclination over a median zone (6) extending on both sides of the median plane over a width of between 40% and 75% of the width of the tread and having, beyond said median zone and up to the edges, walls of variable and asymmetrical inclination as well as two circumferential narrow side grooves (5) located at a distance from the edges not exceeding 1/3 of the width of the tread and having a depth of between 10% and 70% of the depth of the transverse grooves.

Abstract: A tire mold including a pair of shells (2) for molding the side walls of tire and a ring or sectors (1) for molding the tread of the tire and in which each sector (1) of the mold includes an outer support (10) and an inner mold fitting (11). The contact of the sectors with each other and of the sectors on each side wall molding shell (2) takes place via segments (3) of small cross section, compressed elastically upon the closing of the mold, so as to assure complete tightness of the mold.

Abstract: An assembly (100) for the reinforcing of an article of plastic and/or rubber, characterized by the following features:(a) it comprises two adjacent concentric layers (1, 2) of filaments (10, 20), the filaments (10, 20) having their axes (O.sub.1, O.sub.2) arranged, within each of the layers, substantially on a circle (C.sub.1, C.sub.2) of radius R.sub.1, R.sub.2 ; in each layer (1, 2) the filaments (10, 20) are wound in the same direction and have the same pitch (P.sub.1, P.sub.2);(b) the layers (1, 2) have the same direction of winding;(c) R.sub.1, R.sub.2, P.sub.1, P.sub.2 are in accord with the relationship:P.sub.1 >P.sub.2 >P.sub.1 .times.[1-2(R.sub.2 -R.sub.1)/R.sub.2 ].Articles reinforced by such assemblies, for instance pneumatic tires.

Abstract: Process and device (1) for the heat treatment of at least one metal wire using capstans (2, 3) characterized by the following features: (a) the wire (4) is brought around at least two capstans (2, 3) which conduct the heat and which include recesses (11). The wire (4) is reeved and crossed in said recesses (11), the width of the recesses (11) being slightly greater than that of the wire (4); (b) the capstans (2, 3) are heated or cooled by means of at least one gas (27), which passes between the capstans and a part which is in contact with a heat exchanging fluid; (c) the thickness of the gas layer is chosen according to the heat treatment to be applied. Installations for the heat treatment of metal wires (4) include at least one device (1), metal wires (4) treated by the process and/or the device (1), and/or the installations according to the invention, as well as items reinforced by said wires (4), in particular tire treads.

Abstract: A tread for tires with radial carcass reinforcement and crown reinforcement ormed of at least two plies of cables or cords arranged at angles with the circumferential direction and intended for travel on sand or sandy soil, the tread being provided with closed cells to entrap the sandy soil, the area occupied by the cells being at least 20% of the actual area of contact of the tread with hard flat ground.

Abstract: A method and device (1) for applying threads (9) on a support (11) in order o obtain a ply (13) while imparting a sinuous form to the threads. There is used a rotary drum (2) having rows (4A) of fixed teeth (5A) and rows (4B) with movable teeth (5B) which are displaced parallel to the axis of rotation of the drum. Plies obtained with this method or device and articles incorporating such plies, such articles being, for instance, tires.

Abstract: An assembly formed of a tire and removable protector, intended to be mounted and used on a rim having frustoconical seats. The tire has beads (5) the outer contour of which is formed primarily by a frustoconical zone (80) substantially parallel to the axis of rotation and by a frustoconical zone forming an angle of between 45.degree. and 90.degree. with the axis of rotation. The removable protector (2), the contours of which are adapted on the one hand to the profile (10, 11, 12) of the mounting rim (J) and, on the other hand, to the profile (80, 81, 82) of the corresponding bead (5), is reinforced by a bead ring (3) around which there is wrapped a ply (4) forming two layers (41, 42) extending up to the point (40') of said removable protector (2). While improving the initial life of the tire, the invention permits easier and less expensive recapping.

Abstract: The rim in accordance with the invention is a rim formed of a metal rim b (1) and two movable side rings (2), each of said rings (2) consisting of vulcanized rubber reinforced by a circumferentially stretchable annular element (41) the cross-section of which is only slightly deformable under compressive stress. A tire of an H/B form ratio of 0.80 which is particularly adapted to such a rim has beads each comprising two annular elements (64', 64"; 74', 74"; 84', 84"; 94', 94") which are unstretchable and have faces which make it possible to insert between them either the end (72, 92) of the carcass reinforcement (70, 90) or the carcass reinforcement (60, 80) and/or itself or its turn-up (61, 81).

Abstract: In order to be able to increase the diameter of the standard rim (J') of a ire (P) without independent inner tube, which is provided with beads the seats of which are frustoconical and is normally used on this standard rim (J') having a mounting groove, the tire (P) is mounted on the rim (J) having a cylindrical rim base without mounting groove and the diameter (.phi..sub.JS) of which is greater than the diameter of the mounting groove of the rim (J') by means of two adapters (S.sub.1, S.sub.2) of compression-resistant vulcanized rubber reinforced by meridian and circumferential elements.