Abstract: A tire for a heavy goods vehicle, having a tread having a tread surface provided in the new state with at least one groove delimited by opposing side walls, this groove opening onto the tread surface in a discontinuous manner by way of a plurality of portions that are open towards the exterior of the tread, these open portions having two ends that are extended under the tread surface by channels having inlets connected to the ends of the open portions, these inlets to the channels having a mean surface area S. This tread is such that each open portion on the tread surface is provided at each of its ends with a closure device for partially closing the cross section of the inlets to the channels when the tire is running and for leaving a passage unclosed.

Abstract: The present invention provides a pneumatic tire having a carcass 11, at least one circumferential belt layer 17 provided on the outer side in the tire radial direction of the carcass 11, and plural intersecting belt layers 18 provided on the outer side in the tire radial direction of the circumferential belt layer 17, at least one of the plural intersecting belt layers having wider belt width in the tire widthwise direction than the circumferential belt layer 17, comprising: at least one layer of end-portion circumferential belt 15 provided in respective tire widthwise tread end regions on the outer side of the carcass 11 and on the inner side of the circumferential belt layer 17 in the tire radial direction; and at least one layer of slant belt 16 provided in the tire widthwise tread central region on the outer side of the carcass 11 and on the inner side of the circumferential belt layer 17 in the tire radial direction.

Abstract: Two open sipes are formed at a tire circumferential direction central side of a block, and closed sipes are formed in the block at both tire circumferential direction sides of the two open sipes. The depth of the open sipes is set in a range of 50 to 70% times the depth of a first circumferential direction main groove, and the depth dimension of the closed sipe is set in a range of 105 to 140% times the depth dimension of the open sipes. Accordingly high performance on ice is obtained while securing block rigidity.

Abstract: Visco-elastic tire balancing compositions comprising 1) 85 to 97% by weight of a glycol ether component comprising one or more ethylene/propylene glycol copolymer ethers of the general formula (I) or the general (II) or mixtures thereof R—O{[CH(CH3)CH2—O—]m[CH2—CH2—O—]n}H (I) R1—(O—{[CH(CH3)CH2—O—]m[CH2—CH2—O—]n}H)2 (II) wherein R is hydrogen or an alkyl group of 2-8 carbon atoms; R1 is an alkylene moiety of 2-8 carbon atoms in which the two substituents are not carried on the same carbon atom; m is the mole percentage of propylene glycol in the ethylene/propylene glycol copolymer moiety or moieties; and n is the mole percentage of ethylene glycol in the ethylene/propylene glycol copolymer moiety or moieties, wherein the ratio n:m is in the range from 35:65 to 80:20; each glycol copolymer compound having a number average molecular weight in the range of 2000-10000; and 2) 3 to 15% by weight of a fumed silica gel former; said balancing compositions being visco-elastic 1500 Pa and 5000 Pa at 22° C.

Abstract: A pneumatic tire includes a reinforcing ply structure extending between a pair of bead portions, a pair of sidewalls, each sidewall located radially outward of one of the pair of bead portions, a tread radially outward from the reinforcing ply structure, a belt reinforcing structure located radially outward from the reinforcing ply structure and radially inward from the tread, and an innerliner structure extending along an inner surface of the reinforcing ply from a position adjacent one bead portion to a position adjacent the other bead portion. The innerliner structure includes multiple alternating layers of rubber compound and sealant.

Abstract: The invention relates to improving the endurance of the beads of a radial tire for a heavy vehicle of construction plant type by reducing the cracking that starts at the end of the turn-up and spreads through the polymer coating, edging and filling materials. According to the invention, a transition element, made of a polymer transition material, is at least partially in contact, on its axially outer face, with the polymer edging material and, on its axially inner face, with a polymer filling material, the radially outer and radially inner ends of the transition element are respectively radially on the outside and radially on the inside of the end of the turn-up and the elastic modulus at 10% elongation of the polymer transition material is somewhere between the respective elastic moduluses at 10% elongation of the polymer edging material and of the polymer filling material with which the transition element is in contact.

Abstract: Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer.

Abstract: A pneumatic tire includes an internal sealing layer, which partially delimits an internal volume of the pneumatic tire, and a self-sealing layer formed of a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that decreases radially outwards, i.e., towards outside of the pneumatic tire.

Abstract: A pneumatic tire has a carcass ply and a side wall rubber provided in outer sides of the carcass ply. The carcass ply has joint portions obtained by overlapping end portions of ply members so as to join. At least one of the joint portions is provided with a rubber tape. The rubber tape is interposed between the end portions of the ply members and is exposed to a surface of the carcass ply. A topping rubber of the carcass ply and the side wall rubber are formed by a nonconductive rubber. The rubber tape is formed by a conductive rubber. A conductive route getting to the rubber tape from a ground-contacting surface is formed in a tread portion. A conductive route getting to the rubber tape from an outer surface of a bead portion is formed in the bead portion.

Abstract: Provided is a tire having a circular tire frame formed of at least a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on an outer circumference of the tire frame, and the thermoplastic resin material contains at least a polyester-based thermoplastic elastomer.

Abstract: The invention relates to a pneumatic vehicle tire, comprising a carcass (5), a belt (9), and a profiled tread (10), wherein the belt (9) is composed of at least three belt plies (13, 14, 15) arranged one on top of the other from the radial inside to the radial outside, wherein the radially inner (13) and the radially outer (15) working plies have opposite axial inclination directions of the reinforcements (25), and wherein a belt ply (14) arranged between said two working plies (13, 15) has reinforcements (24), the orientations of which include an angle ? of 0°???5° with respect to the circumferential direction U, and wherein the orientations of the reinforcements (23, 25) of one of the two working plies (13, 15) include an angle ? of 10°??<45° with respect to the circumferential direction U, and the orientations of the reinforcements (25, 23) of the other of the two working plies (15, 13) include an angle ? of 45°???90° with respect to the circumferential direction U.

Abstract: A pneumatic tire comprises an overlay wherein the overlay is positioned above the belt plies but beneath the tread, and at least one overlay end is folded and extends inwards toward the center line of the tire.

Abstract: A system for allowing a pneumatic tire supported on a wheel rim of a vehicle to continue in operation after rupture of the tire. The system includes an air bag container which divides the interior tire volume into a radial outer chamber providing normal pressure for inflation of the tire and a radial interior chamber, within the air bag, which is inflated to a substantially higher pressure. The container is intended to rupture when the tire is deflated by a puncture or the like allowing the higher pressure air bag to escape from its container and fill the entire tire volume at a normal operating pressure.

Abstract: A radial tire for motorcycle comprises a tread portion provided with a belt structure composed of two cross plies of 3×3×0.17 steel cords. The steel cord has a bending rigidity of from 10.0 to 12.0 g·cm. The elongation L100 of the steel cord at a tensile load of 100 N is 1.5% to 2.0%.

Abstract: Tire carrying heavy loads comprising a tread band having a plurality of grooves of transverse overall orientation, formed of at least three rubber materials: —a first material M1, in the median part of the tread band, having a secant modulus at 10% elongation measured at a temperature of 23° C. at least equal to 4.0 MPa and hysteresis losses tan(?)max greater than 0.19, —a second material M2, on the edge parts, having a secant modulus at 10% elongation, at 23° C., lower than the first material, and a hysteresis losses value tan(?)max lower than the first material and at least 0.15, —a third material M3, radially below the materials M1 and M2, having a hysteresis losses value tan(?)max lower than 0.12, —wherein first material M1 has a resistance to wear at least 15% better than the second and third materials, which have substantially the same resistance to wear.

Abstract: A heavy duty pneumatic tire has a belt and a tread such that ratio of width of the belt to width of the tread is greater than or equal to 0.95 and is not greater than 1.0. The tread has shoulder land portions on outer sides in axial direction, each shoulder portion has a cap layer including a body portion and a pad, the pad has complex elastic modulus greater than complex elastic modulus of the body portion, the body portion has loss tangent less than loss tangent of the pad, and each shoulder portion has ground-contact surface which has outer and inner ground-contact surfaces separated by boundary between the body portion and pad such that ratio of average ground-contact pressure of the outer ground-contact surface relative to average ground-contact pressure of the inner ground contact surface is greater than or equal to 0.85 and is not greater than 0.95.

Abstract: In a tire according to the present invention, the shape of the outermost reinforcing layer in the tire radial direction is optimized.

Abstract: A pneumatic tire is disclosed. In one sidewall part, a sidewall rubber is formed by a black rubber over the whole circumference in a tire circumferential direction. In the other sidewall part, a different color rubber part for indicating marks on a tire outer surface is provided. The different color rubber part is divided into several sections in the circumferential direction, and the different color rubber part and the black rubber part are alternately and adjacently arranged in the circumferential direction. Side surfaces at both sides in the circumferential direction of the different color rubber part are formed into inclined surface shapes in a direction such that the side surfaces approach each other toward a tire inner surface side, thereby a size in the circumferential direction of the different color rubber part is decreased toward the tire inner surface side.

Abstract: A pneumatic tire with a designated installing direction to a vehicle, includes a tread portion with an inboard and an outboard tread edges, the tread portion provided with a pair of inboard and outboard center main grooves and a pair of inboard and outboard shoulder main grooves to form a center portion, a pair of middle portions, and a pair of shoulder portions, each of the inboard center main groove, the outboard center main groove and the inboard shoulder main groove having a groove width of from 10 to 20 mm, the outboard shoulder main groove having a groove width of from 2 to 5 mm, the outboard shoulder portion provided with outboard shoulder lateral grooves each extending from the outboard tread edge without reaching the outboard shoulder main groove, and the outboard middle portion provided with outboard middle lateral grooves.

Abstract: To reduce the manufacturing cost of a tire that uses a thermoplastic material for a tire frame member. A tire manufacturing method includes: using a thermoplastic material to form a tire frame member (12); disposing cushion rubber (14) (unvulcanized rubber) on an outer peripheral surface of the tire frame member (12); further disposing vulcanized or semi-vulcanized tread rubber (16) on a tire diameter direction outer side of the cushion rubber (14); covering the tread rubber (16), the cushion rubber (14), and at least the tread rubber (16) side of the tire frame member (12) in an envelope, so as to push the tread rubber (16) against the tire frame member (12) side, to configure a provisionally assembled article; and accommodating the provisionally assembled article inside a container and heating the inside of the container to perform vulcanization to thereby adhere the tread rubber (16) to the tire frame member (12).