Abstract:
Provided is a pneumatic tire for preventing the occurrence of premature wear at tire width direction edge portions due to the use of an endless inclined belt. The pneumatic tire includes two or more layers of inclined belts formed by winding rubber strips S each composed of a plurality of paralleled and rubber coated cords in a direction inclined with respect to the tire circumferential direction while folding back the rubber strips at both width direction ends. Rubber members G are arranged between the rubber strips S layered at the tire width direction edge portions of the inclined belts.
Abstract:
A farm tyre including a carcass; a tread supported by the carcass and having a number of lugs; a tread belt interposed between the carcass and the tread, and having an outer tread ply and an inner tread ply, which are superimposed and each have a number of metal cords embedded in a rubber strip; the tyre. The farm tyre also includes two tread ply wedges, each interposed between the lateral ends of the two tread plies; and protective caps covering the two ends of each of the tread plies, each made of rubber and folded into a ‘U’ about the respective ply end; wherein the protective cap of the inner tread ply is partly defined by an outer appendix of the corresponding tread ply wedge.
Abstract:
A heavy-duty pneumatic tire includes a tread, a pair of sidewalls extending from edges of the tread, respectively, a pair of beads extending along the pair of side walls, respectively, a carcass bridging between the pair of beads, and a belt positioned on a radially inner side of the tread and a radially outer side of the carcass and including plies laminated in a tire radial direction, each of the plies having cords arranged in parallel and a topping rubber. Each of the cords has a 1×4 single-strand structure and satisfies 0.090≦A≦0.112 and 1550N≦E≦1750N, where A represents a ratio F/E, F represents flexural rigidity, and E represents tensile strength per cord.
Abstract:
A tire comprising a crown reinforcement formed from at least two working crown layers of reinforcing elements, a layer C of rubber mixture being placed between at least the ends of said at least two working crown layers, the crown reinforcement including at least one layer of circumferential reinforcing elements wherein the tensile modulus of elasticity at 10% elongation of the layer C is greater than 9 MPa and the maximum value of tan(δ), denoted tan(δ)max, of the layer C is less than 0.100.
Abstract:
A belt width of an intersecting belt 15a having the maximum belt width is set to 80% or more of the maximum width of a carcass line; a difference in belt widths between the intersecting belt 15a and an intersecting belt 15b is set in the range of 10 mm to 50 mm on one side of the belt in the width direction; the intersecting belt 15a is not narrower than the circumferential belt 14, and the circumferential belt 14 is not narrower than the intersecting belt 15b; and a pneumatic tire according to the present invention has an interposed rubber 16 having a thickness increasing toward the widthwise outer side of the tire to be 3 mm or more, and a side-lower rubber 17 having an elastic modulus less than the elastic modulus of a coating rubber coating the circumferential belt 14.
Abstract:
A pneumatic tire for agricultural equipment or forestry equipment includes a circumferential tread, a pair of sidewalls, and a pair of bead portions. A steel reinforced radial carcass ply extends circumferentially about the tire. The carcass ply includes an axially inner portion and axially outer turn-up portions. First and second steel reinforced belts are disposed between the carcass ply and the circumferential tread. Axial ends of the belts are separated by belt wedges. The tire includes a pair of sidewall inserts. Each sidewall insert extends continuously from an upper end extending between the first belt and the carcass ply, through a sidewall region of the tire, to a lower end extending between the inner portion of the carcass ply and one of the turn-up portions of the carcass ply. A tie gum layer binds an inner liner to the carcass ply.
Abstract:
A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls. The tire comprises additionally at least in each shoulder a layer of reinforcement elements which are oriented circumferentially and have an undulation, the axially inner end of said additional layer being radially adjacent to the edge of a working crown layer, the axially outer end of said additional layer being located at a distance from the equatorial plane of the tire which is at least equal to the distance between said plane and the end of the working layer to which it is adjacent and the distance between said layer and the end of the axially widest working crown layer being greater than 1.5 mm.
Abstract:
A heavy duty tire comprises a belt disposed radially outside a carcass in the tread portion, and a belt cushion rubber layer inserted between the carcass and each axial edge portion of the belt. The complex elastic modulus of the belt cushion rubber layer is in a range of from 3.5 to 4.5 MPa. The belt is made up of three plies each made of parallel steel cords inclined at an angle of from 15 to 23 degrees with respect to the tire equator. With respect to the tire equator, the inclination of the belt cords of the radially innermost first ply is opposite to that of the middle second belt ply. The second belt ply is narrower than the first belt ply and wider than the radially outermost third belt ply. The ply strengths S1, S2 and S3 of the first, second and third belt plies, respectively, satisfy: (1) S1>S2, (2) S1>S3, (3) 55≦S1≦75, and (4) 1.25≦S1/S2≦1.65.
Abstract:
A tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls. The tire additionally comprises at least in each shoulder a layer of reinforcement elements which are parallel to each other in the layer and are oriented substantially perpendicular relative to the reinforcement elements of the working layer radially adjacent to said additional layer, said additional layer being radially adjacent to the edge of the radially outer working crown layer, and the axially outer end of said additional layer being located at a distance from the equatorial plane of the tire which is equal to the distance between said plane and the end of the working layer to which it is adjacent.
Abstract:
The invention relates to a tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, at least one protective layer being radially to the outside of the working crown layers, said crown reinforcement being topped radially by a tread, said tread being joined to two beads by means of two sidewalls.According to the invention, the tire additionally comprises in each shoulder at least one layer of reinforcement elements which are oriented circumferentially and have an undulation, the axially inner end of said additional layer being radially adjacent and external to the radially outermost working layer and said axially inner end of the additional layer being radially adjacent and internal to at least part of the protective layer.