Abstract: A run flat pneumatic tire includes a thin annular monolithic band embedded in the crown portion of the tire wherein the band has a helical cut extending between opposite band edges. The cut has an arcuate length between 45° and 360° and provides a circumferentially expandable band which enhances molding of the tire by enabling the band to expand during molding to minimize porosity and reduce entrapment of air between the band and tread rubber. Alternately, a pair of helically cut bands are joined by an intervening band of rubber and a reinforcing layer of reinforcing cords in a rubber skim may extend about the outer surface of the expandable band or bands.

Abstract: A pneumatic tire, which may be used as a control tire for calibrating tire testing equipment, comprises a pair of annular beads (40), at least one carcass ply (15) wrapped around the beads, belt reinforcement (13,14,16) disposed over the at least one carcass ply in a crown area of the tire, a tread (12) disposed over the belt reinforcement, and sidewalls (18) disposed between the tread (12) and the beads (40), The tire is made with a tread (12) having no grooves or sipes, and which comprises a radial medium truck tire retreading compound. The belt reinforcement (17,17a,17b ) is laid up in the circumference of the tire with a low angle, i.e. less than 0.75° with respect to the EP of the tire in the second belt (14), and less than 0.5° with respect to the EP of the tire in the first belt (13,16).

Abstract: A pneumatic radial tire having in axial cross-section a highly curved tread is reinforced by a breaker assembly with improved resistance to breaker edge looseness. The breaker assembly includes one breaker ply which extends between two bead regions and has its edges disposed between a carcass main portion and a carcass turn-up portion. An improved single-stage method may be employed for building the tire.

Abstract: A radial tire is provided with a metal belt comprising two load-bearing strips, respectively a first one and a second one, with reinforcing elements inclined in opposite directions in the two strips relative to the equatorial plane, and a pair of lateral bands radially superimposed on the ends of the second strip. The second strip has an axial width less than the first one and has edges staggered axially inwards with respect to the edges of the first strip. Each band comprises a single layer of circumferential metal reinforcing elements and has its axially external edge staggered axially inwards with respect to the edge of the second strip. A third strip with inclined reinforcing elements is arranged in the radially outermost position of the belt and covers at least two thirds of the width of each band. The pair of bands covers at least partially the two ends of the second strip in a diverging configuration relative to the two ends of the first strip.

Abstract: A high-transverse-curvature tire (1), in particular for mounting onto the rear wheel of motor-vehicles, comprises a tread band (8), coaxially extended around a belt structure (6), wherein a plurality of rubber blocks (10), defined between a plurality of grooves (1 1) extending along a direction substantially transverse to the tire running direction (D), are formed which grooves comprise a bottom (12) connected to opposite inlet (13) and outlet (14) sidewalls. In an equatorial zone (E) of the tread band (8), the inlet wall (13) of the grooves (11) is inclined with respect to the bottom (12) of the same towards the tire rolling direction, and forms an angle (&agr;) of from 50° to 80° with respect to a plane (&pgr;) tangent to the bottom (12).

Abstract: A tire (1) for motor-vehicle wheels comprises a tread band (10) and a belt structure (6), the tread band being molded with a raised pattern having a circumferential groove (11). In the absence of load and inflating pressure, the tire is characterized in that the belt structure in a cross-section of the tire has an axial profile comprising three distinct portions, first (14) and second (15) side portions and one central portion (16) interposed between the side portions. The side portions are concave at a radially internal position, in which the concavity is defined for each portion by a respective center and a respective radius of curvature. The central portion is concave at a radially external position where the concavity center of the central portion lies in the center line plane of the circumferential groove, in which the depth of the radially external concavity is canceled under the effect of the normal inflating pressure of the tire.

Abstract: A heavy duty radial tire which comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the bead portions and composed of a single ply of steel cords arranged radially at an angle of from 70 to 90 degrees with respect to the tire equator, and a belt disposed radially outside the carcass in the tread portion and composed of two cross plies of steel cords laid parallel with each other at an angle of from 0 to 45 degrees with respect to the tire equator, wherein in at least the central part of the tread portion having 50% of the axial width of the belt, the total amount of steel in the belt plies being in the range of from 6 to 10 times the steel amount in the carcass ply, and the thickness of rubber between the radially adjacent belt cords and carcass cords is in the range of from 0.7 to 3.0 mm. Preferably, the two belt plies are made of substantially the same amount of steel in the central part.

Abstract: A strip of tire ply stock is reinforced with steel cords wherein the steel cords are constructed of high strength wire filament having at least a tensile strength of −2000×D+4400 MPa where D is the filament diameter in mm. Tires are constructed with the ply stock in the belt and/or carcass.

Abstract: A tire having a crown, two sidewalls and two beads, a carcass reinforcement anchored in the two tire beads and a belt reinforcement, the belt reinforcement including at least two superposed reinforcing plies formed by cords parallel in each ply and criss-crossed from one to the other forming with the circumferential direction angles (&agr;, &bgr;) ranging between 10° and 70° and characterized in that, there is provided, between the two superposed reinforcing plies, at least two axially adjacent rubber decoupling layers with different mechanical properties and in that each of the two rubber decoupling layers is in contact with the cords of the two superposed reinforcing layers.

Abstract: A pneumatic tire for a front wheel of a motorcycle comprises a pair of bead cores, a radial carcass toroidally extending between the pair of bead portions, a belt disposed on a radially outer surface of the carcass, and a tread portion disposed thereon, wherein the carcass is comprised of at least one carcass ply containing organic fiber cords, and the belt is a spiral belt layer formed by spirally winding a continuous rubberized cord or a continuous ribbon-shaped body containing plural cords therein in a widthwise direction of the tire, and the tread portion has a two-layer structure comprised of a cap rubber layer and a base rubber layer in at least a central region in the widthwise direction of the tire, or a reinforcing layer is disposed inside an innermost carcass ply or on an inner surface of an innerliner, or the bead core is a helically wound laminate of a single steel wire having a polygonal shape at a section of the bead core in the radial direction.

Abstract: A pneumatic tire comprises the following belt (A) or belt (B). The belt (A) comprises a ply made of waved monofilament steel cords and a ply made of multi-filament steel cords, wherein the waved monofilament steel cord is (1) spirally waved so that the wave pitches PA are in a range of from 14 to 50 mm and the amplitude HA of each wave is in a range of from 0.002 to 0.02 times the pitch PA of the wave, or (2) two-dimensionally waved so that the wave pitches PB are in a range of from 5 to 50 mm, and the amplitude HB of each wave is in a range of from 0.002 to 0.05 times the pitch PB of the wave. The belt (B) comprises two plies made of waved monofilament steel cords, wherein the waved monofilament steel cord is waved so that the wave pitches P are in a range of from 0.008 to 0.08 times the circumference of the tire and the wave height of each wave is in a range of from 0.002 to 0.025 times the pitch P of the wave.

Abstract: Disclosed is a pneumatic tire which comprises a carcass layer provided between a pair of left and right bead sections, left and right side wall sections interpolated for connecting the pair of left and right bead sections with a tread section to be continuous, and at least two belt layers provided in an outer peripheral side of the carcass layer in the tread section, each of the belt layers being composed of a plurality of reinforcing cords coated with coating rubber. Storage elastic modulus E′ of the coating rubber is set in a range of 15.0 to 40.0 MPa, and its loss tangent tan &dgr; is set in a range of 0.1 to 0.25. Interlayer rubber is provided between end parts of the belt layers, the interlayer rubber being specifically set in each of both end parts thereof in a tire width direction, and elongation to break Eb of the interlayer rubber is set in a range of 400 to 700%.

Abstract: A pneumatic radial tire for passenger car comprises a circumferential belt layer in addition to a slant belt layer, in which specified PET, nylon, PEN or vinylon fiber cords or steel cords are used in the circumferential belt layer.

Abstract: A tire having a crown, two sidewalls and two tire beads, a carcass reinforcement anchored in the two tire beads and a belt reinforcement, said belt reinforcement including at least two superposed reinforcement plies formed with cords parallel in each ply and criss-crossed from one ply to the other forming with the circumferential direction angles (&agr;, &bgr;) ranging between 10° and 55° and characterized in that the cords of at least one of the two reinforcing plies are successively in contact, on the same side of said ply, moving from the tire equatorial plane towards one of the reinforcing ply lateral ends with a rubber bonding layer having a first modulus of elasticity and then a rubber bonding layer of a second modulus of elasticity lower than the first.

Abstract: Tires using high tensile reinforcement with value of at least 1240 N(280 lbs) for U+T type cord and at least 2000 N(450 lbs) for bunched type cord.

Abstract: A pneumatic tire comprising a rubber member containing a short fiber (A′) formed by the fibrillation of a short fiber (A) whose cross section takes a sea-island structure essentially composed of at least two polymers.

Abstract: The belts of the reinforcing structure of a pneumatic tire are reinforced with high strength, light weight aramid cords having a linear density of 420 to 1100 dTex, the cords having a twist of 315 to 551 TPM (8 to 14 TPI). In alternative embodiments, overlay material may be incorporated into the belt reinforcing structure. An illustrated embodiment of the tire has a belt reinforcing structure comprising a folded belt folded around a cut belt.

Abstract: A pneumatic race tire has an elastomeric casing with a tread in the crown portion thereof, a pair of bead areas and a body ply carcass extending continuously between the bead areas and through the sidewalls and crown portion. A continuous thin annular band formed of a high strength, lightweight material such as metal, fiberglass, a composite material or the like is located radially inwardly of the tread and between the tread and body ply carcass to enhance tire performance by reducing the thickness of the tread area.

Abstract: A pneumatic tire comprises at least one carcass ply of textile cords and a belt comprised of two cross belt layers containing textile cords arranged at a cord inclination angle of 10-45° with respect to the equatorial plane, in which a difference of cord inclination angle between the two cross belt layers with respect to the equatorial plane of the tire is within a range of 5-35° in the widthwise direction, and is mounted onto at least either left-side or right-side front wheel of a four-wheeled vehicle.

Abstract: A motorcycle tire comprises a tread portion curved convexly such that the maximum cross section width TW of the tire lies between the tread edges, a carcass ply of cords arranged radially at an angle of 70 to 90 degrees to the tire equator, and a belt ply of at least one cord laid at an angle of 0 to 35 degrees disposed radially outside the carcass ply in the tread portion. When the tire is mounted on a standard rim and inflated from 10% of a standard inner pressure to 100% thereof, the tread portion swells such that the amount of swelling is larger in a shoulder region than a crown region of the tread portion. The carcass cord tension Tcs in the shoulder region is 2.0 to 3.8 times the carcass cord tension Tcc in the crown region, and the belt cord tension Tbs in the shoulder region is 1.2 to 2.0 times the belt cord tension Tbc in the crown region.

Abstract: A tire for two-wheeled vehicles is described, said tire having a transverse curvature coefficient with a value of not less than 0.15, comprising a torus-shaped carcass having structural means which allow improvements in the handling of the vehicle, while leaving unchanged the other performance characteristics, in particular the comfort. These structural means consist in at least one ply of a rubberized fabric provided with textile cords having a count of between 420/2 and 840/2 dtex and a modulus of elasticity of between 100,000 MPa/cm and 200,000 MPa/cm. Preferably the carcass comprises a pair of these rubberized fabric plies reinforced with PEN cords.

Abstract: A pneumatic radial tire comprises a radial carcass, a cross belt comprised of at least two belt layers, a belt reinforcing member arranged adjacent to the belt and comprised of at least one belt reinforcing layer containing a reinforcing element embedded therein and extending in a circumferential direction while bending in form of wave or zigzag, and a tread rubber, in which the widthwise outer end of the belt reinforcing member is located outward from the widthwise outer end of the widest-width belt layer, or a belt protection member is disposed in the neighborhood of the belt so that the widthwise outer end of the belt protection member is located outward from the widthwise outer end of the belt reinforcing member in a widthwise direction of the tire.

Abstract: The tire has a single layer of cushion compound between the cords of the carcass reinforcement that are furthest radially outward in the crown and the cords of the belting that are furthest radially inward in the crown. The single layer of cushion compound may have either a high modulus of elasticity of between 7 and 25 MPa for high crown rigidity or a low modulus of elasticity of less that 6 MPa for reduced hysteresis energy loss.

Abstract: A band element for mounting in the crown portion of a pneumatic tire to provide run flat ability to the tire in the event of loss of air pressure and to provide increased puncture resistance is formed of flat strips of tape having fibers embedded in a resin matrix which in one embodiment are twisted and then pultruded to provide a rectangular cross sectional configuration. The twisted tape is wrapped about a mandrel and forms either the only layer, or the intermediate layer of a composite band in combination with inner and outer layers of flat tape or wound filament fibers, whereby the fibers in the tape extend across the central axis of the band to reduce interlaminar sheer. In another embodiment, a plurality of dimples or depressions are formed in the individual tape layers to extend a plurality of the fibers across the layer boundaries to reduce interlaminar sheer.

Abstract: A heavy duty radial tire has an aspect ratio of not more than 80% and comprises a radial carcass; a belt comprising a first ply, a second ply and a third ply disposed in this order from the radially inside to the outside; the second ply being widest and the axial width BW thereof being in the range of from 1.00 to 2.00 times the section height H of the tire; a first rubber thickness d1 measured from the first belt ply's edge to the carcass being in the range of from 1.0 to 5.0 mm; a second rubber thickness d2 measured from the third belt ply's edge to the second belt ply being more than the first rubber thickness d1; an axial distance W1 of the first belt ply's edge from the second belt ply's edge and an axial distance W2 of the third belt ply's edge from the second belt ply's edge satisfying the following condition: 0<=W1-W2<=5.

Abstract: A pneumatic tire 10 for use in aircraft landing applications is provided. The tire includes a breaker assembly 20, 20A, 20B having circumferentially extending layers of cord fabric and wear strips to enhance performance. In one embodiment, the wear strips are rubber and are provided as central portions 26, 44 of breaker layers 24, 40 with cord fabric extensions 30, 48 on either side. In a second embodiment, the wear strips are thin, narrow rubber strips 72 imposed between adjacent cord fabric breaker layers 56, 60, 64, 68. In a third embodiment, the wear strips are narrow cord fabric strips 92 imposed between adjacent cord fabric layers 80, 84, 88.

Abstract: In a heavy duty pneumatic radial tire, at least one carcass layer is provided between right and left bead portions and at least two belt layers formed of steel cords which exhibit a breaking elongation of 4% or less are arranged in an outer periphery of the carcass layer in a tread portion. The belt layers are composed of at least one upper belt layer (A) and at least one lower belt layer (B). The upper belt layer (A) has a belt width that is 0.6 times or less a carcass line maximum width SW of the carcass layer at a tire section and the lower belt layer (B) has a belt width such that both end portions thereof extend to tread shoulder portions. An inclination angle of the steel cords of the lower belt layer (B) relative to a tire circumferential direction is set to be larger than that of the upper belt layer (A). A ratio (Mb.sub.2 .multidot.N.sub.2)/( Mb.sub.1 .multidot.N.sub.1) of a product of a bending rigidity Mb.sub.2 per steel cord of the lower belt layer (B) and the number N.sub.

Abstract: A method for building a run flat pneumatic tire by precoating a thin high strength annular band of material with a layer of rubber to form a rubber/band composite. The rubber coated band composite is at least partially cured and then assembled between a body ply carcass and a tread package in a usual second stage tire building machine. The band can be encased completely with the rubber or the rubber can be applied only to the outside surface, the inside surface or the end edges of the band or any combination thereof.

Abstract: The belt of a pneumatic tire is a laminate of a circumferential belt layer and an inclined belt layer, the circumferential belt layer comprising a plurality of reinforcing elements arranged substantially in parallel with the equatorial plane of the tire and coated with rubber, and the inclined belt layer comprising a plurality of reinforcing elements inclined with respect to the equatorial plane of the tire and coated with rubber, wherein at least in the coating rubber of the circumferential belt layer and the coating rubber of the inclined belt layer adjoining each other, the modulus of elasticity of the coating rubber of the circumferential belt layer is lower than that of the coating rubber of the inclined belt layer. The pneumatic tire of the invention avoids the disadvantage generated by addition of a circumferential belt layer while strengthening the circumferential rigidity by the circumferential belt layer.

Abstract: A reinforcement ply for an elastomeric article comprises a plurality of parallel extensible reinforcing members laid at a substantially constant end count perpendicular to their longitudinal direction, the ply having different extensibilities in the longitudinal direction of the reinforcing members in different parts of the ply. The reinforcing members are preferably made such that they each have at least one filament which is displaced perpendicularly from the longitudinal centerline of the reinforcing member in one part of the reinforcing member compared to another part. A tire may include the reinforcement ply as a hoop or band in the ground contacting tread region.

Abstract: A tire having an Heterologous/S form ratio of at least 0.50, having a rad carcass reinforcement (1) and crown reinforcement (3) composed of at least two working crown plies (31,33) made of inextensible metal cables, crossed from one ply to the next, forming angles of between 10.degree. and 45.degree. with the circumferentail direction, and of an additional ply (32) which is axially continuous and formed of metallic elements oriented substantially parallel circumferential direction. Said ply (32) over the working ply (31) radially closest carcass reinforcement (1,) and the ratio of its rigidity of extension per unit of width to the total of the rigidities of extension of the other plies of the crown reinforcement being between 0.35 and 0.70.

Abstract: A tire with radial carcass reinforcement 1, having a crown reinforcement 3 aving at least two working crown plies 32, 34 made of inextensible cables, crossed from one ply to the other and forming angles of between 10.degree. and 45.degree. with the circumferential direction, characterized in that in the absence of any ply formed of inextensible cables forming an angle greater than 45.degree. with the circumferential direction, an additional, axially continuous, ply 33 formed of metallic elements oriented substantially parallel to the circumferential direction, is placed radially between the working plies 32, 34, having an axial width L.sub.33 at least equal to 1.05 times the axial width of the widest working crown ply L.sub.32, L.sub.34.

Abstract: A heavy duty pneumatic radial tire comprises a radial carcass extending between a pair of bead cores, and a belt comprised of three rubberized cord layers, among which cord layers an innermost cord layer and a middle cord layer being laminated to form a cross belt layer by crossing cords of these cord layers with each other with respect to a plane including a circumference of the tire, in which an inclination cord angle with respect to the plane in the innermost cord layer and the middle cord layer is within a given range, and cords in an outermost cord layer have a given inclination cord angle as measured from the plane toward a direction of measuring the inclination cord angle of the middle cord layer, and a coating rubber for the outermost cord layer has a given modulus of elasticity.

Abstract: A pneumatic radial tire comprises a breaker-belt disposed radially outside a carcass, and a band-belt disposed radially outside the breaker-belt and having organic fiber cords laid in substantially parallel with the tire equator. In the meridian section of the tire which is mounted on a standard rim and inflated to 0.5% of a standard inner pressure, the tread has a triple radius profile and the band-belt having a variable ply number accommodated to the triple radii of the tread such that the number of plies throughout more than sixty percent (60%) of the axial width of the parts of the tread having the first, second and third radii of curvature, respectively, are different from each other. The tread profile is composed of a central part of a radius R1, a pair of middle parts of a radius R2, and a pair of shoulder parts of a radius R3. For example, the ply number N1 in the central part is 0, the ply number N2 in the middle parts is 1, and the ply number N3 in the shoulder parts is 2.

Abstract: A high-transverse-curvature tire (1), in particular to be mounted on the front wheel of a motor-vehicle, comprises a belt structure (6) including, in a radially external layer (9a), a plurality of circumferential coils (7a), axially arranged side by side, of a cord (7) wound at a substantially zero angle with respect to the equatorial plane (X--X) of the tire. The area occupied by rubber blocks (10) formed in a portion of the tread band (8) having a length equal to the pitch (p) of the tread pattern and a width equal to the axial development of the tread band (8), is between 70% and 90% of the total area of said portion.

Abstract: A metallic cord for the reinforcement of elastomers has a 4+3 construction wherein the diameter of each filament ranges from 0.35 to 0.50 mm. The lay length of the four filaments in the core may be infinity. A pneumatic tire has a belt structure of at least two radially overlapped layers of elastomeric materials reinforced with metallic cords, each metallic cord of at least one of the layers being the 4+3 metallic cord.

Abstract: The present invention is an improved tire design including a continuous annular band or a belt formed of a plurality of relatively flat rigid plates embedded in the rubber between the tread and body plies. The plates are curved to conform to the radius of the tire and are pivotally linked or otherwise pivotally connected together thereby creating a flexible annular belt that is extremely stiff in the in-plane or steering torsional direction due to the engagement of the side edges of the adjacent plates when experiencing an in-plane or steering torsional force but flexible in the radial direction due to the pivotal connection between the adjacent plates.

Abstract: A pneumatic tire for heavy duty use comprises at least one radial carcass ply, a tread portion disposed radially outwardly of the crown region of the carcass plies and a crown reinforcing structure interposed between the tread portion and the crown region of the carcass plies. The crown reinforcing structure includes a belt assembly having at least a first, radially innermost and a second, radially outermost belt ply. The cords reinforcing the belt plies are preferably made of PET or PEN and have a linear density comprised between 2000 and 16000 Denier, a twist comprised between 2 and 7 TPI and a twist multiplier comprised between 3 and 5.

Abstract: Composites of high melting point thermoplastics such as polyphenylene sulfide or polyimide and high modulus fibers such as carbon, graphite, or boron can be bonded to rubber using a primer such as a metal primer. The composite desirably has a modulus of elasticity of at least 750,000 psi and can be used as a belt in a no-flat tire.

Abstract: A pair of high-transverse-curvature tires for two-wheeled vehicles is provided, in which the belt structure of the rear tire comprises a layer of inextensible cords disposed at a substantially zero angle with respect to the equatorial plane of the tire, preferably wound on a sheet of elastomeric material reinforced with aramid pulp, whereas the belt structure of the front tire comprises at least one radially outer layer of inextensible cords disposed at a substantially zero angle with respect to the equatorial plane of the tire and distributed with an axially variable density, and preferably another reinforcing layer at a radially underlying position. The zero-degree cords preferably are metallic cords of the high-elongation type, made of high-carbon steel.

Abstract: A pneumatic radial tire for passenger car comprises a circumferential belt layer in addition to a slant belt layer, in which specified PET, nylon, PEN or vinylon fiber cords or steel cords are used in the circumferential belt layer.

Abstract: A pneumatic tire having two main grooves in the tread that are provided symmetrically with the equatorial plane of the pneumatic tire and which extend in the circumferential direction of the pneumatic tire. The tread is divided into a central portion formed between the main grooves and shoulder portions formed outward of the main grooves in the direction of tire's width. Each of the central and shoulder portions is provided with a plurality of lateral grooves that extend in the direction of tire's width. The lateral grooves in the central portion and those in each shoulder portion are inclined in opposite directions with respect to the axial direction of the tire. All walls of the central lateral grooves are inclined in the same direction with respect to a line in the radial direction of the tire. All walls of the shoulder lateral grooves are inclined in opposite directions to the walls of the central lateral grooves with respect to a line in the radial direction of the pneumatic tire.

Abstract: The tire of this invention has a belt package with a combination of a steel refinforced inner belt ply and an aromatic polyamide reinforced outer belt ply. The strength per unit width of the aromatic polyamide reinforced ply is made to be within 30 percent greater than the strength per unit width of the steel reinforced belt ply. The tire of this invention has angles of the aromatic polyamide reinforcing members from the mid-plane greater than the angles of the steel reinforcing members from the same mid-plane by 1 to 8 degrees. High impact endurance values are disclosed to be a function of the difference in bending stiffness values for each ply as well as a function of the composite shear stiffness values.

Abstract: The pneumatic radial tire comprises a carcass made of a ply of radially arranged cords toroidally extending between a pair of bead portions, a belt arranged outside the carcass in a radial direction of the tire, and a belt reinforcing layer of organic fiber cords arranged outside the belt in the radial direction of the tire, in which the organic fiber cord constituting the belt reinforcing layer has a strand construction and a twisting coefficient N.sub.t of 0.06-0.30 defined according to the equation.N.sub.t =T.times.(0.139.times.D/2.rho.).sup.1/2 .times.10.sup.-3 (1)whereinT: twisting number (turns/10 cm),D: total denier,.rho.: specific gravity (g/cm.sup.3).

Abstract: A tire for motor vehicles includes a belt structure (3) which has consecutively overlapped first and second belt strips (5, 6) and a pair of side straps (7) overlying the second belt strip (6) adjacent to the side edges (6a) of the second belt strip. Each side strip (7) is made up of at least one cord circumferentially wound in a plurality of coils to form two radially superposed layers of coils disposed in axial side by side relation. The first belt strip (5), located adjacent to the carcass structure (2), substantially has the same width as the tread band (4), and laterally projects from the second belt strip (6) radially overlapped therewith. The second belt strip (6) has side flaps (6b) projecting from the side straps (7) and spaced apart from the first belt strip (5) by a spacing which progressively grows with distance away from the outer edges (7a) of the side straps themselves.

Abstract: A front tire for-wheeled vehicles comprising a carcass of toric form having a high transverse curvature and provided with a central crown and two sidewalls terminating in a pair of beads for anchoring to a corresponding mounting rim, a tread band located on the crown and a circumferentially-inextensible belt structure disposed between the carcass and tread band. The belt structure at a radially external position is comprised of a layer of cord coils substantially disposed at a zero angle to the equatorial plane of the tire in axial side-by-side relationship and extended from one axial extremity of the belt to the other axial extremity of the belt. The winding thickness of the cord coils increasingly grows from the equatorial plane to the belt axial extremities.

Abstract: At least one reinforcing rubber layer is provided in the part of each of two side wall portions which is on the outer side of a carcass layer. The outer circumferential end portions of the reinforcing rubber layers extend to positions in which they are disposed between the end portions of the innermost belt layer and the corresponding portions of the carcass layer, while the inner circumferential end portions of these rubber layers extend inward in the radial direction of the tire so as to overlap the bead fillers in positions on the outer sides of the end portions of the carcass layer in the widthwise direction of the tire. A 100% modulus at 100.degree. C. of the rubber constituting the reinforcing rubber layers is not higher than that of the rubber of the belt layers, and a dynamic elastic modulus at 20.degree. C. of the former rubber in the range of 10-40 MPa.

Abstract: A run flat pneumatic tire is reinforced by a thin annular composite band imbedded in the crown portion of the tire in combination with a plurality of radial cords or plies in its sidewalls which have freedom in shear with respect to one another. The band is formed by a plurality of layers of material strips wherein each strip is wound in a helical pattern, with adjacent strips being wound at reverse angles to each other. Each layer is formed under sufficient pressure and at an elevated temperature whereby the band is prestressed in tension which decreases the maximum stress at the footprint area of the tire. The invention furthermore incorporates the method of imparting the prestress on the annular band during its manufacture.

Abstract: A pneumatic vehicle tire comprises a carcass, a tread strip, and a breaker arrangement arranged between the carcass and the tread strip. The breaker arrangment includes at least two breaker plies which have threads or cords which serve as load-carrying members and extend at an angle to the mid-circumferential plane of the tire. A breaker cover surrounds the breaker arrangement at least in the region of the breaker arrangement's axial side edges. The breaker cover has at least one cover ply consisting of threads or cords which extend at least substantially in the circumferential direction of the tire. The breaker cover is formed of a helically wound strip bandage. At least one respective ply separating cushion layer is present in each of the two axial side regions of the breaker arrangement.

Abstract: The tire of this invention has a belt package with a combination of a steel refinforced inner belt ply and an aromatic polyamide reinforced outer belt ply. The breaking strength, tensile modulus, secant modulus and other material properties for the reinforcing members in each belt ply are defined. The strength per unit width of the aromatic polyamide reinforced ply is made to be within zero to 30 percent greater than the strength per unit width of the steel reinforced belt ply. The tire of this invention has angles of the aromatic polyamide reinforcing members from the mid-plane greater than the angles of the steel reinforcing members from the same mid-plane by 1 to 8 degrees. High impact endurance values are disclosed to be a function of the tensile modulus, breaking strengths and belt ply widths for each ply as well as a function of the composite shear stiffness values.