Abstract: A tire can include a pair of beads, a carcass, an inner liner, and an insulation located between the carcass and the inner liner. The carcass can include one carcass ply. The carcass ply can include a plurality of carcass cords and a topping rubber. Each carcass cord can have a total fineness of not less than 6000 dtex and not greater than 9000 dtex. The insulation can be located between first and second beads. A ratio (ta/td) of a thickness to of the topping rubber located between the insulation and the carcass cords to a thickness td of the insulation can be not less than 0.2 and not greater than 0.6.

Abstract: A pneumatic tyre includes a pair of bead portions having respective bead cores therein, each bead core defining a core innermost end in a tyre radial direction, and an inner liner having an air-impermeable property and extending between the pair of bead portions, wherein in each of the pair of bead portions, the inner liner comprises an innermost end in the tyre radial direction located inwardly of the core innermost ends in the tyre radial direction, and the pair of bead portions has a bead base diameter being less than 99.7% of a rim diameter of a standard wheel rim on which the pneumatic tyre is to be mounted.

Abstract: A pneumatic tire is mounted on a 5° rim. A bead core includes a bottom inclined 0°-5° in a direction in which the bottom diverges outward in the radial direction as the bottom extends from an inner side toward an outer side in the width direction. A bead includes a base, a toe, a heel, and a back surface. The heel connects to the back surface by an arc. The base includes a region between a core lower inner end position on an inner circumferential surface of the bead and being identical to a position of a bead core inner end and a core lower outer end position on an inner circumferential surface of the bead and being identical to a position of a bead core outer end in the width direction. The base has a curved line projecting toward the inner side in the radial direction in a cross-section.

Abstract: A tire 22 includes a pair of bead portions 66 to be fitted to a rim R. Each bead portion 66 includes a bead 30 having a core 52 and an apex 54. An outer surface 68 of the bead portion 66 includes a seat face 70 and a flange face 72 disposed radially inward and axially outward, respectively, of the bead 30, a heel face 74 disposed between the seat face 70 and the flange face 72, and a plurality of vent lines 78 projecting from the heel face 74 and extending in the circumferential direction. A contour of the heel face 74 is represented by an arc on a cross-section, of the tire 22, taken along a plane including a rotation axis of the tire 22, and a radius Rh of the arc is not less than 8 mm and not greater than 15 mm.

Abstract: A pneumatic tire includes bead portions, each having a bead bottom surface. The bead bottom surface includes a toe-side portion extending axially outwardly from a bead toe at an angle ? in a range of from 17 to 24 degrees with respect to the tire axial direction, a heel-side portion positioned axially outside the toe-side portion and extending axially outwardly at an angle ? in a range of from 3 to 7 degrees with respect to the tire axial direction, and a heel-side arc portion smoothly connecting between the heel-side portion and a flange contacting surface with a radius of curvature (R) in a range of from 1.5 to 3.5 mm.

Abstract: A back surface part (13) is arranged on an inner surface (35) facing an inner side of a rim flange part (32) in a tire width direction (H) or arranged closer to the inner side in the tire width direction (H) than the inner surface (35), in a no-load reference state where a pneumatic tire (10) is mounted on an applied rim (30) and the internal pressure of the pneumatic tire (10) is set to atmospheric pressure, and a flat surface part (20) extending linearly along a tire radial direction (R) in the reference state is formed in a connecting portion of the back surface part (13) connected with a heel part (14), thereby making it possible to prevent a large force from acting thereon from the applied rim (30) and to improve uniformity.

Abstract: A pneumatic tire, comprising: a carcass provided in a toroidal shape across a pair of bead cores; a bead filler provided on the outer side in the tire radial direction of each bead core; and a rim guard to protrude on the outer side in the tire width direction for rim protection, wherein a contour of a portion of the rim guard has radius of curvature in the range of 5 mm to 40 mm in a widthwise cross section of the tire, and provided that “1CSH” represents a distance in the tire radial direction between the innermost end and the outermost end of the carcass, a distance in the tire radial direction between the outermost end in the tire width direction of the rim guard and the outermost end in the tire radial direction of a bead filler is in the range of ?0.2CSH to 0.05CSH.

Abstract: A vehicle wheel including a wheel rim having first and second sidewalls defining a rim trough and an opening extending through a portion of the wheel rim, a tire having a tire bead positioned in the rim trough in engagement with the first sidewall, and a bead lock positioned in the rim trough adjacent the tire bead. The bead lock is movable between a locked position and an unlocked position. The bead lock includes an actuator positioned in the opening with a portion accessible from outside the rim, and a hand positioned in the rim trough with two free ends moveable relative to each other and a side edge engaged with the tire bead. The side edge includes a cut out that creates a recessed edge that is not engaged with the tire bead.

Abstract: A wheel including a tire and a rim wherein the tire includes: a pair of beads, each of the beads being provided with a base, wherein the rim includes a pair of axially outer flanges defining respective bead housing seats, each of the bead housing seats including a base portion, and wherein the base of at least one of the beads and the base portion of the respective bead housing seat are mutually coupled by means of at least one mechanical coupling element, wherein the mechanical coupling element is provided with parts and has a length greater than its width, the length being lower than the circumference of the tire measured at the base of the bead and the width being lower than the axial width of the base of the bead and of the base portion of the respective bead housing seat.

Abstract: A cycle wheel with an axis of rotation and having a median plane perpendicular to the axis, the wheel comprising a rim and a pneumatic tire, in which: the rim includes an upper bridge and at least one left lateral flange extending from the upper bridge and extending radially outward so as to move away from the axis, the upper bridge including a stop positioned on the same side as the left lateral flange in relation to the median plane, so that the left lateral flange and the stop demarcate a left channel, the left channel having, along a radial plane, an opening having an amplitude, a length greater than the opening, the pneumatic tire comprising a casing and at least one non-deformable left bead which, along a radial plane, has a length, a thickness less than the length of the bead, the length of the bead being greater than the amplitude of the opening, the thickness of the bead being less than or equal to the amplitude of the opening; the surface area of the bead cross section being less than the surface ar

Abstract: A pneumatic tire for a cycle wheel comprising a casing and two beads positioned on respective ones of lateral sides of the casing, the pneumatic tire having the shape of an open torus and defining an inner volume, at least one of the two beads having a shoulder projecting outward of the portion of the casing adjacent thereto, and a support positioned along a radial plane at a second end of the bead, the shoulder being positioned along a radial plane at a first end of the bead and comprising, on its outer surface, a first support surface and an edge, the first support surface being positioned between the edge and the casing, and the support surface being set back with respect to the edge. In a radial plane, the normal direction of the first support surface is substantially tangent to the casing, the support comprising a second support surface positioned on the inner side.

Abstract: Pneumatic vehicle tire, in particular a run-flat tire, having a carcass, a tread, and two tire beads, having a respective bead core, which are provided for fixing the tire in an associated wheel rim by the fact that the beads overlap with the associated wheel rim. According to the invention, to avoid relative motion between the tire bead and the wheel rim when the tire is subjected to impact load, the bead is designed in such a way in the nonloaded state mounted on the wheel rim the bead does not overlap with the wheel rim in the contact region of the wheel rim flange above the bead core.

Abstract: A tire and wheel rim assembly comprising a wheel rim having flange portions and ledge portions, wherein each ledge portion has at least one circumferentially continuous groove with a circumferentially continuous surface. The assembly further includes a tire having bead regions comprising a ledge portion having a toe, a heel, and at least one circumferentially continuous rib with a peak, wherein the at least one circumferentially continuous rib of the tire extends radially into the at least one circumferentially continuous groove of the wheel rim.

Abstract: A pneumatic tire includes a carcass ply extending from one bead structure to another bead structure. Each bead structure includes a plurality of circumferentially wound metal wires defining a cross-sectional profile of a bead. The profile has a radial height to axial width ratio greater than 1.0 and a bead orientation angle between 30 degrees and 60 degrees.

Abstract: A pneumatic tire has a carcass structure extending through a pair of opposing bead portions and an inner liner located inward of the carcass structure, each bead portion comprising a bead core about which is wrapped the carcass structure and a toeguard. Each bead portion has a bead toe, a bead base, and a bead heel, the bead base extending between the bead toe and the bead heel. The bead heel has a profile corresponding to a sector of an ellipse or approximates a sector of an ellipse by having a dual radius structure. The bead base may have a dual taper configuration. The bead core may be substantially centered in the bead portion, as determined by the material thickness at three locations about the bead core.

Abstract: A tire includes a rim protector (20) positioned on an outside in an axial direction of a sidewall. The rim protector (20) includes a main portion (34), an outer portion (36) and an inner portion (38). The main portion (34) has a large number of blocks (44). The blocks (44) are arranged in a circumferential direction. The main portion (34) further has a first slit (46), a second slit (48) and a large number of third slits (50). The first slit (46) is extended in the circumferential direction. The second slit (48) is extended in the circumferential direction. Each of the third slits (50) is extended in a radial direction. The third slit (50) reaches the second slit (48) from the first slit (46). Each of the blocks (44) is surrounded by the first slit (46), the second slit (48) and two of the third slits (50).

Abstract: A method for manufacturing a tyre includes: assembling an unvulcanized tyre, the tyre including a crown, a first sidewall and a first bead, a second sidewall and a second bead, and a carcass reinforcement, each bead including a seat; and vulcanizing the unvulcanized tyre in a mould having an asymmetric configuration in order to obtain a vulcanized tyre, wherein the mould is such that, when the tyre is placed in the mould, in any meridian section, the seat of the first bead has an angle ?1 with a rotation axis A and the seat of the second bead has an angle ?2 with the rotation axis A, such that ?1??23, with the angles ?1 and ?2 being expressed in degrees, with the angles ?1 and ?2 being defined, for each bead, relative to an axis Ox and Ox? parallel to the rotation axis A oriented positively towards outside of the tyre, and with the angles ?1 and ?2 being positive when extending radially outwards.

Abstract: A tire comprising a circumferential tread, a circumferential tread, at least one circumferential belt, at least one carcass ply, a pair of sidewalls, and a pair of bead portions. Each of the bead portions comprising a bead core, a bead filler, a toe region, a heel region, a ledge region, and a flange region. The ledge region is provided between the toe region and the heel region, wherein the ledge region comprises at least one circumferentially continuous groove. The flange region each extending circumferentially about the tire, the flange region provided radially above the ledge region, wherein the flange region comprises at least one circumferentially continuous groove.

Abstract: An object of the present invention is to provide a heavy-duty pneumatic tire that is capable of suppressing deterioration by oxidation at a portion of a high heat generation in a bead portion, and that is excellent in sustainability of inner pressure holding performance as well as in durability. The heavy-duty pneumatic tire of the present invention includes a carcass and an inner liner disposed closer to the center of the tire than the carcass.

Abstract: A wheel including a tyre and a rim wherein the tyre includes: a pair of beads, each of the beads being provided with a base, wherein the rim includes a pair of axially outer flanges defining respective bead housing seats, each of the bead housing seats including a base portion, and wherein the base of at least one of the beads and the base portion of the respective bead housing seat are mutually coupled by means of at least one mechanical coupling element, wherein the mechanical coupling element is provided with parts and has a length greater than its width, the length being lower than the circumference of the tyre measured at the base of the bead and the width being lower than the axial width of the base of the bead and of the base portion of the respective bead housing seat.

Abstract: Tire having two beads, at least one bead 1 of which has a seat 11 inclined toward the outside, this seat 11 being extended axially and radially to the outside by a lateral part 12. This bead 1 includes an anchoring device formed from at least one circumferential bead reinforcing element 5 and from a wedge-shaped profiled element 7 made of a rubber compound. A radial carcass reinforcement 4 is anchored in each bead to the circumferential bead reinforcing element 5, this tire being characterized in that the outwardly inclined bead seat 11 includes at least one circumferentially continuous rib 9 making at least one complete revolution, said at least one rib 9 being located axially to the outside of a plane perpendicular to the axis of rotation of the tire and axially tangential to the outside of the circumferential bead reinforcing element 5 in order to create a continuous line of contact pressure equal to or greater than the inflation pressure of the tire.

Abstract: A tire comprising a circumferential tread, a circumferential tread, at least one circumferential belt, at least one carcass ply, a pair of sidewalls, and a pair of bead portions. Each of the bead portions comprising a bead core, a bead filler, a toe region, a heel region, a ledge region, and a flange region. The ledge region is provided between the toe region and the heel region, wherein the ledge region comprises at least one circumferentially continuous groove. The flange region each extending circumferentially about the tire, the flange region provided radially above the ledge region, wherein the flange region comprises at least one circumferentially continuous groove.

Abstract: A mounted assembly of the tubeless type for a bicycle, includes a rim and a tire having beads. The rim includes two wings attached to two seats which receive the tire beads. A tire reception zone is formed between the wings. The rim and/or the tire includes a stabilizing structure for stabilizing the air pressure at the level of the tire's outer surface, in zones which are neither in contact with the ground nor in contact with the rim, to a value of less than 2 bar. The stabilizing structure enables air to be conducted from the tire to atmosphere if a bead loses contact with its seat. The stabilizing structure can be in the form of holes in the wings and/or the seats, or in the form of channels or projections disposed on the wings. Alternatively, the stabilizing structure can be in the form of projections formed on the tire sidewall and arranged to contact the wings.

Abstract: A pneumatic tire whose rim slip resistance and durability are improved by optimizing the shape of the bead base is provided. A polygonal bead core 3 having a bottom 2 extending generally along the tire width direction is embedded in a bead portion 1. The bead portion 1 has a bead base 6 extending between a bead heel 4 and a bead toe 5. A maximum displacement point 11 is within a range of 25% or less of the width w of the bottom of the bead core with the third base point 10. The interference ta at the maximum displacement point 11 is 1.1 to 1.3 times as much as the interference tb at the second base point 8. the bead base 6 extends at least between the bead heel 4 and the first base point 8 and has a first tapered portion 12 with a taper angle ?1 being identical with or greater by three degrees or less than a taper angle ?BS of a bead seat of the standard rim R.

Abstract: The present invention provides a run-flat tire provided with a reinforcing rubber layer 9 arranged in a side wall section 2 so as to be formed in a crescent cross sectional shape, an annular protrusion section 10 protruding to an outer side in a tire width direction from at least one of bead sections 1, and having an inner peripheral side surface 11 facing to an outer peripheral side curved surface of a rim flange 8a at a time of installing a specified rim, and an annular bead 1b arranged in the annular protrusion section 10, in which the run-flat tire is provided with a ridge section 23 connecting to an outer side in the tire width direction from an inner peripheral side surface 11 of the annular protrusion section 10 so as to protrude to an inner peripheral side of the tire, and having an inner diameter smaller than an outer diameter of the rim flange 8a, and a soft rubber layer 15 arranged in the ridge section 23 and having a corner section 16 tapered toward the tire inner peripheral side.

Abstract: A pneumatic tire has a carcass structure extending through a pair of opposing bead portions and an inner liner located inward of the carcass structure, each bead portion comprising a bead core about which is wrapped the carcass structure and a toeguard. Each bead portion has a bead toe, a bead base, and a bead heel, the bead base extending between the bead toe and the bead heel. The bead heel has a profile corresponding to a sector of an ellipse or approximates a sector of an ellipse by having a dual radius structure. The bead base may have a dual taper configuration. The bead core may be substantially centered in the bead portion, as determined by the material thickness at three locations about the bead core.

Abstract: A pneumatic tire to be mounted on a rim, comprises a pair of bead portions each having a bead core therein, wherein in a meridian section of the tire under a non-mounted state that the tire is not mounted on the rim but the bead portions are held such that the bead width is equal to the rim width of the rim, each bead portion has a profile comprising a bead base extending between a bead toe and a heel-side point, the bead base comprising an axial base width, a straight part extending from the bead toe toward the heel-side point having an inclination so that an extended line thereof passes through the heel-side point, a convex part provided between an axially outer end of the straight part and the heel-side point and protruding radially inside of the extended line, and the convex part having a radius of curvature of from 0.20 to 0.33 times the base width and a height from the extended line of from 0.067 to 0.13 times the base width.

Abstract: A pneumatic run-flat tire has a bead configuration wherein the axially inner end is radially inward of the axially outer end of the bead. The sidewall of the tire, from the bead region to the upper sidewall is reinforced to form a pillar support in the sidewall. The bead configuration and the pillar reinforcement enable the tire to lock itself onto a tire rim during low pressure operation and be self-supporting.

Abstract: A run-flat tire has a radial carcass reinforcement ply extending through a pair of opposing sidewalls and anchored in opposing bead portions. At least one of the bead portions having a bead heel and a bead toe wherein the bead heel is radially outward and axially inward from the bead toe. At least one of the bead portions has a bead composite and a bead apex therein. The bead composite has a maximum axial width WB, the axial width being measured perpendicular to the tire equatorial plane. The maximum axial width WB is greater than 50% of the maximum axial width W of the at least one bead portion, as measured from the opposing axial sides of the bead portion.

Abstract: Tire designed to be mounted on a mounting rim comprising rim seats 11 that are inclined outwards. This tire comprises beads 1 designed to come into contact with the mounting rim, each bead having a circumferential reinforcing element which serves to anchor to a carcass reinforcement, this element having a center of rotation about which this element is able to rotate while the bead is being mounted on the rim.

Abstract: Vehicle tire including two sidewalls, beads which include a seat and an external flange which are intended to come into contact with a suitable rim, and a carcass reinforcement structure. At least one bead comprises a circumferential cord structure distributed in two regions, and an anchoring region in which the reinforcement structure is anchored in the bead, that region including circumferential cords arranged as stacks distributed symmetrically on opposite sides of the reinforcement structure. The center of inertia of the bead is located in the immediate vicinity of the anchoring region.

Abstract: Disclosed are improved wheels and tires for simulating the appearance of larger-diameter wheels mounted within low-profile tires. The improved tires are intended to be mounted on wheels with an extended outer flange. An embodiment of the tire comprises an outboard tire wall, an inboard tire wall, a tread therebetween, a laterally extending wheel protector, a ledge, and a flange seat. The flange seat is optionally contoured to match the inner face of an outer flange of the improved wheel.

Abstract: A tire for a vehicle wheel, comprising two sidewalls joined at their radially outer portions by a crown zone, beads, a reinforcement structure extending substantially radially from each of the beads, towards the crown zone, at least one of said beads comprising: a bead seat of inverted type; an anchoring zone for the reinforcement structure in said bead, comprising an arrangement of circumferential cords comprising at least two stacks distributed on either side of the reinforcement structure, said reinforcement structure being arranged so as to obtain a circumferential distribution of the cords on either side of at least one of said stacks. In this manner, a supplementary adjustment means is obtained which makes it possible to produce arrangements in which the aim is as far as possible towards equilibrium or uniformity of the stresses. Numerous benefits obtained in terms of durability and reliability.

Abstract: A pneumatic tire comprises a pair of bead portions each having a bottom face and an axially outer side face which contact with a bead seat and a flange of a wheel rim, respectively, wherein the axially outer side face comprises a radially outer part for contacting with a radially outermost curved portion of the rim flange; and a radially inner part for contacting with a radially inner flat portion of the rim flange. In a meridian section of the tire, the radially inner part is a substantially straight line, and the radially outer part is (A) a substantially straight line or (B) convex line or (C) a curved concave line having a radius of curvature of not less than 300 mm, and the radially outer part extends radially outwards from the radially outer end of the radially inner part while inclining axially outwards.

Abstract: A tire comprising two sidewalls, beads, a reinforcement structure extending radially from each of the beads towards the crown zone, at least one of said beads comprising: a bead seat of inverted type; an anchoring zone for the reinforcement structure in said bead, comprising an arrangement of circumferential cords, a bonding mix being arranged between the circumferential cords and the reinforcement structure, said bonding mix of the anchoring zone having a elasticity modulus at a deformation of 10% of less than 20 MPa and preferably between 10 and 20 MPa; an axially outer zone arranged in the zone of the bead; a bearing zone for said bead. The anchoring rubber mix makes it possible, in spite of its rigidity which is very much less than what was advocated previously, to retain very satisfactory endurance properties.

Abstract: A pneumatic tire which comprises a tread portion, a pair of bead portions adapted to a wheel rim, a pair of sidewall portions therebetween, at least one of the sidewall portions provided with an axially protruding rim protector, the rim protector extending continuously in the tire circumferential direction so as to form an annular axially outer surface extending continuously in the tire circumferential direction and a radially inner surface extending radially inwardly from said annular axially outer surface towards the adjacent bead portion, wherein the radially inner surface is provided along the tire circumferential direction with at least one recess having a depth of from 0.5 to 7.0 mm.

Abstract: A tire has a carcass reinforcement extending between a pair of opposing bead portion. At least one of the bead portions terminates axially to the outside by a tip and is intended to be mounted on a wheel rim having a bead seat that has an axially outer end closer to the axis of rotation than the axially inner end thereof. Within the bead portion are a bead ring and a bead apex. The radial carcass reinforcement ply is anchored in each bead portion and has at least one terminal end located in the bead portion. In the bead portion, the reinforcement ply passing radially inward of the bead ring, extending axially outward of the bead ring. The reinforcement ply terminates without passing back under the bead ring.

Abstract: A tire comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each of the beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus, each circumferential alignment of the first reinforcing threads being, within each bead, bordered axially inwardly and axially outwardly by second reinforcing threads, oriented substantially circumferentially, of a modulus greater than or equal to that of the first reinforcing threads. The first reinforcing threads and second reinforcing threads are separated by a layer of mix of very high elasticity modulus. Considering ?RI as being the total of the rigidities of extension of the second reinforcing threads arranged axially inwardly relative to the carcass reinforcement and considering ?RE as being the total of the rigidities of extension of the second reinforcing threads arranged axially on either side of the carcass reinforcement, then: 0.

Abstract: A tire comprising a crown, two sidewalls and two beads, a carcass reinforcement anchored in each of the beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus, each circumferential alignment of the first reinforcing threads being, within each bead, bordered axially by second reinforcing threads oriented substantially circumferentially. The first reinforcing threads and the second reinforcing threads are separated by a layer of mix of very high elasticity modulus. The second reinforcements are arranged in a spiral and formed of monofilaments or unit threads of steel.

Abstract: A tire includes two beads and a carcass reinforcement anchored in the beads. The carcass reinforcement has at least two circumferential alignments of first reinforcing threads. Each such circumferential alignment is, within each bead, bordered axially inwardly and outwardly by second circumferential reinforcing threads having an elasticity modulus at least equal to that of the first threads. The first and second threads are separated by a rubber mix of high elasticity modulus. The outer surface of each bead includes a seat which includes an arc-shaped wall section having a geometrical center arranged axially outwardly relative to the bead. Considering an imaginary straight line passing through both the center and the bead at an angle ?=+45±5 degrees relative to the tire axis, all of the second threads are spaced from that axis by a radial distance no larger than the locus of the imaginary line.

Abstract: A tire for a vehicle wheel, comprising two sidewalls joined by a crown zone provided on its radially outer portion with a circumferential tread, a bead arranged at the radially inner portion of each of the sidewalls, each bead comprising a seat and an outer flange which are intended to come into contact with the rim. The bead seat has a generatrix, the axially inner end of which lies on a circle of diameter greater than the diameter of the circle on which the axially outer end is located. A carcass-type reinforcement structure extends substantially radially from each of the beads, along the sidewalls, towards the crown zone, such bead being reinforced by a substantially radial arrangement of circumferential cords arranged in stacks. A portion of the carcass-type reinforcement structure is arranged in the immediate vicinity of at least one portion of a stack, and the space between these portions is generally occupied by a rubber mix of high elasticity modulus.

Abstract: An aircraft tire, the inflation pressure of which is greater than 12 bar, comprises a crown, two sidewalls and two beads, a carcass reinforcement anchored in the two beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus. The means for anchoring the first reinforcing threads within each bead comprises second reinforcing threads oriented circumferentially and axially bordering the circumferential alignments of the first reinforcing threads, the first reinforcing threads and second reinforcing threads being separated by a layer of mix of very high elasticity modulus.

Abstract: The present invention relates to a pneumatic tire, specifically to improvements to the bead region of tires designed for runflat operations. The improvements comprise the addition of cavities or indentation (126) on the surface of the bead (127) that contacts the wheel rim (128). In a first embodiment a series of circular cavities (126) are located on the radial innermost surface of the bead in the proximity of the bead toe. In a second embodiment, a continuous groove-like torus cavity (226) is located in the radially innermost surface of the bead in the proximity of the bead toe. The series of cavities or torus cavity increase the adherence of the bead to the rim as a small volume of air at a low pressure, significantly inferior to the atmospheric pressure (air vacuum situation) is trapped in the void spaces created by the cavities or torus cavity and the bead seat.

Abstract: A pneumatic tire has a carcass structure extending through a pair of opposing bead portions and an inner liner located inward of the carcass structure, each bead portion comprising a bead core about which is wrapped the carcass structure and a toeguard. Each bead portion has a bead toe, a bead base, and a bead heel, the bead base extending between the bead toe and the bead heel. The bead heel has a profile corresponding to a sector of an ellipse or approximates a sector of an ellipse by having a dual radius structure. The bead base may have a dual taper configuration. The bead core may be substantially centered in the bead portion, as determined by the material thickness at three locations about the bead core.

Abstract: A tire P with a radial carcass reinforcement (1), intended for mounting on a rim J at least one of whose seats (42) is inclined outwards and is extended axially on the outside by a hump (41) of small height, said hump comprising an axially outer wall (411), and comprising two sidewalls (8) and at least one bead (5) with a heel axially on the inside and a bead toe axially on the outside, said bead (5) being provided with a protective rib T extending in the circumferential direction and axially further away from the equatorial plane than the axially outer wall (411) of the hump (41) of the rim in order to protect said rim J, the profile of the lower face BC connecting the axially outer face AB of the protective rib T and the profile of the bead (5) being totally located radially outside a virtual segment whose ends are on the one hand the radially innermost point B of the axially outer face AB of the rib T, and on the other hand the last point C? of the tire bead which is in contact with the hump of the rim.

Abstract: A pneumatic tire (10) has a tread portion (11), a pair of sidewall portions (13) and a pair of bead portions (14). Each bead portion (14) has a bead core (15), and each bead core (15) has a radially inner surface defining a bead core base (31). Radially inward of, and wider than, each bead core base (31) is a bead seat profile (20). The bead seat profile (20) provides an interference fit between the tire (30) and the ledge (42) of the wheel rim (40) to which the tire (10) is to be mounted. The bead seat profile (20) has at least two portions which are inclined at specific angles with respect to the radially inner surface of the bead core base The radially inner base (31) of the bead core (15) is substantially parallel to the bead seat profile.

Abstract: A tire apparatus for driving a vehicle allows the vehicle to be driven during periods of both low tire pressure and normal tire pressure. The tire apparatus has a tire that has a tread section. The tire has a pair of side walls that are located adjacent to the tread section. A first bead is located at an end of one of the side walls, and a second bead is located at an end of the other side wall. A wheel is also present that has a rim with a first bead seat and a second bead seat. The wheel is configured for attachment to the vehicle. The wheel has a support member for engaging the tire during periods of low tire pressure. At least one of the first and second bead seats has a plurality of friction members to prevent relative rotational movement between the tire and the rim.

Abstract: A tire P with a radial carcass reinforcement (1), intended for mounting on a rim J at least one of whose seats (42) is inclined outwards and is extended axially on the outside by a hump (41) of small height, said hump comprising an axially outer wall (411), and comprising two sidewalls (8) and at least one bead (5) with a heel axially on the inside and a bead toe axially on the outside, said bead (5) being provided with a protective rib T extending in the circumferential direction and axially further away from the equatorial plane than the axially outer wall (411) of the hump (41) of the rim in order to protect said rim J, the profile of the lower face BC connecting the axially outer face AB of the protective rib T and the profile of the bead (5) being totally located radially outside a virtual segment whose ends are on the one hand the radially innermost point B of the axially outer face AB of the rib T, and on the other hand the last point C′ of the tire bead which is in contact with the hump of the r

Abstract: A pneumatic tire comprises a pair of bead portions each having a bottom face and an axially outer side face which contact with a bead seat and a flange of a wheel rim, respectively, wherein the axially outer side face comprises: a radially outer part for contacting with a radially outermost curved portion of the rim flange; and a radially inner part for contacting with a radially inner flat portion of the rim flange. In a meridian section of the tire, the axially outer side face is provided with a profile such that the radially inner part is a substantially straight line, and the radially outer part is (A) a substantially straight line or (B) a convex line or (C) a curved concave line having a radius of curvature of not less than 300 mm, and the radially outer part extends radially outwards from the radially outer end of the radially inner part while inclining axially outwards.

Abstract: A method of manufacturing a tire for a vehicle wheel includes making a carcass structure, applying a belt structure to the carcass structure, applying a tread band to the belt structure, and applying at least one pair of sidewalls to the carcass structure. Making the carcass structure includes applying at least one first part of the at least one carcass ply on a toroidal support, applying at least one circumferentially-inextensible annular anchoring insert, and applying at least one stiffening element. The at least one annular anchoring insert includes a cross-sectional profile of flattened conformation, extending away from an equatorial plane of the tire. The at least one stiffening element includes at least one main portion with a cross-sectional profile tapering away from a rotation axis of the tire. The at least one main portion is located substantially at an axially-inner position relative to the at least one annular anchoring insert.