Abstract: A tire (1), a mounting rim (2) therefor and a circumferentially unstretchable ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the supporting ring (3) and a rim flange (24).

Abstract: A low pressure all terrain vehicle tire 10 features a strapped bead core 20 which comprises distinct layers 30, 32, 34, 36 of filaments 26 positioned relative to one another. The bead core 20 has a substantially square or rectangular cross-section and a radially inward substantially flat base side 44, a radially outermost side 46, an axially inward first side 48, and an axially outward second side 50. The first side 48 intersects the base side 44 at a first edge 54 and forms thereby an included angle .alpha.. The second side 50 intersects the base side 44 at a second edge 56 and forms thereby an included angle .beta.. Angle .alpha. is equal to .beta.. The bead core 20 has perimeter 42 comprising the lengths of the base 44, radially outermost 46, first 48, and second 50 sides. The perimeter 42 defines the bead core area. The width of the bead heel surface 60 is approximately equal to the distance between a hump 80 and an axially inward surface 74 of the wheel flange 76.

Abstract: A complete vehicle wheel assembly includes a wheel with wheel rim having two opposed circular rim flanges and a tire having beads secured at the circular rim flanges. Each one of the circular rim flanges has a tubular hollow chamber with an annular opening. The tubular hollow chamber has a square or rectangular cross-section, and the annular opening has a width such that the bead is insertable into the tubular hollow chamber only in a rotated or deformed state after insertion of the bead, a remaining free space in the tubular hollow chamber is filled with a liquid, hardenable material.

Abstract: A pneumatic vehicle tire has a carcass with at least one radial ply and beads having bead cores, whereby the carcass is anchored to the bead cores. A multi-ply belt is positioned radially outwardly on the carcass, and a tread is positioned radially outwardly on the belt. Sidewalls extend between the tread and the beads. The sidewalls have a first portion extending from the beads outwardly at an angle of 0% to 20% relative to the axial direction of the tire. The sidewalls have increased stiffness within the area of 50% to 90% of a tire height measured in a direction from the bead to the tread. The area of 50% to 90% prevents the sidewalls from touching the road surface when the tire is deflated and compressed.

Abstract: In a pneumatic radial tire for trucks and buses mounted on an approved 15.degree. drop center rim, an outer surface portion of a composite side-rubber and/or an envelope surface of the bead core among members constituting the bead portion of the tire has a curved shape concavedly directed toward the outside of the tire at a region opposite to an inner curved surface of a slantly rising portion in a flange of the approved rim.

Abstract: A tire has a carcass reinforcement (1) which, when viewed in meridian secn, is wound in each bead B about a bead wire (2) coated with a rubber mix, passing from the heel to the toe of the bead B, the upturn (10) being located in a profile (3) of rubber mix in the form of a wedge defined by two sides (31 and 32) coming from an apex A located beneath the section of the coated bead wire (2). Advantageously the upturn (10) surrounds in its entirety the contour of the profile (3), forming either a first radially inner side (32), a lateral side (30), and a final radially outer side (31) or a first radially outer side (31), a lateral side (30), and a final radially inner side (32). The tire may form with different rims J high-performance assemblies in the event of travel at low or zero pressure, permitting simple mounting of the tires and optionally of bearing supports S for the tire tread on the rims J.

Abstract: The run-flat tire has a tread for contacting a ground surface and a belt package with belt plies interior to the tread for support of the tread. A plurality of radially reinforced carcass layers are positioned interior to the belt plies and include at least one carcass layer that extends between spaced apart annular beads. The tire has a pair of sidewalls each extending radially inward from shoulders at lateral edges of the belt package to the annular beads. The sidewalls have a plurality of sidewall stiffening members to support the tire during a loss of inflation pressure. The carcass layers are disposed with the sidewall stiffening members to help support the run-flat tire with a loss of inflation pressure.

Abstract: A tire for mounting on rim with hump in which each bead:a) contains a main wire, around which the carcass fabric is wound, and a secondary wire placed outside the carcass fabric;b) the inner diameter of the main wire after mounting on the rim is greater than the diameter of the top of the hump, and its maximum elastic elongation is at most equal to 1.5%;c) before mounting on the rim, the outer diameter of the secondary wire is less than the inner diameter of the main wire; after mounting on the rim, the inner diameter of the secondary wire is less than the diameter of the top of the hump; the inner diameter of the secondary wire after mounting on the rim is 1.5 to 3% greater than the inner diameter of the secondary wire before mounting on the rim and the maximum elastic elongation of the secondary wire is at least 3%.

Abstract: The run-flat tire has a tread for contacting a ground surface and a belt package with belt plies interior to the tread for support of the tread. A plurality of radially reinforced carcass layers are positioned interior to the belt plies and include at least one carcass layer that extends between spaced apart annular beads. The tire has a pair of sidewalls each extending radially inward from shoulders at lateral edges of the belt package to the annular beads. The sidewalls have a plurality of sidewall stiffening members to support the tire during a loss of inflation pressure. The carcass layers are disposed with the sidewall stiffening members to help support the run-flat tire with a loss of inflation pressure.

Abstract: A radial ply pneumatic tire has a carcass with a bead portion, a carcass reinforcing structure, and a bead filler. The carcass reinforcing structure has at least two plies. The turnup ends of a first or a second ply are wrapped about each bead and terminates in radial proximity of the maximum section width of the tire. In a preferred embodiment of the invention, the tire carcass includes elastomeric first and second filers the first filler being located between the first ply and the innerliner of the tire, and the second filer being located between the first and second ply. The fillers stiffen the sidewalls to permit the tire to be driven while uninflated. The tire may further include an aramid overlay radially outwardly of the reinforcing belt.

Abstract: A rolling assembly is formed of a tire P with radial carcass reinforcement (1), the equilibrium curve of the thickness center line of which is tangent to the bead cores (2), and of a rim J comprising, axially to the outside of each seat (20) a flange R formed of a frustoconical portion (23) having a generatrix forming an angle of between 20.degree. and 60.degree. with a direction parallel to the axis of rotation, which is connected axially to the inside to the rim seat by an S-shaped portion and which is extended axially towards the outside by a cylindrical portion (25), in its turn extended by the curved end (26), the rim J having an axial width A equal to at most 0.65 times the maximum axial width S of the tire mounted on its rim and inflated to its pressure of use.

Abstract: A tire (1), a mounting rim (2) therefor and a circumferentially unstretchable ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the supporting ring (3) and a rim flange (24).

Abstract: A heavy duty radial tire is to be mounted on a 15 degree drop center rim. In a mounted state that the tire is mounted on the rim and inflated to 0.5 ksc but not loaded, the inside diameter BC of the bead cores at the radially innermost point thereof is set to being not more than the diameter BT at the heel point of the bead portions. In a demounted state that the tire is demounted from a rim, the bead bottom is tapered towards the axial inside of the tire at an angle .theta. of from 1.0 to 1.9 times the angle .alpha. of the tapered bead seat of the rim. In the mounted state, the bead core has a radially inner surface tapered at the substantially same angle as the bead seat, and the axial distance BP of the axially inner end of this tapered inner surface from the bead heel point is set in the range of from 1.3 to 2.1 times the maximum width BW of the bead core measured in the direction parallel to the bead seat.

Abstract: A radial tire having bead regions each comprising a bead clinch and a bead seat has between two and ten circumferentially extending ribs projecting outward of the bead region outer surface. The ribs are preferably continuous around the circumference of the tire bead and project outward from the bead region outer surface by a distance not greater than 8%, more preferably not greater than 3%, of the bead base width. Also the ribs preferably have a maximum width of between 5% and 15%, most preferably 10%, of the bead base width. The rib surface most preferably comprises a continuous surface of an arc and straight portion meeting tangentially.

Abstract: An assembly is formed of a tire (1), a mounting rim (2), and an annular bearing support (3) for the tread (10) of the tire, for running at low pressure or at zero pressure. The rim (2) has two seats (23', 23"), the first seat (23') having an outwardly inclined generatrix and being axially outwardly extended by a shoulder or hump (25'), and the second seat (23") having an inwardly inclined generatrix and being axially outwardly extended by a flange (24). The tire (1) has a radial carcass reinforcement (13) with a particular meridional profile and two beads (12', 12") adapted to the mounting rim (2). The tread supporting ring (3) is ovalizable and circumferentially inextensible.

Abstract: A low pressure all terrain vehicle tire 10 features a strapped bead core 20 which comprises distinct layers 30,32,34,36 of filaments 26 positioned relative to one another. The bead core 20 has a substantially square or rectangular cross-section and a radially inward substantially flat base side 44, a radially outermost side 46, an axially inward first side 48, and an axially outward second side 50. The first side 48 intersects the base side 44 at a first edge 54 and forms thereby an included angle .alpha.. The second side 50 intersects the base side 44 at a second edge 56 and forms thereby an included angle .beta.. Angle .alpha. is equal to .beta.. The bead core 20 has perimeter 42 comprising the lengths of the base 44, radially outermost 46, first 48, and second 50 sides. The perimeter 42 defines the bead core area. The width of the bead heel surface 60 is approximately equal to the distance between a hump 80 and an axially inward surface 74 of the wheel flange 76.

Abstract: A radial ply pneumatic tire features a bead core which comprises an arrangement of filaments positioned relative to one another. The bead core has a cross-section and radially inward base side, a radially outermost point or side or sides, an axially inward first side, and an axially outward second side. The base side of the bead core is substantially linear and has a width being between 50% to 75% of the rim seat width. An associated rim has a pair of humps and a rim flange associated with each hump. Each rim flange has an axially inward surface, the distance between each hump and the axially inward surface of the associated rim flange being a rim seat.

Abstract: A high-speed heavy duty pneumatic radial tire for use in airplanes or the like comprises a radial carcass extending between a pair of bead cores, in which a distance between outer surfaces of bead portions is equal to a rim width of a nominal rim and a bead base of each bead portion has a profile between bead heel and bead toe satisfying specified requirements.

Abstract: A tire and rim combination including a flanged rim and a pneumatic tire. The tire includes a pair of bead parts each provided with a plurality of, preferably at least 8, pieces of exhaust ribs projecting from a bead outside surface and extending outwardly in a radial direction so as to form air passages for escape of air between a rim flange and the bead outside surface during rim assembly. A distance F1 from an inner end of the exhaust rib to a bead base line is in a range of 0.7 to 1.5 times a flange height FH measured from the bead base line, and a distance F2 from an outer end of the exhaust rib to the bead base line is not less than 1.1 times the flange height FH. The exhaust rib has a triangular sectional shape having a width of 0.5 to 1.0 mm and a height of 0.5 to 2.0 mm.

Abstract: A radial ply pneumatic tire is described. The tire has a carcass with a bead portion, a carcass reinforcing structure, and a bead filler. The carcass reinforcing structure has at least two plies. The turnup ends of a first and second ply are wrapped about each bead. The turnup end of one of the plies terminates in radial proximity of the maximum section width of the tire. In a preferred embodiment of the invention, the tire carcass includes elastomeric first and second fillers the first filler being located between the first ply and the innerliner of the tire, and the second filler being located between the first and second ply. The fillers stiffen the sidewalls to permit the tire to be driven while uninflated. The tire may further include an aramid overlay radially outwardly of the reinforcing belt.

Abstract: A tire (1) a mounting rim (2) therefor, and a prop ring (3) for supporting the tread (10) of the tire when running at low or zero pressure. The tire (1) has a radial ply casing (13) on which the points that are furthest apart axially are radially apart close to seats (12B) of outwardly sloping beads (12). The seats (12B) engage sloping seats (23', 23") on the rim (2), which may have at least one mounting well (22), at least one cylindrical portion (21) for receiving the elongatable and circumferentially unstretchable rubber supporting ring (3) and a rim flange (24).

Abstract: An improved off-the-road pneumatic tire designed to be mounted on an associated design rim having a flange portion is described. The rim flange has an axially inward surface contacting the axially outward portion of the bead area of the tire. Each bead portion has a surface contacting a radially inner portion of the rim flange. The surface and the flange initially cease contact and diverge from one another at a location in the cross-section of the tire and rim and in a region of the flange in which a line L1 tangent to the flange surface and passing through the axis forms an angle greater than 0.degree. and less than or equal to 15.degree. with a radial line L2 passing through the point of divergence and perpendicular to the axis. The tire has a steel reinforced radial ply which extends between and wraps about each bead. The ply has an inflection point located radially between a radially outward surface of the bead and a radially outward surface of the rim flange portion.

Abstract: Improved tires designed for use in an improved tire/vehicle system having two pneumatic front tires and two pneumatic rear tires are especially effective when utilized on vehicles with a suspension system having limited camber, as in a live axle suspension system. The tires include a support member which is molded to the inboard sidewall of one or more tires in the tire/vehicle system. The inboard sidewall of a tire provides improved lateral stiffness in the tire, for cornering, and functions similar to cambering in tire/vehicle systems where cambering is not possible or where camber adjustment is limited.

Abstract: A pneumatic tire to be mounted on a normal rim, has a pair of bead parts each having a bead bottom surface seating on a rim seat of the normal rim and bead outside surface connecting with the bead bottom surface and abutting against a rim flange of the normal rim. The bead outside surface is provided with an exhaust extending outward in the radial direction from an inner end of the exhaust so as to form the air passage for escape of air between the rim flange and bead outside surface at the time of rim assembly. The inner end of the exhaust is positioned within a region remote from a bead base line by a distance of 0.5 to 1.5 times a separating point height Fh defined as a height in the radial direction from the bead base line to a separating point at which the bead outside surface separates from the rim flange.

Abstract: The invention relates to a tire formed of a plurality of independent pneuic sectors (S) intended to be mounted on a single rim (J) but removable individually from said rim (J), they being inflatable individually or together. The sectors (S) include at least one reinforcing armoring (4) anchored on at least one circumferential bead wire (10) in each circumferential bead, which is the bead mounted on the wheel rim (J), the reinforcing armoring (4) being radially adjacent to a reinforcement armoring (8) of the tread (2). The circumferential bead wires (10) are connected to meridian bead wires (11) located in the sidewalls (50) of the circumferentially adjacent sectors (S).

Abstract: A tire 10, having a rim flange support 18, is provided with void areas 24 in the rim flange support 18, to make possible firm attachment of weights 26 to a rim flange 22 when tire 10 is mounted on a rim 20. The wheel (tire/rim) construction makes balancing of the wheel easier and reduces the possibility that a weight 26 will be lost while the tire is being used.

Abstract: A pneumatic vehicle tire made of rubber or a rubber-like compound has a tire body with two sidewalls and a tread extending between the sidewalls. A carcass is embedded in the tire body and extends from a radially inner edge of a first sidewall to a radially inner edge of a second sidewall. A belt is embedded in the tire body radially inwardly of the tread and radially outwardly of the carcass. A rim-shaped support with fastening elements positioned radially outwardly at the support is provided. The support is connected to the tire body. Reinforcement elements in the form of cords and bands are connected to the fastening elements for forming the carcass. The reinforcement elements extend substantially without deflection from the fastening elements into a neutral bending line of the sidewalls.

Abstract: An improved off-the-road pneumatic tire designed to be mounted on an associated design rim having a flange portion is described. The rim flange has an axially inward surface contacting the axially outward portion of the bead area of the tire. Each bead portion has a surface contacting a radially inner portion of the rim flange. The surface and the flange initially cease contact and diverge from one another at a location in the cross-section of the tire and rim and in a region of the flange in which a line L1 tangent to the flange surface and passing through the axis forms an angle greater than 0.degree. and less than or equal to 15.degree. with a radial line L2 passing through the point of divergence and perpendicular to the axis. The tire has a steel reinforced radial ply which extends between and wraps about each bead. The ply has an inflection point located radially between a radially outward surface of the bead and a radially outward surface of the rim flange portion.

Abstract: A tire structure with radial carcass reinforcement for heavy vehicles and rticularly a tire bead structure which makes it possible to have, on unmodified rims, sidewalls the radii of curvature of which are sufficiently great to avoid premature fatigue of the constituent reinforcement elements of the carcass as a result of the flexing cycles generated by travel. The said tire structure has at least one bead wire (2) which is located radially to the outside of the rim flange (J) and around which the turn-up (1') of the carcass (1) is formed.

Abstract: The run-flat tire includes thickened load bearing sidewall portions, a belt package plus a cap ply, three pairs of sidewall rubber crescent-shaped reinforcing members, a specially designed bead seat area with a rim seat ply and three carcass layers. The three carcass layers are positioned between the crescent-shaped members in each load bearing sidewall.

Abstract: An improved radial ply pneumatic tire 30 is described. The improved tire 30 has a first annular surface 23 located between the heel 22B and toe 22A of each bead 33 and a second surface 24 extending radially outwardly from the bead heel 22B. The first surface 23 is designed to be in contact with the bead seat 42 of the design rim 40 when the tire 30 is mounted and inflated to normal pressure. The first annular surface 23, when the tire 30 is unmounted, forms an average angle .beta. with the axis of the tire, when the beads 33 are axially spaced a distance D equal to the design rim width as defined herein. The average angle .beta. is in the range of at least one-half degree and less than three degrees greater than the angle formed between the mating bead seat 42 of the design rim 40 and the axis of the tire. The second surface 24 is designed to be in contact with an annular flange 44 portion of the design rim 40 when the tire is mounted and inflated to normal pressure.

Abstract: A pneumatic tire having an improved uniformity at tire-wheel assembled state includes a pair of bead portions each closely fitted to a slant bead seat of a standard rim when the tire is mounted on the standard rim, the standard rim including for each bead portion, a rounded concave corner portion smoothly connected to the corresponding slant bead seat and a flange protrusively extending outward from the corresponding rounded concave corner portion and having a curved portion. In this tire, each bead portion has an expanded heel bringing about close fitting to the corresponding rounded concave corner portion prior to a contact between the corresponding curved portion and the corresponding bead portion.

Abstract: The invention is directed to a pneumatic tire that can be mounted on a rim (wheel) to assure good engagement with the rim while preventing the occurrence of rim offsets. The bead portion 4a (as indicated by a solid line in FIG. 1) on the front side of a tire 1 which is later mounted on the rim has a bead base diameter .phi..sub.1, a toe portion angle .phi..sub.1, a contact angle .alpha..sub.1 , and a heel portion radius R.sub.1, whereas the bead portion 4b (as indicated by a dashed line in FIG. 1) on the back side of the tire which is first mounted on the rim has a bead base diameter .phi..sub.2, a toe portion angle .theta..sub.2, a contact angle .alpha..sub.2 and a heel portion radius R.sub.2. The bead portion 4a on the front side has a different shape than the bead portion 4b on the back side and the following two relationships hold between the two bead portions; the angle of .theta..sub.2 of the toe portion on the back side should be greater than the angle .theta..sub.

Abstract: An improved radial ply pneumatic passenger tire 30 having a conical shaped lower sidewall 21B in the unloaded uninflated and mounted state. The angular relationships relative the design rim flange 44 and the bead 33,533,63 permit the lower sidewall 21B of the tire 30 to rotate slightly upon mounting to the design rim 40, thereby improving the stiffness and handling characteristics of the tire 30.

Abstract: The pneumatic radial tire of the invention has a pair of bead portions each containing a bead core therein and is characterized in that each bead core is substantially constructed by winding at least one metal wire, and a bead toe reinforcing rubber stock with a JIS A hardness of 80.degree.-98.degree. is arranged inward of the outer edge of each bead core in an axial direction of the tire. In each bead portion the width of the bead toe reinforcing rubber stock is in a range of 0.5-2.0 times the width of the bead core in the axial direction. In each bead portion the width from the outer edge of the bead core to the inner edge of the bead portion in the axial direction of the tire is in a range of 1.1-3.0 times the width of the bead core in the axial direction of the tire.

Abstract: An improved off-the-road pneumatic tire designed to be mounted on an associated design rim having a flange portion is described. The rim flange has an axially inward surface contacting the axially outward portion of the bead area of the tire. Each bead portion has a surface contacting a radially inner portion of the rim flange. The surface and the flange initially cease contact and diverge from one another at a location in the cross-section of the tire and rim and in a region of the flange in which a line L1 tangent to the flange surface and passing through the axis forms an angle greater than 0.degree. and less than or equal 15.degree. to with radial line L2 passing through the point of divergence and perpendicular to the axis. The tire has a steel reinforced radial ply which extends between and wraps about each bead. The ply has an inflection point located radially between a radially outward surface of the bead and a radially outward surface of the rim flange portion.

Abstract: The weight, space and convenience advantages of a run-flat tire can be substantial. This is especially true for the urban-economy car or family type vehicles which have limited space available for a spare tire and inadequate space for the removed flat tire. These vehicles also have higher comfort requirements that must be addressed. The mini-spare solution to the flat tire problem has very limited performance capabilities. Other solutions include major modifications in the rim and/or the tire, which are not cost effective or compatible with a conversion to standard tires on the same rims.The run-flat tire of this invention includes thickened sidewall portions, a belt package with a cap ply, lower sidewall rubber support portions, a specially designed bead seat area with a rim seat ply and three carcass layers. The classical problems of inflated vs. deflated performance tradeoffs in ride comfort, handling, radial stiffness and endurance of the tire are substantially improved.

Abstract: A radial ply pneumatic tire is described. The tire has a carcass with a bead portion, a carcass reinforcing structure, and a bead filler. The carcass reinforcing structure has two plies with turnup ends wrapped about each bead. The turnup end of the first ply terminates in radial proximity of the maximum section width of the tire. In a preferred embodiment of the invention, the tire carcass includes elastomeric first and second fillers the first filler being located between the first ply and the innerliner of the tire, and the second filler being located between the first and second ply. The fillers stiffen the sidewalls to permit the tire to be driven while uninflated. The bead core of the preferred embodiment has a flat base and a first and second surface extending from the base and inclined relative to the base thereby forming acute included angles of .alpha. and .beta. whereby .alpha. is greater than or equal to .beta..

Abstract: A pneumatic tire, in which, in a cross section including the tire axis, the bead profile is made of a curved line between a locus ofy=f(x(+1 mmand a locus ofy=f(x)-1 mmwhich are made when x-value is varied from -15.29 to 0.523, wherein ##EQU1## x is a variable indicating a relative radial distance in millimeter based on a reference point, defining the direction of increase of the x-value as being radially inward of the tire, and y is a variable indicating a relative axial distance in millimeter based on a reference point, defining the direction of increase of the y-value as being axially inward of the tire.

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

Abstract: A pneumatic tire to be mounted on a normal rim, has a pair of bead parts each having a bead bottom surface seating on a rim seat of the normal rim and bead outside surface connecting with the bead bottom surface and abutting against a rim flange of the normal rim. The bead outside surface is provided with exhaust extending outward in the radial direction from an inner end of the exhaust so as to form the air passage for escape of air between the rim flange and bead outside surface at the time of rim assembly. The inner end of the exhaust is positioned within a region remote from a bead base line by a distance of 0.5 to 1.5 times a separating point height Fh defined as a height in the radial direction from the bead base line to a separating point at which the bead outside surface separates from the rim flange.

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

Abstract: The invention is directed to a tire for mounting on the wheel rim of a vehicle. The tire comprises a pair of bead portions each reinforced by a bead hoop, at least one bead portion of the tire having an additional retention zone positioned axially inwards of and integral with the main bead portion, the retention zone having an axially inner tip or toe substantially inwards of the main bead portion and the construction of the bead portion and the additional retention zone between the bead hoop and tip providing substantial resistance to compressive forces therebetween. The portion between the bead hoop and the tip can include reinforcement and can comprise an elastomeric material having a hardness of 80 to 95 degrees I. R. H. The tip is formed from an elastomeric material having a set property at 70.degree. C. of greater than 40% so that when the tip is fitted to a wheel rim having sharp teeth in the region contacted by the tip, the material of the tip engages the teeth.

Abstract: A tire of the closed torus type is made solid with a rim due to bead wires hich hug a body tightly between themselves and the rim. At each lateral end of the rim, a shoulder is provided and extended by a seat. Diameter .phi..sub.s of the seat is always less than the shoulder diameter .phi..sub.c, and the shape of the bead wire assumes the shape of the rim over at least a 45.degree. sector.

Abstract: A run-flat tire and rim assembly for All Terrain Vehicles comprising: (A) a run-flat tire having beads with a radially inwardly protruding toe and a bead apex; (B) a rim having bead seats with a circumferentially extending groove with which the toe is engaged; (C) the height of the radially outer end of the bead apex being in a range of 15% to 30% of the tire section height; (D) the thickness of the rubber layer on the outside of a carcass in the tire sidewall regions being at least 10 times the diameter of the carcass ply cord; (E) the above-mentioned thickness decreasing gradually from a maximum tire section width point to the tire shoulder so as to form a weak portion in bending in each shoulder; (F) a circumferentially extending buttress provided in each shoulder; and (G) a hump with a diameter larger than the rim diameter formed axially inward of and adjacent to each bead seat of the rim.

Abstract: An open-torus radial ply pneumatic tire is configured for mounting on a specially designed rim. The special rim includes means for restraining the radially outward movement of the tire's rim securing regions, which are spaced apart regions of the rim in which the tire's radial carcass plies are anchored. In the rim securing regions, the carcass plies are turned axially outwardly and encased in a molded elastomeric material having a shape complementary with that of the restraining means of the special rim. The tire also includes a belt structure positioned radially outwardly of the carcass plies.

Abstract: The present invention relates to a radial tire and a radial tire-rim assembly. The radial tire (1) has a pair of beads (2), each bead having a bead core (3) and a bead apex (5), a carcass (4), with both edges thereof folded back around said bead core and fastened to said bead core, a tread (6), a belt layer (7), and an aspect ratio smaller than 60%. The tread is wider (in the axial direction) than the maximum width of said carcass and the edges of said tread are positioned within a range of 50-100% of the height of the cross-section of the carcass. This structure provides the tire side with rigidity and permits the tread to deform so that is supports the weight of the car and runs safely even when the tire pressure is decreased.

Abstract: A tire and an assembly of a rim and a tire are disclosed. The rim has a pair of rim bases, a hump formed axially inside each rim base, and an annular groove formed axially inside each hump.The tire comprises a pair of beads having a bead base seated on the rim base, a pair of bead cores disposed one in each bead, at least one of the beads having a toe and a hump groove disposed between the toe and the bead base, wherein, the tip of the toe is located radially outside a bead base line, and under such condition; that the tire is inflated to a normal internal pressure, the hump groove and the tip of the toe are spaced apart from the hump and the annular groove, and the distance L in the radial direction between the radially outermost point RT of the hump and the radially outermost point PT of the hump groove is not less than 0.5 mm and not more than 2.0 mm.

Abstract: A reverse bead type tire includes a tread, two sidewalls extending from the tread and a bead formed on an adge of each of the sidewalls. Each bead has a bead wire embedded therein and has a contact face which seats on a substantially axially extending seat of a wheel rim. The bead further has a bearing surface seated on a substantially radially inwardly projecting flange which forms an extension of the seat. The bead is configured with surface discontinuities such that a surface area of actual contact of the bead on the seat is less than a surface area of the seat between the flange and a plane P perpendicular to the rotational axis of the wheel and tangent to an axially inside point of the bead wire. As a result, localized pressures at the area of actual contact are high so that tightness of the tire on the wheel is assured. On the other hand, such tightness produced by localized high pressures does not increase mounting difficulty of the tire on the wheel rim.

Abstract: A heavy duty radial tire and rim assembly exhibiting improved bead durability, wherein the bottom face of the bead is composed of an axially inner face Si and an axially outer face So each tapered axially inward to decrease the diameter of the bottom face, the taper in the inner face Si is greater than that of the outer face So, the boundary between the inner face Si and the outer face So is located axially inward of the center of gravity of the bead core, and in the condition that the tire is mounted on a regular rim and inflated to a regular pressure, the axial distance X of the axially inner edge Q2 of the bead core from a bead heal Q1 defined as an intersection between a rim base line B and an extending line of the inner surface of a rim flange of the rim is not less than 80% and not more than 105% of the height HR of the radially outer edge Q3 of the rim flange from the rim base line; and the radial distance Y of the radially outer edge Q4 of the bead core measured radially inwardly from the radially out