JPH05162513A - Pneumatic tire - Google Patents

Pneumatic tire

Info

Publication number
JPH05162513A
JPH05162513A JP3327648A JP32764891A JPH05162513A JP H05162513 A JPH05162513 A JP H05162513A JP 3327648 A JP3327648 A JP 3327648A JP 32764891 A JP32764891 A JP 32764891A JP H05162513 A JPH05162513 A JP H05162513A
Authority
JP
Japan
Prior art keywords
bead core
tire
bead
radial direction
pneumatic tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3327648A
Other languages
Japanese (ja)
Other versions
JP3083892B2 (en
Inventor
Misao Kawabata
操 川端
Kazuo Hayashi
一夫 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP03327648A priority Critical patent/JP3083892B2/en
Publication of JPH05162513A publication Critical patent/JPH05162513A/en
Application granted granted Critical
Publication of JP3083892B2 publication Critical patent/JP3083892B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To improve the operability, the responsiveness to steering, and the road surface gripping force at the time of turn by setting a ratio of a height of a bead core in the tire radial direction against the maximum width of the bead core at 1.7-2.5 times, and forming an outline of the inner peripheral position ;outer peripheral position of the radial direction into a nearly square and a nearly triangle. CONSTITUTION:A part 11a of a bead core 11, which is surrounded by a carcass ply 1, positioned inside of the radial direction and a part 11b thereof positioned outer peripheral side are respectively formed into a nearly square and a nearly triangle. A ratio of height (ho) of a bead core 11 in the tire radial direction to the maximum width Wo of the bead core 11 is set at 1.7-2.5 times. Consequently, the reinforcing effect and the rigidity of a bead part 4 are improved, and the operability and the responsiveness to steering are improved to improve the road surface gripping force at the time of turn.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は空気入りタイヤ、なか
でもとくにビードコアの改良に関するものであり、ビー
ド部の補強効果を高め、ビード部剛性を高めることによ
って、操縦性、操舵に対する応答性および、旋回走行時
の路面グリップ力をともに有効に向上させるものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire, and more particularly to an improvement of a bead core, which enhances the reinforcing effect of the bead portion and enhances the rigidity of the bead portion, thereby improving maneuverability, responsiveness to steering, and This is to effectively improve the road surface grip force when turning.

【0002】[0002]

【従来の技術】偏平率を30〜60%の範囲とした従来の空
気入りタイヤとしては、図2に、トレッド幅方向の部分
断面図で例示するように、タイヤ周方向に対して実質的
に90°の角度でのびる有機繊維コードよりなるカーカス
プライ1の少なくとも一層、図では二層の両側端部分
を、ビードコア2の周りでタイヤの内側から外側へ折り
返して巻上げるとともに、それらの二層のカーカスプラ
イ1により形成したカーカスのクラウン部の外周側に、
タイヤ周方向に対して比較的小さい角度で延在して相互
に交差するそれぞれのコードよりなる、図示しないそれ
ぞれのベルト層の少なくとも二層を配設したところにお
いて、リム組み姿勢のタイヤの幅方向断面内で、ビード
コア1の輪郭形状をほぼ方形形状とするとともに、その
ビードコア1の、タイヤ軸線方向の幅w、好適には、加
硫の終了時におけるビードコア1の形状の崩れが最も少
ない、半径方向中央部分での幅wに対するタイヤ半径方
向の高さhの比h/w を、0.8 〜1.2 の範囲としたものが
ある。
2. Description of the Related Art As a conventional pneumatic tire having a flatness ratio in the range of 30 to 60%, as shown in a partial sectional view in the tread width direction in FIG. At least one layer of the carcass ply 1 made of an organic fiber cord extending at an angle of 90 °, in the figure, both side end portions of the carcass ply 1 are folded around the bead core 2 from the inside of the tire to the outside, and the two layers of these two layers are wound. On the outer peripheral side of the carcass crown formed by the carcass ply 1,
In the width direction of the tire in the rim-assembled posture, at least two layers of belt layers (not shown) each including cords extending at a relatively small angle with respect to the tire circumferential direction and intersecting each other are arranged. Within the cross section, the contour shape of the bead core 1 is substantially rectangular, and the width w of the bead core 1 in the tire axial direction, preferably the shape of the bead core 1 at the end of vulcanization is the smallest, There is one in which the ratio h / w of the height h in the tire radial direction to the width w at the central portion in the direction is set in the range of 0.8 to 1.2.

【0003】[0003]

【発明が解決しようとする課題】ところで、かかる従来
タイヤにあっては、上述したようなビードコア2の外周
側に、硬質ゴムからなるビードフィラー3を配設するこ
とによって、ビード部4を補強するとともに、そのビー
ド部4の剛性の増加をもたらしているも、ビードフィラ
ー3は、硬質とはいえゴム材料にて構成されていること
から、たとえば、車両の操舵によって、タイヤビード部
4に負荷が作用すると、そのビード部4に、タイヤ軸線
方向の内側および/または外側方向への折れ曲がり変
形、ねじれ変形などの変形が生じ易く、これらの変形
が、操縦性の低下、操舵操作に対する応答遅れ、路面グ
リップ力の低下などの不都合をもたらす問題があった。
In the conventional tire, the bead portion 4 is reinforced by disposing the bead filler 3 made of hard rubber on the outer peripheral side of the bead core 2 as described above. At the same time, the rigidity of the bead portion 4 is increased, but since the bead filler 3 is made of a rubber material although it is hard, a load is applied to the tire bead portion 4 by steering the vehicle, for example. When actuated, the bead portion 4 is liable to be deformed such as bending and twisting inward and / or outward in the tire axial direction, and these deformations cause deterioration of maneuverability, delay in response to steering operation, and road surface. There is a problem that causes inconvenience such as a decrease in grip power.

【0004】この発明は、従来技術の有するこのような
問題点を解決することを課題として検討した結果なされ
たものであり、この発明の目的は、操縦性、操舵に対す
る応答性および、旋回走行時の路面グリップ力を有効に
向上させることができる空気入りタイヤを提供するにあ
る。
The present invention has been made as a result of studies to solve such problems of the prior art, and an object of the present invention is to controllability, responsiveness to steering, and turning. To provide a pneumatic tire capable of effectively improving the road surface gripping force.

【0005】[0005]

【課題を解決するための手段】この発明の空気入りタイ
ヤは、とくに、タイヤ幅方向断面内で、ビードコアの、
最大幅に対するタイヤ半径方向の高さの比を1.7 〜2.5
倍の範囲とし、そして、そのビードコアの、半径方向の
内周側に位置する部分の輪郭形状をほぼ方形形状とする
とともに、半径方向の外周側に位置する部分の輪郭形状
をほぼ三角形形状とすることによって、ビードコアの内
周面から、その半径方向のほぼ中央部分までのビードコ
ア幅を実質的に一定とする一方、その中央部分より外周
側に向けてビードコア幅を次第に減少させる。なおここ
で、ビードコアの幅とは、リム組み姿勢のタイヤにおけ
るタイヤ軸線方向の幅を意味し、その最大幅位置は、通
常は、矩形輪郭形状を有する半径方向内周側部分内で、
半径方向のほぼ中央部分に存在する。かかる空気入りタ
イヤにおいて、より好ましくは、ビードコアを、ゴム被
覆した一本の金属ワイヤーの螺旋巻回構体によって構成
する。
A pneumatic tire according to the present invention, in particular, has a bead core of
The ratio of the height in the radial direction of the tire to the maximum width is 1.7 to 2.5
The bead core has a substantially rectangular shape on the radially inner side, and a substantially triangular shape on the radially outer side. As a result, the bead core width from the inner peripheral surface of the bead core to the substantially central portion in the radial direction is made substantially constant, while the bead core width is gradually reduced from the central portion toward the outer peripheral side. Here, the width of the bead core means the width in the tire axial direction in the tire in the rim-assembled posture, and the maximum width position thereof is usually within the radially inner peripheral side portion having the rectangular contour shape.
It exists almost in the center in the radial direction. In such a pneumatic tire, more preferably, the bead core is composed of a single spirally wound structure of rubber-coated metal wire.

【0006】[0006]

【作用】この発明の空気入りタイヤでは、ビードコア
を、輪郭形状がほぼ方形形状をなす半径方向内周側部分
と、輪郭形状がほぼ三角形形状をなす半径方向外周側部
分とで構成し、従来技術のビードコアに対して三角形輪
郭形状部分を付加した如くの形状とすることにより、従
来技術ではビードフィラーをもって補強していた部分の
一部を、ビードコアによって補強することができ、これ
がため、タイヤビード部の補強効果が一層高まり、ビー
ド部剛性もまた高まることになり、車両の旋回走行時に
おけるタイヤビード部の折れ曲がり、ねじれなどの変形
が十分に防止されることになる。
In the pneumatic tire of the present invention, the bead core is composed of a radially inner peripheral portion having a substantially rectangular contour shape and a radially outer peripheral portion having a substantially triangular contour shape. By forming the bead core with a triangular contour shape part, a part of the part that was reinforced with the bead filler in the prior art can be reinforced by the bead core, which is why the tire bead part The effect of reinforcing the tire is further enhanced, and the rigidity of the bead portion is also enhanced, so that the tire bead portion can be sufficiently prevented from being deformed such as bending and twisting during turning of the vehicle.

【0007】そしてこのことは、ビードコアの、最大幅
に対するタイヤ半径方向の高さの比を1.7 〜2.5 倍とし
た場合にとくに顕著である。すなわち、それが1.7 倍未
満では、タイヤのリム組み状態において、ビードコアの
半径方向外周縁が、リムフランジの外周縁位置もしくは
それより内周側に位置することになるため、そのビード
コアによる、タイヤビード部の補強効果の向上をそれほ
ど期待することができず、それが2.5 倍を越えると、現
有のタイヤ製造装置にては、ビードコアの上端が成型ド
ラム上縁より出るためプライを折り返した際に、その部
分に走行時のセパレーションの原因となる間隙ができて
しまう。
This is particularly remarkable when the ratio of the height of the bead core in the tire radial direction to the maximum width is 1.7 to 2.5 times. That is, if it is less than 1.7 times, the outer peripheral edge of the bead core in the radial direction is located at the outer peripheral edge position of the rim flange or at the inner peripheral side thereof in the tire rim assembled state. When the ply is folded back, the upper end of the bead core goes out of the upper edge of the molding drum in the existing tire manufacturing equipment when the reinforcement effect of the part cannot be expected to increase so much, and when it exceeds 2.5 times. There is a gap in that part that causes separation during traveling.

【0008】従って、この空気入りタイヤによれば、従
来タイヤに比して、車両の操縦性を高めるとともに、操
舵に対する応答性を高めることができ、さらには、旋回
走行時の路面グリップ力を効果的に高めることができ
る。なおここで、上述したビードコアを、ゴム被覆した
一本の金属ワイヤーの螺旋巻回構体により構成した場合
には、その金属ワイヤーの継ぎ目を一個所とすることが
できてタイヤのユニフォミティが大きく向上する他、リ
ムへのフィット性、および製品精度が向上するなどとい
う利点をもたらすことができる。
Therefore, according to this pneumatic tire, the maneuverability of the vehicle and the responsiveness to steering can be enhanced as compared with the conventional tire, and further, the road surface grip force during turning is effective. Can be increased. In addition, here, when the above-mentioned bead core is configured by a spirally wound structure of a single rubber-coated metal wire, the seam of the metal wire can be a single location, which greatly improves the uniformity of the tire. In addition, it is possible to bring advantages such as improved fitability to the rim and improved product accuracy.

【0009】[0009]

【実施例】以下にこの発明の実施例を図面に基づいて説
明する。図1は、この発明の一実施例を示すタイヤ幅方
向の部分断面図であり、偏平率が30〜60%の範囲のこの
タイヤの、カーカス、ベルト等の基本的補強部材は、従
来例で述べたと同様の構造を有する。ここではとくに、
カーカスプライ1によって囲まれるビードコア11におい
て、それの半径方向内周側に位置する部分11a の輪郭形
状をほぼ方形形状とするとともに、それの半径方向外周
側に位置する部分11b の輪郭形状をほぼ三角形形状と
し、これによって、ビードコア11の内周面から、その半
径方向のほぼ中央部分までのビードコア幅、すなわち、
リム組み姿勢のタイヤの、タイヤ軸線方向のビードコア
幅を実質的に一定とする一方、その中央部分より外周側
の部分11b の幅を、半径方向外方に向けて次第に薄肉と
する。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view in the tire width direction showing an embodiment of the present invention, in which a tire having a flatness in the range of 30 to 60% has a basic reinforcing member such as a carcass and a belt in a conventional example. It has a structure similar to that described. Especially here
In the bead core 11 surrounded by the carcass ply 1, the contour shape of the portion 11a located on the radially inner side is substantially square, and the contour shape of the portion 11b located on the radially outer side is substantially triangular. The shape, thereby, the bead core width from the inner peripheral surface of the bead core 11 to the substantially central portion in the radial direction, that is,
While the bead core width of the tire in the rim-assembled posture in the tire axial direction is made substantially constant, the width of the portion 11b on the outer peripheral side of the central portion is gradually reduced outward in the radial direction.

【0010】かかるビードコア11の半径方向内周側部分
11a は、たとえば、ゴム被覆した一本の金属ワイヤー
を、図に示すように六段六列に螺旋巻回することによっ
て形成することができ、また、そのビードコア11の半径
方向外周側部分11b は、これも図示のように、上記金属
ワイヤーに連続するワイヤーを、タイヤ内側側での一列
づつの減少下で6段に巻回することによって形成するこ
とができる。従って図示例によれば、ビードコア11の外
周側に配設されるビードフィラー3の一部は、ビードコ
ア11の半径方向外周側部分11b とカーカスプライ1の本
体部分との間に入り込んで位置することになる。
Radial inner peripheral side portion of the bead core 11
11a can be formed, for example, by spirally winding one rubber-coated metal wire into six rows and six rows as shown in the figure, and the radial outer peripheral side portion 11b of the bead core 11 can be formed. Also, as shown in the figure, it can be formed by winding a wire continuous to the metal wire in 6 stages under the reduction of one row on the inner side of the tire. Therefore, according to the illustrated example, a part of the bead filler 3 arranged on the outer peripheral side of the bead core 11 is positioned so as to be inserted between the radially outer peripheral part 11b of the bead core 11 and the main body part of the carcass ply 1. become.

【0011】またここでは、ビードコア11の最大幅w0
対する、それのタイヤ半径方向の高さh0の比を1.7 〜2.
5 倍の範囲、たとえば2.0 倍とすることによって、上述
した構成を有するビードコア11の、十分なる機能の発揮
を担保する。ここで、ビードコア11の最大幅w0の測定位
置は、それの半径方向内周側部分11a の、半径方向のほ
ぼ中央部分とすることが好ましく、このことによれば、
加硫の終了に至るまでの間における、ビードコア形状の
崩れの影響を有効に取り除くことができる。
Further, here, the ratio of the height h 0 of the bead core 11 to the maximum width w 0 thereof in the tire radial direction is 1.7 to 2.
By setting the range to 5 times, for example, 2.0 times, the bead core 11 having the above-mentioned configuration is guaranteed to exhibit a sufficient function. Here, it is preferable that the measurement position of the maximum width w 0 of the bead core 11 is at a substantially central portion in the radial direction of the radially inner peripheral side portion 11a thereof.
It is possible to effectively remove the influence of the collapse of the bead core shape until the end of vulcanization.

【0012】このような空気入りタイヤによれば、その
ビードコア11の上述した構造に基づき、タイヤビード部
4を十分に補強して、その部分の剛性を効果的に高める
ことができ、それ故に、従来技術に比して、操縦性およ
び、操舵に対する応答性をともに有効に向上させること
ができるとともに、旋回走行時の路面グリップ力をもま
た有効に高めることができる。
According to such a pneumatic tire, based on the above-mentioned structure of the bead core 11, the tire bead portion 4 can be sufficiently reinforced and the rigidity of that portion can be effectively enhanced, and therefore, As compared with the prior art, both maneuverability and responsiveness to steering can be effectively improved, and the road surface grip force during turning can also be effectively increased.

【0013】[0013]

【比較例】以下に発明タイヤと従来タイヤとの、操舵に
対する応答性および、旋回走行時の路面グリップ力に関
する比較試験について説明する。 o 発明タイヤ 図1に示すビードコア構造を有するタイヤであって、h0
/w0 =2.0 とし、サイズを255/40 ZR17 としたもの。 o 従来タイヤ 図2に示すビードコア構造(六段六列)を有するタイヤ
であって、h/w =1.0 とした他は発明タイヤと同一のも
の。 o 試験方法 応答性は、室内操縦性試験機において、スリップアング
ル−コーナリングフォース曲線を求め、その初期の傾き
を求めた。傾きが大きいほど応答性が良い。路面グリッ
プ力は、実車に加速度計を積み定常内旋回にて求心加速
度を求めた。 o 試験結果 上記試験結果を、従来タイヤをコントロールとして表1
に指数表示する。なお、指数値は大きいほどすぐれた結
果を示すものとする。
COMPARATIVE EXAMPLE A comparative test of the response of the invention tire and the conventional tire with respect to steering and the road surface grip force during turning will be described below. A tire having a bead core structure shown in o invention tire Figure 1, h 0
/ w 0 = 2.0 and size is 255/40 ZR17. o Conventional tire A tire having a bead core structure (6 rows and 6 columns) shown in Fig. 2, which is the same as the invention tire except that h / w = 1.0. o Test method For the response, a slip angle-cornering force curve was obtained using an indoor maneuverability tester, and the initial inclination thereof was obtained. The larger the inclination, the better the response. For the road grip force, the centripetal acceleration was obtained by steady accelerometer mounted on an actual vehicle. o Test Results Table 1 shows the above test results using the conventional tire as a control.
Is displayed as an index. The larger the index value, the better the result.

【0014】[0014]

【表1】 この表によれば、発明タイヤでは応答性および路面グリ
ップ力をともに有効に向上させ得ることが明らかであ
る。
[Table 1] According to this table, it is clear that the invention tire can effectively improve both the responsiveness and the road grip force.

【0015】[0015]

【発明の効果】以上に述べたところから明らかなよう
に、この発明によれば、とくには、ビードコアの構造の
改良によって、タイヤビード部の補強効果を十分に高め
て、ビード部剛性を高めることにより、車両の旋回走行
に際するそのビード部の変形を十分に抑制することがで
き、この結果として、操縦性の向上、操舵に対する応答
性の向上および、旋回走行時の路面グリップ力の増加が
実現されることになる。
As is apparent from the above description, according to the present invention, in particular, by improving the structure of the bead core, the reinforcing effect of the tire bead portion is sufficiently enhanced and the rigidity of the bead portion is enhanced. As a result, it is possible to sufficiently suppress the deformation of the bead portion when the vehicle is turning, and as a result, it is possible to improve the maneuverability, the responsiveness to steering, and the increase in the road grip force during turning. Will be realized.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例を示すタイヤ幅方向の部分
断面図である。
FIG. 1 is a partial cross-sectional view in the tire width direction showing an embodiment of the present invention.

【図2】従来例を示す図1と同様の断面図である。FIG. 2 is a sectional view similar to FIG. 1 showing a conventional example.

【符号の説明】[Explanation of symbols]

1 カーカスプライ 3 ビードフィラー 4 ビード部 11 ビードコア 11a, 11b 部分 w0 最大幅 h0 高さ1 carcass ply 3 bead filler 4 bead part 11 bead core 11a, 11b part w 0 maximum width h 0 height

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 タイヤ周方向に対して実質的に90°の角
度で延在する有機繊維コードよりなるカーカスプライの
少なくとも一層の両側端部分を、ビードコアの周りでタ
イヤの内側から外側へ折り返して巻上げるとともに、少
なくとも一層のカーカスプライにより形成したカーカス
のクラウン部の外周側に、タイヤ周方向に対して比較的
小さい角度で延在して相互に交差するそれぞれのコード
よりなるそれぞれのベルト層の少なくとも二層を配設
し、偏平率を30〜60%の範囲とした空気入りタイヤであ
って、 タイヤ幅方向断面内で、前記ビードコアの、最大幅に対
するタイヤ半径方向の高さの比を1.7 〜2.5 倍の範囲と
し、そのビードコアの、半径方向の内周側に位置する部
分の輪郭形状をほぼ方形形状とするとともに、半径方向
の外周側に位置する部分の輪郭形状をほぼ三角形形状と
してなる空気入りタイヤ。
1. A carcass ply comprising organic fiber cords extending at an angle of substantially 90 ° with respect to the tire circumferential direction, at least one side end portion of which is folded back from the inside of the tire to the outside around the bead core. Along with winding up, on the outer peripheral side of the crown portion of the carcass formed by at least one layer of carcass ply, of each belt layer formed of cords that extend at a relatively small angle with respect to the tire circumferential direction and intersect with each other. A pneumatic tire having at least two layers and having an aspect ratio in the range of 30 to 60%, wherein the ratio of the height of the bead core in the tire radial direction to the maximum width is 1.7 in the tire width direction cross section. Approximately 2.5 times the size of the bead core, and the contour of the bead core located on the radially inner side is approximately square and is located on the radially outer side. A pneumatic tire substantially as triangular minute contour.
【請求項2】 前記ビードコアを、ゴム被覆した一本の
金属ワイヤーの螺旋巻回構体により構成してなる請求項
1記載の空気入りタイヤ。
2. The pneumatic tire according to claim 1, wherein the bead core is formed of a spirally wound structure of a single metal wire covered with rubber.
JP03327648A 1991-12-11 1991-12-11 Pneumatic tire Expired - Fee Related JP3083892B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03327648A JP3083892B2 (en) 1991-12-11 1991-12-11 Pneumatic tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03327648A JP3083892B2 (en) 1991-12-11 1991-12-11 Pneumatic tire

Publications (2)

Publication Number Publication Date
JPH05162513A true JPH05162513A (en) 1993-06-29
JP3083892B2 JP3083892B2 (en) 2000-09-04

Family

ID=18201407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03327648A Expired - Fee Related JP3083892B2 (en) 1991-12-11 1991-12-11 Pneumatic tire

Country Status (1)

Country Link
JP (1) JP3083892B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201462A2 (en) * 2000-10-23 2002-05-02 The Goodyear Tire & Rubber Company Triangular bead construction for pneumatic tire with extended load carrying capacity
JP2009126262A (en) * 2007-11-21 2009-06-11 Bridgestone Corp Run flat tire
WO2022176911A1 (en) * 2021-02-17 2022-08-25 株式会社ブリヂストン Pneumatic tire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0732586U (en) * 1993-11-22 1995-06-16 リズム時計工業株式会社 Watch plate mounting structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6491076B1 (en) * 2000-06-13 2002-12-10 The Goodyear Tire & Rubber Company Triangular bead configuration for pneumatic tire with extended load carrying capacity
EP1201462A2 (en) * 2000-10-23 2002-05-02 The Goodyear Tire & Rubber Company Triangular bead construction for pneumatic tire with extended load carrying capacity
EP1201462A3 (en) * 2000-10-23 2003-04-16 The Goodyear Tire & Rubber Company Triangular bead construction for pneumatic tire with extended load carrying capacity
JP2009126262A (en) * 2007-11-21 2009-06-11 Bridgestone Corp Run flat tire
WO2022176911A1 (en) * 2021-02-17 2022-08-25 株式会社ブリヂストン Pneumatic tire

Also Published As

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JP3083892B2 (en) 2000-09-04

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