JPH0628860B2 - Pneumatic tires for motorcycles - Google Patents
Pneumatic tires for motorcyclesInfo
- Publication number
- JPH0628860B2 JPH0628860B2 JP60144447A JP14444785A JPH0628860B2 JP H0628860 B2 JPH0628860 B2 JP H0628860B2 JP 60144447 A JP60144447 A JP 60144447A JP 14444785 A JP14444785 A JP 14444785A JP H0628860 B2 JPH0628860 B2 JP H0628860B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- tread
- mold
- equatorial plane
- width
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/10—Tyres specially adapted for particular applications for motorcycles, scooters or the like
Landscapes
- Tyre Moulding (AREA)
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、接地面内で少なくとも横断方向に延在する溝
をトレッド周上に実質上等間隔に配置した二輪車用空気
入りタイヤに関し、特に前記溝の底部におけるクラック
の発生を効果的に防止しうるタイヤを提案するものであ
る。Description: TECHNICAL FIELD The present invention relates to a pneumatic tire for a motorcycle, in which grooves extending at least in a transverse direction in a ground contact surface are arranged at substantially equal intervals on a circumference of a tread, and more particularly, to a pneumatic tire for a motorcycle. The present invention proposes a tire that can effectively prevent the occurrence of cracks at the bottom of the groove.
（従来の技術） 一般に二輪車用空気入りタイヤは、比較的円いカーカス
輪郭に沿って著しく広いトレッドを有するとはいえ四輪
車用タイヤと同様にトレッドパターンとしては、リブ，
ブロック等の各種タイプが採用されている。そしてタイ
ヤ製造に当りタイヤを加硫硬化させるモールドとして
は、トレッド上におけるタイヤの赤道面相当位置に周上
に延びる合せ位置（分割位置）をもちタイヤの軸線方向
に２分割された構成のいわゆるフルモールドが用いられ
る。トレッドパターンによって赤道面位置に溝を有する
場合にはその位置を避け、その溝に隣接して形成される
リブ上にモールドの合せ位置を設けることもある。この
場合、赤道面から合せ位置迄の距離は最大でも５mm前後
の僅かな値とされている。(Prior Art) Generally, although a pneumatic tire for a motorcycle has a remarkably wide tread along a relatively round carcass contour, ribs are used as a tread pattern like a tire for a four-wheel vehicle.
Various types such as blocks are used. As a mold for vulcanizing and curing the tire in tire production, a so-called full mold having a fitting position (dividing position) that extends circumferentially at a position corresponding to the equatorial plane of the tire on the tread and is divided into two in the axial direction of the tire. A mold is used. When a groove is provided at the equatorial plane position due to the tread pattern, the position may be avoided, and a mold alignment position may be provided on a rib formed adjacent to the groove. In this case, the distance from the equatorial plane to the alignment position is a small value of about 5 mm at the maximum.
（発明が解決しようとする問題点） このようなモールドでタイヤを加硫硬化する場合、タイ
ヤの内側よりブラダーを介し高温，高圧がモールドに対
して加えられるため、トレッドを形成するゴムが加硫初
期に軟化してモールドの合せ面（モールド分割面）内に
僅かながらはみ出し、タイヤと一体に硬化する。このは
み出しをバリと称する。トレッド部の赤道面近傍におい
て接地面を横断する方向に溝１を有し、その位置にモー
ルド合せ面が存在する場合、トレッドパターンを加硫硬
化するために前記金型を用いると第２図に示すごとく前
記金型の割位置と横断溝１とが交叉する区域Ｑにバリ３
が生じる。第３図に示すように、バリ３は四輪車の場合
と異なり、二輪車の特に駆動輪においては溝１をはさむ
両側の陸部Ｒ，Ｒ′に急発進，急ブレーキ時のトルクが
作用することにより矢印ｆ方向の大きな力が溝壁に対し
局所的に加わる。この結果、薄くてよわいバリ３にき裂
４が発生し、このき裂４が前記急発進，急ブレーキの繰
り返えしにより溝１の溝底に沿って成長し、溝底にき裂
の核を作り、これがグルーブクラックへと成長し、トレ
ッドゴムの欠損等、早期故障につながる重要な問題の原
因となっている。(Problems to be Solved by the Invention) When vulcanizing and curing a tire with such a mold, high temperature and high pressure are applied to the mold from the inside of the tire through a bladder, so that the rubber forming the tread is vulcanized. Initially, it softens and slightly protrudes into the mating surface (mold dividing surface) of the mold and hardens integrally with the tire. This protrusion is called a burr. In the case where the groove 1 is provided in the direction near the ground plane in the vicinity of the equatorial plane of the tread, and the mold mating surface exists at that position, the mold is used to vulcanize and cure the tread pattern. As shown, a burr 3 is formed in the area Q where the split position of the mold and the transverse groove 1 intersect.
Occurs. As shown in FIG. 3, unlike the case of the four-wheeled vehicle, the burr 3 exerts a torque at the time of sudden start and sudden braking on the land portions R, R'on both sides of the groove 1 in the two-wheeled vehicle, especially the drive wheel. As a result, a large force in the direction of arrow f is locally applied to the groove wall. As a result, a crack 4 is generated on the thin and burr 3, and the crack 4 grows along the groove bottom of the groove 1 due to the repeated rapid start and sudden braking, and the crack 4 is formed on the groove bottom. Nuclei are formed, which grow into groove cracks, causing important problems such as loss of tread rubber and premature failure.
したがって本発明は、前述のごときパターンを有するタ
イヤの製造に用いられる２分割金型の割位置について改
良を加え、その金型により加硫硬化して製造したタイヤ
において前記グルーブクラックの発生を効果的に抑制可
能とすることを目的としている。Therefore, the present invention improves the cracking position of a two-divided mold used for manufacturing a tire having a pattern as described above, and effectively causes the generation of the groove crack in the tire manufactured by vulcanization and curing by the mold. The purpose is to be able to suppress.
（問題点を解決するための手段） 上記目的を達成すべく本発明者が種々検討したところ、
前記分割位置とタイヤの接地面内における接地圧との間
には深い相関関係があることが判明した。すなわち接地
圧の高い部位に前記バリが形成されない構成とすれば赤
道面位置に溝を有する前述のパターンでもグルーブクラ
ック等の発生を効果的に抑制しうることを解明したので
ある。ここに「接地面内」とは、正規内圧及び正規荷重
下におけるキャンバー角０°の接地面積内を意味してい
る。(Means for Solving Problems) When the present inventor conducted various studies to achieve the above object,
It was found that there is a deep correlation between the division position and the contact pressure in the contact surface of the tire. That is, it has been clarified that even if the above-mentioned pattern having a groove at the equatorial plane position is used, the occurrence of groove cracks can be effectively suppressed if the burr is not formed at a portion where the ground pressure is high. Here, “in the ground contact surface” means within a ground contact area with a camber angle of 0 ° under a normal internal pressure and a normal load.
本発明は、上記の着想にもとづいてなされたものであ
り、一対のサイドウォールと、両サイドウォールにまた
がって延在するトレッド部と、これら各部分を全体的に
補強するカーカスとを具え、前記トレッド部が前記カー
カスの断面輪郭に沿いほぼ均等な肉厚をもってタイヤの
最大幅位置まで延在する広い幅を有し、該トレッドを斜
めおよび／または横断方向に延在する複数の溝によって
トレッド要素を画成してなる二輪車空気入りタイヤにお
いて、該タイヤは、トレッド上周方向に合せ位置を有
し、かつ軸線方向に分割されるモールドによって加硫硬
化され、上記モールドの合せ位置が、タイヤをリムに組
込み、使用内圧を充填し、かつタイヤの赤道面が路面と
垂直をなす姿勢とするとともに、タイヤに使用荷重を負
荷した条件の下で、接地幅の少なくとも２５％の距離だ
けタイヤの赤道面から軸線方向にオフセットされた位置
にあり、そのモールド合せ位置を示す合せ目をトレッド
上に具えることを特徴とする二輪車用空気入りタイヤを
要旨とするものである。The present invention has been made based on the above idea, comprising a pair of sidewalls, a tread portion extending over both sidewalls, and a carcass for totally reinforcing these portions, The tread portion has a wide width extending to the maximum width position of the tire with a substantially uniform wall thickness along the cross-sectional contour of the carcass, and the tread element is provided by a plurality of grooves extending diagonally and / or transversely of the tread. In the two-wheeled vehicle pneumatic tire, the tire has a fitting position in the upper circumferential direction of the tread, and is vulcanized and cured by a mold divided in the axial direction, and the fitting position of the mold is the tire. Installed on the rim, filled with the working internal pressure, with the equatorial plane of the tire perpendicular to the road surface, and under the condition that the tire is loaded with the working load, A pneumatic tire for a motorcycle, which is located at a position axially offset from the equatorial plane of the tire by a distance of at least 25% of the width, and has a seam indicating the mold alignment position on the tread. To do.
このように本発明においてモールドの合せ位置を赤道面
からオフセットさせる理由は下記のとおりである。すな
わち、二輪車用タイヤのように断面が円いトレッド形状
を呈するタイヤにあっては軸線方向の接地圧分布が放物
線状を呈し、トレッド中央部（赤道面位置）において異
常に高く、接地端方向に急減する。そして、従来のタイ
ヤにおいてはトレッド中央部における接地圧が高いこと
に起因して、走行に際して駆動時及び制動時のトルクが
トレッド中央部におけるトレッド要素に直接作用し、溝
をより大きな力で強制的に開くためにグルーブクラック
の成長を防止するのが困難であった。本発明ではモール
ドの合せ位置を接地幅の少なくとも２５％だけ赤道面位
置より軸線方向にオフセットして配置し、トレッド接地
面内における高い接地圧の作用する赤道面にバリが形成
されない構成としたので、タイヤの耐クラック性を著し
く改善することができる。なお、オフセット量が60％を
越えると、耐クラック性に関しては特に問題とすべき点
は認められないが、製造技術上の見地からは加硫に際し
て生タイヤ（グリーンタイヤ）の挿入時にいわゆるモー
ルド咬み等の支障をきたすおそれがある。したがって、
本発明の好適な実施態様においては、モードの合せ位置
を上記条件での接地端位置、すなわち約44％位置から60
％位置までの範囲内で赤道面から軸線方向に離れた位置
とする。The reason why the mold alignment position is offset from the equatorial plane in the present invention is as follows. That is, in a tire having a round tread shape such as a motorcycle tire, the ground pressure distribution in the axial direction has a parabolic shape, is abnormally high in the tread central portion (equatorial plane position), and is in the ground contact end direction. Decrease sharply. In a conventional tire, due to the high ground contact pressure in the tread central portion, the torque during driving and braking during running directly acts on the tread element in the tread central portion, forcing the groove with greater force. It was difficult to prevent the growth of groove cracks due to the opening of the groove. In the present invention, the position where the mold is fitted is offset from the position of the equatorial plane by at least 25% of the grounding width in the axial direction, and burr is not formed on the equatorial plane where a high ground pressure acts in the tread grounding plane. The crack resistance of the tire can be remarkably improved. If the offset amount exceeds 60%, no particular problem should be observed regarding crack resistance, but from the viewpoint of manufacturing technology, so-called mold biting during insertion of a raw tire (green tire) during vulcanization. There is a risk of causing problems such as. Therefore,
In a preferred embodiment of the present invention, the mode alignment position is set to the ground end position under the above conditions, that is, from about 44% position to 60.
The position is separated from the equatorial plane in the axial direction within the range up to the% position.
（作用） 本発明によるタイヤの製造に用いるモールドは、その合
せ位置がタイヤの赤道面位置よりタイヤの軸線方向にオ
フセットした部分にある。そのオフセット量は、タイヤ
をリムに組込んで使用内圧を充填し、使用荷重の負荷時
に、すなわち車輌に装着し運転車が乗車して走行する使
用条件下でタイヤの赤道面が路面に対して垂直をなす姿
勢をとるときに、接地幅の少くとも25％だけタイヤの赤
道面から軸線方向に離れた位置に相当する値とする。こ
れはトレッドの曲面に沿って測ったトレッド端までの距
離の約22％だけ赤道面から離れた位置に相当する。(Operation) In the mold used for manufacturing the tire according to the present invention, the matching position is in a portion offset from the equatorial plane position of the tire in the axial direction of the tire. The offset amount is that the tire's equatorial plane is relative to the road surface when the tire is installed in the rim and the working internal pressure is filled, and when the working load is applied, that is, when the tire is mounted on the vehicle and the operating condition is such that the driver rides on the vehicle. When in a vertical position, the value should correspond to a position axially separated from the equatorial plane of the tire by at least 25% of the ground contact width. This corresponds to a position separated from the equatorial plane by about 22% of the distance to the tread edge measured along the curved surface of the tread.
上述の構成に係る本発明のタイヤにおいて、カーカスと
しては、コードをタイヤの赤道面に対して約75〜95°の
角度をもって配列した層の１枚又は複数枚の層よりなる
いわゆるラジアル構造、並びに赤道面に対して約25°〜
45°の角度で配列した層の１枚又は複数枚の層よりなる
いわゆるバイアス構造の何れのものを用いてもよい。な
おラジアル構造の場合は、カーカスのクラウン部上に赤
道面に対し25°を越ない範囲で非伸張性コードを配列し
た層の１枚又は複数枚より成るベルト層をトレッドのほ
ぼ全幅に亘って配置することができる。この場合、コー
ドが０°のときはともかく、赤道面に対してある角度を
有するときは例えば２枚のベルト層をコードの向きが相
互に逆向きとなるように重ね合せる。他方、バイアス構
造の場合は、必要に応じてカーカスコードと同種材料よ
りなるコード層をカーカスコード角と同等又はそれ以下
の角度をもって、かつトレッド幅の50％〜100％幅の広
さでカーカスのクラウン部に重ねて用いるが望ましい。In the tire of the present invention having the above-mentioned configuration, as the carcass, a so-called radial structure composed of one or more layers of cords arranged at an angle of about 75 to 95 ° with respect to the equatorial plane of the tire, and About 25 ° to the equatorial plane
Any so-called bias structure composed of one or a plurality of layers arranged at an angle of 45 ° may be used. In the case of a radial structure, a belt layer consisting of one or more layers in which non-stretchable cords are arranged on the crown portion of the carcass within a range of not more than 25 ° with respect to the equatorial plane over the entire width of the tread. Can be placed. In this case, regardless of the cord being 0 °, when the cord has an angle with respect to the equatorial plane, for example, two belt layers are laminated so that the cords are oriented in opposite directions. On the other hand, in the case of the bias structure, if necessary, a cord layer made of the same material as the carcass cord is formed with an angle equal to or less than the carcass cord angle and a width of 50% to 100% of the tread width. It is desirable to use it on the crown part.
（実施例） 以下、本発明をタイヤサイズ110／90−17の二輪車用空
気入りタイヤに適用した具体的実施例について説明す
る。(Examples) Hereinafter, specific examples in which the present invention is applied to a pneumatic tire for a motorcycle having a tire size of 110 / 90-17 will be described.
本実施例では、第１図に示すようにフルモールドの分割
位置Ｐ−Ｐをタイヤ中心（赤道面）Ｏ−Ｏから左右一方
のトレッド端ｅ，ｅ′側にｗ（35mm）オフセットさせて
配置した。なお本タイヤの1/2トレッド孤幅（W/2）は57
mmであり、キャンバー角０°時の設置幅は30mm、パター
ンは横断溝１を周上に実質的に等間隔に配置し、前記横
断溝１の間にこれらを１本おきに連結する補助溝２を配
置したものである。In this embodiment, as shown in FIG. 1, the full mold division position P-P is arranged offset from the tire center (equatorial plane) O-O by w (35 mm) to the left and right tread ends e, e '. did. The 1/2 tread width (W / 2) of this tire is 57.
mm, the installation width when the camber angle is 0 ° is 30 mm, and the pattern has auxiliary grooves in which the transverse grooves 1 are arranged at substantially equal intervals on the circumference, and every other transverse grooves 1 are connected to each other. 2 are arranged.
前述のごとく、本発明のタイヤにおいては、従来技術に
つき第２及び３図を用いて説明したバリが接地圧の高い
赤道面近傍には形成されないので、耐クラック性を著し
く向上することが可能となるのである。As described above, in the tire of the present invention, since the burr described in the related art with reference to FIGS. 2 and 3 is not formed in the vicinity of the equatorial plane where the ground contact pressure is high, it is possible to remarkably improve the crack resistance. It will be.
第４図は本発明のタイヤの製造に用いるフルモールドの
一例を示すものであり、このモールドにおいて左右一対
のモールド半部M1，M2はタイヤの赤道面Ｏ−Ｏから軸線
方向にオフセットした位置に合せ面Ｐ′を有している。
なお符号Ｂはブラダーを示すものである。FIG. 4 shows an example of a full mold used for manufacturing the tire of the present invention. In this mold, a pair of left and right mold halves M 1 and M 2 are axially offset from the equatorial plane OO of the tire. It has a mating surface P'in its position.
The symbol B indicates a bladder.
（発明の効果） 本発明の作用効果を確認するため、本発明のタイヤを含
む各種タイヤについて比較試験を行なった。その結果は
次表に示すとおりである。(Effects of the Invention) In order to confirm the effects of the present invention, comparative tests were conducted on various tires including the tire of the present invention. The results are shown in the table below.
クラックの発生テスト法： 本田ＮＳ400Rの後輪に装着し日本自動車研究所谷田部テ
ストコースにおける１周6000ｍの周回路で完全摩耗まで
走行してクラック発生の有無をチェックした。 Test method for crack generation: It was mounted on the rear wheel of Honda NS400R and run to complete wear in a circuit of 6000 m per lap on the Yatabe test course of the Japan Automobile Research Institute to check for the occurrence of cracks.
モールド咬みテスト： 成形後のグリーンタイヤをモールド挿入時に目視により
観察した。Mold bite test: The green tire after molding was visually observed when the mold was inserted.
このテスト結果から明らかなとおり、本発明によれば初
期の目的を充分に達成することが可能となる。As is clear from this test result, according to the present invention, the initial purpose can be sufficiently achieved.
第１図は本発明の一実施例によるタイヤのトレッド部を
示す平面展開図、 第２図及び第３図はそれぞれ従来のタイヤにおける第１
図のII−II線及びIII−III線に相当する部位の断面図、 第４図は本発明のタイヤの製造に用いるフルモールドの
一例を示す断面図である。 M1，M2……フルモールド Ｐ……フルモールドの分割位置 Ｐ′……モールドの分割面 Ｏ……タイヤの赤道面 ｗ……オフセット量FIG. 1 is a plan development view showing a tread portion of a tire according to an embodiment of the present invention, and FIGS. 2 and 3 are first views of a conventional tire, respectively.
FIG. 4 is a sectional view of a portion corresponding to line II-II and line III-III in the figure, and FIG. M 1 , M 2 …… Full mold P …… Full mold division position P ′ …… Mold division surface O …… Equatorial plane of tire w …… Offset amount
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 105:24 Ｂ２９Ｌ 30:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location B29K 105: 24 B29L 30:00 4F
Claims (1)
ルにまたがって延在するトレッド部と、これら各部分を
全体的に補強するカーカスとを具え、前記トレッド部が
前記カーカスの断面輪郭に沿いほぼ均等な肉厚をもって
タイヤの最大幅位置まで延在する広い幅を有し、該トレ
ッドを斜めおよび／または横方向に延在する複数の溝に
よってトレッド要素を画成してなる二輪車用空気入りタ
イヤにおいて、該タイヤは、トレッド上周方向に合せ位
置を有し、かつ軸線方向に分割されるモールドによって
加硫硬化され、前記モールドの合せ位置が、タイヤをリ
ムに組込み、使用内圧を充填し、かつタイヤの赤道面が
路面と垂直をなす姿勢とするとともに、タイヤに使用荷
重を負荷した条件の下で、接地幅の少なくとも２５％の
距離だけタイヤの赤道面から軸線方向にオフセツトされ
た位置にあり、そのモールド合せ位置を示す合せ目をト
レッド上に具えることを特徴とする二輪車用空気入りタ
イヤ。1. A pair of sidewalls, a tread portion extending over both sidewalls, and a carcass that totally reinforces each of the sidewalls, the tread portion being substantially along a cross-sectional contour of the carcass. A pneumatic tire for a two-wheeled vehicle having a wide width extending to the maximum width position of the tire with a uniform wall thickness, and defining the tread element by a plurality of grooves extending diagonally and / or laterally. In, the tire has a fitting position in the tread upper circumferential direction, and is vulcanized and cured by a mold that is divided in the axial direction, the fitting position of the mold, the tire is incorporated into the rim, to fill the internal pressure used, In addition, the equatorial plane of the tire should be in a posture perpendicular to the road surface, and under the condition that the tire is loaded with a working load, at least 25% of the ground contact width should be at least 25% of the width of the tire. Located offset position axially from the road surface, motorcycle pneumatic tire characterized by comprising a seam showing the mold alignment on the tread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60144447A JPH0628860B2 (en) | 1985-07-03 | 1985-07-03 | Pneumatic tires for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60144447A JPH0628860B2 (en) | 1985-07-03 | 1985-07-03 | Pneumatic tires for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS625817A JPS625817A (en) | 1987-01-12 |
| JPH0628860B2 true JPH0628860B2 (en) | 1994-04-20 |
Family
ID=15362441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60144447A Expired - Lifetime JPH0628860B2 (en) | 1985-07-03 | 1985-07-03 | Pneumatic tires for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628860B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110162769A1 (en) * | 2008-06-20 | 2011-07-07 | Mario Mariani | Motorcycle tyre |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4133187B2 (en) | 2002-10-04 | 2008-08-13 | 日本ワイパブレード株式会社 | Wiper blade coupling member and wiper blade |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232077A (en) * | 1975-09-04 | 1977-03-10 | Toyo Tire & Rubber Co | Metal mold for vulcanizing tire |
| JPS5820503A (en) * | 1981-07-29 | 1983-02-07 | Bridgestone Corp | Pneumatic radial tire for motorcycle |
-
1985
- 1985-07-03 JP JP60144447A patent/JPH0628860B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232077A (en) * | 1975-09-04 | 1977-03-10 | Toyo Tire & Rubber Co | Metal mold for vulcanizing tire |
| JPS5820503A (en) * | 1981-07-29 | 1983-02-07 | Bridgestone Corp | Pneumatic radial tire for motorcycle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110162769A1 (en) * | 2008-06-20 | 2011-07-07 | Mario Mariani | Motorcycle tyre |
| US8919397B2 (en) * | 2008-06-20 | 2014-12-30 | Pirelli Tyre S.P.A. | Motorcycle tyre |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS625817A (en) | 1987-01-12 |
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