JPH11170816A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH11170816A JPH11170816A JP9362751A JP36275197A JPH11170816A JP H11170816 A JPH11170816 A JP H11170816A JP 9362751 A JP9362751 A JP 9362751A JP 36275197 A JP36275197 A JP 36275197A JP H11170816 A JPH11170816 A JP H11170816A
- Authority
- JP
- Japan
- Prior art keywords
- block
- tire
- pneumatic tire
- gear
- terrace
- 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
Links
Landscapes
- Tires In General (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、タイヤトレッド部
の外周面にブロック部を有する主としてオフロード用の
自動車等に使用されるいわゆるマッドタイプの空気入り
タイヤにおいて、その沈み込み防止効果及びトラクショ
ン効果の向上に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called mud type pneumatic tire mainly used for off-road vehicles and the like having a block portion on the outer peripheral surface of a tire tread portion. Regarding improvement.
【0002】[0002]
【従来の技術】自動車、特にオフロード車等のように泥
濘面を走行する自動車用のタイヤとしては、タイヤ周面
にブロック部を有するいわゆるマッドタイプといわれて
いる空気入りタイヤが使用されている。2. Description of the Related Art A pneumatic tire called a so-called mud type having a block portion on a tire peripheral surface is used as a tire for an automobile, particularly an automobile running on a mud surface such as an off-road vehicle. .
【0003】このブロック部は、通常タイヤの周方向に
形成された主溝及びタイヤの幅方向に形成された横溝で
囲まれて形成された陸状部である。[0003] The block portion is a land-shaped portion formed by being surrounded by a main groove formed generally in the circumferential direction of the tire and a lateral groove formed in the width direction of the tire.
【0004】このマッドタイプのタイヤは、前記ブロッ
ク部が地面に咬み込むことによって泥濘面や砂地や雪道
等においてもタイヤが空回りすることなく良好に走行で
きるものである。[0004] The mud-type tire is capable of running well on a muddy surface, a sandy ground, a snowy road, or the like without idling by the block portion biting into the ground.
【0005】このような泥濘面等においては走行中にタ
イヤ周面の溝部に泥土や石が挟まれてブロック部が地面
に咬み込む機能が低下し易いため、溝内部の泥土や石が
自然に排出されるセルフクリ−ニング性を高める手段が
講じられている。例えば、タイヤ周面の面積に対する溝
の面積(ボイド比率という)を大きくして泥土や石が排
出されやすく等の手段である。[0005] In such a mud surface or the like, since the mud or stones are caught in the grooves on the tire peripheral surface during running and the function of the block portion biting into the ground is likely to be reduced, the mud or stones inside the grooves are naturally reduced. Means have been taken to enhance the self-cleaning properties that are discharged. For example, the area of the groove (referred to as a void ratio) with respect to the area of the tire peripheral surface is increased so that mud and stones are easily discharged.
【0006】一方、泥濘面では車体の自重によってタイ
ヤが地面に沈み込むこともあるため、このような沈み込
みを防止する手段も必要となる。そこで、タイヤ表面の
ボイド比率を大きくして且つブロック部の側面壁にブロ
ック部表面より内側位置に図6(イ)(ロ)に示すよう
に、タイヤトレッド部の外周面1’のブロック部3’の
一側面にエラ状の台部4’を設けて溝部2a’,2b’
の底部にまで泥土や石が入り込むことを阻止してセルフ
クリ−ニング性を高めつつ沈み込みを抑制する手段等が
図られている。On the other hand, on a mud surface, the tires may sink into the ground due to the weight of the vehicle body, so that means for preventing such sinking is also required. Therefore, the void ratio on the tire surface is increased and the block portion 3 on the outer peripheral surface 1 'of the tire tread portion is provided on the side wall of the block portion at a position inside the surface of the block portion as shown in FIGS. An elastic base 4 'is provided on one side surface of the groove 2a', 2b '.
Means have been designed to prevent mud and stones from entering the bottom of the slab, thereby improving the self-cleaning property and suppressing the sinking.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、上記の
各手段によってセルフクリ−ニング性及び沈み込み防止
性については改良することができても、泥濘面にタイヤ
が沈み込んでしまった場合に、タイヤ周面が地面に咬み
込んで沈み込みから抜け出すトラクション性を向上させ
るための対策は従来不十分であった。However, even if the self-cleaning property and the anti-submersion property can be improved by the above-mentioned means, when the tire submerges on a mud surface, the tire circumference can be improved. Conventionally, measures for improving the traction property in which the surface bites into the ground and gets out of the sink have been insufficient.
【0008】本発明の課題は、沈み込みを防止すると同
時に、トラクション性も向上させることのできる空気入
りタイヤを提供することにある。[0008] An object of the present invention is to provide a pneumatic tire that can prevent sinking and improve traction.
【0009】[0009]
【課題を解決するための手段】前記課題を解決すべく鋭
意研究を重ねた結果、本発明はタイヤトレッド部の外周
面に溝部に囲まれたブロック部を有する空気入りタイヤ
において、前記ブロック部の側周面に、溝部の底面より
外側に形成されたテラス部と該テラス部より外側に突出
され且つ先端部がブロック部表面より内側に位置する突
出部を複数有するギア形状部が設けられた構成を採用す
る。As a result of intensive studies to solve the above-mentioned problems, the present invention provides a pneumatic tire having a block portion surrounded by a groove on the outer peripheral surface of a tire tread portion. A configuration in which a side peripheral surface is provided with a terrace portion formed outside the bottom surface of the groove portion and a gear-shaped portion having a plurality of projection portions projecting outside the terrace portion and having a tip portion located inside the surface of the block portion. Is adopted.
【0010】尚、本発明の溝部とはタイヤトレッド部の
外周面上に刻設されたすべての溝、例えばタイヤ周面の
周方向に刻設された主溝や、タイヤ幅方向に刻設された
横溝等が含まれる。また、本発明のブロック部とは、上
記各溝部に囲まれて形成される陸状部分を指す。さら
に、本発明でいう外側とはタイヤトレッド部の外周面側
を指し、内側とは内面側を指す。The grooves of the present invention are all grooves formed on the outer peripheral surface of the tire tread, for example, a main groove formed in the circumferential direction of the tire circumferential surface, or formed in the tire width direction. Horizontal grooves and the like. Further, the block portion of the present invention refers to a land portion formed by being surrounded by each of the above-mentioned grooves. Further, the outside in the present invention refers to the outer peripheral surface side of the tire tread portion, and the inside refers to the inner surface side.
【0011】かかる、空気入りタイヤは、前記ブロック
部の側面に、溝部底面より外側にテラス部を有するギア
形状部が設けられているため、該テラス部によってタイ
ヤが沈み込むことを防止できると同時に、該テラス部よ
り外側に突出された複数の突出部がブロック部より内側
で地面に咬み込むため、タイヤ周面の剪断力がブロック
部のみ形成された場合より大きくなり、トラクション性
が向上する。Such a pneumatic tire is provided with a gear-shaped portion having a terrace outside the bottom of the groove on the side surface of the block, so that the tire can be prevented from sinking by the terrace. Since the plurality of protrusions protruding outside the terrace portion bite into the ground inside the block portion, the shearing force on the tire peripheral surface becomes greater than when only the block portion is formed, and traction is improved.
【0012】また、前記突出部が、タイヤ本体の外側に
向かって先細に形成された略台形状である場合には、台
形状のギア形状部が地面に対してクサビのように作用す
るため、ギア形状部が地面に咬み易くなる。Further, when the projecting portion has a substantially trapezoidal shape tapered toward the outside of the tire main body, the trapezoidal gear-shaped portion acts on the ground like a wedge. The gear-shaped portion is easily bitten by the ground.
【0013】さらに、前記ギア形状部のテラス部が溝部
底面からブロック部表面までの距離の約1/3に位置
し、且つギア形状部の先端部が約2/3に位置する場合
には、テラス部による沈み込み緩和作用とギア形状部に
よる地面への咬み込み作用が最適な状態で奏される。Further, when the terrace of the gear-shaped portion is located at about 1/3 of the distance from the bottom of the groove to the surface of the block, and the tip of the gear-shaped portion is located at about 2/3, The effect of alleviating the sinking by the terrace and the effect of biting into the ground by the gear-shaped portion are exhibited in an optimal state.
【0014】さらに、前記突出部の前記タイヤ本体使用
時に進行方向となる面が、地面と成す角度が鋭角になる
ような斜面に形成されている場合には、タイヤ本体の使
用時に突出部が地面を引っかけるように回転するため、
より地面を咬み込み易くなる。Further, in the case where the surface of the projecting portion which is in the traveling direction when the tire body is used is formed on an inclined surface such that the angle formed with the ground is acute, the projecting portion is used when the tire body is used. To rotate to catch
It becomes easier to bite the ground.
【0015】[0015]
【発明の実施の形態】本発明の空気入りタイヤの一実施
形態について図面に従って説明する。まず、その構成を
説明する。図1及び図2に示す1はタイヤトレッド部の
外周面である。2は該タイヤトレッド部の外周面1に刻
設された溝部である。該溝部2はタイヤトレッド部の外
周面1の幅方向に刻設された横溝2aとタイヤトレッド
部の外周面1の周方向に刻設された周方向溝2bとから
なる。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the pneumatic tire of the present invention will be described with reference to the drawings. First, the configuration will be described. 1 shown in FIGS. 1 and 2 is an outer peripheral surface of a tire tread portion. Reference numeral 2 denotes a groove formed in the outer peripheral surface 1 of the tire tread. The groove portion 2 comprises a lateral groove 2a formed in the width direction of the outer peripheral surface 1 of the tire tread portion and a circumferential groove 2b formed in the circumferential direction of the outer peripheral surface 1 of the tire tread portion.
【0016】3は該溝部2に囲まれて突状に設けられた
ブロック部である。該ブロック部3のタイヤトレッド部
の外周面1に占める面積であるボイド比率は55%以上
になるように設計されている。Reference numeral 3 denotes a block provided in a protruding manner and surrounded by the groove 2. The void ratio, which is the area occupied by the block portion 3 on the outer peripheral surface 1 of the tire tread portion, is designed to be 55% or more.
【0017】4は該ブロック部3の一側面に突設された
ギア形状部で、該ギア形状部4はブロック部3の側面方
向すなわち図2でしめすX−X線断面のブロック部3を
示す図3、及びこの図3のブロック部3の斜視図である
図4に示すように、複数連設され且つ先端に先端面5を
有する台形状の突出部4aから形成されている。Reference numeral 4 denotes a gear-shaped portion protruding from one side surface of the block portion 3, and the gear-shaped portion 4 shows the block portion 3 in a side surface direction of the block portion 3, that is, a cross section taken along line XX shown in FIG. As shown in FIG. 3 and FIG. 4 which is a perspective view of the block portion 3 in FIG. 3, the block portion 3 is formed of a plurality of trapezoidal protruding portions 4a having a front end surface 5 at the front end.
【0018】尚、本実施形態ではブロック部3の一側面
の中央部に2個、両端部に1/2個ずつ計3個の突出部
4aからギア形状部4を構成したが、ブロック部3の一
側面に設けられる突出部4aの数はこれに限定されるも
のではない。In this embodiment, the gear-shaped portion 4 is composed of three projecting portions 4a, two at the center of one side surface of the block portion 3 and 両 端 at both end portions. The number of protrusions 4a provided on one side is not limited to this.
【0019】ギア形状部4のテラス部4bは、周溝2b
の溝底面2cからブロック部3の表面までの距離tの約
1/3に位置しており、ギア形状部4の各突出部4aの
先端面5は約2/3の位置に形成されている。また、突
出部4aの先端面5の両端部からテラス部4bに亘って
斜面が形成されて、各突出部4aはタイヤ本体の外側に
向かって先細になるように形成されている。The terrace portion 4b of the gear-shaped portion 4 has a circumferential groove 2b.
Is located at approximately 1/3 of the distance t from the groove bottom surface 2c to the surface of the block portion 3, and the distal end surface 5 of each projection 4a of the gear shape portion 4 is formed at approximately 2/3 position. . Further, a slope is formed from both ends of the distal end face 5 of the protruding portion 4a to the terrace portion 4b, and each protruding portion 4a is formed so as to taper toward the outside of the tire body.
【0020】次に、以上のような構成からなるマッドタ
イプの空気入りタイヤを使用する場合について説明す
る。本実施形態のマッドタイプの空気入りタイヤは、主
としてオフロード車等のように泥濘面を走行するのに適
した自動車用のタイヤとして使用される。このような空
気入りタイヤを使用した場合には、砂地やぬかるみ等の
泥濘面を走行する際にも、タイヤトレッド部の外周面に
設けられたブロック部3が地面を咬み込むため、スリッ
プすることなく走行できる。Next, a case in which a mud-type pneumatic tire having the above configuration is used will be described. The mud type pneumatic tire of the present embodiment is mainly used as an automobile tire suitable for traveling on a muddy surface such as an off-road vehicle. When such a pneumatic tire is used, the block 3 provided on the outer peripheral surface of the tire tread bites the ground even when traveling on a mud surface such as sandy ground or muddy, so that the tire slips. I can run without.
【0021】また、ブロック部3の表面3aより内側に
位置するギア形状部4のテラス部4bによってテラス部
4bより内側に沈み込むことを防止できる。Further, it is possible to prevent the gear portion 4 from sinking inward from the terrace portion 4b by the terrace portion 4b of the gear portion 4 located inside the surface 3a of the block portion 3.
【0022】さらに、たとえタイヤ本体が地面に沈み込
んだ場合にも、ギア形状部4の突出部4aがブロック部
3の内側に設けられているので、ブロック部3表面より
さらに内側において複数の突出部4aが地面に咬み込み
タイヤトレッド部の外周面1の剪断力が向上し、沈み込
みから容易に脱出することができる。Further, even when the tire body sinks into the ground, the projections 4a of the gear-shaped portion 4 are provided inside the block portion 3, so that a plurality of projections are provided further inside the surface of the block portion 3. The portion 4a bites into the ground, the shearing force of the outer peripheral surface 1 of the tire tread portion is improved, and the tire 4 can easily escape from the sink.
【0023】また、本実施形態のギア形状部4の突出部
4aはテラス部4bから先端部に向かって先細の形状に
形成されているため、地面に対してクサビのようにくい
込み易く、より沈み込みから脱出するトラクション効果
の向上が図れる。Further, since the protruding portion 4a of the gear-shaped portion 4 of the present embodiment is formed in a tapered shape from the terrace portion 4b toward the front end portion, it is easy to penetrate into the ground like a wedge and sinks more. This improves the traction effect of escaping from the indentation.
【0024】さらに走行時のギア形状部4の位置は、タ
イヤの側面方向からタイヤの一部を破断した状態でみる
と図5(イ)に示すようになるが、このとき、突出部4
aの進行方向側の斜面と地面の成す角度αは、図5
(イ)のB部拡大図である図5(ロ)に示すように、鋭
角になるため、地面を引っかけるようにして回転するこ
とになる。Further, the position of the gear-shaped portion 4 during running is as shown in FIG. 5A when a part of the tire is broken from the side of the tire.
The angle α between the slope on the traveling direction side of a and the ground is shown in FIG.
As shown in FIG. 5B, which is an enlarged view of the portion B in FIG.
【0025】従って、より泥濘面のおいて地面を咬み込
む機能が向上するため、走行が良好にできると同時に、
沈み込みが生じた場合にも容易に脱出することができ
る。Therefore, the function of biting the ground on a mud surface is improved, so that the vehicle can run well and at the same time,
Even when subduction occurs, it can easily escape.
【0026】尚、上記実施形態ではギア形状部4の突出
部4aを先端部に先端面5を有する略台形状に形成した
が、突出部4aの形状はこれに限定するものではなく、
要は、タイヤ本体が沈み込んだ時にブロック部3より内
側で地面に咬み込むことができるような外側に突出する
形状であればどのような形状であってもよい。In the above embodiment, the protruding portion 4a of the gear-shaped portion 4 is formed in a substantially trapezoidal shape having a front end surface 5 at the front end. However, the shape of the protruding portion 4a is not limited to this.
In short, any shape may be used as long as the shape protrudes outward so that the tire body can bite into the ground inside the block portion 3 when the tire body sinks.
【0027】また、上記実施形態では突出部4aをブロ
ック部3の一側面に計3個形成したが、突出部4aの数
もこれに限定するものではない。但し、突出部4aの数
があまり少ないと地面に咬み込む作用が効果的に得られ
ないため、ブロック部3の一側面につき3個以上は形成
されることが好ましい。In the above embodiment, a total of three protruding portions 4a are formed on one side surface of the block portion 3, but the number of protruding portions 4a is not limited to this. However, if the number of the protruding portions 4a is too small, the effect of biting into the ground cannot be obtained effectively. Therefore, it is preferable to form three or more per side surface of the block portion 3.
【0028】また、上記実施形態では、前記ギア形状部
4のテラス部4bが溝部2の底面からブロック部表面3
aまでの距離の約1/3に位置し、且つ突出部4aの先端
面5が約2/3に位置するように形成したが、テラス部
及び突出部の形成位置はこれに限定されるものではな
い。Further, in the above embodiment, the terrace portion 4b of the gear-shaped portion 4 extends from the bottom surface of the groove portion 2 to the block surface 3
It is formed so that it is located at about 1/3 of the distance to a and the tip surface 5 of the projection 4a is located at about 2/3, but the formation positions of the terrace and the projection are not limited to this. is not.
【0029】さらに、上記実施形態ではブロック部3の
一側面にのみギア形状部4を形成したが、ギア形状部4
の設けられる位置はこれに限定されるものではなく、た
とえばブロック部3の二以上の各側面壁に上記実施形態
のようなギア形状部を設けてもよい。Further, in the above embodiment, the gear-shaped portion 4 is formed only on one side surface of the block portion 3;
The position at which is provided is not limited to this. For example, a gear-shaped portion as in the above embodiment may be provided on each of two or more side walls of the block portion 3.
【0030】また、ブロック部3の形状や数なども上記
実施形態に限定されるものではなく、通常使用されてい
るブロックパターンであれば適宜選択して使用すること
ができる。The shape and number of the block portions 3 are not limited to those in the above-described embodiment, and any commonly used block pattern can be appropriately selected and used.
【0031】[0031]
【発明の効果】上述のように、本発明は、沈み込みを防
止すると同時にトラクション効果も向上させることがで
き、泥濘面においても良好に走行できる優れたマッドタ
イプの空気入りタイヤを提供できる。As described above, the present invention can provide an excellent mud-type pneumatic tire that can prevent sinking and at the same time improve traction effect and can run well on muddy surfaces.
【図1】本発明の空気入りタイヤの一実施形態例を示す
タイヤトレッド部の外周面の正面図。FIG. 1 is a front view of an outer peripheral surface of a tire tread portion showing an embodiment of a pneumatic tire according to the present invention.
【図2】図1に示すA部を拡大した要部拡大正面図。FIG. 2 is an enlarged front view of a main part in which a portion A shown in FIG. 1 is enlarged.
【図3】図2のX−X線断面図FIG. 3 is a sectional view taken along line XX of FIG. 2;
【図4】本発明の空気入りタイヤに係るギア形状部をブ
ロック部側面方向からみた状態をしめす要部拡大斜視
図。FIG. 4 is an enlarged perspective view of a main part of the pneumatic tire according to the present invention, showing a gear-shaped portion viewed from the side of the block portion.
【図5】(イ)は本発明の空気入りタイヤのタイヤトレ
ッド部の外周面を示す正面図、(ロ)は(イ)に示すB
部を拡大した要部拡大一部断面図。5A is a front view showing an outer peripheral surface of a tire tread portion of the pneumatic tire of the present invention, and FIG. 5B is a view B shown in FIG.
FIG. 3 is an enlarged partial cross-sectional view of a main part in which a part is enlarged.
【図6】(イ)は従来の空気入りタイヤのタイヤトレッ
ド部の外周面をしめす正面図、(ロ)は(イ)にしめす
X’−X’線で破断した状態のブロック部及びエラ状の
台部をしめす拡大断面図。FIG. 6A is a front view showing an outer peripheral surface of a tire tread portion of a conventional pneumatic tire, and FIG. 6B is a block portion and an elliptical shape broken along line X′-X ′ shown in FIG. FIG. 3 is an enlarged cross-sectional view showing a pedestal.
1 タイヤトレッド部の外周面 2 溝部 2a 横溝 2b 周方向溝 2c 溝底面 3 ブロック部 4 ギア形状部 4a 突出部 4b テラス部 5 先端面 DESCRIPTION OF SYMBOLS 1 Outer peripheral surface of tire tread part 2 Groove part 2a Lateral groove 2b Circumferential groove 2c Groove bottom 3 Block part 4 Gear shape part 4a Projection part 4b Terrace part 5 Tip surface
Claims (4)
れたブロック部を有する空気入りタイヤにおいて、前記
ブロック部の側周面に、溝部の底面より外側に形成され
たテラス部と該テラス部より外側に突出され且つ先端部
がブロック部表面より内側に位置する突出部を複数有す
るギア形状部が設けられたことを特徴とする空気入りタ
イヤ。1. A pneumatic tire having a block portion surrounded by a groove on an outer peripheral surface of a tire tread portion, a terrace portion formed on a side peripheral surface of the block portion outside a bottom surface of the groove portion, and the terrace portion. A pneumatic tire provided with a gear-shaped portion having a plurality of protruding portions projecting more outward and having a tip portion located inside a surface of the block portion.
された略台形状である請求項1に記載の空気入りタイ
ヤ。2. The pneumatic tire according to claim 1, wherein the protrusion has a substantially trapezoidal shape tapered outward.
からブロック表面までの約1/3の位置に形成され、且
つ前記突出部の先端部が約2/3の位置に形成された請
求項1又は請求項2に記載の空気入りタイヤ。3. The gear-shaped portion has a terrace portion formed at a position approximately one-third from a bottom surface of the groove portion to a block surface, and a tip portion of the protruding portion formed at a position approximately two-thirds. The pneumatic tire according to claim 1 or 2.
方向側となる面が、該面と地面と成す角度が鋭角になる
ような斜面に形成されている請求項1乃至請求項3のい
ずれかに記載の空気入りタイヤ。4. A surface according to claim 1, wherein the surface of the protrusion that is on the side of the traveling direction when the tire body is used is formed such that the angle between the surface and the ground is acute. The pneumatic tire described in Crab.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36275197A JP3935254B2 (en) | 1997-12-12 | 1997-12-12 | Pneumatic tire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36275197A JP3935254B2 (en) | 1997-12-12 | 1997-12-12 | Pneumatic tire |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11170816A true JPH11170816A (en) | 1999-06-29 |
JP3935254B2 JP3935254B2 (en) | 2007-06-20 |
Family
ID=18477649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP36275197A Expired - Lifetime JP3935254B2 (en) | 1997-12-12 | 1997-12-12 | Pneumatic tire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3935254B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007058162A1 (en) * | 2005-11-16 | 2007-05-24 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
JP2007283943A (en) * | 2006-04-18 | 2007-11-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
JP2010120427A (en) * | 2008-11-17 | 2010-06-03 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
JP2012096783A (en) * | 2010-10-29 | 2012-05-24 | Goodyear Tire & Rubber Co:The | Gripping edge of winter tire |
-
1997
- 1997-12-12 JP JP36275197A patent/JP3935254B2/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007058162A1 (en) * | 2005-11-16 | 2007-05-24 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
US8225831B2 (en) | 2005-11-16 | 2012-07-24 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
JP2007283943A (en) * | 2006-04-18 | 2007-11-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
JP2010120427A (en) * | 2008-11-17 | 2010-06-03 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
JP2012096783A (en) * | 2010-10-29 | 2012-05-24 | Goodyear Tire & Rubber Co:The | Gripping edge of winter tire |
Also Published As
Publication number | Publication date |
---|---|
JP3935254B2 (en) | 2007-06-20 |
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