JP3642646B2 - Heavy duty studless tire - Google Patents

Heavy duty studless tire Download PDF

Info

Publication number
JP3642646B2
JP3642646B2 JP00794597A JP794597A JP3642646B2 JP 3642646 B2 JP3642646 B2 JP 3642646B2 JP 00794597 A JP00794597 A JP 00794597A JP 794597 A JP794597 A JP 794597A JP 3642646 B2 JP3642646 B2 JP 3642646B2
Authority
JP
Japan
Prior art keywords
block
tire
sipe
closed
circumferential direction
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 - Fee Related
Application number
JP00794597A
Other languages
Japanese (ja)
Other versions
JPH10203121A (en
Inventor
啓太 良知
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.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
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 Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Priority to JP00794597A priority Critical patent/JP3642646B2/en
Publication of JPH10203121A publication Critical patent/JPH10203121A/en
Application granted granted Critical
Publication of JP3642646B2 publication Critical patent/JP3642646B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • B60C2011/1254—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern with closed sipe, i.e. not extending to a groove

Description

【０００１】
【発明の属する技術分野】
本発明は、ブロックパターンを有する重荷重用スタッドレスタイヤに関し、さらに詳しくは、耐偏摩耗性を確保しながら、氷上性能を向上するようにした重荷重用スタッドレスタイヤに関する。
【０００２】
【従来の技術】
ブロックパターンを有する重荷重用スタッドレスタイヤにおいて、ブロックにタイヤ幅方向に延びるサイプを設けることにより、サイプのエッジ効果によって氷上性能を確保するようにしている。このサイプとしては、図４（ａ）に示すようにブロック４のタイヤ幅方向に延びて両端部が溝に連通する開口サイプ５と、図５（ａ）に示すように両端部が溝に連通しないで閉塞した閉口サイプ６とがある。
【０００３】
このような重荷重用スタッドレスタイヤでは、ブロック４に重荷重下でタイヤ周方向に強い剪断力が作用する。このため、ブロック４に開口サイプ５だけを設け、単にサイプ数を多くすると、開口サイプ５によるエッジ効果が向上するものの、ブロック剛性が極端に低下し、図４（ｂ）のようにブロック４の倒れ込み量が過大となり、図４（ｃ）のように接地圧分布が不均一になるので、ブロック４にヒールアンドトウ摩耗を生じやすくなるという問題があった。
【０００４】
一方、ブロック４に閉口サイプ６だけを設けると、ブロック剛性が低下しにくく、図５（ｂ）のようにブロック４の倒れ込み量が少なくなり、図５（ｃ）のように接地圧分布が均一になるものの、開口サイプ５のようなエッジ効果が得られなくなるので、十分な氷上性能を得ることができなかった。
【０００５】
【発明が解決しようとする課題】
本発明の目的は、耐偏摩耗性を確保しながら、氷上性能を向上することを可能にした重荷重用スタッドレスタイヤを提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するための本発明の重荷重用スタッドレスタイヤは、トレッドに溝によって複数のブロックを分割形成し、該ブロックのタイヤ周方向中央部にタイヤ幅方向に延びて両端部が前記溝に連通する少なくとも１本の開口サイプを設けると共に、該開口サイプのタイヤ周方向前後にそれぞれタイヤ幅方向に延びて両端部が閉塞した少なくとも２本の閉口サイプを設け、これら閉口サイプの長さをタイヤ周方向中央側から前後方向に向けて徐々に短くしたことを特徴とするものである。
【０００７】
このようにブロックのタイヤ周方向中央部にタイヤ幅方向に延びて両端部が前記溝に連通する少なくとも１本の開口サイプを設けると共に、開口サイプのタイヤ周方向前後にそれぞれタイヤ幅方向に延びて両端部が閉塞した少なくとも２本の閉口サイプを設け、これら閉口サイプの長さをタイヤ周方向中央側から前後方向に向けて徐々に短くすることにより、開口サイプによるエッジ効果と、閉口サイプによるブロック接地圧分布の均一化効果とを同時に得るようにしたので、耐偏摩耗性を確保しながら、氷上性能を向上することができる。
【０００８】
特に、上述のように閉口サイプの長さをタイヤ周方向中央側から前後方向に向けて徐々に短くすると、ブロック剛性を極度に低下させることなく、ブロック接地圧分布の均一化効果を高めることができるので、これが耐偏摩耗性の向上に寄与し、しかもブロック接地圧分布の均一化に伴うブロックの粘着効果によって氷上性能を更に向上するようになる。
【０００９】
【発明の実施の形態】
以下、本発明の構成について添付の図面を参照して詳細に説明する。
図１は、本発明の実施形態からなる重荷重用スタッドレスタイヤのトレッドパターンを例示するものである。図１において、トレッド１にはタイヤ周方向に延びる複数本の主溝２と、タイヤ幅方向に延びる複数本の横溝３が設けられており、これら主溝２及び横溝３によって複数のブロック４が分割形成されている。
【００１０】
図２のブロック拡大図に示すように、ブロック４のタイヤ周方向中央部には、タイヤ幅方向に延びて両端部が両側の主溝２に連通する１本の開口サイプ５が設けられている。この開口サイプ５は少なくとも１本設けてあればよいが、２本を超えるとブロック剛性の低下が過大になるので、その上限を２本とすることが好ましい。
【００１１】
また、開口サイプ５のタイヤ周方向前後には、それぞれタイヤ幅方向に延びて両端部が主溝２に連通しないで閉塞した２本の閉口サイプ６が設けられている。これら閉口サイプ６の長さは、タイヤ周方向中央側から前後方向に向けて徐々に短くなっている。すなわち、タイヤ周方向中央側に位置する閉口サイプ６の長さＷ1 よりも、その外側に位置する閉口サイプ６の長さＷ2 のほうが短くなっている。
【００１２】
また、閉口サイプ６をタイヤ周方向中央側から片側にｎ本設ける場合は、その長さＷ1 〜Ｗn がＷ1 ＞Ｗ2 ＞・・・＞Ｗn の関係を満足するようにする。閉口サイプ６はブロック４のタイヤ周方向中央側から片側に少なくとも２本設けてあればよいが、５本を超えるとブロック剛性の低下が過大になるので、その上限を５本とすることが好ましい。
【００１３】
上述のようにブロック４のタイヤ周方向中央部に少なくとも１本の開口サイプ５を設けると共に、開口サイプ５のタイヤ周方向前後に少なくとも２本の閉口サイプ６を設け、これら閉口サイプ６の長さをタイヤ周方向中央側から前後方向に向けて徐々に短くすることにより、開口サイプ５によるエッジ効果と、閉口サイプ６によるブロック接地圧の均一化効果とを同時に得ることができる。
【００１４】
すなわち、図３（ａ）のようなブロック４では、重荷重下でタイヤ周方向に強い剪断力が作用すると、図３（ｂ）のようにブロック４が倒れ込む。このとき、ブロック４は、開口サイプ５と閉口サイプ６とを組み合わせて有しているので、ブロック剛性が極端に低下することはなく、開口サイプ５によるエッジ効果を有効に得ることができる。
【００１５】
しかも、閉口サイプ６の長さはタイヤ周方向中央側から前後方向に向けて徐々に短くなっているので、図３（ｃ）のようにブロック４における接地圧分布を均一化することができる。このようにブロック４の接地圧分布を均一化することにより、ヒールアンドトウ摩耗に対する耐偏摩耗性が向上し、しかもブロックの粘着効果によって氷上性能を更に向上することができる。
【００１６】
従って、ブロック４に開口サイプ５と閉口サイプ６とを組み合わせて上述のように配置することにより、耐偏摩耗性を確保しながら、高い氷上性能を得ることが可能になる。
なお、本発明において、上述の実施形態では開口サイプ５及び閉口サイプ６の平面視形状が直線状になっているが、これらの平面視形状は特に限定されることはなく、ジグザグ状や波状に形成するようにしてもよい。
【００１７】
【実施例】
タイヤサイズを１１Ｒ２２．５とし、図１のブロックパターンを有し、各ブロックに図２のように開口サイプと閉口サイプを設け、この閉口サイプの長さＷ1 ，Ｗ2 だけを種々異ならせた本発明タイヤ及び比較タイヤ１，２と、ブロックにサイプを設けていない従来タイヤとを製作した。なお、各ブロックの高さは１４ｍｍとし、各サイプの深さは１０ｍｍとした。
【００１８】
これら試験タイヤについて、下記の試験方法により氷上性能及び耐偏摩耗性を評価し、その結果を表１に示した。
氷上性能：
試験タイヤを空気圧７００ｋＰａとしてトラックに装着し、凍結した路面上で速度４０ｋｍ／ｈでの走行状態から制動した場合の制動距離を測定した。測定結果は、従来タイヤの測定値の逆数を１００とする指数で示した。この指数値が大きいほど氷上性能が優れている。
【００１９】
耐偏摩耗性：
試験タイヤを空気圧７００ｋＰａとしてトラックに装着し、乾燥路面上で２万ｋｍ走行した後、ブロックに発生したヒールアンドトウ摩耗による偏摩耗量（ブロックの段差量）を測定した。測定結果は、従来タイヤの測定値の逆数を１００とする指数で示した。この指数値が大きいほど耐偏摩耗性が優れている。
【００２０】
表１

Figure 0003642646
【００２１】
この表１から明らかなように、本発明タイヤは、従来タイヤと同等の耐偏摩耗性を維持しながら、氷上性能を大幅に向上することができた。一方、閉口サイプの長さＷ1 ，Ｗ2 を同一にした比較タイヤ１は、従来タイヤに比べて氷上性能が若干向上していたものの、耐偏摩耗性が低下していた。また、閉口サイプの長さＷ2 を長さＷ1 よりも大きくした比較タイヤ２は、ブロック剛性のバランスが悪いため、氷上性能及び耐偏摩耗性が共に低下していた。
【００２２】
【発明の効果】
以上説明したように本発明によれば、トレッドに溝によって複数のブロックを分割形成し、ブロックのタイヤ周方向中央部にタイヤ幅方向に延びて両端部が前記溝に連通する少なくとも１本の開口サイプを設けると共に、開口サイプのタイヤ周方向前後にそれぞれタイヤ幅方向に延びて両端部が閉塞した少なくとも２本の閉口サイプを設け、これら閉口サイプの長さをタイヤ周方向中央側から前後方向に向けて徐々に短くしたから、開口サイプによるエッジ効果と、閉口サイプによるブロック接地圧分布の均一化効果とを同時に得ることができ、耐偏摩耗性を確保しながら、氷上性能を向上することができる。
【図面の簡単な説明】
【図１】本発明の重荷重用スタッドレスタイヤのトレッドパターンを例示する展開図である。
【図２】図１のブロックを示す拡大図である。
【図３】（ａ）は開口サイプと閉口サイプを設けたブロックの斜視図、（ｂ）はそのブロックの剪断力に対する動きを示す側面図、（ｃ）はそのブロックの接地圧分布を示す図ある。
【図４】（ａ）は開口サイプだけを設けたブロックの斜視図、（ｂ）はそのブロックの剪断力に対する動きを示す側面図、（ｃ）はそのブロックの接地圧分布を示す図ある。
【図５】（ａ）は閉口サイプだけを設けたブロックの斜視図、（ｂ）はそのブロックの剪断力に対する動きを示す側面図、（ｃ）はそのブロックの接地圧分布を示す図ある。
【符号の説明】
１ トレッド
２ 主溝
３ 横溝
４ ブロック
５ 開口サイプ
６ 閉口サイプ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heavy load studless tire having a block pattern, and more particularly to a heavy load studless tire that improves on-ice performance while ensuring uneven wear resistance.
[0002]
[Prior art]
In a heavy duty studless tire having a block pattern, a sipe extending in the tire width direction is provided on the block, thereby ensuring on-ice performance by the edge effect of the sipe. As shown in FIG. 4A, the sipe includes an open sipe 5 that extends in the tire width direction of the block 4 and communicates with the grooves at both ends as shown in FIG. 4A, and both ends communicate with the grooves as shown in FIG. 5A. There is a closed sipe 6 that is closed without being closed.
[0003]
In such a heavy load studless tire, a strong shearing force acts on the block 4 in the tire circumferential direction under a heavy load. For this reason, if only the opening sipe 5 is provided in the block 4 and the number of sipes is simply increased, the edge effect by the opening sipe 5 is improved, but the block rigidity is extremely reduced, and the block 4 has a shape as shown in FIG. Since the amount of collapse is excessive and the contact pressure distribution becomes non-uniform as shown in FIG. 4C, there is a problem that heel and toe wear tends to occur in the block 4.
[0004]
On the other hand, if only the closed sipe 6 is provided in the block 4, the block rigidity is not easily lowered, the amount of collapse of the block 4 is reduced as shown in FIG. 5 (b), and the contact pressure distribution is uniform as shown in FIG. 5 (c). However, since the edge effect as in the opening sipe 5 cannot be obtained, sufficient performance on ice cannot be obtained.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a heavy-duty studless tire capable of improving performance on ice while ensuring uneven wear resistance.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the heavy duty studless tire according to the present invention has a tread having a plurality of blocks divided by grooves, extending in the tire width direction at the center of the tire in the tire circumferential direction, and both ends communicating with the grooves. And at least two closed sipes that extend in the tire width direction and are closed at both ends before and after the opening sipe in the tire circumferential direction. It is characterized by being gradually shortened from the center of the direction toward the front-rear direction.
[0007]
As described above, at least one opening sipe extending in the tire width direction at the center portion in the tire circumferential direction of the block and having both ends communicating with the groove is provided, and extends in the tire width direction before and after the tire sipe in the tire circumferential direction. By providing at least two closed sipes closed at both ends and gradually shortening the length of these closed sipes from the center in the tire circumferential direction toward the front-rear direction, the edge effect by the open sipes and the block by the closed sipes Since the effect of uniforming the contact pressure distribution is obtained at the same time, it is possible to improve the performance on ice while ensuring uneven wear resistance.
[0008]
In particular, when the length of the closed sipe is gradually shortened from the tire circumferential center side in the front-rear direction as described above, the effect of uniformizing the block contact pressure distribution can be enhanced without extremely reducing the block rigidity. Therefore, this contributes to the improvement of uneven wear resistance, and the performance on ice is further improved by the adhesive effect of the block accompanying the uniform distribution of the block contact pressure.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 illustrates a tread pattern of a heavy duty studless tire according to an embodiment of the present invention. In FIG. 1, the tread 1 is provided with a plurality of main grooves 2 extending in the tire circumferential direction and a plurality of lateral grooves 3 extending in the tire width direction. The plurality of blocks 4 are formed by the main grooves 2 and the lateral grooves 3. It is divided and formed.
[0010]
As shown in the enlarged block diagram of FIG. 2, a single opening sipe 5 extending in the tire width direction and having both end portions communicating with the main grooves 2 on both sides is provided in the tire circumferential direction center portion of the block 4. . It is sufficient that at least one opening sipe 5 is provided, but if the number exceeds two, the block rigidity is excessively lowered. Therefore, the upper limit is preferably set to two.
[0011]
Further, two closed sipes 6 that extend in the tire width direction and are closed without communicating with the main groove 2 are provided on the front and rear sides of the opening sipe 5 in the tire circumferential direction. The lengths of these closed sipes 6 are gradually shortened from the center in the tire circumferential direction toward the front-rear direction. In other words, than the length W 1 of the closed sipe 6 located in the tire circumferential direction central side, towards the length W 2 of the closed sipes 6 located outside is shorter.
[0012]
Also, if n pieces provided on one side of the closed sipe 6 from the tire circumferential direction central side, the length W 1 to W-n is to satisfy the relationship of W 1> W 2>···> W n. It is sufficient that at least two closed sipes 6 are provided on one side from the center side in the tire circumferential direction of the block 4, but if the number exceeds five, the block rigidity is excessively lowered. Therefore, the upper limit is preferably set to five. .
[0013]
As described above, at least one open sipe 5 is provided at the center in the tire circumferential direction of the block 4, and at least two closed sipes 6 are provided before and after the open sipe 5 in the tire circumferential direction. By gradually shortening from the center in the tire circumferential direction toward the front-rear direction, an edge effect by the opening sipe 5 and an effect of equalizing the block contact pressure by the closing sipe 6 can be obtained simultaneously.
[0014]
That is, in the block 4 as shown in FIG. 3A, when a strong shearing force acts in the tire circumferential direction under heavy load, the block 4 falls down as shown in FIG. At this time, since the block 4 has a combination of the opening sipe 5 and the closing sipe 6, the block rigidity is not extremely lowered, and the edge effect by the opening sipe 5 can be effectively obtained.
[0015]
Moreover, since the length of the closed sipe 6 is gradually shortened from the center side in the tire circumferential direction toward the front-rear direction, the contact pressure distribution in the block 4 can be made uniform as shown in FIG. By making the contact pressure distribution of the block 4 uniform in this way, uneven wear resistance against heel and toe wear can be improved, and the performance on ice can be further improved by the adhesive effect of the block.
[0016]
Accordingly, by combining the opening sipe 5 and the closed sipe 6 in the block 4 and arranging them as described above, it is possible to obtain high performance on ice while ensuring uneven wear resistance.
In the present invention, in the above-described embodiment, the planar view shapes of the opening sipe 5 and the closed sipe 6 are linear, but these planar view shapes are not particularly limited, and may be zigzag or wavy. You may make it form.
[0017]
【Example】
The tire size is 11R22.5, the block pattern of FIG. 1 is provided, each block is provided with an opening sipe and a closing sipe as shown in FIG. 2, and only the lengths W 1 and W 2 of the closing sipe are varied. The tire of the present invention and comparative tires 1 and 2 and a conventional tire without a sipe provided on the block were produced. The height of each block was 14 mm, and the depth of each sipe was 10 mm.
[0018]
These test tires were evaluated on ice performance and uneven wear resistance by the following test methods, and the results are shown in Table 1.
On-ice performance:
The test tire was mounted on a truck with an air pressure of 700 kPa, and the braking distance was measured when braking was performed from a traveling state at a speed of 40 km / h on a frozen road surface. The measurement results are shown as an index with the reciprocal of the measured value of the conventional tire as 100. The larger the index value, the better the performance on ice.
[0019]
Uneven wear resistance:
The test tire was mounted on a truck with an air pressure of 700 kPa, traveled 20,000 km on a dry road surface, and then the amount of uneven wear due to heel and toe wear generated on the block (block step amount) was measured. The measurement results are shown as an index with the reciprocal of the measured value of the conventional tire as 100. The larger the index value, the better the uneven wear resistance.
[0020]
Table 1
Figure 0003642646
[0021]
As apparent from Table 1, the tire of the present invention was able to greatly improve the performance on ice while maintaining the uneven wear resistance equivalent to that of the conventional tire. On the other hand, the comparative tire 1 in which the lengths W 1 and W 2 of the closed sipe were the same was slightly improved in ice performance as compared with the conventional tire, but the uneven wear resistance was lowered. The comparison tire 2 which is greater than the length W 1 of the length W 2 of the closed sipe has poor balance of the block rigidity, performance on ice and the uneven wear resistance was reduced together.
[0022]
【The invention's effect】
As described above, according to the present invention, a plurality of blocks are dividedly formed in the tread by the groove, and at least one opening that extends in the tire width direction at the tire circumferential direction center portion of the block and communicates with the groove at both ends. In addition to providing sipes, at least two closed sipes extending in the tire width direction and closed at both ends in the tire circumferential direction of the opening sipe are provided, and the lengths of these closed sipes are increased in the front-rear direction from the center in the tire circumferential direction. The edge effect due to the opening sipe and the effect of equalizing the block contact pressure distribution due to the closed sipe can be obtained at the same time, improving on-ice performance while ensuring uneven wear resistance. it can.
[Brief description of the drawings]
FIG. 1 is a development view illustrating a tread pattern of a studless tire for heavy load according to the present invention.
FIG. 2 is an enlarged view showing the block of FIG. 1;
3A is a perspective view of a block provided with an open sipe and a closed sipe, FIG. 3B is a side view showing the movement of the block with respect to a shearing force, and FIG. 3C is a diagram showing a ground pressure distribution of the block. is there.
4A is a perspective view of a block provided with only an opening sipe, FIG. 4B is a side view showing the movement of the block with respect to a shearing force, and FIG. 4C is a diagram showing a ground pressure distribution of the block.
5A is a perspective view of a block provided with only a closed sipe, FIG. 5B is a side view showing the movement of the block with respect to a shearing force, and FIG. 5C is a diagram showing a ground pressure distribution of the block.
[Explanation of symbols]
1 Tread 2 Main groove 3 Horizontal groove 4 Block 5 Open sipe 6 Closed sipe

Claims (1)

トレッドに溝によって複数のブロックを分割形成し、該ブロックのタイヤ周方向中央部にタイヤ幅方向に延びて両端部が前記溝に連通する少なくとも１本の開口サイプを設けると共に、該開口サイプのタイヤ周方向前後にそれぞれタイヤ幅方向に延びて両端部が閉塞した少なくとも２本の閉口サイプを設け、これら閉口サイプの長さをタイヤ周方向中央側から前後方向に向けて徐々に短くした重荷重用スタッドレスタイヤ。A plurality of blocks are dividedly formed in the tread by grooves, and at least one opening sipe extending in the tire width direction and having both ends communicating with the groove is provided at the center in the tire circumferential direction of the block, and the tire of the opening sipe At least two closed sipes that extend in the tire width direction at the front and rear in the circumferential direction and that are closed at both ends are provided, and the length of these closed sipes are gradually shortened from the center in the tire circumferential direction toward the front and rear. tire.
JP00794597A 1997-01-20 1997-01-20 Heavy duty studless tire Expired - Fee Related JP3642646B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP00794597A JP3642646B2 (en) 1997-01-20 1997-01-20 Heavy duty studless tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP00794597A JP3642646B2 (en) 1997-01-20 1997-01-20 Heavy duty studless tire

Publications (2)

Publication Number Publication Date
JPH10203121A JPH10203121A (en) 1998-08-04
JP3642646B2 true JP3642646B2 (en) 2005-04-27

Family

ID=11679643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP00794597A Expired - Fee Related JP3642646B2 (en) 1997-01-20 1997-01-20 Heavy duty studless tire

Country Status (1)

Country Link
JP (1) JP3642646B2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4306847B2 (en) * 1998-11-24 2009-08-05 住友ゴム工業株式会社 Pneumatic tire
DE60018813T2 (en) * 1999-01-13 2006-03-30 Bridgestone Corp. Tires with excellent steering stability
ATE231445T1 (en) * 1999-06-28 2003-02-15 Michelin Soc Tech TREAD PROFILE SUITABLE FOR LIMITING THE NOISE PRODUCED BY THE RUN OF THE TIRE
JP4487124B2 (en) * 2004-06-21 2010-06-23 横浜ゴム株式会社 Pneumatic tire and tire mold
JP4299745B2 (en) * 2004-08-12 2009-07-22 住友ゴム工業株式会社 Pneumatic tire
JP4750398B2 (en) * 2004-10-04 2011-08-17 株式会社ブリヂストン Pneumatic tire
JP4715890B2 (en) * 2008-09-10 2011-07-06 横浜ゴム株式会社 Pneumatic tire
WO2010084848A1 (en) * 2009-01-20 2010-07-29 株式会社ブリヂストン Tire
JP5532696B2 (en) * 2009-06-19 2014-06-25 横浜ゴム株式会社 Pneumatic tire
JP5398421B2 (en) * 2009-08-24 2014-01-29 株式会社ブリヂストン tire
FR2962372B1 (en) * 2010-07-06 2014-05-02 Michelin Soc Tech BEARING BAND PROTECTION DEVICE
JP5790166B2 (en) * 2011-06-02 2015-10-07 横浜ゴム株式会社 Pneumatic tire
JP6819228B2 (en) * 2016-11-07 2021-01-27 住友ゴム工業株式会社 tire
JP6891454B2 (en) * 2016-11-07 2021-06-18 住友ゴム工業株式会社 tire

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02241806A (en) * 1989-03-15 1990-09-26 Bridgestone Corp Pneumatic tire having sipes with gap difference and sipe forming blade of tire mold
JP3586885B2 (en) * 1994-04-28 2004-11-10 東洋ゴム工業株式会社 studless tire
JPH07329517A (en) * 1994-06-13 1995-12-19 Toyo Tire & Rubber Co Ltd Pneumatic radial tire
JP3588389B2 (en) * 1994-11-17 2004-11-10 株式会社ブリヂストン Heavy duty pneumatic tires

Also Published As

Publication number Publication date
JPH10203121A (en) 1998-08-04

Similar Documents

Publication Publication Date Title
JP3642646B2 (en) Heavy duty studless tire
JP3636253B2 (en) Mold for vulcanizing pneumatic tires
JP4397956B1 (en) Pneumatic tire
JP3180160B2 (en) studless tire
JP3869102B2 (en) Pneumatic tire
EP0715973B1 (en) Ice/snow road-running pneumatic tires
JP4441949B2 (en) Pneumatic tire
JP3359000B2 (en) Pneumatic tire
JP2001191739A (en) Pneumatic tire
JPH06143941A (en) Pneumatic tire
JP3837235B2 (en) Heavy duty studless tire
US8844591B2 (en) Pneumatic tire
JP2000219015A (en) Pneumatic tire
JP4996881B2 (en) Pneumatic tire
JP4557652B2 (en) Pneumatic tire and manufacturing method thereof
JP2001322406A (en) Pneumatic tire
JP6186250B2 (en) Pneumatic tire
JP4054097B2 (en) Heavy duty pneumatic radial tire
JP3487805B2 (en) Pneumatic radial tire
JP4094168B2 (en) Pneumatic radial tire
JPH11291717A (en) Pneumatic tire
JPH061442Y2 (en) Pneumatic radial tires
JP4136537B2 (en) Pneumatic tire
JP3084231B2 (en) Pneumatic tire
JP4277982B2 (en) Pneumatic radial tire for icy and snowy roads

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20031209

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041214

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050118

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050125

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080204

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090204

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100204

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100204

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110204

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110204

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110204

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120204

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120204

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130204

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130204

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130204

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130204

Year of fee payment: 8

LAPS Cancellation because of no payment of annual fees