JPH11180109A - Pneumatic tire for heavy loads - Google Patents
Pneumatic tire for heavy loadsInfo
- Publication number
- JPH11180109A JPH11180109A JP9350768A JP35076897A JPH11180109A JP H11180109 A JPH11180109 A JP H11180109A JP 9350768 A JP9350768 A JP 9350768A JP 35076897 A JP35076897 A JP 35076897A JP H11180109 A JPH11180109 A JP H11180109A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- tire
- carcass
- curvature
- line
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は重荷重用空気入り
タイヤ、なかでも、トレッドショルダー域に延在する周
溝の、溝底へのクラックの発生を防止するカーカスライ
ン構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy duty pneumatic tire, and more particularly to a carcass line structure for preventing a circumferential groove extending in a tread shoulder region from cracking at a groove bottom.
【０００２】[0002]
【従来の技術】図３にタイヤ半部の子午線断面図で示す
ように、対をなすそれぞれのビードコア３１の周りに端
部分を折返したカーカス３２と、このカーカス３２のク
ラウン部の外周側に配設したベルト３３と、ベルト３３
のさらに外周側に配設したトレッド３４と、トレッド踏
面３４ａに形成されて周方向に連続し、タイヤ赤道面ｘ
−ｘに対して対称に位置する複数本の周溝３５，３６と
を具える従来の重荷重用空気入りタイヤでは、それを標
準リム３７にリム組みし、最高空気圧の５％の空気圧を
充填した状態の下にては、カーカス３２のクラウン部に
おけるカーカスライン、すなわち、カーカスの全プライ
の厚みの中央を通るラインの曲率半径Ｒ1，Ｒ2 ，Ｒ3
を、タイヤ赤道面ｘ−ｘから遠去かるにつれて小さくす
ることが一般的である。2. Description of the Related Art As shown in a meridian sectional view of a half of a tire in FIG. 3, a carcass 32 whose end portion is turned around a pair of bead cores 31 and an outer peripheral side of a crown portion of the carcass 32 are arranged. The belt 33 provided and the belt 33
And a tread 34 disposed on the outer peripheral side of the tire and a tread surface 34a formed on the tread tread surface 34a and continuous in the circumferential direction.
In a conventional heavy-duty pneumatic tire having a plurality of circumferential grooves 35 and 36 symmetrically positioned with respect to −x, the tire is assembled on a standard rim 37 and filled with 5% of the maximum air pressure. Under the condition, the radii of curvature R 1 , R 2 , R 3 of the carcass line in the crown portion of the carcass 32, that is, the line passing through the center of the thickness of all the plies of the carcass 32.
Is generally reduced as the distance from the tire equatorial plane xx increases.
【０００３】このようなタイヤは、そこへの所要の空気
圧の充填によって、図４に要部を拡大して示すように、
トレッド外径の、図に仮想線で示すような拡径を生じ
る。[0003] In such a tire, as shown in FIG.
The outer diameter of the tread is increased as shown by a virtual line in the figure.
【０００４】[0004]
【発明が解決しようとする課題】ところで、このような
空気入りタイヤでは、ベルト３３によるトレッド補強効
果が、タイヤ赤道面ｘ−ｘから離れるにつれて小さくな
ることから、タイヤに所要の空気圧を充填した場合は、
トレッド剛性がとくに低い周溝形成部分において、トレ
ッド踏面端に近い部分ほど拡径変形量が多くなり、これ
がため、トレッド幅方向の外側に位置する周溝３６、と
くには、トレッド踏面端から、トレッド踏面幅の１／４
以下の範囲内に存在するものの溝底３６ａの、溝拡幅方
向の引張り変形量が多くなり、この一方で、かかる周溝
３６およびその近傍部分では、タイヤの負荷転動時にお
ける、接地面内での押込み変形量もまた多くなるが故
に、相互に逆向きの大きな変形を繰返し受けるその溝底
３６ａに、比較的早期にクラックが発生するという問題
があった。By the way, in such a pneumatic tire, the effect of reinforcing the tread by the belt 33 decreases as the distance from the tire equatorial plane xx decreases, so that the tire is filled with a required air pressure. Is
In the circumferential groove forming portion where the tread rigidity is particularly low, the larger the portion closer to the end of the tread tread, the larger the amount of radial expansion deformation, and therefore, the circumferential groove 36 located outside in the tread width direction, particularly, the tread from the tread tread end 1/4 of tread width
Although present in the following range, the amount of tensile deformation in the groove widening direction of the groove bottom 36a is increased, while the circumferential groove 36 and the vicinity thereof are in the ground contact surface at the time of rolling load of the tire. Since the amount of indentation deformation also increases, there is a problem that cracks occur relatively early in the groove bottom 36a which undergoes repeated large deformations in opposite directions.
【０００５】この発明は、従来技術が抱えるこのような
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、それの目的とするところは、所要の空気
圧の充填に際する、周溝の溝底の引張り変形量を有効に
抑制することで、少なくとも、トレッド幅方向の外側に
位置する周溝への溝底クラックの発生を長期間にわたっ
て防止できる重荷重用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 studying to solve such problems of the prior art, and an object of the present invention is to provide a circuit for filling required air pressure. To provide a heavy-duty pneumatic tire capable of effectively preventing a groove bottom crack from occurring in a circumferential groove located at least on the outer side in the tread width direction for a long period of time by effectively suppressing the amount of tensile deformation of the groove bottom of the groove. is there.
【０００６】[0006]
【課題を解決するための手段】この発明の重荷重用空気
入りタイヤは、対をなすそれぞれのビードコアの周りに
端部分を折返したカーカスと、カーカスのクラウン部の
外周側に配設したベルトと、ベルトのさらに外周側に配
設したトレッドと、トレッド踏面に形成されて周方向に
連続する複数本の周溝とを具えるものであって、標準リ
ムにリム組みし、最高空気圧の５％の空気圧の充填姿勢
において、少なくとも、トレッド幅方向の最外側に位置
する周溝、なかでも、トレッド踏面端から、トレッド踏
面幅の１／４以下の範囲内に存在する周溝のタイヤ半径
方向内周側部分で、カーカスラインの曲率半径を他の部
分の曲率半径より小さくしたものである。A heavy-duty pneumatic tire according to the present invention comprises a carcass having an end portion turned around each pair of bead cores, a belt disposed on the outer peripheral side of a crown portion of the carcass, The tread is further provided on the outer peripheral side of the belt, and has a plurality of circumferential grooves formed on the tread tread surface and continuous in the circumferential direction. In the pneumatic filling attitude, at least the outer circumferential groove located in the outermost side in the tread width direction, in particular, the inner circumference in the tire radial direction of the circumferential groove existing within a range of 1/4 or less of the tread tread width from the tread tread end. In the side portion, the radius of curvature of the carcass line is smaller than the radius of curvature of the other portions.
【０００７】ここでより好ましくは、カーカスラインの
曲率半径の小さい部分の曲率中心を、周溝の溝底の、溝
幅方向の中点を通ってカーカスラインに立てた法線と、
そのカーカスラインとの交点を基点として、その法線の
側部で、トレッド踏面幅の１０％以内の範囲に位置させ
る。[0007] More preferably, a normal line in which the center of curvature of a portion having a small radius of curvature of the carcass line is erected on the carcass line through a midpoint in the groove width direction at the bottom of the peripheral groove,
With the intersection point with the carcass line as a base point, it is positioned within a range of 10% or less of the tread tread width on the side of the normal line.
【０００８】このような重荷重用空気入りタイヤでは、
タイヤに、ＪＡＴＭＡ ＹＥＡＲＢＯＯＫ（１９９７年
版）に規定される所要の空気圧を充填した場合、カーカ
スに大きな張力が作用して、カーカスラインの、相対的
に曲率半径の小さい部分の曲率半径が増加し、これによ
って、前記周溝の形成部分の拡径変形量が減少されるの
で、溝底の、溝拡幅方向の引張り変形量が少なくなっ
て、溝底クラックの発生が有利に防止されることにな
る。In such a heavy duty pneumatic tire,
When a tire is filled with a required air pressure specified in JATMA YEARBOOK (1997 version), a large tension acts on the carcass, and the radius of curvature of a portion of the carcass line having a relatively small radius of curvature increases. Accordingly, the amount of radial expansion deformation of the portion where the peripheral groove is formed is reduced, so that the amount of tensile deformation of the groove bottom in the groove widening direction is reduced, and the generation of a groove bottom crack is advantageously prevented.
【０００９】そしてこれらのことは、カーカスラインの
曲率半径の小さい部分の曲率中心を、周溝の溝底の中点
を通ってカーカスラインに立てた法線と、そのカーカス
ラインとの交点を基点として、その法線の側部で、トレ
ッド踏面幅の１０％以内に位置させた場合、より好まし
くはその法線上に位置させた場合にとくに顕著である。
いいかえれば、それが１０％を越えると、周溝の半径方
向成長を有効に抑制しづらくなる。[0009] These facts are based on the point of intersection of the normal line where the center of curvature of the portion of the carcass line having a small radius of curvature passes through the midpoint of the groove bottom of the peripheral groove and the carcass line and the carcass line. This is particularly noticeable when it is positioned within 10% of the tread width on the side of the normal, more preferably when it is positioned on the normal.
In other words, if it exceeds 10%, it becomes difficult to effectively suppress the radial growth of the circumferential groove.
【００１０】[0010]
【発明の実施の形態】以下にこの発明の実施の形態を図
面に示すところに基いて説明する。図１は、この発明の
実施の形態を示すタイヤ半部の子午線断面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a meridian sectional view of a tire half showing an embodiment of the present invention.
【００１１】図中１は対をなすそれぞれのビードコアを
示し、２は、それぞれのビードコア１の周りに端部分を
折り返した、少なくとも一枚のカーカスプライからなる
カーカス、たとえばラジアルカーカスを示す。また３
は、ビードコア１の外周側で、カーカス２の本体部分と
折返し部分との間に配設されて、半径方向外方に向けて
次第に薄肉となるスティフナを示す。In the figure, reference numeral 1 denotes a pair of bead cores, and reference numeral 2 denotes a carcass made of at least one carcass ply, for example, a radial carcass, having an end turned around each bead core 1. 3
Indicates a stiffener that is disposed on the outer peripheral side of the bead core 1 and between the main body portion and the folded portion of the carcass 2 and gradually becomes thinner radially outward.
【００１２】ここでは、カーカス２のクラウン部の外周
側に、少なくとも一層、図では四層のベルト層からなる
ベルト４を配設するとともに、このベルト４のさらに外
周側にトレッド５を配設し、さらに、トレッド踏面５ａ
に、周方向に直線状もしくはジグザグ状に連続して延び
る複形本の周溝６，７のそれぞれを、タイヤ赤道面ｘ−
ｘを隔てて対称に形成する。Here, a belt 4 composed of at least one belt layer, in the figure, four layers, is disposed on the outer peripheral side of the crown portion of the carcass 2, and a tread 5 is further disposed on the outer peripheral side of the belt 4. , And the tread tread 5a
Each of the circumferential grooves 6, 7 extending continuously linearly or zigzag in the circumferential direction is inserted into the tire equatorial plane x-
It is formed symmetrically across x.
【００１３】そしてさらには、タイヤを標準リム８にリ
ム組みし、最高空気圧の５％の空気圧の充填姿勢で、少
なくとも、トレッド幅方向の最外側に位置する周溝７、
図ではその周溝７のみに関し、それのタイヤ半径方向内
周側部分で、カーカスラインｃの曲率半径ｒ2 を、隣接
する他の部分の曲率半径ｒ1 ，ｒ3 より小さくする。Further, the tire is rim-assembled on a standard rim 8, and at least a circumferential groove 7, which is positioned at the outermost side in the tread width direction, in a charging posture of 5% of the maximum air pressure.
In the figure, only the circumferential groove 7 has a radius of curvature r 2 of the carcass line c at an inner peripheral side in the tire radial direction smaller than the radius of curvatures r 1 and r 3 of other adjacent portions.
【００１４】なお、ここにおいてより好ましくは、カー
カスラインｃの曲率半径の小さい部分の曲率中心を、前
記周溝７の溝底７ａの、溝幅方向の中点を通ってカーカ
スラインｃに立てた法線Ｎと、そのカーカスラインｃと
の交点Ｐを基点として、法線Ｎの側部で、トレッド踏面
幅の１０％以内の範囲に位置させ、さらに好ましくはそ
の法線に位置させる。In this case, more preferably, the center of curvature of the portion of the carcass line c having a small radius of curvature is set on the carcass line c through the middle point of the groove bottom 7a of the circumferential groove 7 in the groove width direction. With the intersection point P of the normal line N and the carcass line c as a base point, it is positioned on the side of the normal line N within a range of 10% or less of the tread tread width, and more preferably at the normal line.
【００１５】このように構成してなる空気入りタイヤで
は、そこへ、先に述べたような所要の空気圧を充填した
場合には、曲率半径の小さい部分の曲率半径ｒ1 が増加
することに基き、周溝７の形成部分の拡径変形量が有効
に低減されることになり、図２に仮想線で示すように、
その部分の変形量は、タイヤ赤道面寄りの周溝６の形成
部分のそれと実質的に相違しないものとなるので、周溝
７の溝底７ａの引張り変形量を十分に低減させて、その
溝底７ａへのクラックの発生を効果的に防止することが
できる。In the pneumatic tire configured as described above, when the required pneumatic pressure as described above is filled therein, the radius of curvature r 1 of the portion having a small radius of curvature increases. 2, the amount of radial expansion deformation of the portion where the circumferential groove 7 is formed is effectively reduced, and as shown by a virtual line in FIG.
Since the amount of deformation at that portion is not substantially different from that at the portion where the circumferential groove 6 is formed near the equatorial plane of the tire, the amount of tensile deformation of the groove bottom 7a of the circumferential groove 7 is sufficiently reduced, and The generation of cracks on the bottom 7a can be effectively prevented.
【００１６】[0016]
【実施例】供試タイヤを、ＴＢＲ １１／７０ Ｒ２
２．５ １４ＰＲ Ｒ１７０（４本溝リブパターン）と
し、適用リムを２２．５＊７．５０とするとともに、
８．０ｋｇｆ／ｃｍ2 の空気圧を充填して、２Ｄ４のウ
ィング車両への装着下で１０万ｋｍの実車走行後の、溝
底クラックの発生状況を調べたところ表１に示す通りと
なった。EXAMPLE A test tire was manufactured using TBR 11/70 R2.
2.5 14PR R170 (four-groove rib pattern), the applicable rim is 22.5 * 7.50,
After the air pressure of 8.0 kgf / cm 2 was charged and the vehicle was driven on a 2D4 wing vehicle and the vehicle traveled 100,000 km, the occurrence of cracks in the groove bottom was examined. The results are as shown in Table 1.
【００１７】なお表中の寸法諸元は、標準リムにリム組
みし、最高空気圧の５％の空気圧の充填時のものであ
る。The dimensions in the table are those obtained when the rim is assembled on a standard rim and the air pressure is 5% of the maximum air pressure.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【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、少なくとも、トレッド
幅方向の最外側に位置する周溝のタイヤ半径方向内周側
部分で、カーカスラインの曲率半径を他の部分のそれよ
り小さくすることで、その周溝の溝底へのクラックの発
生を有効に防止することができる。As is apparent from the above description, according to the present invention, the carcass line is formed at least in the tire radially inner peripheral side portion of the outermost circumferential groove located in the tread width direction. By making the radius of curvature smaller than that of the other portions, it is possible to effectively prevent the occurrence of cracks at the bottom of the circumferential groove.
【図１】この発明の実施形態を示すタイヤの子午線方向
断面図である。FIG. 1 is a meridional section view of a tire showing an embodiment of the present invention.
【図２】空気圧の充填状態を示す要部拡大断面図であ
る。FIG. 2 is an enlarged sectional view of a main part showing a state of filling with air pressure.
【図３】従来タイヤを示す図１と同様の断面図である。FIG. 3 is a sectional view similar to FIG. 1 showing a conventional tire.
【図４】空気圧の充填状態を示す図２と同様の断面図で
ある。FIG. 4 is a cross-sectional view similar to FIG. 2, showing a state of filling with air pressure.
１ ビードコア ２ カーカス ３ スティフナ ４ ベルト ５ トレッド ５ａ トレッド踏面 ６，７ 周溝 ７ａ 溝底 ８ 標準リム ｃ カーカスライン Ｎ 法線 Ｐ 交点 ｒ1 ，ｒ2 ，ｒ3 曲率半径 ｘ−ｘ タイヤ赤道面1 bead core 2 carcass 3 stiffeners 4 belt 5 a tread 5a tread 6,7 peripheral groove 7a groove bottom 8 standard rim c carcass line N normal P intersection r 1, r 2, r 3 radius of curvature x-x equatorial plane
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｂ６０Ｃ 9/18 Ｂ６０Ｃ 11/06 Ｂ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI // B60C 9/18 B60C 11/06 B
Claims (2)
端部分を折返したカーカスと、カーカスのクラウン部の
外周側に配設したベルトと、ベルトのさらに外周側に配
設したトレッドと、トレッド踏面に形成されて周方向に
連続する複数本の周溝とを具える重荷重用空気入りタイ
ヤであって、 標準リムにリム組みし、最高空気圧の５％の空気圧の充
填姿勢で、少なくとも、トレッド幅方向の最外側に位置
する周溝のタイヤ半径方向内周側部分で、カーカスライ
ンの曲率半径を他の部分の曲率半径より小さくしてなる
重荷重用空気入りタイヤ。1. A carcass having an end turned around each pair of bead cores, a belt disposed on an outer peripheral side of a crown portion of the carcass, a tread disposed further on an outer peripheral side of the belt, and a tread tread surface. A heavy-duty pneumatic tire having a plurality of circumferential grooves formed in the tire and having a circumferentially continuous circumferential groove. The tire is assembled with a standard rim, and is filled with a pneumatic pressure of 5% of the maximum air pressure at least in a tread width. A pneumatic tire for heavy load, wherein a radius of curvature of a carcass line is smaller than a radius of curvature of other portions at a radially inner circumferential portion of a circumferential groove positioned on the outermost side in the tire direction.
の曲率中心を、周溝の溝底の、溝幅方向の中点を通って
カーカスラインに立てた法線と、そのカーカスラインと
の交点を基点として、前記法線の側部で、トレッド踏面
幅の１０％以内の範囲に位置させてなる請求項１に記載
の重荷重用空気入りタイヤ。2. The intersection point of the normal of the carcass line with the center of curvature of the portion of the carcass line having a small radius of curvature passing through the midpoint in the groove width direction at the bottom of the circumferential groove and the carcass line. The heavy-duty pneumatic tire according to claim 1, wherein the base point is located within a range of 10% or less of a tread width on a side of the normal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35076897A JP3835647B2 (en) | 1997-12-19 | 1997-12-19 | Heavy duty pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35076897A JP3835647B2 (en) | 1997-12-19 | 1997-12-19 | Heavy duty pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11180109A true JPH11180109A (en) | 1999-07-06 |
| JP3835647B2 JP3835647B2 (en) | 2006-10-18 |
Family
ID=18412742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35076897A Expired - Fee Related JP3835647B2 (en) | 1997-12-19 | 1997-12-19 | Heavy duty pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3835647B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151119A (en) * | 2004-11-26 | 2006-06-15 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for heavy load |
| JP2008105656A (en) * | 2006-09-25 | 2008-05-08 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| WO2008093537A1 (en) | 2007-01-30 | 2008-08-07 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| CN107074025A (en) * | 2014-10-29 | 2017-08-18 | 米其林集团总公司 | The optimal main body casing ply shape of tire |
| WO2018012056A1 (en) * | 2016-07-15 | 2018-01-18 | 横浜ゴム株式会社 | Pneumatic tire |
-
1997
- 1997-12-19 JP JP35076897A patent/JP3835647B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151119A (en) * | 2004-11-26 | 2006-06-15 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for heavy load |
| JP4639776B2 (en) * | 2004-11-26 | 2011-02-23 | 横浜ゴム株式会社 | Heavy duty pneumatic radial tire |
| JP2008105656A (en) * | 2006-09-25 | 2008-05-08 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| WO2008093537A1 (en) | 2007-01-30 | 2008-08-07 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| US8146633B2 (en) | 2007-01-30 | 2012-04-03 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| CN107074025A (en) * | 2014-10-29 | 2017-08-18 | 米其林集团总公司 | The optimal main body casing ply shape of tire |
| WO2018012056A1 (en) * | 2016-07-15 | 2018-01-18 | 横浜ゴム株式会社 | Pneumatic tire |
| CN109476183A (en) * | 2016-07-15 | 2019-03-15 | 横滨橡胶株式会社 | Pneumatic tire |
| DE112017003571T5 (en) | 2016-07-15 | 2019-05-09 | The Yokohama Rubber Co., Ltd. | tire |
| US20190359000A1 (en) * | 2016-07-15 | 2019-11-28 | The Yokohama Rubber Co., Ltd. | Pneumatic Tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3835647B2 (en) | 2006-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6237661B1 (en) | Run-flat tire with specified profile | |
| EP1437236B1 (en) | Pneumatic tire | |
| US7077182B2 (en) | Run-flat tire | |
| US6575214B1 (en) | Vehicle tire including tread portion defined by cycloid curve or epicycloid curve | |
| US20050006018A1 (en) | Pneumatic tire | |
| KR0169339B1 (en) | Pneumatic tire | |
| CA1126635A (en) | Pneumatic safety tire | |
| JP2983606B2 (en) | Pneumatic tire | |
| JP2837840B2 (en) | Pneumatic tire | |
| JPH0237003A (en) | Heavy load tubeless tyre | |
| JP2020001617A (en) | Pneumatic tire | |
| US6491077B1 (en) | Tire with specified crown reinforcement and carcass profile | |
| JP2000225810A (en) | Pneumatic radial tire for heavy load | |
| JP2005145446A (en) | Pneumatic tire | |
| JPH1170802A (en) | Pneumatic radial tire | |
| JPH082210A (en) | Pneumatic radial tire for heavy load | |
| JPH0648109A (en) | Pneumatic radial tire for heavy load | |
| JPH11180109A (en) | Pneumatic tire for heavy loads | |
| JP4450449B2 (en) | Pneumatic radial tire | |
| JP4255254B2 (en) | Run flat tire | |
| JP2002205514A (en) | Pneumatic tire for heavy load | |
| JPH1035219A (en) | Radial tire used for heavy load | |
| JP2003211914A (en) | Tire for heavy load | |
| JP3075487B2 (en) | Radial tires for construction vehicles | |
| JP2768425B2 (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041104 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060529 |
|
| 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: 20060627 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20060712 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060720 |
|
| 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: 20090804 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100804 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110804 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110804 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120804 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120804 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130804 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |