公开(公告)号：US20100224300A1

公开(公告)日：2010-09-09

申请号：US12714132

申请日：2010-02-26

Applicant: Kiyoto MARUOKA

Inventor： Kiyoto MARUOKA

IPC: B60C15/06

CPC classification number: B60C15/06 ,  B60C15/04 ,  B60C15/0607 ,  B60C2015/009 ,  B60C2015/0617 ,  B60C2015/0625 ,  B60C2200/06 ,  Y10T152/10819 ,  Y10T152/10837

Abstract: A heavy-load radial tire includes a bead apex rubber 8 composed of a high-elastic lower apex portion 11 and a low-elastic upper apex portion 12. The lower apex portion 11 has an L-shaped cross section composed of a bottom piece portion 11a disposed along the radially outer surface of a bead core 5 and a standing piece portion 11b standing from the axially inner end of the bottom piece portion 11a and radially outwardly extending along a ply main portion 6a of a carcass 6. At an outer end position P1 of a ply turnup portion 6b, the upper apex portion 12 has a thickness T1s of 0.50 to 0.75 times a core width Bw of the bead core 5. At an outer end position P2 of an outer wound-up portion 9o of a bead reinforcing cord layer 9, the upper apex portion 12 has a thickness T2s of 0.57 to 0.90 times the core width Bw. The core width Bw is 0.68 to 0.80 times a bead bottom width BL. A distance W1 oriented in parallel to an outer surface 5S of the bead core 5 and ranging from a bead heal point Ph to an axially innermost end 5e of the bead core 5 is 0.92 to 1.08 times the bead bottom width BL.

Abstract translation: 重载子午线轮胎包括由高弹性下顶点11和低弹性上顶部12组成的胎圈三角胶橡胶8.下顶点11具有由底部部分构成的L形横截面 11a沿着胎圈芯5的径向外表面设置，以及从底片部分11a的轴向内端竖立并沿着胎体6的帘布层主体部分6a沿径向向外延伸的立管片11b。 P1上部顶部部分12的厚度T1s为胎圈芯5的芯宽度Bw的0.50至0.75倍。在胎圈加强件的外部卷绕部分9o的外端位置P2处 帘线层9中，顶部顶部12的厚度T2s为纤芯宽度Bw的0.57至0.90倍。 芯部宽度Bw为珠子底部宽度BL的0.68〜0.80倍。 从胎圈芯5的外表面5S平行定向并且从胎圈愈合点Ph到胎圈芯5的轴向最内端5e的距离W1为胎圈边宽度BL的0.92〜1.08倍。

公开(公告)号：US20100269967A1

公开(公告)日：2010-10-28

申请号：US12652088

申请日：2010-01-05

Applicant: Kiyoto MARUOKA

Inventor： Kiyoto MARUOKA

IPC: B60C11/01

CPC classification number: B60C11/01 ,  B60C9/2006 ,  B60C9/28 ,  B60C11/0306 ,  B60C11/0332 ,  B60C11/04 ,  B60C2200/06

Abstract: A heavy duty radial tire comprises a tread portion divided into four or five circumferential ribs and a tread reinforcing belt including a maximum width belt ply. The width Bw of the maximum width belt ply is 0.90 to 0.98 times the tread width Tw. The contour shape of the tire footprint has a ground contacting length CB at a 70% width position and a ground contacting length CC at a 97% width position, wherein the ratio CB/CC is 1.00 to 1.06. In a tread edge near region J, (1) the axially outermost shoulder rib is provided with no circumferential groove having a width of less than 5 mm, and a ratio Rs/Rc of an axial width Rs of the shoulder rib to an axial width Rc of a center rib is 1.25 to 1.45, or (2) the shoulder rib is provided with a narrow circumferential groove having a width of less than 5 mm to divide the shoulder rib into an axially inner main portion and an axially outer narrow portion, and a ratio Rs1/Rc of an axial width Rs1 of the axially inner main portion to an axial width Rc of a center rib is 1.25 to 1.45.

Abstract translation: 重型子午线轮胎包括分为四个或五个圆周肋的胎面部分和包括最大宽度带束层的胎面加强带。 最大宽度皮带层的宽度Bw为胎面宽度Tw的0.90〜0.98倍。 轮胎覆盖区的轮廓形状具有在70％宽度位置处的接地接触长度CB和97％宽度位置处的接地接触长度CC，其中CB / CC的比率为1.00至1.06。 在区域J附近的胎面边缘，（1）轴向最外侧的胎肩肋没有设置有宽度小于5mm的周向沟槽，肩肋的轴向宽度Rs与轴向宽度的比值Rs / Rc 中心肋的Rc为1.25至1.45，或（2）肩肋设置有宽度小于5mm的窄周向沟槽，以将胎肩肋分成轴向内主体部分和轴向外窄部分， 并且轴向内部主体部分的轴向宽度Rs1与中心肋骨的轴向宽度Rc的比值Rs1 / Rc为1.25至1.45。

公开(公告)号：US20110162775A1

公开(公告)日：2011-07-07

申请号：US13047204

申请日：2011-03-14

Applicant: Kiyoto MARUOKA

Inventor： Kiyoto MARUOKA

IPC: B60C15/04

CPC classification number: B60C15/0027 ,  B60C15/06 ,  B60C15/0607 ,  B60C2015/009 ,  B60C2015/0614 ,  B60C2200/06 ,  Y10T152/10819 ,  Y10T152/10828

Abstract: A heavy-load tire has a wind bead structure in which a turned-up portion of a carcass ply is wound around a bead core, in which a bead portion is equipped with a bead reinforcing layer having a u-shaped cross section and a bead apex rubber having a triangular-shaped cross section. The turned-up portion has an auxiliary turned-up portion passing through the vicinity of a radially outer side of the bead core. The bead apex rubber includes a high elasticity inner apex portion disposed at a radially inner side and a low elasticity outer apex portion disposed at a radially outer side. The inner apex portion has an L-shaped cross section including a bottom piece portion along the radially outer side of the auxiliary turned-up portion, and a raised piece portion which rises at an axially inner end side of the bottom piece portion and extends radially outwardly in a tapering manner along the body portion of the carcass ply.

Abstract translation: 重负载轮胎具有风胎结构，其中胎体帘布层的折叠部分缠绕在胎圈芯上，胎圈部分配备有具有u形横截面的胎圈加强层和胎圈 三角形橡胶具有三角形横截面。 折回部分具有穿过胎圈芯的径向外侧附近的辅助翻边部分。 胎圈三棱胶包括设置在径向内侧的高弹性内顶点部分和设置在径向外侧的低弹性外顶部部分。 内顶部具有L形截面，其包括沿着辅助翻边部分的径向外侧的底部部分和在底部部分的轴向内端侧上升并且径向延伸的凸起部分 向外沿着胎体帘布层的主体部分以锥形方式向外延伸。

公开(公告)号：US20100084069A1

公开(公告)日：2010-04-08

申请号：US12510483

申请日：2009-07-28

Applicant: Kiyoto MARUOKA

Inventor： Kiyoto MARUOKA

IPC: B60C9/00

CPC classification number: B60C9/2006 ,  B60C2009/1842 ,  B60C2009/1878

Abstract: A heavy duty tire comprises a belt disposed radially outside a carcass in the tread portion, and a belt cushion rubber layer inserted between the carcass and each axial edge portion of the belt. The complex elastic modulus of the belt cushion rubber layer is in a range of from 3.5 to 4.5 MPa. The belt is made up of three plies each made of parallel steel cords inclined at an angle of from 15 to 23 degrees with respect to the tire equator. With respect to the tire equator, the inclination of the belt cords of the radially innermost first ply is opposite to that of the middle second belt ply. The second belt ply is narrower than the first belt ply and wider than the radially outermost third belt ply. The ply strengths S1, S2 and S3 of the first, second and third belt plies, respectively, satisfy: (1) S1>S2, (2) S1>S3, (3) 55≦S1≦75, and (4) 1.25≦S1/S2≦1.65.

Abstract translation: 重载轮胎包括设置在胎面部分中的胎体径向外侧的带，以及插入在胎体和带的每个轴向边缘部分之间的带缓冲橡胶层。 带缓冲橡胶层的复合弹性模量在3.5〜4.5MPa的范围内。 皮带由三层制成，每层由相对于轮胎赤道以15至23度的角度倾斜的平行钢帘线制成。 对于轮胎赤道，径向最内的第一层的带束帘线的倾斜与中间的第二带束层的倾斜相反。 第二带束层比第一带束层窄，并且比径向最外侧的第三带束层宽。 第一，第二和第三皮带层的帘布层强度S1，S2和S3分别满足：（1）S1> S2，（2）S1> S3，（3）55＆nlE; S1＆nlE; 75和（4）1.25 ＆nlE; S1 / S2＆nlE; 1.65。

公开(公告)号：US20120060995A1

公开(公告)日：2012-03-15

申请号：US13113116

申请日：2011-05-23

Applicant: Kiyoto MARUOKA

Inventor： Kiyoto MARUOKA

IPC: B60C9/28

CPC classification number: B60C9/28 ,  B60C11/02 ,  B60C2200/06 ,  Y10T152/10765 ,  Y10T152/10792 ,  Y10T152/10801

Abstract: A heavy duty tire comprises a belt disposed radially outside a carcass. The belt consists of a innermost first ply, a second ply and a outermost third belt ply. With respect to the tire equator, the cords of the first ply are laid at an angle θ1 of 15 to 25 degrees; the cords of the second ply are laid at an angle θ2 of 15 to 25 degrees; the cords of the third ply are laid at an angle θ3 of 45 to 60 degrees; the cords of the second ply are inclined oppositely to the cords of the first ply; the cords of the third ply are inclined to the same direction as the cords of the second ply; |θ2−θ1| is not more than 5 degrees; |θ3−θ2| is 30 to 45 degrees; the axial widths W1, W2 and W3 of the first, second and third belt plies, respectively, satisfy W1>W2>W3; strengths S1, S2 and S3 of the first, second and third belt plies, respectively, satisfy S1>S2>S3 and 1.0>S2/S1>=0.6.

Abstract translation: 重型轮胎包括沿胎体径向设置的皮带。 皮带由最内层的第一层，第二层和最外层的第三层层组成。 对于轮胎赤道，第一层的帘线以一定的角度放置; 1至15度; 第二层的帘线铺设成角度和角度; 2至15度至25度; 第三层的帘线铺设在角度和角度; 3为45至60度; 第二层的帘线与第一帘布层的帘线相反倾斜; 第三层的帘线倾斜于与第二层帘线相同的方向; |＆thetas; 2-＆thetas; 1 | 不超过5度; |＆thetas; 3-＆thetas; 2 | 是30到45度; 第一，第二和第三带束层的轴向宽度W1，W2和W3分别满足W1> W2> W3; 第一，第二和第三带束层的强度S1，S2和S3分别满足S1> S2> S3和1.0> S2 / S1> = 0.6。