公开(公告)号：CA1314000C

公开(公告)日：1993-03-02

申请号：CA564744

申请日：1988-04-21

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  SHIMADA NORIHIRO

IPC: B60C11/04 ,  B60C11/12 ,  B60C11/06

Abstract: HEAVY DUTY PNEUMATIC RADIAL TIRES A heavy duty pneumatic radial tire comprises a tread divided into plural ribs by plural main grooves each extending zigzag circumferentially of the tire. The resistance to uneven wear is improved by regulating the pitch of the open sipe crossing the tread as well as the amplitude and pitch of the main groove in connection with the sipe pitch.

公开(公告)号：CA1319600C

公开(公告)日：1993-06-29

申请号：CA569783

申请日：1988-06-17

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  SHIMADA NORIHIRO

IPC: B60C9/08 ,  B60C11/00 ,  B60C11/01

Abstract: HIGH INTERNAL PRESSURE TYPE HEAVY DUTY PNEUMATIC RADIAL TIRES High internal pressure type heavy duty pneumatic radial tires are disclosed, which each comprise a tread. Each tire is formed and vulcanized in a mold, and the tread has an outer contour inside the mold, which outer contour sectionally consists of a curve halving a positive radius of curvature with a curvature center on a side of a tire axis at a central portion of the tread extending between points "m" being oppositely separated from a tread (TW/2) center by 0.64 to 0.85 of a half of a width of the tread and a curve having a negative radius of curvature with a curvature center on a side opposite to the tire axis at tread shoulder portions axially outside said points "m". The negative radius of curvature has an absolute value of 1 to 30 of the tread width (TW). A tread shoulder edge drop-correcting value H3 is in a range from 0.05 to 0.04 of H1 which is a radially dropped amount of an edge of the tread which would be formed in a mold sectionally having a single radius of curvature and the entire outer contour of the tread radially outwardly expands from that inside the . mold by applying a use internal pressure to the tire to form the outer contour of the tread at a single radius of curvature.

公开(公告)号：JPH09150607A

公开(公告)日：1997-06-10

申请号：JP31267495

申请日：1995-11-30

Applicant: BRIDGESTONE CORP

Inventor： SHIMADA NORIHIRO

IPC: B60C9/18 ,  B60C11/00 ,  B60C11/01 ,  B60C11/04 ,  B60C11/12

Abstract: PROBLEM TO BE SOLVED: To effectively prevent a pneumatic tire for heavy load from developing cracks at the bottom of the small grooves thereof. SOLUTION: A belt 3, tread rubber and a plurality of main grooves extending in a circumferential direction are disposed. A small groove 10 which opens at the side surface and extends substantially in the circumferential direction is disposed outside the belt 3 in the axial direction and also opens at the position separated in the range of 20 to 150% of the depth of the main groove toward the inside in the radial direction from the effective roadholding end of the tread along the contour of the above described side surface in the groove width of 5 to 75% of the width of the main groove and is shaped like a letter V in the cross section. The bottom of the small groove is at the position of 0.5 to 10% of roadholding width of the tread inside in the axial direction from the above described roadholding end and at the position of 20 to 180% of the depth of the main groove inside in the radial direction from the above described roadholding end. The tread rubber comprises two upper and lower laminated rubber layers 8, 9 which are different in elasticity and has the rubber layer at the bottom of the small groove 10 which is positioned at the tread surface side and of 1.0mm or more in thickness.

公开(公告)号：JPH08175130A

公开(公告)日：1996-07-09

申请号：JP33789594

申请日：1994-12-27

Applicant: BRIDGESTONE CORP

Inventor： SHIMADA NORIHIRO

IPC: B60C15/06

Abstract: PURPOSE: To suppress the separation in the vicinity of an outer end in the radial direction of a fold-back part while preventing the heat generation at the bead part and the increase in the rolling resistance. CONSTITUTION: The distortion generated in a side wall part 24 by the loaded rolling is absorbed during the transmission by the deformation of a soft (

公开(公告)号：JPS63149205A

公开(公告)日：1988-06-22

申请号：JP29541186

申请日：1986-12-10

Applicant: BRIDGESTONE CORP

Inventor： TANAKA MAKOTO ,  MIYAMOTO KENJI ,  SHIMADA NORIHIRO

IPC: B60C11/12

Abstract: PURPOSE:To reduce a ply stair and improve uneven wear resisting performance by forming a plurality of cut-outs on the surface of a tread and setting the direction of cutting these cut-outs and the cut-out angle to meet specified requirements for the equator surface of tire. CONSTITUTION:A tire 21 is provided with a tread 22 extending circumferentially and a belt 25 having a plurality of belt layers 25a-25d consisting of steel cords 24. And the tread 22 is formed on the surface with a plurality of main grooves 27 extending circumferentially and ribs 28 defined by the main grooves 27. In the above construction, the rib 28 is formed with a plurality of siper (cut-outs) 30. And the direction of cut-out 30 crosses slantly the direction of steel cord 24a in the outer-most belt layer 25a nearest to the tread 22 on the equator surface E of tire. Also, the cut-out angle theta30 of the direction of cutting out the siper 30 made to the equator surface E of tire is set to 5-85 degrees.

公开(公告)号：JP2010036832A

公开(公告)日：2010-02-18

申请号：JP2008205054

申请日：2008-08-08

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： SHIMADA NORIHIRO

IPC: B60C9/18 ,  B60C9/20

Abstract: PROBLEM TO BE SOLVED: To provide a tire can further more suppress abrasion of a guide wheel tire and a guide wheel road surface while enhancing abrasion life. SOLUTION: The tire 1 includes a carcass 4 troidally straddling between a pair of bead parts 2; an inclination belt layer 5 comprising a plurality of cords extending along a direction inclined relative to a tire circumferential direction and arranged at an outer side in a tire radial direction of the carcass 4; and a waved belt layer 6 of at least two layers comprising a plurality of cords extending while meandering along a tire circumferential direction and arranged at an outer side in the tire radial direction of the inclination belt layer 4. Width BW of the inclination belt layer 4 is larger than tread width TW. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供轮胎，可以进一步抑制引导轮轮胎和引导轮路面的磨损，同时增加磨损寿命。 解决方案：轮胎1包括跨越一对胎圈部分2之间的胎体4; 倾斜带层5，其包括沿着相对于轮胎周向倾斜的方向延伸并且布置在胎体4的轮胎径向外侧的多根帘线; 以及包括沿着轮胎周向蜿蜒延伸并且布置在倾斜带束层4的轮胎径向外侧的多根帘线的至少两层的波浪形带束层6.倾斜带束层4的宽度BW 大于胎面宽度TW。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009096398A

公开(公告)日：2009-05-07

申请号：JP2007271535

申请日：2007-10-18

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： SHIMADA NORIHIRO

IPC: B60C11/12 ,  B60C11/03 ,  B60C11/04

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire that a risk of lacking a ground section is effectively removed by preventing sipe tires that are generated in proximity from being connected with each other. SOLUTION: A wheel tread 1 is provided with four peripheral channels 2, 3 that are continuously extended in the tread peripheral direction and sipes 8a, 8b are formed at each of the gaps between the peripheral channels and ground sections 4, 5, 6 that are blocked out between a peripheral channel 3 and a tread side edge E. A center rib is marked off at a tread center section and a phase difference is applied to a positioning pitch P in the tread peripheral direction of the sipes 8a, 8b extended across several ground sections 5, 6 with the tread center O as a border. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种充气轮胎，其通过防止彼此连接而产生的刀槽花纹轮胎有效地去除了缺少接地部分的风险。 解决方案：轮胎胎面1设置有在胎面周向方向上连续延伸的四个周向通道2,3，并且在周边通道和接地部分4,5之间的每个间隙处形成有刀槽花纹8a，8b， 在周边通道3和胎面侧边缘E之间被阻挡。在胎面中心部分标记中心肋，并且在刀槽花纹8a，8b的胎面周向方向上的定位间距P施加相位差 延伸穿过几个接地部分5,6，其中胎面中心O作为边界。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2005212140A

公开(公告)日：2005-08-11

申请号：JP2004018395

申请日：2004-01-27

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： SHIMADA NORIHIRO

IPC: B29D30/52

Abstract: PROBLEM TO BE SOLVED: To provide a bias tire manufacturing method for molding a green tire using a molding drum having a small outer diameter at the time of production of a tire with a rim outer diameter ratio of 2.1 or above, capable of ensuring the durability of a tread joint part even if the diameter expansion ratio of the green tire is a predetermined magnitude or above and not causing joint falling failure.
SOLUTION: The green tire is molded by winding a tread rubber with a tread rubber cutting angle of 25° or below around a tire molding drum of which the expansion ratio is set to 54% or above.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种轮胎制造方法，该方法用于在生产具有2.1或更高的轮辋外径比的轮胎时使用具有小外径的成型滚筒来模制生胎，能够 即使生胎的直径膨胀比为预定值以上且不引起关节脱落，也能够确保胎面接合部的耐久性。 解决方案：通过将轮胎成型滚筒的膨胀比设定为54％以上，将胎面橡胶的胎面橡胶切割角度为25°以下的胎面橡胶卷绕成型。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004058791A

公开(公告)日：2004-02-26

申请号：JP2002218323

申请日：2002-07-26

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： SHIMADA NORIHIRO

IPC: B60C15/00

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire excellent in a rim fitting property by making a shape of a bead part appropriate even in the case of a light weighted rim such as a PCI rim.
SOLUTION: The pneumatic tire has a bead part 1 buried with a bead core 2. When a bead base 5 of the bead part 1 is divided into two parts of a bead heel side area 6a and a bead toe side area 6b, at least three main projections 9a, 9b, 9c having tip ends 8a, 8b, 8c tapered from the bead base 5 toward an inner side 7 in the radial direction of the tire are provided at a predetermined interval. The main projections 9a, 9b, 9c are constituted such that the tip ends 8a, 8b, 8c fall down toward the inside 10 in the width direction of the tire in assembling of the rim.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003205705A

公开(公告)日：2003-07-22

申请号：JP2002004097

申请日：2002-01-11

Applicant: BRIDGESTONE CORP

Inventor： SHIMADA NORIHIRO

IPC: B60C11/01 ,  B60C11/04 ,  B60C11/13

Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire in which the sand traveling performance is improved. SOLUTION: A tread 22 is demarcated by six circumferential grooves 32 substantially extending along the circumferential direction of the tread, and an outer surface of the tread 22 is divided into seven ribs 34 and 36. The circumferential grooves 32 are formed in a shape which is wider on the distal side than an open end. Ribs located on both outermost ends in the axial direction of the tread 22 in the seven ribs 34 and 36 are shoulder ribs 36. A plurality of grip groups 38 extending toward the tire center are circumferentially disposed on the shoulder ribs 36 at equal intervals. COPYRIGHT: (C)2003,JPO