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公开(公告)号：US20150298506A1
公开(公告)日：2015-10-22
申请号：US14648304
申请日：2013-11-28
Applicant: BRIDGESTONE CORPORATION
Inventor： Shinsaku KATAYAMA , Eisuke SETA , Yoshio KAJI , Masafumi KOIDE , Takayuki KURATA , Hiroyuki KATSUNO , Masakazu AMANO , Ataka TAKEI
CPC classification number: B60C11/0311 , B60C5/00 , B60C11/0302 , B60C11/0306 , B60C11/033 , B60C11/0332 , B60C11/1236 , B60C11/1263 , B60C11/1369 , B60C2011/0313 , B60C2011/0341 , B60C2011/0344 , B60C2011/0369 , B60C2011/0374 , B60C2011/1209
Abstract: A pneumatic tire (10), which has, in the surface of the tread (11), lug grooves (15) on one side extending from one axial edge towards the axial center of the tire in such a manner as to intersect with the circumferential direction of the tire and lug grooves (15) on the other side extending in a symmetrically opposite direction from the axial center towards the other axial edge of the tire, has at least one circumferential groove (12) extending circumferentially around the tire. Also, circumferential grooves (12, 13a, 13b) are so formed as to satisfy a relationship of “1≦(S/L)≦3” where L is the axial length of the central region, which is the region enclosed by two straight parallel lines each passing through the center between the contact width center (CL) and the contact edge with the shoulder regions being the regions axially outside of the parallel lines, and S is the total of the groove areas of the circumferential grooves (12, 13a, 13b) disposed in the central region. Therefore, the pneumatic tire (10) not only secures the steering stability performance on wet road surfaces, but also improves the steering stability and wear resistance performance on dry road surfaces.
Abstract translation: 一种充气轮胎（10），其在所述胎面（11）的表面具有从一个轴向边缘朝向所述轮胎的轴向中心延伸的一侧的横向槽（15），以与所述周向 在轮胎的轴向中心朝向轮胎的另一个轴向边缘的对称相反方向延伸的另一侧的轮胎和横向花纹槽（15）的方向具有沿轮胎周向延伸的至少一个周向槽（12）。 此外，周向槽（12,13a，13b）形成为满足“1＆nlE;（S / L）＆nlE; 3”的关系，其中L是中心区域的轴向长度，其是由两个 每个穿过接触宽度中心（CL）和与胎肩区域的接触边缘之间的中心的平行线是位于平行线的轴向外侧的区域，S是周向槽（12， 13a，13b）。 因此，充气轮胎（10）不仅可以确保湿路面的操纵稳定性，而且可以提高干路面上的操纵稳定性和耐磨性能。
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公开(公告)号：US20190100058A1
公开(公告)日：2019-04-04
申请号：US16088987
申请日：2016-11-25
Applicant: BRIDGESTONE CORPORATION
Inventor： Yoshio KAJI
Abstract: A tire mold includes a mold surface for vulcanizing and molding a tire, and a blade for vulcanizing and molding a sipe formed in the mold surface. The blade includes a concave-convex surface in which a plurality of convex portions formed adjacent to each other and a plurality of concave portions formed between the adjacent convex portions adjacent to each other are formed. A length of the concave portion is smaller than a length of the convex portion in a concave-convex surface view. The concave portion is sharp in a depth direction of the concave portion.
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公开(公告)号：US20240383284A1
公开(公告)日：2024-11-21
申请号：US18693154
申请日：2022-05-19
Applicant: BRIDGESTONE CORPORATION
Inventor： Hiroyuki MATSUMOTO , Yoshio KAJI , Hiroshi NOMURA
IPC: B60C11/12
Abstract: The tire of this disclosure is a tire having a land portion on a tread surface, wherein the land portion comprises a sipe unit consisting of a pair of sipes, each of the pair of sipes extends such that both ends in the extending direction of sipes terminate within the land portion, and the pair of sipes are opposed to each other in the tire circumferential direction only in part in the tire width direction.
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公开(公告)号：US20240399797A1
公开(公告)日：2024-12-05
申请号：US18693153
申请日：2022-05-06
Applicant: BRIDGESTONE CORPORATION
Inventor： Hiroyuki MATSUMOTO , Yoshio KAJI , Hiroshi NOMURA
Abstract: The tire 10 of this disclosure is characterized in that at least one of the land portions comprises at least one sipe unit 60, both ends of each of one sipe 6a and the other sipe 6b constituting a pair of sipes terminates in the land portion, the one sipe 6a and the other sipe 6b are arranged opposing each other in the tire circumferential direction and have long sides extending in the tire width direction, respectively, the one sipe 6a has a short side 62a extending from either end e1 of the long side 61a in the tire width direction to approach the other sipe 6b side, and the other sipe 6b has a short side 62b extending from the other end e2 of the long side 61b in the tire width direction to approach the one sipe 6a side.
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公开(公告)号：US20220242171A1
公开(公告)日：2022-08-04
申请号：US17726622
申请日：2022-04-22
Applicant: BRIDGESTONE CORPORATION
Inventor： Yoshio KAJI , Ryunosuke MATSUYAMA , Shinsaku KATAYAMA
Abstract: The projection portion includes a straight portion extended linearly in a predetermined direction, a first inclined portion inclined to spread toward an outer side in the predetermined direction from one end of the straight portion, and a second inclined portion inclined to spread toward an outer side in the predetermined direction from another end of the straight portion. A period defined by a length of the projection portion in the predetermined direction is 0.8 times to 2.0 times as large as a sipe depth defined by a length of the sipe between the wheel tread of a block and a bottom of the sipe.
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Patent Agency Ranking
公开(公告)号：US20190100059A1
公开(公告)日：2019-04-04
申请号：US16094529
申请日：2017-03-16
Applicant: BRIDGESTONE CORPORATION
Inventor： Yoshio KAJI , Ryunosuke MATSUYAMA , Shinsaku KATAYAMA
Abstract: The projection portion 150 includes a straight portion 152 extended linearly in a predetermined direction, a first inclined portion 151 inclined to spread toward an outer side in the predetermined direction from one end of the straight portion 152, and a second inclined portion 153 inclined to spread toward an outer side in the predetermined direction from another end of the straight portion 152. A period defined by a length of the projection portion 150 in the predetermined direction is 0.8 times to 2.0 times as large as a sipe depth defined by a length of the sipe 100A between the wheel tread of a block 20A and a bottom of the sipe 100A.
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公开(公告)号：US20150321518A1
公开(公告)日：2015-11-12
申请号：US14648563
申请日：2013-11-28
Applicant: BRIDGESTONE CORPORATION
Inventor： Shinsaku KATAYAMA , Eisuke SETA , Yoshio KAJI , Masafumi KOIDE , Takayuki KURATA , Hiroyuki KATSUNO , Masakazu AMANO , Ataka TAKEI
CPC classification number: B60C11/04 , B60C11/0302 , B60C11/0309 , B60C11/0332 , B60C11/11 , B60C11/12 , B60C11/1236 , B60C11/13 , B60C11/1369 , B60C2011/0341 , B60C2011/0344 , B60C2011/0346 , B60C2011/0365 , B60C2011/0369 , B60C2011/0393 , B60C2011/1213 , B60C2011/1268
Abstract: A pneumatic tire (10) has, in the surface of the tread (11), a central circumferential groove (12) located at the center of the contact patch width and extending circumferentially around the tire, a plurality of longitudinal grooves (13 (13a, 13b)) formed on the axially outside of the central circumferential groove (12), lug grooves (15), and blocks (16 (16a to 16c)) defined by the central circumferential groove (12), the longitudinal grooves (13), and the lug grooves (15). Each of the lug grooves (15) is formed such that its width in the shoulder region is greater than its width in the central region, and the sum of the groove area of the central circumferential groove (12) and the groove area of the longitudinal grooves (13) is smaller than the area of the lug grooves (15). As a result, the pneumatic tire (10) not only secures the wet braking performance and wear resistance performance on paved roads, but also improves the acceleration performance and braking performance and the steering stability performance on snowy roads.
Abstract translation: 一种充气轮胎（10）在胎面（11）的表面具有位于接触片宽度的中心并沿轮胎周向延伸的中心圆周槽（12），多个纵向槽（13（13a） ，13b）），形成在中心周向槽（12）的轴向外侧，横向槽（15）和由中心周向槽（12）限定的块（16（16a至16c）），纵向槽（13） ，和横向花纹槽（15）。 每个横向花纹沟（15）形成为使得其肩部区域中的宽度大于其在中心区域中的宽度，并且中央圆周凹槽（12）的沟槽面积与纵向 槽（13）小于横向花纹沟（15）的面积。 因此，充气轮胎（10）不仅可以确保铺路的湿式制动性能和耐磨性，而且可以提高雪道上的加速性能，制动性能和操纵稳定性。
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公开(公告)号：US20240383283A1
公开(公告)日：2024-11-21
申请号：US18693947
申请日：2022-05-12
Applicant: BRIDGESTONE CORPORATION
Inventor： Hiroyuki MATSUMOTO , Yoshio KAJI , Hiroshi NOMURA
IPC: B60C11/12
Abstract: Provided is a pneumatic tire in which sipe units with minute sipes are repeatedly arranged in a land portion; at least one end in an extending direction of the minute sipe of at least one of the minute sipes terminates within the land portion; w1(w2)×h is 150 (mm2) or less, and a sipe density is 0.15 (1/mm) or more.
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公开(公告)号：US20240375450A1
公开(公告)日：2024-11-14
申请号：US18692827
申请日：2022-05-06
Applicant: BRIDGESTONE CORPORATION
Inventor： Hiroyuki MATSUMOTO , Yoshio KAJI , Hiroshi NOMURA
IPC: B60C11/12
Abstract: The provided is a pneumatic tire having at least one land portion in a tread surface, wherein one or more connected sipes are disposed on at least one of the land portions, the connected sipes have a main portion extending in a first predetermined direction and a side portion extending from the main portion to a side of the main portion at an angle with respect to the first predetermined direction, the side portion has a first side portion disposed on one side of the main portion and a second side portion disposed on the other side of the main portion, and the first side portion and the second side portion are arranged alternately in the tire circumferential direction.
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公开(公告)号：US20200180362A1
公开(公告)日：2020-06-11
申请号：US16622074
申请日：2018-05-16
Applicant: BRIDGESTONE CORPORATION
Inventor： Yoshio KAJI
IPC: B60C11/12
Abstract: A sipe includes a first widened and a second widened portion. In a cross section orthogonal to the sipe extending direction, the sipe includes at least one bent portion, at least one bent portion has a widened portion where the width of sipe portions sandwiching the bent portion is increased, and at least one widened portion has a straight line portion, in which an angle formed with a line segment orthogonal to the normal line at the opening center of the sipe on the tread surface is 30° or more, in a wall surface on the major angle side of the bent portion of wall surfaces defining the widened portion.
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