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1. 发明公开

EP4201707A1 TIRE 审中-实审转让
公开(公告)号：EP4201707A1
公开(公告)日：2023-06-28
申请号：EP21858271.6
申请日：2021-08-16
申请人： The Yokohama Rubber Co., Ltd.
发明人： KOISHIKAWA, Yoshifumi
IPC分类号： B60C11/03 , B60C11/12
摘要： To suppress a decrease in performance on ice and snow during wear of a tread portion (10), a pneumatic tire (1) includes a circumferential main groove (20) extending in a tire circumferential direction, a land portion (30) defined by the circumferential main grooves (20), and a sipe (4) disposed in the land portion (30). The sipe (4) is formed in a zigzag shape that has an amplitude in a width direction of the sipe (4) while extending in a longitudinal direction of the sipe (4). A magnitude of the amplitude changes according to a position in a depth direction of the sipe (4). A depth (Dp) of a maximum amplitude portion (45) from an opening portion (41) of the sipe (4) in the depth direction of the sipe (4) is located at a position 30% or more of a maximum depth (Ds) of the sipe (4). The maximum amplitude portion (45) is a portion where a magnitude of the amplitude is maximum.

2. 发明授权

EP2848430B1 PNEUMATIC TIRE 有权
公开(公告)号：EP2848430B1
公开(公告)日：2018-04-25
申请号：EP13787853.4
申请日：2013-03-22
申请人： The Yokohama Rubber Co., Ltd.
发明人： SETO, Hideki , HASHIMURA, Yoshiaki , MATSUDA, Jun , ENDO, Toyoaki , KOISHIKAWA, Yoshifumi , SHIBAI, Takashi
IPC分类号： B60C5/00 , B60C5/14 , B60C9/08
CPC分类号： B60C5/14 , B60C5/00 , B60C2005/145 , B60C2005/147
摘要： The present invention provides a pneumatic tire with excellent durability that has an inner liner layer formed from a laminate made from film whose main component is thermoplastic resin and tie rubber, and that is capable of preventing the occurrence of cracking of the film or the tie rubber near the splice portion of the laminated sheet, after starting to use the tire. The pneumatic tire according to the present invention is a pneumatic tire that has an inner liner layer formed with an overlap splice at the end portions in the tire circumferential direction of a laminated sheet in which a film whose main component is thermoplastic resin and tie rubber are laminated, wherein a laminated sheet with at least one of the end portions in the tire circumferential direction having an edge line formed from straight lines continuously in the tire width direction exhibiting a zigzag shape of a triangular wave form is used as the overlap spliced laminated sheet.

3. 发明授权

EP2848431B1 PNEUMATIC TIRE 有权
公开(公告)号：EP2848431B1
公开(公告)日：2018-05-16
申请号：EP13787543.1
申请日：2013-03-22
申请人： The Yokohama Rubber Co., Ltd.
发明人： SETO, Hideki , HASHIMURA, Yoshiaki , MATSUDA, Jun , ENDO, Toyoaki , KOISHIKAWA, Yoshifumi , SHIBAI, Takashi
IPC分类号： B60C5/14
CPC分类号： B60C5/14 , B60C2005/147 , Y10T152/10495
摘要： The present invention provides a tire with excellent durability having an overlap splice portion in which an inner liner configured from a film whose main component is thermoplastic resin is adhered to an inner side of a carcass layer of a tire via a tie rubber sheet and end portions in a tire circumferential direction of the film overlap via a tie rubber across a tire width direction, wherein a crack is not generated near an overlap splice portion of an inner liner layer, after the pneumatic tire has started traveling. The pneumatic tire of the present invention includes: (a) a surface on a tire cavity side of a film positioned on a tire cavity side in the overlap splice portion is formed with a recess so that a film thickness at the overlap splice portion becomes thinner than a film thickness of portions other than the overlap splice portion, (b) a surface on a tire outer circumferential side of the film positioned on the tire cavity side in the overlap splice portion is formed flat between the overlap splice portion and the portions other than the overlap splice portion, and (c) a surface on a tire cavity side and a surface on a tire outer circumferential side of a film positioned on a tire outer circumferential side in the overlap splice portion are formed flat between the overlap splice portion and the portions other than the overlap splice portion.

4. 发明公开

EP2848431A1 PNEUMATIC TIRE 有权
标题翻译：充气轮胎
公开(公告)号：EP2848431A1
公开(公告)日：2015-03-18
申请号：EP13787543.1
申请日：2013-03-22
申请人： The Yokohama Rubber Co., Ltd.
发明人： SETO, Hideki , HASHIMURA, Yoshiaki , MATSUDA, Jun , ENDO, Toyoaki , KOISHIKAWA, Yoshifumi , SHIBAI, Takashi
IPC分类号： B60C5/14
CPC分类号： B60C5/14 , B60C2005/147 , Y10T152/10495
摘要： The present invention provides a tire with excellent durability having an overlap splice portion in which an inner liner configured from a film whose main component is thermoplastic resin is adhered to an inner side of a carcass layer of a tire via a tie rubber sheet and end portions in a tire circumferential direction of the film overlap via a tie rubber across a tire width direction, wherein a crack is not generated near an overlap splice portion of an inner liner layer, after the pneumatic tire has started traveling.
The pneumatic tire of the present invention includes:
(a) a surface on a tire cavity side of a film positioned on a tire cavity side in the overlap splice portion is formed with a recess so that a film thickness at the overlap splice portion becomes thinner than a film thickness of portions other than the overlap splice portion,
(b) a surface on a tire outer circumferential side of the film positioned on the tire cavity side in the overlap splice portion is formed flat between the overlap splice portion and the portions other than the overlap splice portion, and
(c) a surface on a tire cavity side and a surface on a tire outer circumferential side of a film positioned on a tire outer circumferential side in the overlap splice portion are formed flat between the overlap splice portion and the portions other than the overlap splice portion.
摘要翻译：本发明提供一种具有重叠接合部的耐久性优异的轮胎，其中由主要成分为热塑性树脂的膜构成的内衬经由连结橡胶片粘合到轮胎的胎体层的内侧，并且端部在所述充气轮胎开始行驶之后，在所述膜的轮胎周向上经由连接橡胶在轮胎宽度方向上重叠，其中在内衬层的重叠连接部分附近不产生裂纹。本发明的充气轮胎包括：（a）重叠接合部中位于轮胎空腔侧的膜的轮胎空腔侧上的表面形成有凹部，使得交叠接合部处的膜厚变薄（b）重叠接合部中位于轮胎空腔侧的膜的轮胎外周侧的表面平坦地形成在重叠接合部和其他部分之间（c）重叠接合部中位于轮胎外周侧的膜的轮胎空腔侧的面和轮胎外周侧的面平坦地形成在重叠接合部与重叠接合部之间除了重叠拼接部分之外的部分。

5. 发明公开

EP4212361A1 TIRE 审中-实审转让
公开(公告)号：EP4212361A1
公开(公告)日：2023-07-19
申请号：EP21866887.9
申请日：2021-09-10
申请人： The Yokohama Rubber Co., Ltd.
发明人： KOISHIKAWA, Yoshifumi
IPC分类号： B60C11/12 , B60C5/00 , B60C11/03
摘要： Provided is a tire that can provide improved braking performance on ice and running performance on snow. Provided in a tread portion are a plurality of circumferential main grooves, a plurality of lug grooves extending in a direction intersecting the circumferential main grooves, and a plurality of land portions defined by the circumferential main grooves and arranged in the direction intersecting the circumferential main grooves. A specific land portion that is at least one of the land portions includes, in a ground contact surface, a plurality of sipes extending in the direction intersecting the circumferential main grooves and a plurality of narrow grooves extending in the direction intersecting the circumferential main grooves and having a groove depth of 1.50 mm or less. In a central region in the tire width direction, the sipes and the narrow grooves have different directions extending in the tire circumferential direction when extending from one side toward another side in a width direction. In both edge regions on an outer side from the central region in the tire width direction, the sipes and the narrow grooves have the same direction extending in the tire circumferential direction when extending from the one side toward the other side in the width direction. The specific land portion includes a land portion including at least one land portion on an outer side in the tire width direction.

6. 发明公开

EP4190594A1 TIRE 审中-实审转让
公开(公告)号：EP4190594A1
公开(公告)日：2023-06-07
申请号：EP21851220.0
申请日：2021-07-29
申请人： The Yokohama Rubber Co., Ltd.
发明人： KOISHIKAWA, Yoshifumi
IPC分类号： B60C11/03
摘要： To ensure performance on snow and wet performance while suppressing a decrease in performance on ice, a pneumatic tire (1) includes circumferential grooves (30) extending in a tire circumferential direction, lug grooves (40) extending in a tire width direction, land portions (20) defined by the circumferential grooves (30) and the lug grooves (40), and a circumferential narrow groove (50) that extends in the tire circumferential direction and is disposed in the land portion (20). The at least one circumferential groove (30) among the circumferential grooves (30) that define the land portion (20) in which the circumferential narrow groove (50) is disposed having an amplitude in the tire width direction while extending in the tire circumferential direction to be formed in zigzag shape including a long portion (32) and a short portion (33) having relatively different lengths. The circumferential narrow groove (50) has one or more bent portions (51) where an extension direction changes in the land portion (20) to include a long portion (50a) and a short portion (50b) having relatively different lengths. The long portion (50a) of the circumferential narrow groove (50) has an inclination direction in the tire width direction with respect to the tire circumferential direction in a direction opposite to the long portion (32) of the circumferential groove (30).

7. 发明公开

EP2848430A1 PNEUMATIC TIRE 有权
标题翻译：充气轮胎
公开(公告)号：EP2848430A1
公开(公告)日：2015-03-18
申请号：EP13787853.4
申请日：2013-03-22
申请人： The Yokohama Rubber Co., Ltd.
发明人： SETO, Hideki , HASHIMURA, Yoshiaki , MATSUDA, Jun , ENDO, Toyoaki , KOISHIKAWA, Yoshifumi , SHIBAI, Takashi
IPC分类号： B60C5/00 , B60C5/14 , B60C9/08
CPC分类号： B60C5/14 , B60C5/00 , B60C2005/145 , B60C2005/147
摘要： The present invention provides a pneumatic tire with excellent durability that has an inner liner layer formed from a laminate made from film whose main component is thermoplastic resin and tie rubber, and that is capable of preventing the occurrence of cracking of the film or the tie rubber near the splice portion of the laminated sheet, after starting to use the tire. The pneumatic tire according to the present invention is a pneumatic tire that has an inner liner layer formed with an overlap splice at the end portions in the tire circumferential direction of a laminated sheet in which a film whose main component is thermoplastic resin and tie rubber are laminated, wherein a laminated sheet with at least one of the end portions in the tire circumferential direction having an edge line formed from straight lines continuously in the tire width direction exhibiting a zigzag shape of a triangular wave form is used as the overlap spliced laminated sheet.
摘要翻译：本发明提供一种具有优异耐久性的充气轮胎，其具有由主要成分为热塑性树脂和结合橡胶的膜制成的层压材料形成的内衬层，并且能够防止膜或连接橡胶发生破裂在开始使用轮胎之后，在层压片材的拼接部分附近。本发明的充气轮胎是在主成分为热塑性树脂和连接橡胶的膜为层叠片的轮胎周向的端部具有重叠接合部的内衬层的充气轮胎，其特征在于，作为所述重叠接合层叠片，使用在轮胎周向上的至少一个端部具有由呈直角三角波状锯齿状的轮胎宽度方向连续的直线构成的边缘线的层叠片。

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