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公开(公告)号：US11667156B2
公开(公告)日：2023-06-06
申请号：US17689476
申请日：2022-03-08
发明人： Hiroaki Koga , Hiroshi Kikuchi
CPC分类号： B60C11/005 , B60C11/0008 , B60C11/0058 , B60C11/0075 , B60C11/0083 , B60C11/0327 , B60C11/01 , B60C2011/0016 , B60C2011/0025 , B60C2011/0033
摘要： In a tire, a tread includes a cap layer forming a part of an outer surface of the tire, a base layer disposed inwardly of the cap layer in a radial direction, and an intermediate layer disposed between the cap layer and the base layer in the radial direction. A loss tangent of the intermediate layer at 30° C. is less than a loss tangent of the cap layer at 30° C. and a loss tangent of the base layer at 30° C. is less than the loss tangent of the intermediate layer at 30° C. The tread includes at least two three-layer body portions formed of the cap layer, the intermediate layer, and the base layer, and at least one two-layer body portion that is formed of the cap layer and the base layer and disposed between a first three-layer body portion and a second three-layer body portion.
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公开(公告)号：US10696102B2
公开(公告)日：2020-06-30
申请号：US15274371
申请日：2016-09-23
发明人： Hiroshi Kikuchi
摘要： A tire includes a tread portion being provided with a pair of circumferentially and continuously extending shoulder main grooves and at least one crown main groove between the shoulder main grooves to form a pair of middle portions each of which is between adjacent one crown main groove and one shoulder main groove. Each of the middle portions is provided with a circumferentially and continuously extending longitudinal sipe, a plurality of inner middle sipes extending axially outwardly from the crown main groove and terminating without reaching the longitudinal sipe and a plurality of outer middle sipe extending axially inwardly from the shoulder main groove and terminating without reaching the longitudinal sipe. The number of the outer middle sipes is greater than the number of the inner middle sipes.
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公开(公告)号：US11667157B2
公开(公告)日：2023-06-06
申请号：US17555662
申请日：2021-12-20
发明人： Hiroshi Kikuchi
CPC分类号： B60C11/0083 , B60C11/005 , B60C11/0327 , B60C2011/0025 , B60C2011/0033
摘要： In a tire, a tread includes a cap layer forming a part of the outer surface of the tire, an intermediate layer disposed inwardly of the cap layer in the radial direction, and a base layer disposed inwardly of the intermediate layer in the radial direction. A loss tangent of the intermediate layer at 30° C. is less than a loss tangent of the cap layer at 30° C., and a loss tangent of the base layer at 30° C. is less than the loss tangent of the intermediate layer at 30° C. An outer end of the cap layer is disposed outwardly of an outer end of the base layer in the axial direction. In the radial direction, a position of the outer end of the cap layer coincides with a position of the outer end of the base layer, or the outer end of the cap layer is disposed inwardly of the outer end of the base layer.
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公开(公告)号：US11633993B2
公开(公告)日：2023-04-25
申请号：US17197891
申请日：2021-03-10
发明人： Hiroshi Kikuchi , Takuya Osawa , Hiroki Uno , Kentaro Yagyu
摘要： A tire 2 includes a tread 4, a pair of sidewalls 6, a pair of beads 10, a carcass 12, a belt 14, an inner liner 20, and a pair of insertion layers 22 disposed between the carcass 12 and the inner liner 20. Each insertion layer 22 is disposed between an end of the belt 14 and an end PB of the bead 10. Each insertion layer 22 has a volume resistivity of less than 108 Ω·cm. A complex elastic modulus of the insertion layer 22 is equivalent to or higher than a complex elastic modulus of the inner liner 20. A thickness of each sidewall 6 at a maximum width position PW is not greater than 5.0 mm.
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