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公开(公告)号：US11691461B2
公开(公告)日：2023-07-04
申请号：US16865845
申请日：2020-05-04
发明人： Hiroshi Yamaoka , Koichi Nakajima
CPC分类号： B60C11/1353 , B60C11/0304 , B60C11/1236 , B60C2011/1361
摘要： A tyre includes a tread portion provided with a circumferential groove and a lateral groove. The at least one lateral groove includes a connected portion connected to the circumferential groove. The circumferential groove includes a groove bottom provided with groove bottom protruding portions protruding outwardly in the tyre radial direction. Each groove bottom protruding portion includes a first surface portion extending in the tyre radial direction and facing a first circumferential direction, and a second surface portion arranged on a second circumferential direction opposite to the first circumferential direction and extending at a larger angle with respect to the tyre radial direction than that of the first surface portion. In a tread plan view, at least a part of the groove bottom protruding portions is located in a lateral-groove extended region in which the connected portion is extended into the circumferential groove along the tyre axial direction.
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公开(公告)号：US11633989B2
公开(公告)日：2023-04-25
申请号：US17351939
申请日：2021-06-18
发明人： Koichi Nakajima
摘要： The tire includes a tread portion 2 having at least one groove 3 that includes two groove walls 6. At least one of the groove walls 6 has a protrusion 10 that protrudes from the groove wall 6. The protrusion 10 includes at least two ribs 11 that extend in a length direction of the groove 3 and are spaced from each other in the tire radial direction, and a joining portion 12 for joining the ribs 11 to each other. Each rib 11 protrudes from the groove wall 6 so as to form such an inclination that the rib 11 is inclined outward from the groove wall 6 in a tire radial direction.
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公开(公告)号：US11623479B2
公开(公告)日：2023-04-11
申请号：US17275228
申请日：2019-08-07
发明人： Koichi Nakajima
IPC分类号： B60C11/12
摘要： A tire having a tread portion that is provided with sipes. Four sipe segments of the sipe include a first sipe segment, a second sipe segment, a third sipe segment, and a fourth sipe segment. At least one of the first sipe segment and the third sipe segment includes, in the cross section orthogonal to the length direction, an oscillated portion which extends in the tire radial direction, while oscillating in the lateral direction orthogonal to the length direction.
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公开(公告)号：US11607916B2
公开(公告)日：2023-03-21
申请号：US16292637
申请日：2019-03-05
发明人： Koichi Nakajima
摘要： A mark indicating portion arranged on a sidewall portion is provided with a reference surface provided on a surface of the sidewall portion and one or more marks formed on the reference surface. A surface of the or each mark is provided with a ridge line extending obliquely with respect to a tyre radial direction, a first surface portion positioned on an outer side in the tyre radial direction of the ridge line, and a second surface portion positioned on an inner side in the tyre radial direction of the ridge line. Each of the first surface portion and the second surface portion is inclined in a direction in which a height thereof from the reference surface is decreased as it goes away from the ridge line.
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公开(公告)号：US11059331B2
公开(公告)日：2021-07-13
申请号：US16273269
申请日：2019-02-12
发明人： Koichi Nakajima
摘要： A mark indicating portion comprises a reference surface provided on a surface of a sidewall portion and marks formed on the reference surface. A surface of each of the marks is inclined with respect to the reference surface in a direction in which a height thereof increases from one side to the other side in a tyre circumferential direction.
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公开(公告)号：US11654723B2
公开(公告)日：2023-05-23
申请号：US17656410
申请日：2022-03-24
发明人： Koichi Nakajima
CPC分类号： B60C11/11 , B60C11/1392
摘要： A tire 1 includes a tread portion 2 provided with a block 3. A block corner portion 5 of the block 3 has a stepped chamfered portion 7 formed therein in which a block height decreases stepwise from a tread surface 3a toward a top portion 3b. The stepped chamfered portion 7 includes upper surfaces 10 parallel to the tread surface 3a, and step corner portions 12 each formed so as to protrude toward a block outer side as a result of the upper surface 10 and a vertical surface 11 or the vertical surface 11 and the tread surface 3a intersecting each other. An angle θ1 between the tread surface 3a and a virtual straight line n3 connecting the step corner portions 12 in a vertical cross-sectional view, of the block corner portion 5, passing through the top portion 3b is 10 to 40 degrees.
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公开(公告)号：US11446964B2
公开(公告)日：2022-09-20
申请号：US16360234
申请日：2019-03-21
发明人： Koichi Nakajima
摘要： A tyre includes a tread portion having a tread surface provided with grooves extending in a tyre axial direction. The grooves each include an opening formed on the tread surface, a minimum portion located inwardly in a tyre radial direction of the opening and having a groove width being locally minimum, and a maximum portion located inwardly in the tyre radial direction of the minimum portion and having a groove width being locally maximum in a region inwardly in the tyre radial direction of the opening.
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公开(公告)号：US11446962B2
公开(公告)日：2022-09-20
申请号：US16226758
申请日：2018-12-20
发明人： Shintaro Tomita , Koichi Nakajima
摘要： A tire comprises a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions. The land portion is provided with axial grooves extending thereacross in the tire axial direction, and each comprising a radially outer portion and a radially inner portion which is wider than the radially outer portion. The radially outer portion of each of the axial grooves is crossed by one ore more sipes.
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公开(公告)号：US11247511B2
公开(公告)日：2022-02-15
申请号：US16241590
申请日：2019-01-07
发明人： Koichi Nakajima
摘要： A circumferential groove has a groove bottom and a pair of groove walls. Groove bottom includes groove bottom protruding portions protruding radially outwardly from a groove bottom reference surface and having a first groove bottom surface extending radially. The first groove bottom surface includes a first surface portion on one side of a center line of the circumferential groove and a second surface portion positioned on the other side, and an angle between them is 20° to 170°. The groove wall includes groove wall protruding portions protruding toward an inside of the circumferential groove from a groove wall reference surface defined as a circumferential surface at a widest groove width position of the circumferential groove and having a first groove wall width surface 12 extending in a tyre width direction and a second groove wall surface having an angle larger than the first groove wall width surface.
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公开(公告)号：US20210178830A1
公开(公告)日：2021-06-17
申请号：US17103664
申请日：2020-11-24
发明人： Koichi Nakajima
摘要： A tyre includes a tread portion having a tread surface being provided with a plurality of lateral grooves extending in a tyre axial direction. In a cross-sectional view perpendicular to a longitudinal direction of the at least one of the plurality of lateral grooves, the at least one of the plurality of lateral grooves includes a pair of groove walls and a groove bottom. At least one of the pair of groove walls includes a serrated portion including first surfaces and second surfaces that are arranged alternately. Each first surface is inclined outwardly in a groove width direction toward the groove bottom and has a radially inner end thereof, and each second surface extends substantially parallel with the tread surface from the radially inner end of a respective one of the first surfaces toward a groove centerline of the at least one of the plurality of lateral grooves.
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