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公开(公告)号：US20230158841A1
公开(公告)日：2023-05-25
申请号：US17929018
申请日：2021-02-12
发明人： Masahiro NARUSE
CPC分类号： B60C23/0433 , B60C15/06 , B60C2009/0276
摘要： In a pneumatic tire with a carcass layer mounted between a pair of bead portions, a transponder is embedded in an outer side of the carcass layer in the tire width direction, a rubber member having the largest storage modulus at 20° C. of rubber members located on an outer side of the transponder in the tire width direction has a modulus M50out(0° C.) during 50% deformation at 0° C. and a modulus M50out(−20° C.) during 50% deformation at −20° C. that satisfy a relationship 0.50≤M50out(0° C.)/M50out(−20° C.)
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公开(公告)号：US20230139566A1
公开(公告)日：2023-05-04
申请号：US17907634
申请日：2021-04-01
发明人： Takashi KIDESAKI
摘要： A tire includes a main groove extending in a circumferential direction, a lug groove extending in a width direction, a land portion defined by the main groove and the lug groove, and a sipe that is a narrow groove that is formed in the land portion, extends in the width direction, and includes an end opening to the main groove. The lug groove includes a raised bottom portion formed in a central region of the land portion in the width direction. The sipe includes shallow and deep bottom portions having different depths from a tread contact surface. A deep bottom portion depth from the tread contact surface is greater than a shallow bottom portion depth and includes at least a part disposed in the central region. The raised bottom portion and the deep bottom portion are disposed overlapping each other in the circumferential direction.
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公开(公告)号：US20230130069A1
公开(公告)日：2023-04-27
申请号：US17907630
申请日：2021-04-01
发明人： Hiroshi IIZUKA
IPC分类号： B60C19/00
摘要： Provided are a tire casing life management system and a tire casing life management method. A casing life management system includes a temperature sensor that measures the temperature of a tire, a heat history amount calculation unit that calculates a heat history amount received by the tire during a first period, on the basis of a plurality of pieces of temperature information of the tire measured during the first period of at least one day, an accumulation heat amount estimation unit that estimates an accumulation heat amount which can be received by the tire during the second period set for one year, on the basis of the heat history amount in the first period, and a casing life prediction unit that predicts the remaining life period of the casing from the accumulation heat amount in the second period and a predetermined threshold.
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公开(公告)号：US20230125096A1
公开(公告)日：2023-04-27
申请号：US17907638
申请日：2021-04-02
发明人： Kento ISHIZU , Yoshifumi KOISHIKAWA
IPC分类号： B60C11/12
摘要： In a tire, an outermost circumferential groove is on the outermost side in the width direction, a center land portion and center lug grooves are on an inner side of the outermost circumferential groove in the width direction, the center lug grooves include an end opening to the outermost circumferential groove, a width-direction sipe and a circumferential sipe are on an individual side of both sides in the circumferential direction of a center lug groove of an individual pair of the center lug grooves adjacent in the circumferential direction, the width-direction sipe includes one end opening to the outermost circumferential groove to which the center lug groove opens and the other end terminating within the center land portion, and the circumferential sipe includes one end opening to the center lug groove and the other end terminating near the width-direction sipe or communicating with the width-direction sipe.
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公开(公告)号：US11633988B2
公开(公告)日：2023-04-25
申请号：US16912561
申请日：2020-06-25
发明人： Hiroyuki Yoshida
摘要： In a pneumatic tire, a groove depth H1 of each of first and second inclined lug grooves over an entire region from an opening portion to a corresponding one of first or second circumferential main grooves to a terminating end portion within a center land portion has a relationship with a maximum groove depth Hg of the corresponding one of the first or second circumferential main grooves represented by 0.80≤H1/Hg≤1.00. Additionally, a maximum groove depth H2 of each of first and second lateral grooves has a relationship with a groove depth H1e at a terminating end portion of the corresponding one of the first and second inclined lug grooves represented by 0.70≤H2/H1e≤0.90.
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公开(公告)号：US11590804B2
公开(公告)日：2023-02-28
申请号：US16485422
申请日：2018-02-13
发明人： Masataka Kubota , Noboru Kuwahara
摘要： A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction and a land portion defined by the circumferential main grooves. The land portion includes a through lug groove that passes through the land portion in the tire lateral direction and includes first and second chamfered portions formed on left and right edge portions of the through lug groove. The first chamfered portion opens at one end to one of the edge portions of the land portion and terminates at the other end at a central portion in the groove length direction of the through lug groove. The second chamfered portion opens at one end portion to one of the edge portions of the land portion and terminates at the other end portion at a central portion in the groove length direction of the through lug groove.
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公开(公告)号：US11584165B2
公开(公告)日：2023-02-21
申请号：US16961630
申请日：2018-12-12
发明人： Yuta Uchida
IPC分类号： B60C11/12
摘要： In a tread portion of a pneumatic tire, a first sipe wall surface of a sipe includes at least two first peak portions and at least one first valley portion at each position of the sipe extension direction, which are bent in a wave-like shape to form surface recesses and protrusions along a sipe depth direction. The first valley portion is sandwiched between the two first peak portions in the sipe depth direction, and extends from one end of the sipe in the extension direction to the other end of the sipe in the extension direction. A recess depth of the first valley portion with respect to the two first peak portions gradually reduces. A position of at least one of the two first peak portions in the sipe depth direction and a position of the first valley portion in the sipe depth direction become gradually closer.
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公开(公告)号：US11548327B2
公开(公告)日：2023-01-10
申请号：US16608699
申请日：2017-12-26
发明人： Takamasa Motomitsu
摘要： Provided is a bias tire including: bead cores; a bead filler disposed outward of each of the bead cores in a radial direction; and a carcass layer stretching between the bead cores, wrapping around end portions of the bead cores, the carcass layer having opposite ends turned back to be fixed, wherein in a cross section in a meridian direction, a cord on an innermost side of the carcass layer in a tire lateral direction has a curved shape projecting laterally outward at a height from 0.9 times to 1.6 times a height of a flange of a rim on which the bias tire is assembled, and in the cross section in the meridian direction, a cord on an outermost side of the carcass layer in the lateral direction has a curved shape projecting laterally outward at a height from 1.1 times to 1.6 times the height of the flange.
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公开(公告)号：US11548323B2
公开(公告)日：2023-01-10
申请号：US17257128
申请日：2019-07-01
发明人： Ryouichi Tomomatsu
摘要： Steering stability performance on dry road surfaces and steering stability performance on wet road surfaces are improved.
A land portion width Wcc of a center land portion (31) and a land portion width Wco of an outer side middle land portion (32) satisfy a relationship of Wcc
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