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公开(公告)号：US10195900B2
公开(公告)日：2019-02-05
申请号：US14905513
申请日：2014-08-04
发明人： Kazuo Asano , Yasuhiro Kubota
摘要： A pneumatic tire includes a carcass extending between bead cores of bead portions through a tread portion. A tire section width Wt (unit: mm) in relation to a bead diameter Db (unit: inch) satisfies the following equations, Wt≤−0.7257×(Db)2+42.763×Db−339.67, and Wt≥−0.7257×(Db)2+48.568×Db−552.33. In a tread thickness distribution curve f(y) represented by equation f(y)=1−t(y)/t(0), when y=0.4, the value of f(y) is of from 0.03 to 0.06, and a rate of change of the value of f(y) increases to y=0.4 and decreases thereafter, where t(y) denotes a tread thickness at each tire axial position Py, and y represents a ratio of an axial distance from the tire equatorial plane, to the maximum-width L of the carcass.
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公开(公告)号：US20140332131A1
公开(公告)日：2014-11-13
申请号：US14363356
申请日：2013-01-18
发明人： Kazuo Asano , Shintaro Tomita , Susumu Tanaka
CPC分类号： B60C9/20 , B29D30/0601 , B29D2030/0665 , B60C9/0292 , B60C11/03 , B60C13/003 , B60C19/00 , B60C2009/2012 , G01M17/022 , G01N3/56
摘要： A pneumatic tire excellent in resistance to uneven wear, and crack resistance of a groove is provided. A position, on an equator plane, of a tread surface 20 of a tire 2 is represented as a point Pc. A position, at a maximum width, of an axially outer side surface 6a of a sidewall 6 is represented as a point Pe. A position that is a mid-point, in the radial direction, between the point Pc and the point Pe, and that is on the axially outer side surface 6a, is represented as a point Pd. When an internal pressure is enhanced from an Internal pressure that is 0.05 times a normal internal pressure P to the normal internal pressure P, a value Fs of difference in amount of protrusion between an amount of protrusion Dd (mm) at the point Pd and an amount of protrusion De (mm) at the point Pe is calculated according to mathematical expression (1) in which a nominal width is represented as W (mm). The value Fs of difference in amount of protrusion is greater than −0.4 and less than 0.5. Fs=((Dd−De)/W)×100 (1)
摘要翻译： 提供了耐凹凸不均匀性和耐龟裂性优异的充气轮胎。 在轮胎2的胎面表面20的赤道平面上的位置被表示为点Pc。 侧壁6的轴向外侧面6a的最大宽度的位置被表示为点Pe。 位于点Pc和点Pe之间的径向中点，位于轴向外侧表面6a上的位置被表示为点Pd。 当从正常内部压力P的正常内部压力P的内部压力P提高内部压力到正常内部压力P时，点Pd处的突出量Dd（mm）和 根据数学表达式（1）计算点Pe处的突出量De（mm），其中标称宽度表示为W（mm）。 突出量差异的值Fs大于-0.4且小于0.5。 Fs =（（Dd-De）/ W）×100（1）
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公开(公告)号：US10343459B2
公开(公告)日：2019-07-09
申请号：US15100514
申请日：2015-01-06
发明人： Kazuo Asano , Yasuhiro Kubota
摘要： [Object] A pneumatic tire that allows reduction of the occurrence of a TGC and, at the same time, allows reduction of rolling resistance, is provided.[Solution] The tire 12 includes a band 26 disposed radially inward of a tread 14, and a belt 24 disposed radially inward of the band 26. The band 26 includes a cord that is helically wound and extends substantially in a circumferential direction. The belt 24 includes an inner layer 24a, and an outer layer 24b that is layered over the inner layer 24a and disposed radially outward of the inner layer 24a. The inner layer 24a and the outer layer 24b each include multiple cords aligned with each other. The cords in the inner layer 24a and the cords in the outer layer 24b are inclined relative to an equator plane. A direction in which the cords in the inner layer 24a are inclined relative to the equator plane is opposite to a direction in which the cords in the outer layer 24b are inclined relative to the equator plane. Absolute values of inclination angles of the cords in the inner layer 24a and the cords in the outer layer 24b relative to the equator plane are greater than or equal to 35°, and not greater than 55°.
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公开(公告)号：US10071597B2
公开(公告)日：2018-09-11
申请号：US14913600
申请日：2014-08-27
发明人： Shintaro Tomita , Susumu Tanaka , Kazuo Asano
CPC分类号： B60C3/04 , B60C9/02 , B60C9/0292 , B60C9/18 , B60C11/00 , B60C13/00 , B60C13/003 , B60C13/02 , B60C15/00 , B60C15/0036 , B60C15/06 , Y02T10/862
摘要： [Object] A pneumatic tire 2 that allows achievement of reduction of rolling resistance without taking influence on a mass into consideration, is provided.[Solution] A profile OL of the tire 2 includes a ground-contact surface 46 and a pair of side surfaces 48. In the profile OL, a zone from a point PB to a point PW is formed by three arcs. The arcs are a first arc, a second arc that extends almost outward from the first arc in the radial direction, and a third arc that extends almost outward from the second arc further in the radial direction. A ratio of a radius R2 of curvature of the second arc to a radius R1of curvature of the first arc is greater than or equal to 1.45 and not greater than 3.26. A ratio of a radius R3 of curvature of the third arc to the radius R1 of curvature of the first arc is greater than or equal to 0.45 and not greater than 0.56. Each sidewall 8 of the tire 2 has a first recess 50a and a second recess 50b that are recessed inward from the side surface 48.
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公开(公告)号：US10052916B2
公开(公告)日：2018-08-21
申请号：US14892902
申请日：2014-05-15
发明人： Kazuo Asano , Shintaro Tomita , Susumu Tanaka
摘要： In a tire 2, a difference Fs (((Dd−De)/W)×100) in an amount of protrusion is greater than −0.4 and less than 0.5. A sum Fa (((Dd+De)/W)×100) of amounts of protrusions for a sidewall 6 satisfies mathematical expressions (3) and (4) in which an aspect ratio A is used, and a difference Gs (((Da−Dh)/W)×100) in an amount of protrusion for a tread 4 satisfies mathematical expressions (6) and (7). 0.02626×A−1.8615
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公开(公告)号：US09902200B2
公开(公告)日：2018-02-27
申请号：US14772755
申请日：2014-02-06
发明人： Kazuo Asano , Shintaro Tomita
IPC分类号： B60C3/00 , B60C9/00 , B60C13/00 , B60C3/04 , B60C15/00 , B60C9/28 , B29D30/08 , B60C9/18 , G01M17/02 , B60C11/00 , B60C9/20
CPC分类号： B60C3/04 , B29D30/08 , B60C9/18 , B60C9/28 , B60C11/0083 , B60C13/003 , B60C15/0036 , B60C2009/2038 , G01M17/02
摘要： In an internal pressure state where an internal pressure that is 0.05 times a normal internal pressure P has been increased to the normal internal pressure P, amounts of protrusions at points Pa, Ph, Pd, and Pe are represented as Da (mm), Dh (mm), Dd (mm), and De (mm), respectively. A sum Fa (((Dd+De)/W)×100) of the amounts of protrusions for each sidewall 6 satisfies mathematical expressions (2) and (3) in which an aspect ratio A is used, and a difference Gs (((Da−Dh)/W)×100) in the amount of protrusion for a tread 4 satisfies mathematical expressions (5) and (6). 0.02626×A−1.8615
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公开(公告)号：US09895933B2
公开(公告)日：2018-02-20
申请号：US14892262
申请日：2014-01-20
发明人： Makoto Sugiya , Wako Iwamura , Kazuo Asano
CPC分类号： B60C7/14 , B60C7/00 , B60C7/18 , B60C23/19 , B60C2007/146
摘要： A non-pneumatic tire has high durability performance. A non-pneumatic tire is provided with: an annular tread section (2) which comes into contact with the road surface; an annular inner peripheral section (3) which is located on the inside of the tread section (2) in the radial direction of the tire; and a plurality of connection sections (4) which connect the tread section (2) and the inner peripheral section (3). The connection sections (4), the inner surface (2b) of the tread section (2), and/or the outer surface (3a) of the inner peripheral section (3) is provided with a plurality of dimples (5).
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公开(公告)号：US10155417B2
公开(公告)日：2018-12-18
申请号：US14363356
申请日：2013-01-18
发明人： Kazuo Asano , Shintaro Tomita , Susumu Tanaka
摘要： A pneumatic tire excellent in resistance to uneven wear, and crack resistance of a groove is provided. A position, on an equator plane, of a tread surface 20 of a tire 2 is represented as a point Pc. A position, at a maximum width, of an axially outer side surface 6a of a sidewall 6 is represented as a point Pe. A position that is a mid-point, in the radial direction, between the point Pc and the point Pe, and that is on the axially outer side surface 6a, is represented as a point Pd. When an internal pressure is enhanced from an internal pressure that is 0.05 times a normal internal pressure P to the normal internal pressure P, a value Fs of difference in amount of protrusion between an amount of protrusion Dd (mm) at the point Pd and an amount of protrusion De (mm) at the point Pe is calculated according to mathematical expression (1) in which a nominal width is represented as W (mm). The value Fs of difference in amount of protrusion is greater than −0.4 and less than 0.5. Fs=((Dd−De)/W)×100 (1)
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公开(公告)号：US09878582B2
公开(公告)日：2018-01-30
申请号：US13856293
申请日：2013-04-03
发明人： Kazuo Asano
CPC分类号： B60C5/00 , B60C9/0292 , B60C9/28 , B60C11/0083 , B60C2011/0033 , Y02T10/862 , Y10T152/10765
摘要： A pneumatic tire 1 includes: a tread 2; sidewalls 3; a carcass 5; and a belt 6. A distribution of a thickness Tg(y) of the tread in a region extending in an axially outward direction of the tire, is represented by equation Tg(y)=A−a×Ct(y). A represents a thickness of the tread at a crown center 17. Ct(y) represents a distribution of a displacement of the tread surface in a radially inward direction of the tire , in a region from the crown center to an end portion of the belt. a represents a coefficient selected from a range of values that are greater than or equal to 0.10, and are not greater than 0.35. A displacement Cc(y) of the carcass 5 in the radially inward direction of the tire, in a region extending in the axially outward direction of the tire from the crown center, is represented by equation Cc(y)=(1−a)×Ct(y).
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公开(公告)号：US09669660B2
公开(公告)日：2017-06-06
申请号：US14225791
申请日：2014-03-26
发明人： Kazuo Asano , Yasuhiro Kubota
CPC分类号： B60C3/04 , B60C3/00 , B60C9/0292 , B60C11/0008 , B60C11/0083 , B60C11/0332 , B60C2011/0033 , Y02T10/862
摘要： When a pneumatic tire is in a reference state of being fitted with a rim that is one inch larger than a regular rim in width, of holding 15 kPa internal pressure, and of being under no load, then a tread thickness distribution curve represented by f(y)=1−t(y)/t(0) is 0.01 to 0.03 when y=0.3; 0.03 to 0.06 when y=0.4; and 0.06 to 0.10 when y=0.5, where y denotes a ratio of a distance in an axial direction from an equator surface relative to a distance L in the axial direction between the equator surface and a maximum width position of a carcass, and t(y) denotes a tread thickness corresponding to a distance in a radial direction between an outer surface of the carcass and an outer surface of a tread at an axial direction position corresponding to y.
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