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公开(公告)号：US20210339582A1
公开(公告)日：2021-11-04
申请号：US17283173
申请日：2019-10-10
发明人： Ryohei TAKEMORI
摘要： A pneumatic tire is provided. A bead filler is disposed on an outer circumferential side of each bead core in bead portions, a side reinforcing layer having a crescent-shaped cross-section is disposed on an inner side in a tire width direction of a carcass layer in a sidewall portion, and as physical properties of a rubber that constitutes the side reinforcing layer and a rubber that constitutes the bead filler, a modulus at 100% elongation is in a range from 8.4 MPa to 10.2 MPa, a tan δ at 60° C. is in a range from 0.04 to 0.08, and JIS hardness at 20° C. is in the range from 75 to 79.
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公开(公告)号：US20220203778A1
公开(公告)日：2022-06-30
申请号：US17596010
申请日：2020-05-14
发明人： Hiraku KODA , Ryohei TAKEMORI , Yuki SASAYA
摘要： Provided is a pneumatic tire. At least one land portion is defined and formed by a plurality of circumferential main grooves provided in a tread surface. A main sipe including a body portion and a chamfered portion is formed in at least one side of the body portion. A branch sipe branching from the chamfered portion is provided. The depth of the body portion is equal to or greater than the depth of the branch sipe.
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公开(公告)号：US20240300267A1
公开(公告)日：2024-09-12
申请号：US18547626
申请日：2022-01-27
发明人： Ryohei TAKEMORI
CPC分类号： B60C11/04 , B60C2011/0346 , B60C2011/0353
摘要： A pneumatic tire includes inner intermediate lug grooves having a length L1 and outer intermediate lug grooves having a length L2 formed in inner and outer intermediate land portions, respectively, where lengths L1 and L2 satisfy L1>L2. Distances W1, W2, W3, and W4 from a tire equator to an inner shoulder main groove, an inner center main groove, an outer center main groove, and an outer shoulder main groove, respectively, satisfy 0.58≤W1/Wi≤0.62, 0.20≤W2/Wi≤0.24, 0.15≤W3/Wo≤0.19, and 0.53≤W4/Wo≤0.57 with respect to distances Wi, Wo from the tire equator to ground contact edges. A total value of a groove width WG1 of the inner shoulder main groove and a groove width WG2 of the inner center main groove is larger than a total value of a groove width WG3 of the outer center main groove and a groove width WG4 of the outer shoulder main groove.
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公开(公告)号：US20220388350A1
公开(公告)日：2022-12-08
申请号：US17755066
申请日：2020-09-30
发明人： Ryohei TAKEMORI
摘要： Provided is a run-flat tire. A first bead filler is disposed on an outer circumferential side of a bead core, a second bead filler is disposed on an outer side in a tire width direction of a turned up portion of the carcass layer along the turned up portion of the carcass layer, and a thickness G on a first reference line of a side reinforcing layer, a thickness G1 on a second reference line of the side reinforcing layer, and a thickness G2 on a third reference line of the side reinforcing layer satisfy the relationships of 0.8×G≤G1≤1.0×G and 0.5×G≤G2≤0.7×G.
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公开(公告)号：US20220161606A1
公开(公告)日：2022-05-26
申请号：US17595816
申请日：2020-05-12
发明人： Hiraku KODA , Ryohei TAKEMORI , Yuki SASAYA
IPC分类号： B60C11/12
摘要： Provided is a pneumatic tire with wet steering stability performance and dry steering stability performance enhanced in a well-balanced manner.
A dimple group is composed of a plurality of dimples (100 to 104) disposed at intervals and aligned in a tire circumferential direction. When the minimum center-to-center distance between different dimples (100, 102) in an identical dimple group is defined as K and the minimum center-to-center distance between dimples (104, 100) in different dimple groups is defined as L, the ratio L/K is 3.5 or more and 10.0 or less and the minimum center-to-center distance L is 20 mm or more and equal to or less than a ground contact length.-
公开(公告)号：US20220063335A1
公开(公告)日：2022-03-03
申请号：US17309913
申请日：2019-12-06
发明人： Ryohei TAKEMORI
摘要： A pneumatic tire includes a tread development width TDW in a tread portion and a tire maximum width SW which satisfy 0.70≤TDW/SW≤0.75. A profile line forming an outer surface of a sidewall portion in a tire meridian cross-section includes at least three arcs having mutually different radii of curvature. In the profile line, a radius of curvature R1 of an arc from a first point to a second point, a radius of curvature R2 of an arc from the second point to a tire maximum width position, and a radius of curvature R3 of an arc forming a portion on an inner side in the tire radial direction from the tire maximum width position satisfy R1>R2>R3. A height SDH in the tire radial direction from a bead heel to the tire maximum width position and a tire cross-sectional height SH satisfy 0.47≤SDH/SH≤0.50.
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公开(公告)号：US20230219378A1
公开(公告)日：2023-07-13
申请号：US17758934
申请日：2020-12-10
发明人： Ryohei TAKEMORI
CPC分类号： B60C15/0607 , B60C15/0036 , B60C2015/061
摘要： In a pneumatic tire including a bead core, a first bead filler on an outer circumference of the bead core, a carcass turned up from an inner side to an outer side around the bead core and the first bead filler, and a second bead on an outer side of a turned up portion of the carcass, a height of an upper end of the first bead filler is 10%-30% of a cross-sectional height, a turned up end of the carcass is on a radially outer side of a maximum width position, an upper end of the second bead filler is between the upper end and the turned up end, the second bead filler has a shape tapered toward the radially outer side, and thicknesses G1 to G3 of the second bead filler at predetermined positions satisfy 0.5
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公开(公告)号：US20230061615A1
公开(公告)日：2023-03-02
申请号：US17905388
申请日：2020-12-21
发明人： Ryohei TAKEMORI
摘要： A tire includes first through fourth chamfered portions where tire width direction dimensions change in a tire circumferential direction formed along respective vehicle mounting outer edges of first through fourth circumferential main grooves. A second inclined groove adjacent to a vehicle mounting outermost position of the second chamfered portion is formed. A third inclined groove adjacent to a vehicle mounting outermost position of the third chamfered portion is formed. At least one circumferential narrow groove extending in the tire circumferential direction is formed in at least one of a first land portion and a second land portion.
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