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公开(公告)号：US20230001750A1
公开(公告)日：2023-01-05
申请号：US17756300
申请日：2020-11-25
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Yuki NAGAHASHI , Masahiro NARUSE
IPC: B60C19/00
Abstract: A pneumatic tire is provided that enables communication performance and scratch resistance of a transponder to be improved, A transponder (20) that extends along a tire circumferential direction is embedded between a carcass layer (4) and an innerliner layer, and the transponder (20) is disposed between a position (P1) located on an outer side of and 15 mm away from an upper end (5e) of a bead core (5) in a tire radial direction and a position (P2) located on an inner side of and 5 mm away from an end (7e) of a belt layer (7)in the tire radial direction.
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公开(公告)号：US11541695B2
公开(公告)日：2023-01-03
申请号：US16768048
申请日：2018-11-26
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Atsushi Tanno
Abstract: A tread portion of a pneumatic tire includes a columnar wear measurement magnet that has magnetic flux density or magnetic field strength formed thereby decreased due to wear thereof along with wear of tread rubber of the tread portion and a columnar reference magnet provided at a position where the columnar reference magnet is not worn with the wear of the tread rubber. The wear measurement magnet and the reference magnet extend from a tread surface side toward a tire cavity region of the pneumatic tire, and an end of the reference magnet on the tread surface side is located farther from a tread surface where the tread portion contacts the ground than an end of the wear measurement magnet on the tread surface side.
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公开(公告)号：US11534950B2
公开(公告)日：2022-12-27
申请号：US16641147
申请日：2018-06-07
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Yuki Furubayashi , Satoru Nishio
IPC: B29C48/92 , B29C48/25 , B29C48/395 , B29C48/03 , B29C48/06
Abstract: A rubber extrusion device comprises a control plate having an adjustment flow path communicating with an extrusion flow path formed in a head and an extrusion port formed in a die is interposed between the head and the die; the control plate is slid along and between the head and the die to change a position of a communication region of the extrusion flow path with respect to the adjustment flow path at a leading end opening of the extrusion flow path to set the control plate at a desired position; and unvulcanized rubber, obtained by mixing and kneading rubber material while extruding the rubber material forward with a screw, passes through the extrusion flow path and the adjustment flow path to be extruded from the extrusion port.
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公开(公告)号：US20220402304A1
公开(公告)日：2022-12-22
申请号：US17756107
申请日：2020-09-16
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Atsuhito NAKANO , Tatsuro SHINZAWA , Kenta HOMMA
Abstract: A pneumatic tire is provided. A carcass layer includes carcass cords formed of organic fiber cords obtained by intertwining a filament bundle of organic fibers, and includes turn-up portions formed by turning up end portions of a pair of bead portions to an outer side in a tire width direction. The carcass cords have an elongation at break (EB) satisfying EB≥15%. A portion of a belt layer located in a width range of 10% of a width of a second widest belt in the belt layer on each of a left side and a right side of a tire equator line in a tire width direction has a belt angle (θc) satisfying 0.349 rad≤θc≤0.56 rad. The elongation at break (EB) of the carcass cords and the belt angle (θc) satisfy 800
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公开(公告)号：US11524531B2
公开(公告)日：2022-12-13
申请号：US16768643
申请日：2018-11-21
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Atsushi Tanno , Hiraku Koda , Jun Matsuda
Abstract: In a pneumatic tire, bead cores have a wire arrangement. In a cross-sectional view in a tire meridian direction, a tangential line and a contact point are defined. The tangential line contacts an innermost layer in a radial direction and the wire cross sections innermost and outermost in a lateral direction in the wire arrangement from a rim fitting surface side. The contact point of the tangent line is on the wire cross section on the outermost side. A gauge Wh in the lateral direction from the contact point to the rim fitting surface and an outer diameter φ of the bead wire have a relationship 2.0≤Wh/φ≤15.0. A radial height H2 of a contact portion between a body portion and a turned back portion of a carcass layer has a relationship 0.80≤H2/H1≤3.00 to a radial height H1 of the bead cores.
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Patent Agency Ranking
公开(公告)号：US20220388350A1
公开(公告)日：2022-12-08
申请号：US17755066
申请日：2020-09-30
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Ryohei TAKEMORI
Abstract: 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：US20220388340A1
公开(公告)日：2022-12-08
申请号：US17755754
申请日：2020-09-17
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Tatsuro SHINZAWA , Atsuhito NAKANO , Kenta HOMMA
Abstract: A carcass layer of a pneumatic lire includes carcass cords of organic fiber cords obtained by intertw ining a filament bundle of organic fibers, and includes turn-up portions formed by turning back end portions of the carcass layer at bead portions toward an outer side in a width direction. The carcass cords have an elongation at break (EB) satisfying EB≥15%. An averagetotal gauge (GC)of a center land portion located within a width of 10% of a width of a second widest belt in a belt layer on right and left sides of an equatorial plane in the width direction, an average thickness(SG) of a sound absorptive member inside the pneumatic tire and located within a range identical to that of the center land portion, and the elongation at break (EB) of the carcass cords satisfy 15≤GC/(GC+SG/10)×EB (%)≤25.
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公开(公告)号：US11505623B2
公开(公告)日：2022-11-22
申请号：US16611713
申请日：2018-05-08
Applicant: THE YOKOHAMA RUBBER CO., LTD.
Inventor： Yu Shinke , Kazuya Uenishi
Abstract: The present invention provides a compounding agent which, when used in a rubber composition containing a reinforcing filler, exhibits excellent dispersibility, workability, toughness, low heat build-up, and wear resistance; and a rubber composition containing the compounding agent. A modified butadiene polymer of the present invention has a functional group containing a nitrogen atom and silicon atom at a terminal, a weight average molecular weight of the modified butadiene polymer being from 1000 to 15000, and a molecular weight distribution of the modified butadiene polymer being 2.0 or less.
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公开(公告)号：US11498365B2
公开(公告)日：2022-11-15
申请号：US16620863
申请日：2018-06-05
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Atsushi Tanno , Shusaku Tomoi
Abstract: Provided is a pneumatic tire with a surface provided with a reflective layer that reflects light, the reflective layer including a transparent globule group composed of transparent globules. At least some of the transparent globules are each configured to reflect incident light incident into the transparent globule from outside, at an interface with the outside of the transparent globule, and to emit the light to the outside of the transparent globule as reflected light. The transparent globules are each configured to cause the reflected light to include more amount of non-retroreflected light than retroreflected light, the non-retroreflected light moving further away from an optical path of the incident light according to a distance from the transparent globules, being increased. The transparent globules each have an optical path of the non-retroreflected light with an angle difference of from 2.0 degrees to 2.5 degrees from the optical path of the incident light.
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公开(公告)号：US11498363B2
公开(公告)日：2022-11-15
申请号：US16079537
申请日：2017-02-20
Applicant: The Yokohama Rubber Co., LTD.
Inventor： Yasutaka Akashi
Abstract: Provided is a pneumatic tire. A partial tie rubber layer is selectively disposed between a carcass layer and an inner liner layer in an area on a tread portion on either side in a tire lateral direction excluding a center region of the tread portion such that a length of intrusion from a perpendicular line extending from an outermost edge of a belt layer in a tire lateral direction through the inner liner layer toward a tire equator of each of the partial tie rubber layers is within the range from 0 to 15 mm and a length of protrusion from the perpendicular line toward a bead portion of the partial tie rubber layer is within the range from 15 to 120 mm.
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