公开(公告)号：US12227029B2

公开(公告)日：2025-02-18

申请号：US17055481

申请日：2018-12-25

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Hiroshi Fujii

IPC: B60C11/00 ,  B60C11/03 ,  B60C11/04

Abstract: A pneumatic tire is provided. An average thickness of an undertread rubber in a center region is greater than that in a shoulder regions, a loss tangent tan δ at 60° C. of the cap tread rubber is higher than that of the undertread rubber, and the ratio CAI/UAI of a cross-sectional area CAI of the cap tread rubber to a cross-sectional area UAI of the undertread rubber is not less than 0.15 and not greater than 0.95 in the center region.

公开(公告)号：US12218417B2

公开(公告)日：2025-02-04

申请号：US18260726

申请日：2021-09-02

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Teruki Miyazaki ,  Yukihiro Kamimura ,  Tomohiro Ito

IPC: H01Q15/14 ,  H01Q1/42

Abstract: To improve quality of a radome using a cyanate ester resin for a skin layer. A radome is formed of a multilayer structure in which a plurality of skin layers are layered on a surface of a core member. The plurality of skin layers include a first fiber reinforced plastic layer containing the cyanate ester resin and a fiber material and a second fiber reinforced plastic layer containing an epoxy resin and a fiber material. The second fiber reinforced plastic layer is disposed at a position in contact with the surface of the core member. A proportion of a thickness of the second fiber reinforced plastic layer to a thickness of all of the skin layers is preferably 50% or less.

公开(公告)号：US12214625B2

公开(公告)日：2025-02-04

申请号：US17759321

申请日：2021-01-15

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Masahiro Naruse ,  Jun Matsuda ,  Heishiro Fudo ,  Eiji Shinohara ,  Shinya Ichise ,  Hiroyuki Tobari ,  Yuki Ono

IPC: B60C11/00 ,  B60C11/24

Abstract: A wear-condition-sensing device includes an element configured to generate voltage based on deformation of a tread portion during tire rotation, a voltage detection unit configured to detect the voltage generated by the element, a storage area configured to store waveform data over time of the voltage detected by the voltage detection unit, a calculation unit configured to calculate an index value of voltage change based on the waveform data stored in the storage area, and a determination unit configured to determine a progress condition of wear of the tread portion by comparing the index value calculated by the calculation unit with reference information.

公开(公告)号：US12202298B2

公开(公告)日：2025-01-21

申请号：US17260209

申请日：2019-06-25

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kenichi Matsumoto

IPC: B60C11/03 ,  B60C11/12

Abstract: In a tread pattern of a tire, a main groove side of a shoulder lug groove in a side of a first circumferential main groove inclines with respect to the width direction. In each of first intermediate lug grooves and inner lug grooves, a direction from one side toward the other side in the width direction is inclined to a side identical to a side to which the main groove side is inclined. The first intermediate lug grooves overlap with extension lines of each of the shoulder lug grooves extending from a closed end of each of the shoulder lug grooves along an inclination direction of the main groove side toward each of closed ends of the inner lug grooves. A second intermediate lug groove extends between two of the extension lines adjacent in the circumferential direction, in a direction along the extension lines.

公开(公告)号：US20250011099A1

公开(公告)日：2025-01-09

申请号：US18709923

申请日：2022-08-22

Applicant: THE YOKOHAMA RUBBER CO., LTD.

Inventor： Yusuke ISHIBASHI

IPC: B65G43/02 ,  B65G15/30

Abstract: Embedded bodies in a conveyor belt at intervals in a longitudinal direction each include a passive IC tag 3 at one side portion of the conveyor belt and a linear shaped detection element connected to the IC tag extending toward the other side portion to form a loop circuit. An embedding depth of the loop circuit into the conveyor belt is preset in advance, a transmission radio wave is emitted from a detector toward the IC tag, energization of the loop circuit 9 is determined using information transmitted from the IC tag to the detector via a return radio wave W2 emitted from the IC tag 3 in response to the transmission radio wave, and to determine a degree of wear on the surface of the conveyor belt in a range where the loop circuit 9 is embedded.

公开(公告)号：US12181079B2

公开(公告)日：2024-12-31

申请号：US18700083

申请日：2022-06-20

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Ai Momose ,  Shun Sato ,  Aya Sato ,  Tomohiro Yonaha

IPC: F16L11/08

Abstract: A hose for fluid transportation includes an inner layer, a reinforcing layer, and an outer layer. The inner layer includes a (A) layer including a thermoplastic resin composition ax made of a matrix am containing a thermoplastic resin ar and a domain ad containing a rubber ae, a (B) layer including a thermoplastic resin b or a thermoplastic resin composition bx made of a matrix bm containing a thermoplastic resin br and a domain bd containing a rubber be, and a (C) layer including a rubber composition cx. The (A), (B) and (C) layers are arranged in this order as innermost to outer layers. A 10% modulus M10 to 100% modulus M100 ratio of the (A) and (B) layer structure satisfies 0.5

公开(公告)号：US12168373B2

公开(公告)日：2024-12-17

申请号：US17270280

申请日：2019-08-22

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Daisuke Watanabe

IPC: B60C11/12 ,  B60C11/03 ,  B60C11/13

Abstract: A pneumatic tire having lug grooves in shoulder land portions that each include one end reaching at least a ground contact edge and an other end terminating in the shoulder land portion. Sipes in the shoulder land portions each include one end communicating with a shoulder main groove and an other end terminating in a ground contact region. Lug grooves in intermediate land portions each include one end communicating with the shoulder main groove and an other end terminating in the intermediate land portion. Sipes in the intermediate land portion each include one end communicating with a center main groove and an other end terminating in the intermediate land portion. Sipes in the center land portion each include one end communicating with the center main groove and an other end terminating in the center land portion without exceeding a tire center line.

公开(公告)号：US12145340B2

公开(公告)日：2024-11-19

申请号：US17266583

申请日：2019-07-02

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Yuta Takanashi

IPC: B29D30/30 ,  B29D30/24 ,  B29D30/10 ,  B29D30/14 ,  B29D30/16

Abstract: In a method of manufacturing a pneumatic tire, a placement unit is moved relative to a forming drum in a drum circumferential direction to repeatedly perform a one-side step of delivering a reinforcing wire in a folded back state in a length from a central portion toward one side in the width direction of the forming drum and compression bonding the reinforcing wire to an innerliner of an outer surface of the forming drum, and after delivering the reinforcing wire in the length toward the one side in the width direction as described above, perform an other-side step of delivering the reinforcing wire in a folded back state in a length from the central portion toward an other side in the width direction of the forming drum and compression bonding the reinforcing wire to an outer surface of the innerliner.

公开(公告)号：US12138962B2

公开(公告)日：2024-11-12

申请号：US18576033

申请日：2022-03-25

Applicant: The Yokohama Rubber Co., Ltd.

Inventor： Hiroki Sugimoto ,  Rie Nakajima

IPC: C08L9/06 ,  B60C1/00 ,  C08K3/00 ,  C08K3/36

Abstract: A rubber composition contains 10-50 parts by mass of a thermoplastic resin in 100 parts by mass of a diene rubber containing 60 mass % or more of a styrene-butadiene rubber having a styrene content of 5-30 mass % and a vinyl content of 10-35 mass %. In a mixture containing the diene rubber and the thermoplastic resin in a mass ratio of 1:1, a difference (Tga-Tgm) between a theoretical value (Tga) of a glass transition temperature of the mixture calculated based on an average glass transition temperature (Tg1) of the diene rubber and a glass transition temperature (Tg2) of the thermoplastic resin, and a measurement value (Tgm) of a glass transition temperature of the mixture, is 5-50° C., and a difference (Tg2-Tg1) is 110-150° C. An amount of the thermoplastic resin is 30 mass % or more in 100 mass % total of a plasticizer component contained in the rubber composition.

公开(公告)号：US12098270B2

公开(公告)日：2024-09-24

申请号：US16982572

申请日：2019-02-28

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Kiyohito Takahashi

IPC: C08L23/28 ,  B60C1/00 ,  B60C19/12 ,  C08K3/04 ,  C08K3/06 ,  C08K5/14 ,  C08K5/40 ,  C08K11/00 ,  C08L7/00

CPC classification number: C08L23/283 ,  B60C1/0041 ,  B60C19/122 ,  C08K3/04 ,  C08K3/06 ,  C08K5/14 ,  C08K5/40 ,  C08K11/005 ,  C08L7/00

Abstract: As the sealant material composition forming a sealant layer of a pneumatic tire provided with the sealant layer on a tire inner surface, the sealant material composition prepared by blending from 0.1 parts by mass to 20 parts by mass of a crosslinking agent, from 0.1 parts by mass to 40 parts by mass of an organic peroxide, and from 10 parts by mass to 400 parts by mass of a liquid polymer per 100 parts by mass of a butyl rubber is used.