Patents by Inventor Isao Kuwayama
Isao Kuwayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12214681Abstract: A tire/wheel assembly includes a wheel including a disk and a rim, the wheel having a power reception device attached to an inner peripheral surface of the rim to receive electric power supplied wirelessly from farther outward in a radial direction of the wheel than the rim, and a tire attached so as to cover an outer peripheral surface of the wheel and including a pair of bead portions. Each bead portion in the pair of bead portions includes a bead core and a bead filler, and 0.1?BFW/BDW?0.6, where BFW is a width in a tire width direction at a central position of the bead filler in a tire radial direction, and BDW is a maximum width in the tire width direction of the bead core.Type: GrantFiled: July 22, 2020Date of Patent: February 4, 2025Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Patent number: 12214682Abstract: A tire/wheel assembly includes a wheel including a disk and a rim, the wheel having a power reception device attached to an outer peripheral surface of the rim to receive electric power supplied wirelessly from farther outward in a radial direction of the wheel than the rim, and a tire attached so as to cover an outer peripheral surface of the wheel and including a pair of sidewall portions. A gauge of the sidewall portions is 1.5 mm or more.Type: GrantFiled: July 22, 2020Date of Patent: February 4, 2025Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Publication number: 20250033418Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire, and includes only one circumferential main groove extending in a tire circumferential direction on a tread contact surface, the circumferential main groove being provided to a half portion of the tire on a vehicle-mounted inward side, which is one side of the tire in a tread width direction with a tire equatorial plane as a boundary. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: January 30, 2025Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Taiga ISHIHARA
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Publication number: 20250010866Abstract: In order to improve vehicle controllability, an information processing device 1 that is able to communicate with a vehicle 5 via a network includes a controller, the controller executing operations including acquiring tire-related information, calculating a driving control parameter based on the tire-related information, and transmitting the driving control parameter to the vehicle 5.Type: ApplicationFiled: July 26, 2022Publication date: January 9, 2025Applicant: BRIDGESTONE CORPORATIONInventors: Tadashi WAKIYAMA, Isao KUWAYAMA, Kazuo UCHIDA, Takao KOBAYASHI
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Publication number: 20250001808Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire and includes one or more circumferential main grooves extending in a tire circumferential direction on a tread contact surface. A negative ratio of a half portion of the tire on a vehicle-mounted inward side, which is one side of the tire in a tread width direction with the tire equatorial plane as a boundary, is greater than a negative ratio of the other half portion of the tire on a vehicle-mounted outward side, which is the other side of the tire in the tread width direction with the equatorial plane as the boundary. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: January 2, 2025Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Taiga ISHIHARA
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Publication number: 20240424835Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire and includes one or more circumferential main grooves extending in a tire circumferential direction on a tread contact surface. A negative ratio of a half portion of the tire on a vehicle-mounted outward side, which is one side of the tire in a tread width direction with the tire equatorial plane as a boundary, is greater than a negative ratio of the other half portion of the tire on a vehicle-mounted inward side, which is the other side of the tire in the tread width direction with the equatorial plane as the boundary. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: December 26, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Shintaro HATANAKA
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Publication number: 20240416685Abstract: The pneumatic radial tire for passenger vehicles of this disclosure comprises a communication device. A cross-sectional width SW and an outer diameter OD of the tire satisfy a predetermined relationship, and in a cross-sectional view in a tire width direction in a reference condition, the communication device is provided in a tire portion sandwiched between a hypothetical line extending in a tire radial direction through a ground contact edge and a hypothetical line extending in the tire width direction through a tire maximum width position.Type: ApplicationFiled: June 23, 2022Publication date: December 19, 2024Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Publication number: 20240408916Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire, grooves in a contact patch consisting only of grooves having a groove width of 2 mm or less, and the contact patch includes one or more block-shaped land portion defined by two or more circumferential grooves and two or more width direction grooves. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: December 12, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Shintaro HATANAKA
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Publication number: 20240408917Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire, and includes only two circumferential main grooves extending in a tire circumferential direction on a tread contact surface, a barycenter of the circumferential main grooves being provided to a half portion of the tire on a vehicle-mounted inward side, which is one side of the tire in a tread width direction with a tire equatorial plane as a boundary. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: December 12, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Shintaro HATANAKA
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Publication number: 20240408915Abstract: A pneumatic radial tire for passenger vehicles that satisfies a defined relationship between sectional width SW and outer diameter OD of the tire, and includes only one circumferential main groove extending in a tire circumferential direction on a tread contact surface, the circumferential main groove being provided to a half portion of the tire on a vehicle-mounted outward side, which is one side of the tire in a tread width direction with a tire equatorial plane as a boundary. A drop height (or ground contact length relationship, or tread gauge relationship) is also defined.Type: ApplicationFiled: June 23, 2022Publication date: December 12, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Taiga ISHIHARA
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Publication number: 20240399795Abstract: The pneumatic radial tire for passenger vehicles of this disclosure comprises a belt consisting of one or more belt layers, a tread, and a communication device. A cross-sectional width SW and an outer diameter OD of the tire satisfy a predetermined relationship, belt cords constituting the belt layer are non-metallic cords, and the communication device is installed in the tread.Type: ApplicationFiled: June 23, 2022Publication date: December 5, 2024Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Patent number: 12115871Abstract: A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.Type: GrantFiled: July 22, 2020Date of Patent: October 15, 2024Assignees: THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATION, NSK Ltd.Inventors: Hiroshi Fujimoto, Takehiro Imura, Osamu Shimizu, Katsuhiro Hata, Keizo Akutagawa, Yasumichi Wakao, Isao Kuwayama, Daisuke Gunji
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Publication number: 20240300268Abstract: A tire comprises: a projecting portion that projects outward in a tire width direction from a tire outer circumferential surface of a sidewall portion; and a communication device embedded in the projecting portion.Type: ApplicationFiled: November 17, 2021Publication date: September 12, 2024Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Patent number: 12083833Abstract: A pneumatic radial tire for passenger vehicles of the present disclosure includes a carcass toroidally spanning between a pair of bead portions and including plies of radially arranged cords. A sectional width SW (mm) and an outer diameter OD (mm) of the tire satisfy a predetermined relational expression. At least one noise reducer is provided on an inner surface of the tire. The noise reducer is provided at least in the center region and the shoulder region. Among thicknesses of the noise reducer measured in a direction perpendicular to the inner surface of the tire, a maximum thickness Ts in the shoulder regions is larger than a maximum thickness Tc in the center region.Type: GrantFiled: July 8, 2019Date of Patent: September 10, 2024Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Publication number: 20240270022Abstract: A pneumatic tire comprises a tread in contact with a road surface and a pair of inclined belts with crossing cords. A volume of the groove portion formed on the tread of inside when mounted to the vehicle based on a tire equatorial line being less than volume of the groove portion formed on the tread of outside when mounted to the vehicle based on the tire equatorial line, and the pneumatic tire is provided with a reinforcing belt covering a plurality of reinforcing cords extending in the tire width direction and along tire radial direction and arranged at a predetermined distance between the inclined belts and the tread. The reinforcing belt extends from the outside when mounted to the vehicle to the inside when mounted to the vehicle.Type: ApplicationFiled: March 28, 2022Publication date: August 15, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Ietomo MATSUNAGA, Isao KUWAYAMA
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Publication number: 20240270023Abstract: A pneumatic tire is provided with an outside reinforcing belt provided in the tire radial direction outside rather than crossing belts and covering a plurality of reinforcing cords extended along the tire width direction and the tire radial direction and arranged at a predetermined distance from each other, and an inside reinforcing belt 55 provided in the tire radial direction inside of a carcass and covering a plurality of reinforcing cords extended along the tire width direction and the tire radial direction and arranged at a predetermined distance from each other.Type: ApplicationFiled: September 9, 2022Publication date: August 15, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Sho FUKUZAKI, Yuya SUDA, Takemi YAMANE, Isao KUWAYAMA
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Publication number: 20240253398Abstract: A pneumatic tire comprises a tread in contact with a road surface and a pair of inclined belts with crossing cords. A volume of the groove portion formed on the tread of outside when mounted to the vehicle based on a tire equatorial line being less than volume of the groove portion formed on the tread of inside when mounted to the vehicle based on the tire equatorial line, and the pneumatic tire is provided with a reinforcing belt covering a plurality of covering cords extending in the tire width direction and along tire radial direction and arranged at a predetermined distance between the inclined belts and the tread. The reinforcing belt extends from the outside when mounted to the vehicle to the inside when mounted to the vehicle.Type: ApplicationFiled: March 28, 2022Publication date: August 1, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Ietomo MATSUNAGA, Isao KUWAYAMA
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Publication number: 20240246364Abstract: A tire comprises: a belt composed of one or more belt layers; a main groove on a tread surface; and a communication device embedded at a position that is inward in a tire radial direction from a groove bottom of the main groove, outward in the tire radial direction from an inner surface of an innermost belt layer in the belt, and outward in a tire width direction from a minimum width belt layer in the belt, wherein a tire radial outer side of the communication device is not covered with the belt.Type: ApplicationFiled: November 17, 2021Publication date: July 25, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Takashi SHIMURA
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Publication number: 20240059103Abstract: The pneumatic tire for passenger vehicles according to the present disclosure comprises a carcass consisting of plies of radially arranged cords, spanning toroidally between a pair of bead portions; the cross-sectional width SW and the outer diameter OD of the tire satisfy a given relationship; the land portion has a plurality of width direction sipes extending in the tire width direction; the pitch length in the tire circumferential direction of the plurality of width direction sipes is 3 mm to 10 mm; and the width direction sipe has a widened portion on the sipe bottom side where the sipe width is larger than that on the tread surface side.Type: ApplicationFiled: June 2, 2021Publication date: February 22, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Shintaro HATANAKA
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Publication number: 20240042802Abstract: The pneumatic radial tire for passenger vehicles according to the present disclosure comprises a carcass consisting of plies of radially arranged cords, spanning toroidally between a pair of bead portions; the cross-sectional width SW and the outer diameter OD of the tire satisfy a given relationship; the tire has a tread portion with tread rubber; the rubber gauge of the tread rubber is 2 mm or more and less than 5 mm; and the negative ratio of the tread surface of the tread portion is 20% or less.Type: ApplicationFiled: June 2, 2021Publication date: February 8, 2024Applicant: BRIDGESTONE CORPORATIONInventors: Isao KUWAYAMA, Shintaro HATANAKA