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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Publication number: 20220024250Abstract: 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 and an outer diameter OD of the tire satisfy a predetermined relational expression. At least one noise reducer is provided on an inner surface of the tire. A ratio L (mm)/S (mm2) is in a range from 0.02 to 1.5, where L (mm) denotes a circumferential length of the noise reducer and S (mm2) denotes a cross-sectional area of the noise reducer.Type: ApplicationFiled: July 8, 2019Publication date: January 27, 2022Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Publication number: 20220016943Abstract: 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 and an outer diameter OD of the tire satisfy a predetermined relational expression. The noise reducer is provided on an inner surface of the tire at least in the center region and the shoulder regions. Among thicknesses of the noise reducer measured in a direction perpendicular to the inner surface of the tire, a maximum thickness Tc in the center region is larger than a maximum thickness Ts in the shoulder regions.Type: ApplicationFiled: July 8, 2019Publication date: January 20, 2022Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Publication number: 20220001706Abstract: 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: ApplicationFiled: July 8, 2019Publication date: January 6, 2022Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Publication number: 20200376892Abstract: A pneumatic tire comprising a carcass 11, at least one inclined belt layer 13 having a cord extending inclined at an angle of 30° or more relative to the tire circumferential direction, and a tread 15 arranged outward in the tire radial direction of the inclined belt layer 13, wherein a circumferential cord layer 14 arranged inward in the tire radial direction of the tread 15 has a high-rigidity region and a low-rigidity region and the high-rigidity region has a higher negative ratio in a ground contact width of the tread 15 than the low-rigidity region.Type: ApplicationFiled: December 22, 2017Publication date: December 3, 2020Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Publication number: 20200376893Abstract: A pneumatic tire comprising a carcass 11, at least one inclined belt layer 13 having a cord extending inclined at an angle of 30° or more relative to the tire circumferential direction, and a tread 15 arranged outward in the tire radial direction of the inclined belt layer 13, wherein a circumferential cord layer 14 arranged inward in the tire radial direction of the tread 15 has a high-rigidity region and a low-rigidity region and the high-rigidity region has a lower negative ratio in a ground contact width of the tread 15 than the low-rigidity region.Type: ApplicationFiled: December 22, 2017Publication date: December 3, 2020Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Patent number: 10836213Abstract: A passenger vehicle pneumatic tire comprising: a carcass; and inclined belt layers and a circumferential belt layer, wherein: the inclined belt layers include at least two inclined belt layers having different tire widthwise widths; an inclination angle ?1 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the widest width and an inclination angle ?2 with respect to the tire circumferential direction of the cords forming the inclined belt layer having the narrowest width satisfy correlations that 30°??1?85°, 10°??2?30°, and ?1>?2; and a tire widthwise width W1 of the inclined belt layer having the widest width and a tire widthwise width W2 of the inclined belt layer having the narrowest width satisfy a correlation that W2?0.6W1.Type: GrantFiled: July 7, 2014Date of Patent: November 17, 2020Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Publication number: 20200198402Abstract: A pneumatic tire comprising a carcass 12, at least one inclined belt layer 13, at least one first circumferential cord layer 14 arranged inward in the tire radial direction of the inclined belt layer 13, a tread 16 arranged outward in the tire radial direction of the inclined belt layer 13, and a second circumferential cord layer 15 which is arranged outward in the tire radial direction so as to cover a tire width direction end of the inclined belt layer 13, and where X is defined as X=Y=n×m×d, Y is the Young's modulus (GPa) of the cord, n is the number of cords implanted (cords/50 mm), d is the cord diameter (mm), and m is the number of the first circumferential cord layers 14, X is smaller than X of the first circumferential cord layer 14.Type: ApplicationFiled: December 22, 2017Publication date: June 25, 2020Applicant: BRIDGESTONE CORPORATIONInventor: Isao KUWAYAMA
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Patent number: 10639936Abstract: A pneumatic tire comprises, in a tread surface: at least two circumferential main grooves continuously extending in a tire circumferential direction; and at least one rib-like land portion each defined by two adjacent circumferential main grooves from among the at least two circumferential main grooves. The rib-like land portion has: a circumferential sipe including a circumferential sipe portion extending in the tire circumferential direction; and a both-end closed sipe having both ends terminating within the rib-like land portion. When a land portion width of the rib-like land portion is evenly divided by three where a region at a center in a tire width direction is a center region and regions on both sides of the center region in the tire width direction are side regions, the circumferential sipe portion is located only in the center region, and the both-end closed sipe is located in any of the side regions.Type: GrantFiled: July 14, 2016Date of Patent: May 5, 2020Assignee: BRIDGESTONE CORPORATIONInventors: Shintaro Hatanaka, Isao Kuwayama
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Patent number: 10556466Abstract: A tire comprising: a carcass; and inclined belt layers and a circumferential belt layer, wherein: the circumferential belt layer satisfies a correlation that X?750 when it is defined that X=Y×n×m, where Y is a Young's modulus in GPa of the cords forming the circumferential belt layer, n is a number of the cords implanted per 50 mm of width, and m is a number of layers of the circumferential belt layer; the inclined belt layers comprise at least two inclined belt layers having different tire widthwise widths; and a tire widthwise width W1 of an inclined belt layer having a widest width and a tire widthwise width W2 of an inclined belt layer having a narrowest width satisfy a correlation that W2?0.6W1.Type: GrantFiled: July 7, 2014Date of Patent: February 11, 2020Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Patent number: 10486473Abstract: When a tire is attached to a rim and set to an internal pressure of 250 kPa or more, a ratio SW/OD of the tire is 0.26 or less in the case where SW of the tire is less than 165 (mm), and SW and OD satisfy a relationship 2.135×SW+282.3?OD in the case where SW is 165 (mm) or more. The tread rubber has dynamic storage modulus E? of 6.0 MPa to 12.0 MPa, and loss tangent tan ? of 0.05 to 0.15. In at least one land portion, sipes are arranged with a predetermined pitch length L, and a land portion width W, a tire widthwise sipe component total length Ws of the sipes, the pitch length L, and a tire circumferential sipe component total length Ls of the sipes satisfy relationships 0.4W?Ws?1.2W and 0.6L?Ls?3L.Type: GrantFiled: September 8, 2015Date of Patent: November 26, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Shintaro Hatanaka, Isao Kuwayama
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Publication number: 20190337041Abstract: A sheet material machining system includes a sheet material machining machine which is configured to machine a workpiece to produce a machined workpiece that includes a plurality of products and a residual material. The machined workpiece is configured to be placed on a sorting table. The plurality of products are configured to be placed on a temporary placement table. At least one product among the plurality of products are configured to be placed on a discharge table. A carrier includes an attracting actuator and a mobile actuator. The order management processor is configured to control the carrier and includes a storage configured to memorize a layout of the plurality of products in the workpiece. The plurality of products are associated with an attracting order.Type: ApplicationFiled: July 12, 2019Publication date: November 7, 2019Applicant: Yamazaki Mazak CorporationInventors: Yukio MORITA, Isao KUWAYAMA, Tetsu HATTORI, Yoshihiko SAKAI, Yoshihiro NAKAMURA
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Patent number: 10434823Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.Type: GrantFiled: April 27, 2016Date of Patent: October 8, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Hiroyuki Matsumoto, Shintaro Hatanaka
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Patent number: 10427459Abstract: To reduce noise while suppressing increase in rolling resistance, without affecting the formation of a carcass line, provided is a pneumatic tire 10 comprising an inner liner 17. The thickness of the inner liner 17 at least in part of a side portion 18 is 1.5 mm or more. When the tire 10 is mounted to a rim, and an internal pressure of 250 kPa or more is applied to the tire, in a case where a sectional width SW of the tire is less than 165 mm, a ratio of the sectional width SW to an outer diameter OD of the tire, SW/OD, is 0.26 or less; and in a case where the sectional width SW of the tire is 165 mm or more, the sectional width SW and the outer diameter OD of the tire satisfy a relation expression OD?2.135×SW+282.3.Type: GrantFiled: April 8, 2015Date of Patent: October 1, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Shintaro Hatanaka, Kentaro Kozuki
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Patent number: 10427458Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.Type: GrantFiled: April 27, 2016Date of Patent: October 1, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Hiroyuki Matsumoto, Shintaro Hatanaka
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Patent number: 10226966Abstract: The present invention provides: a pneumatic radial tire for a passenger car, the tire having cross sectional width SW and outer diameter OD satisfying a predetermined relationship formula when the tire is assembled with a rim and inflated at internal pressure of at least 250 kPa; a tire-rim assembly formed by assembling bead portions of said tire with the rim; and a method for using a tire, including preparing a pneumatic radial tire for a passenger car in which cross sectional width SW and outer diameter OD of the tire satisfy a predetermined relationship formula, and using the tire at internal pressure of at least 250 kPa.Type: GrantFiled: June 22, 2012Date of Patent: March 12, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Shintaro Hatanaka, Hiroyuki Matsumoto
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Patent number: 10214052Abstract: A run-flat tire of the present invention is a pneumatic radial tire for passenger vehicles which has a carcass composed of plies of radially arranged cords toroidally extending between a pair of bead portions, and the a W/L ratio of the section width W to the outer diameter L of the tire is 0.25 or less.Type: GrantFiled: March 22, 2011Date of Patent: February 26, 2019Assignee: BRIDGESTONE CORPORATIONInventor: Isao Kuwayama
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Patent number: 10207542Abstract: An object of the present invention is to adequately control relationship between a cross sectional width SW and an outer diameter OD of a pneumatic radial tire for a passenger vehicle. The tire is further characterized in that, provided that each half portion in the tire width direction of a ground contact surface of the tire is divided in the tire width direction into three equal portions including a tire-width-direction center portion, a tire-width-direction intermediate portion and a tire-width-direction outer portion from the tire-width-direction center side, rigidity in the tire circumferential direction of the belt reinforcing layer in a region in the tire width direction thereof corresponding to the tire-width-direction outer side portion is lower than rigidity in the tire circumferential direction of the belt reinforcing layer in a region in the tire width direction thereof corresponding to the tire-width-direction center portion.Type: GrantFiled: November 2, 2012Date of Patent: February 19, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Hiroyuki Matsumoto, Shintaro Hatanaka
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Patent number: 10207541Abstract: A pneumatic radial tire for a passenger vehicle according to the present invention has an appropriate relationship between a tire cross-sectional width SW and a tire outer diameter OD. Also, a method of using the pneumatic radial tire for a passenger vehicle according to the present invention is to use the above radial tire with at least specified internal pressure.Type: GrantFiled: August 24, 2012Date of Patent: February 19, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Hiroyuki Matsumoto, Shintaro Hatanaka
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Patent number: 10195899Abstract: Provided is a pneumatic radial tire for a passenger vehicle, having a carcass constituted of plies as radially-disposed cords and toroidally provided across a pair of bead portions, and including: a belt constituted of one or more belt layers; and a tread, which are disposed in this order on the outside in the radial direction of the carcass, in which: a section width SW and an outer diameter OD of the tire have a ratio of SW/OD?0.26 when SW<165 (mm), and SW and OD satisfy a relationship formula OD?2.035×SW+282.Type: GrantFiled: July 27, 2012Date of Patent: February 5, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Shintaro Hatanaka, Hiroyuki Matsumoto, Isao Kuwayama, Jun Watanabe, Shingo Hiura
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Patent number: 10189312Abstract: A pneumatic tire that makes steering stability, rolling resistance performance, and noise performance compatible includes a carcass toroidally extending between two bead portions; an inclined belt, with inclined belt layer(s) including cords that extend at an inclination relative to a tire circumferential direction, and a circumferential belt, with circumferential belt layer(s) including cords that extend along the tire circumferential direction, radially at an outer side of a crown portion of the carcass; and a tread at an outer side of the circumferential belt in the tire radial direction. An inclination angle of the cords in the inclined belt layers is 35° to 90°, the circumferential belt has a higher tire circumferential direction rigidity per unit width in a central region including a tire equator than in other regions, and in a surface region including the tire equator, the tread includes a land portion continuous in the tire circumferential direction.Type: GrantFiled: June 23, 2014Date of Patent: January 29, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Isao Kuwayama, Shintaro Hatanaka