Patents by Inventor Souto Nakayama
Souto Nakayama 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: 11001104Abstract: A tire includes a carcass, side-reinforcing rubber, a belt layer, and a tread. The belt layer includes at least two layers and is provided at a tire radial direction outer side of the carcass, each layer including a cord inclined with respect to a tire circumferential direction such that the cords of the belt layers intersect each other. The tread is provided at the tire radial direction outer side of the belt layer. A tire cross-section height SH satisfies SH?145 mm, and a ground contact width TW of the tread and a maximum tire width direction width of the belt layer satisfies TW<B. Moreover, an angle ? formed between a tire outer face and the tire width direction at a position at 0.8SH toward the tire radial direction outer side of a bead base portion of either of the bead portions is no less than 60°.Type: GrantFiled: April 27, 2017Date of Patent: May 11, 2021Assignee: BRIDGESTONE CORPORATIONInventors: Gaku Ogawa, Souto Nakayama
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Publication number: 20190135052Abstract: A tire includes a carcass, side-reinforcing rubber, a belt layer, and a tread. The belt layer includes at least two layers and is provided at a tire radial direction outer side of the carcass, each layer including a cord inclined with respect to a tire circumferential direction such that the cords of the belt layers intersect each other. The tread is provided at the tire radial direction outer side of the belt layer. A tire cross-section height SH satisfies SH?145 mm, and a ground contact width TW of the tread and a maximum tire width direction width of the belt layer satisfies TW<B. Moreover, an angle ? formed between a tire outer face and the tire width direction at a position at 0.8 SH toward the tire radial direction outer side of a bead base portion of either of the bead portions is no less than 60°.Type: ApplicationFiled: April 27, 2017Publication date: May 9, 2019Applicant: BRIDGESTONE CORPORATIONInventors: Gaku OGAWA, Souto NAKAYAMA
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Patent number: 9493037Abstract: The present invention provides a pneumatic tire having a carcass as a skeleton extending in a toroidal shape over a pair of bead portions, a belt including at least one slant layer, and a tread, the belt and the tread being disposed on the outer side in the tire radial direction of a crown portion of the carcass in this order, characterized in that: a ratio BD/BW of radius difference BD between radius at the center portion and radius at an end portion in the tire widthwise direction of the outermost layer of the slant belt layer(s), to a width BW of the outermost layer, is in the range of 0.01 to 0.04 in a section of the tire in the widthwise direction in a state where the tire is assembled with an application rim. A pneumatic tire being excellent in wear resistance performance and having relatively low rolling resistance can be obtained accordingly.Type: GrantFiled: December 17, 2008Date of Patent: November 15, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Fumio Takahashi, Souto Nakayama
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Patent number: 9216614Abstract: It is an object of the present invention to provide a rim for a pneumatic tire that can suppress local deformation of the sidewall portion of a mounted tire and thus suppress the occurrence of damage to the sidewall portion. The rim for a pneumatic tire according to the present invention is provided with a pair of bead seat portions separated from each other in a rim width direction and a flange portion extending outwards in a rim radial direction from a rim width direction outer end of each bead seat portion. A rim radial direction outer end of the flange portion is recurved outwards in the rim width direction. A radius of curvature of a surface of the flange portion at a rim width direction outer end portion of the flange portion is at least 0.4 times and at most 1.0 times a radius of curvature of the surface of the flange portion at a rim width direction central portion of the flange portion.Type: GrantFiled: February 3, 2012Date of Patent: December 22, 2015Assignee: BRIDGESTONE CORPORATIONInventor: Souto Nakayama
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Patent number: 9027617Abstract: An object of the present invention is to provide a pneumatic tire of which rolling resistance is reduced without impairing wear resistance. Specifically, the pneumatic tire of the present invention comprises: a tread portion; a pair of side wall portions; a pair of bead portions; a carcass constituted of at least one carcass ply extending in a toroidal shape between bead cores in the respective bead portions; a belt disposed on the outer peripheral side of a crown region of the carcass and formed by at least one inclined belt layer made of cords extending to be inclined with respect to the equatorial plane of the tire; and a tread rubber disposed on the radially outer side of the belt, wherein a ratio of BD/BW satisfies the following formula: (0.062×tire aspect ratio?0.01)<BD/BW<(0.062×tire aspect ratio+0.Type: GrantFiled: April 22, 2010Date of Patent: May 12, 2015Assignee: Bridgestone CorporationInventor: Souto Nakayama
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Patent number: 8752601Abstract: In a cross section in a tire width direction when a tire is mounted on a prescribed rim (7), a belt has a flat shape in the tire width direction, the height (SWh) of the position where the tire width is the maximum is more than half the cross-sectional height (SH) of the tire, and a path length (CSR1) of the carcass from an intersection (I1) to an intersection (I2), is longer than a path length (CSR2) of the carcass from the intersection (I1) to an intersection (I3).Type: GrantFiled: April 14, 2010Date of Patent: June 17, 2014Assignee: Bridgestone CorporationInventors: Fumio Takahashi, Souto Nakayama
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Publication number: 20130270892Abstract: It is an object of the present invention to provide a rim for a pneumatic tire that can suppress local deformation of the sidewall portion of a mounted tire and thus suppress the occurrence of damage to the sidewall portion. The rim for a pneumatic tire according to the present invention is provided with a pair of bead seat portions separated from each other in a rim width direction and a flange portion extending outwards in a rim radial direction from a rim width direction outer end of each bead seat portion. A rim radial direction outer end of the flange portion is recurved outwards in the rim width direction. A radius of curvature of a surface of the flange portion at a rim width direction outer end portion of the flange portion is at least 0.4 times and at most 1.0 times a radius of curvature of the surface of the flange portion at a rim width direction central portion of the flange portion.Type: ApplicationFiled: February 3, 2012Publication date: October 17, 2013Applicant: BRIDGESTONE CORPORATIONInventor: Souto Nakayama
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Publication number: 20120055604Abstract: An object of the present invention is to provide a pneumatic tire of which rolling resistance is reduced without impairing wear resistance. Specifically, the pneumatic tire of the present invention comprises: a tread portion; a pair of side wall portions; a pair of bead portions; a carcass constituted of at least one carcass ply extending in a toroidal shape between bead cores in the respective bead portions; a belt disposed on the outer peripheral side of a crown region of the carcass and formed by at least one inclined belt layer made of cords extending to be inclined with respect to the equatorial plane of the tire; and a tread rubber disposed on the radially outer side of the belt, wherein a ratio of BD/BW satisfies the following formula: (0.062×tire aspect ratio?0.01)<BD/BW<(0.062×tire aspect ratio+0.Type: ApplicationFiled: April 22, 2010Publication date: March 8, 2012Applicant: BRIDGESTONE CORPORATIONInventor: Souto Nakayama
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Publication number: 20120018071Abstract: Provided is a pneumatic tire having a high partial wear resistance and a low rolling resistance.Type: ApplicationFiled: April 14, 2010Publication date: January 26, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Fumio Takahashi, Souto Nakayama
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Publication number: 20110114238Abstract: The present invention provides a pneumatic tire having a carcass as a skeleton extending in a toroidal shape over a pair of bead portions, a belt including at least one slant layer, and a tread, the belt and the tread being disposed on the outer side in the tire radial direction of a crown portion of the carcass in this order, characterized in that: a ratio BD/BW of radius difference BD between radius at the center portion and radius at an end portion in the tire widthwise direction of the outermost layer of the slant belt layer(s), to a width BW of the outermost layer, is in the range of 0.01 to 0.04 in a section of the tire in the widthwise direction in a state where the tire is assembled with an application rim. A pneumatic tire being excellent in wear resistance performance and having relatively low rolling resistance can be obtained accordingly.Type: ApplicationFiled: December 17, 2008Publication date: May 19, 2011Applicant: BRIDGESTONE CORPORATIONInventors: Fumio Takahashi, Souto Nakayama