Patents by Inventor Yoji Imoto
Yoji Imoto 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).
-
Patent number: 10464300Abstract: In a method for manufacturing a pneumatic tire, molding of a green tire has an assembly step of bonding an inner liner and an unvulcanized rubber sheet with end portions thereof in a width direction being displaced from each other by 50 mm to 500 mm in the width direction to manufacture a laminate, cutting the laminate to have a constant length corresponding to a width of a drum to manufacture a cut sheet, and a joining step of winding the cut sheet on entire circumference of the drum such that a cut surface thereof extends in a circumferential direction of the drum and the inner liner is disposed on an inner surface side, and joining the end portions of the inner liner and joining the end portions of the unvulcanized rubber sheet such that positions of the joined end portions are displaced by a constant distance.Type: GrantFiled: July 29, 2016Date of Patent: November 5, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Mutsuki Sugimoto
-
Publication number: 20170341284Abstract: The present invention is a strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire. The strip is composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 0.1 part by mass to 50 parts by mass of an organic derivative of clay mineral relative to 100 parts by mass of a styrene-isobutylene-styrene triblock copolymer, and a second layer made of a thermoplastic elastomer composition containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer. The strip has a strip main body with a thickness of 0.05 mm to 1.0 mm and ear portions with a thickness thinner than the thickness of the strip main body and a width of 0.5 mm to 5.0 mm disposed on opposite sides thereof.Type: ApplicationFiled: August 11, 2017Publication date: November 30, 2017Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji IMOTO, Mutsuki SUGIMOTO
-
Patent number: 9790359Abstract: Provided are a tread rubber composition that can achieve a balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire including the composition.Type: GrantFiled: June 7, 2013Date of Patent: October 17, 2017Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Masato Kawase, Masako Nakatani, Ryuichi Tokimune, Akinori Nagae
-
Publication number: 20160368256Abstract: In a method for manufacturing a pneumatic tire, molding of a green tire has an assembly step of bonding an inner liner and an unvulcanized rubber sheet with end portions thereof in a width direction being displaced from each other by 50 mm to 500 mm in the width direction to manufacture a laminate, cutting the laminate to have a constant length corresponding to a width of a drum to manufacture a cut sheet, and a joining step of winding the cut sheet on entire circumference of the drum such that a cut surface thereof extends in a circumferential direction of the drum and the inner liner is disposed on an inner surface side, and joining the end portions of the inner liner and joining the end portions of the unvulcanized rubber sheet such that positions of the joined end portions are displaced by a constant distance.Type: ApplicationFiled: July 29, 2016Publication date: December 22, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji IMOTO, Mutsuki SUGIMOTO
-
Patent number: 9315647Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: March 23, 2012Date of Patent: April 19, 2016Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Kenichi Uesaka, Takafumi Taguchi, Naoya Omura, Tetsuya Kunisawa, Satomi Yamauchi
-
Patent number: 9181413Abstract: The invention provides a rubber composition that can enhance fuel economy, wet-grip performance, abrasion resistance, and handling stability in a balanced manner, and a pneumatic tire using this composition.Type: GrantFiled: April 17, 2012Date of Patent: November 10, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takafumi Taguchi, Kenichi Uesaka, Yoji Imoto, Satomi Yamauchi, Yoshihiro Kagawa
-
Publication number: 20150099823Abstract: Provided are a tread rubber composition that can achieve a balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire including the composition.Type: ApplicationFiled: June 7, 2013Publication date: April 9, 2015Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Masato Kawase, Masako Nakatani, Ryuichi Tokimune, Akinori Nagae
-
Publication number: 20140261976Abstract: In a method for manufacturing a pneumatic tire, molding of a green tire has an assembly step of bonding an inner liner and an unvulcanized rubber sheet with end portions thereof in a width direction being displaced from each other by 50 mm to 500 mm in the width direction to manufacture a laminate, cutting the laminate to have a constant length corresponding to a width of a drum to manufacture a cut sheet, and a joining step of winding the cut sheet on entire circumference of the drum such that a cut surface thereof extends in a circumferential direction of the drum and the inner liner is disposed on an inner surface side, and joining the end portions of the inner liner and joining the end portions of the unvulcanized rubber sheet such that positions of the joined end portions are displaced by a constant distance.Type: ApplicationFiled: July 27, 2012Publication date: September 18, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Mutsuki Sugimoto
-
Publication number: 20140190619Abstract: The present invention is a strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire. The strip is composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 0.1 part by mass to 50 parts by mass of an organic derivative of clay mineral relative to 100 parts by mass of a styrene-isobutylene-styrene triblock copolymer, and a second layer made of a thermoplastic elastomer composition containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer. The strip has a strip main body with a thickness of 0.05 mm to 1.0 mm and ear portions with a thickness thinner than the thickness of the strip main body and a width of 0.5 mm to 5.0 mm disposed on opposite sides thereof.Type: ApplicationFiled: July 9, 2012Publication date: July 10, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Mutsuki Sugimoto
-
Publication number: 20140018490Abstract: The invention provides a rubber composition that can enhance fuel economy, wet-grip performance, abrasion resistance, and handling stability in a balanced manner, and a pneumatic tire using this composition.Type: ApplicationFiled: April 17, 2012Publication date: January 16, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takafumi Taguchi, Kenichi Uesaka, Yoji Imoto, Satomi Yamauchi, Yoshihiro Kagawa
-
Publication number: 20140011939Abstract: The present invention provides a rubber composition capable of enhancing the fuel economy, wet-grip performance, abrasion resistance, handling stability, and processability in a balanced manner, and a pneumatic tire using this rubber composition.Type: ApplicationFiled: April 17, 2012Publication date: January 9, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Toru Iizuka, Kenichi Uesaka, Hiroshi Ito, Yoshihiro Kagawa, Yoji Imoto
-
Patent number: 8618198Abstract: A rubber composition for a sidewall reinforcing layer and a run-flat tire reduces heat build-up, enhances elongation at break at high temperature, and increases run-flat durability, while maintaining good rigidity. The composition contains a rubber component including tin-modified BR (a) and/or BR (b) modified by a compound of formula (1) wherein R1, R2, and R3 may be the same as or different from one another and each represent an alkyl group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group, or a derivative thereof; R4 and R5 may be the same as or different from each other and each represent a hydrogen atom or an alkyl group; and n denotes an integer; and an alkylphenol-sulfur chloride condensate, wherein an amount of the alkylphenol-sulfur chloride condensate is 3-10 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: April 20, 2012Date of Patent: December 31, 2013Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Yoji Imoto
-
Publication number: 20130310512Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: March 23, 2012Publication date: November 21, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yoji Imoto, Kenichi Uesaka, Takafumi Taguchi, Naoya Omura, Tetsuya Kunisawa, Satomi Yamauchi
-
Publication number: 20120283354Abstract: The present invention provides a tire rubber composition which has good silica dispersibility and improves in terms of the reinforcement, the abrasion resistance, the mechanical strength, the rolling resistance, the wet grip performance, and the handling stability on a dry road surface in a balanced manner; and provides a pneumatic tire produced using the tire rubber composition. The present invention relates to a tire rubber composition, comprising: a rubber component; a first silica; and a second silica, wherein the first silica has a CTAB specific surface area of 180 m2/g or more, a BET specific surface area of 185 m2/g or more, and an aggregate size of 45 nm or more, and the second silica has a CTAB specific surface area of 95 m2/g or less, and a BET specific surface area of 100 m2/g or less.Type: ApplicationFiled: January 12, 2011Publication date: November 8, 2012Inventors: Takayuki Hattori, Ai Matsuura, Yoji Imoto, Michio Hirayama, Kenichi Uesaka
-
Publication number: 20120267024Abstract: Provided are a rubber composition for a sidewall reinforcing layer and a run-flat tire that reduce heat build-up, enhance elongation at break at high temperature, and increase run-flat durability, while maintaining good rigidity. The composition contains a rubber component including tin-modified BR (a) and/or BR (b) modified by a compound of formula (1); and an alkylphenol-sulfur chloride condensate, wherein an amount of the alkylphenol-sulfur chloride condensate is 3-10 parts by mass per 100 parts by mass of the rubber component: wherein R1, R2, and R3 may be the same as or different from one another and each represent an alkyl group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group, or a derivative thereof; R4 and R5 may be the same as or different from each other and each represent a hydrogen atom or an alkyl group; and n denotes an integer.Type: ApplicationFiled: April 20, 2012Publication date: October 25, 2012Inventor: Yoji IMOTO
-
Publication number: 20110005655Abstract: A runflat tire improved in durability which and increased in running distance and velocity at the time of puncture is provided. A side portion reinforcing layer (11) for a runflat tire, the layer being made of a rubber composition prepared by blending 0.1 to 50 parts by mass of a reinforcing material of polyparaphenylene terephthalamide based on 100 parts by mass of a rubber component comprising 20 to 80% by mass of a natural rubber and/or a polyisoprene rubber and 80 to 20% by mass of a polybutadiene rubber, and a runflat tire using the same.Type: ApplicationFiled: December 18, 2008Publication date: January 13, 2011Inventor: Yoji Imoto
-
Publication number: 20100132866Abstract: The present invention aims to provide a rubber composition for a sidewall reinforcing layer or a sidewall, which has sufficient thermal conductivity and low heat build-up property as well as excellent rigidity and run-flat durability. The present invention also aims to provide a pneumatic tire such as a run-flat tire, which has a sidewall reinforcing layer or sidewall that is produced using the rubber composition. The present invention relates to a rubber composition for a sidewall reinforcing layer or a sidewall, which contains a diene rubber and a coal-pitch based carbon fiber.Type: ApplicationFiled: November 2, 2009Publication date: June 3, 2010Inventor: Yoji IMOTO
-
Publication number: 20090000721Abstract: There are provided a rubber composition for side walls containing 100 parts by mass of a first rubber component consisting of 30 to 70 mass % of natural rubber and 70 to 30 mass % of epoxidized natural rubber, 20 to 60 parts by mass of silica, and 3 to 60 parts by mass of a second rubber component consisting of liquid rubber, as well as a method of producing the same and a pneumatic tire provided with a side wall rubber consisting of the rubber composition. The rubber composition for side walls has a higher content of source materials deriving from non-petroleum resources, and has excellent durability and an anti-crack-growing property.Type: ApplicationFiled: June 18, 2008Publication date: January 1, 2009Inventors: Yoji Imoto, Kenichi Uesaka
-
Publication number: 20080314495Abstract: By a rubber composition for a side wall including a solid rubber component including a natural rubber component consisting of 30 to 70% mass of a natural rubber and 30 to 70% mass of a modified natural rubber, and 20 to 60 parts by mass of silica, and 3 to 60 parts by mass of a liquid rubber based on 100 parts by mass of the solid rubber component, as well as a pneumatic tire using the rubber composition, a rubber composition for a side wall in which properties desired in a rubber composition for a side wall such as heat resistance, flexing resistance and fatigue resistance are improved while a use amount of a raw material derived from a petroleum source is reduced, as well as a pneumatic tire using the rubber composition are provided.Type: ApplicationFiled: June 18, 2008Publication date: December 25, 2008Inventors: Kenichi Uesaka, Yoji Imoto