Patents by Inventor Naohiko Kikuchi
Naohiko Kikuchi 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: 20100056684Abstract: The present invention has its object to provide a rubber composition for a studless tire that contributes to both good braking force and high handling stability on ice or snow, and a high performance studless tire using the rubber composition. The rubber composition for the studless tire contains: a mixture of a zinc salt of an aliphatic carboxylic acid and a zinc salt of an aromatic carboxylic acid; an oil or a plasticizer; and a rubber component that comprises 40% by mass or more of a butadiene rubber relative to 100% by mass of a total amount of the rubber component.Type: ApplicationFiled: June 15, 2009Publication date: March 4, 2010Inventors: Takayuki HATTORI, Ryoji Kojima, Naohiko Kikuchi
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Patent number: 7513281Abstract: A method of manufacturing a pneumatic tire comprises assembling unvulcanized rubber components to make a green tire, vulcanizing the green tire, and winding an unvulcanized rubber tape so that the windings collectively have a predetermined cross sectional shape for at least one of the unvulcanized rubber components to thereby make said at least one of the unvulcanized rubber components.Type: GrantFiled: February 23, 2005Date of Patent: April 7, 2009Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Ikuji Ikeda, Yoshikazu Tanaka, Naohiko Kikuchi
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Publication number: 20090020203Abstract: The present invention provides a run-flat tire that can improve both of ride quality and run-flat performance. The run-flat tire of the present invention comprises a sidewall-reinforcing layer prepared by using a rubber composition comprising non-metallic short fibers having an average fiber diameter of 1 to 100 ?m and an average fiber length of 0.1 to 20 mm in an amount of 5 to 120 parts by weight on the basis of 100 parts by weight of a diene rubber, the non-metallic short fibers being oriented in the circumferential direction of the tire.Type: ApplicationFiled: April 25, 2007Publication date: January 22, 2009Inventors: Naohiko Kikuchi, Kazuo Hochi
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Publication number: 20090018272Abstract: The object of the present invention is to provide a rubber composition suitable for a studless tire, which can inhibit rubber hardness increase with time and reveals excellent performance on ice and snow for a long time. The present invention relates to a rubber composition comprising 1 to 60 parts by weight of hydrogenised liquid polybutadiene based on 100 parts by weight of a rubber component containing at least 80% by weight of a natural rubber and a butadiene rubber, wherein a peak temperature of tan ? is at most 45° C. and rubber hardness at 0° C. is at most 64.Type: ApplicationFiled: July 11, 2008Publication date: January 15, 2009Inventors: Takayuki Hattori, Naohiko Kikuchi, Ryoji Kojima
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Publication number: 20080308207Abstract: The invention provides a rubber composition for forming a clinch of a tire, containing a rubber component containing at least one of a natural rubber and an epoxidized natural rubber, and not less than 30 parts by mass of silica and not less than 0.1 part by mass to not more than 10 parts by mass of a quinone diimine compound to 100 parts by mass of the rubber component, and a clinch and a tire formed using the rubber composition.Type: ApplicationFiled: June 9, 2008Publication date: December 18, 2008Inventors: Naohiko Kikuchi, Toru Iizuka
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Patent number: 7432318Abstract: The present invention provides a tread rubber composition for a tire, which highly controls energy loss in a wide frequency range and has high frictional force especially on wet road surfaces, and a tire using the same. Specifically, the present invention provides a rubber composition for a tire comprising 5 to 100 parts by weight of a fatty acid obtained from a vegetable oil having an iodine value of at least 80, based on 100 parts by weight of a rubber component, wherein the ratio of tan? at 60° C. to tan? at 0° C. is at least 0.85, and a pneumatic tire using the rubber composition.Type: GrantFiled: December 15, 2004Date of Patent: October 7, 2008Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Naohiko Kikuchi
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Patent number: 7307116Abstract: To provide a rubber composition for breaker having balanced properties among rigidity, heat resistance, adhesiveness, humid aging adhesion and elongation, and a pneumatic tire having a breaker layer or a belt layer comprising the rubber composition. A rubber composition for breaker comprises 55 to 65 parts by weight of carbon black, 5 to 15 parts by weight of silica, 3.5 to 4.5 parts by weight of sulfur, at least 0.08 part by weight of cobalt, a resorcinol resin and a methylene donor based on 100 parts by weight of a rubber component containing a natural rubber and/or an isoprene rubber as a main component.Type: GrantFiled: May 21, 2002Date of Patent: December 11, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Yoichi Mizuno, Masato Kawase, Mamoru Uchida, Naohiko Kikuchi
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Publication number: 20070240610Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire has a non-petroleum raw material in an amount of at least 75 % by weight based on the total weight of the tire.Type: ApplicationFiled: June 20, 2007Publication date: October 18, 2007Inventors: Naohiko Kikuchi, Kazuo Hochi, Takuya Horiguchi
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Patent number: 7275572Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire comprises a non-petroleum raw material in an amount of at least 75% by weight based on the total weight of the tire.Type: GrantFiled: June 13, 2005Date of Patent: October 2, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Naohiko Kikuchi, Kazuo Hochi, Takuya Horiguchi
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Patent number: 7247663Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire comprises a non-petroleum raw material in an amount of at least 75% by weight based on the total weight of the tire.Type: GrantFiled: August 23, 2002Date of Patent: July 24, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Naohiko Kikuchi, Kazuo Hochi, Takuya Horiguchi
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Patent number: 7211612Abstract: A tread rubber composition improved both in grip performance on ice-covered and snow-covered road surfaces and in abrasion resistance is provided. The tread rubber composition contains aluminum hydroxide having an untamped density of not more than 0.60 g/cm3, a DOP oil absorption of at least 70 cm3/100 g and less than 250 cm3/100 g, and a BET specific surface area of at least 30 m2/g and not more than 350 m2/g in an amount of 5–60 parts by weight with respect to 100 parts by weight of a rubber component containing at least 50% by weight of at least one of polyisoprene rubber and polybutadiene rubber. The tread rubber composition has a tan? peak temperature of not more than ?45° C. and a type A durometer hardness at 0° C. of not more than 64.Type: GrantFiled: February 26, 2003Date of Patent: May 1, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Naohiko Kikuchi
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Patent number: 7165585Abstract: The present invention aims to provide a lightweight tire without decreasing durability and to reduce rolling resistance and improve steering stability of the tire. Specifically, the present invention relates to a rubber composition for a tire comprising 20 to 120 parts by weight of an inorganic filler, and 5 to 70 parts by weight of polyethylene powder, based on 100 parts by weight of diene rubber, the tire being prepared by kneading at 140° C. at most. The particle size of the polyethylene powder is preferably at most 500 ?m.Type: GrantFiled: March 30, 2004Date of Patent: January 23, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Tetsuya Kunisawa, Naohiko Kikuchi
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Patent number: 7122090Abstract: The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25° C. the tread has a complex elastic modulus E1 in the tread thickness direction, and the sheet has a complex elastic modulus E? in the extrusion direction and a complex elastic modulus E? in a 90° direction from the extrusion direction, when the rubber composition is made into 2 mm sheets with a roller and these moduli fulfill the following equation, 60?(E1?E?)/(E??E?)×100?100 and the tread has a specific tread rubber hardness.Type: GrantFiled: June 27, 2003Date of Patent: October 17, 2006Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Isamu Tsumori, Akira Minakoshi, Naohiko Kikuchi, Yoshikazu Tanaka, Takuzo Iwata, Norio Taniguchi
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Patent number: 7119147Abstract: A rubber composition which prevents the rise in rubber hardness over time and can maintain good performance on snow and ice over a long period, which includes (A) a diene rubber containing, as a main component, at least one member selected from the group consisting of natural rubber and butadiene rubber, and (B) 5 to 60 parts by weight of vegetable oil which has an iodine value of at least 80 and contains at least 70% by weight of unsaturated fatty acid having at least 18 carbon atoms, based on 100 parts by weight of the diene rubber (A), the rubber composition having a tan ? peak temperature Tg of at most ?50° C. and a rubber hardness of at most 64 at 0° C. The present invention also relates to a pneumatic tire using the rubber composition as the tread.Type: GrantFiled: January 14, 2003Date of Patent: October 10, 2006Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Naohiko Kikuchi
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Patent number: 7060146Abstract: A method of manufacturing a pneumatic tire comprises assembling unvulcanized rubber components to make a green tire, vulcanizing the green tire, and winding an unvulcanized rubber tape so that the windings collectively have a predetermined cross sectional shape for at least one of the unvulcanized rubber components to thereby make said at least one of the unvulcanized rubber components.Type: GrantFiled: October 30, 2001Date of Patent: June 13, 2006Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Ikuji Ikeda, Yoshikazu Tanaka, Naohiko Kikuchi
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Patent number: 7044181Abstract: There is provided a studless tire that is excellent especially in performance on a snow or ice road. A studless tire, wherein non-metal staple fibers having an average fiber diameter of 1 to 100 ?m and an average length of 0.1 to 5 mm are dispersed in a diene rubber in such a way that the non-metal staple fibers are oriented in a thickness direction of a tread, a complex elastic modulus E1 in the thickness direction of the tread and an elastic module E2 in a circumferential direction of the tire measured at 25° C. satisfy the equation 1.1?E1/E2?4, and hardness of the tread rubber measured at ?10° C. is 45 to 75 degrees.Type: GrantFiled: July 27, 2000Date of Patent: May 16, 2006Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Mamoru Uchida, Naohiko Kikuchi, Narihiro Tahara, Takeshi Ohta
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Publication number: 20050236084Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire comprises a non-petroleum raw material in an amount of at least 75% by weight based on the total weight of the tire.Type: ApplicationFiled: June 13, 2005Publication date: October 27, 2005Inventors: Naohiko Kikuchi, Kazuo Hochi, Takuya Horiguchi
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Publication number: 20050171260Abstract: The present invention provides a tread rubber composition for a tire, which highly controls energy loss in a wide frequency range and has high frictional force especially on wet road surfaces, and a tire using the same. Specifically, the present invention provides a rubber composition for a tire comprising 5 to 100 parts by weight of a fatty acid obtained from a vegetable oil having an iodine value of at least 80, based on 100 parts by weight of a rubber component, wherein the ratio of tan? at 60° C. to tan? at 0° C. is at least 0.85, and a pneumatic tire using the rubber composition.Type: ApplicationFiled: December 15, 2004Publication date: August 4, 2005Inventor: Naohiko Kikuchi
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Publication number: 20050145314Abstract: A method of manufacturing a pneumatic tire comprises assembling unvulcanized rubber components to make a green tire, vulcanizing the green tire, and winding an unvulcanized rubber tape so that the windings collectively have a predetermined cross sectional shape for at least one of the unvulcanized rubber components to thereby make said at least one of the unvulcanized rubber components.Type: ApplicationFiled: February 23, 2005Publication date: July 7, 2005Applicant: Sumitomo Rubber Industries, Inc.Inventors: Ikuji Ikeda, Yoshikazu Tanaka, Naohiko Kikuchi
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Publication number: 20040211111Abstract: The present invention provide a rubber composition which prevents the rise in rubber hardness over time and can maintain good performance on snow and ice over a long period. The rubber composition comprises (A) a diene rubber containing, as a main component, at least one member selected from the group consisting of natural rubber and butadiene rubber, and (B) 5 to 60 parts by weight of vegetable oil which has an iodine value of at least 80 and contains at least 70% by weight of unsaturated fatty acid having at least 18 carbon atoms, based on 100 parts by weight of the diene rubber (A), the rubber composition having a tan &dgr; peak temperature Tg of at most −50° C. and a rubber hardness of at most 64 at 0° C. The present invention also relates to a pneumatic tire using the rubber composition as the tread.Type: ApplicationFiled: January 14, 2003Publication date: October 28, 2004Inventor: Naohiko Kikuchi