Patents by Inventor Keiichi Nakadera
Keiichi Nakadera 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: 20200114704Abstract: A pneumatic tire 1 includes a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside the tread portion 2. The pneumatic tire 1 has a noise damper 20 arranged on an inner cavity surface of the tread portion 2. Glass transition temperature of the noise damper 20 is in a range of from ?55 degrees Celsius to ?45 degrees Celsius.Type: ApplicationFiled: December 11, 2019Publication date: April 16, 2020Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Keiichi NAKADERA, Hiroshi ITO, Shuichiro ONO, Daiki MUKOUGUCHI, Tatsuhiro TANAKA, Tetsuya MAEKAWA, Subaru TOYA
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Publication number: 20190375250Abstract: A pneumatic tire 1 includes a carcass 6 extending between bead cores of bead portions via a tread portion 2 and sidewall portions, and a belt layer 7 arranged on an outer side in a tire radial direction of the carcass 6 and inside the tread portion 2. The pneumatic tire 1 has a noise damper 20 arranged on an inner cavity surface of the tread portion 2. Glass transition temperature of the noise damper 20 is in a range of from ?55 degrees Celsius to ?45 degrees Celsius.Type: ApplicationFiled: December 12, 2017Publication date: December 12, 2019Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Masako NAKATANI, Takahiro KAWACHI, Ayuko YAMADA, Keiichi NAKADERA, Hiroshi ITO, Shuichiro ONO, Daiki MUKOUGUCHI, Tatsuhiro TANAKA, Tetsuya MAEKAWA, Subaru TOYA
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Patent number: 8869856Abstract: A pneumatic tire capable of reducing rolling resistance and discharging static electricity generated during running, wherein each of a tread rubber, a breaker rubber, and a sidewall rubber formed on the tread part, the breaker part, and the sidewall part, respectively, has a volume specific resistivity of 1×108 ?·cm or more, the pneumatic tire further including a conduction rubber embedded in the tread part so as to be at least partially exposed to a surface of the tread part, bead part rubber disposed at a region contacting a rim flange of the bead part, and electroconductive rubber electrically connecting the conduction rubber to the beat part rubber, wherein each of the conduction rubber, the bead part rubber, and the electroconductive rubber has a volume specific resistivity of less than 108 ?·cm.Type: GrantFiled: June 2, 2008Date of Patent: October 28, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Tetsuya Kunisawa, Keiichi Nakadera, Toru Iizuka, Takao Wada, Shinichi Miyazaki, Toshiro Matsuo
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Publication number: 20140299241Abstract: A pneumatic tire capable of reducing rolling resistance and discharging static electricity generated during running, wherein each of a tread rubber, a breaker rubber, and a sidewall, respectively, has a volume specific resistivity of 1×108 ?·cm or more, the pneumatic tire further including a conduction rubber embedded in the tread part so as to be at least partially exposed to a surface of the tread part, a coating rubber disposed on the upper part of the breaker part, a bead part rubber, and side part electroconductive rubber electrically connecting the conduction rubber to the beat part rubber, wherein each of the conduction rubber, the bead part rubber, the coating rubber and the side part electroconductive rubber has a volume specific resistivity of less than 108 ?·cm.Type: ApplicationFiled: June 19, 2014Publication date: October 9, 2014Inventors: Tetsuya KUNISAWA, Keiichi NAKADERA
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Patent number: 8597561Abstract: An object of the present invention is to provide a method for producing a pneumatic tire, that does not cause an air-in phenomenon between an inner liner and an insulation or carcass by preventing adhesion of an inner liner to a bladder. The method for producing a pneumatic tire according to the present invention includes the following steps. A green tire using, as an inner liner, a polymer composition in which a polymer component contains 100 to 60% by mass of a styrene-isobutylene-styrene triblock copolymer and 0 to 40% by mass of a polyamide-based polymer that contains polyamide in the molecular chain and has a Shore D hardness of 70 or less is prepared. The green tire is mounted in a mold and vulcanized while being pressurized by a bladder. The resultant vulcanized tire is cooled at 10 to 120° C. for 10 to 300 seconds.Type: GrantFiled: September 1, 2010Date of Patent: December 3, 2013Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Mutsuki Sugimoto, Keiichi Nakadera
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Publication number: 20110068508Abstract: An object of the present invention is to provide a method for producing a pneumatic tire, that does not cause an air-in phenomenon between an inner liner and an insulation or carcass by preventing adhesion of an inner liner to a bladder. The method for producing a pneumatic tire according to the present invention includes the following steps. A green tire using, as an inner liner, a polymer composition in which a polymer component contains 100 to 60% by mass of a styrene-isobutylene-styrene triblock copolymer and 0 to 40% by mass of a polyamide-based polymer that contains polyamide in the molecular chain and has a Shore D hardness of 70 or less is prepared. The green tire is mounted in a mold and vulcanized while being pressurized by a bladder. The resultant vulcanized tire is cooled at 10 to 120° C. for 10 to 300 seconds.Type: ApplicationFiled: September 1, 2010Publication date: March 24, 2011Inventors: Mutsuki SUGIMOTO, Keiichi Nakadera
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Publication number: 20110011511Abstract: To provide a polymer composition that is good in durability and anti-air permeability, and has a superior adhesive property to adjacent rubber and processability. A polymer mixture containing a styrene-isobutylene-styrene triblock copolymer in a range from 99 to 60% by mass and a polyamide-based polymer in a range from 1 to 40% by mass that contains polyamide in the molecular chain thereof and has a Shore D hardness of 70 or less, a polymer composition containing the polymer mixture, and the polymer composition are used as some members of a tire.Type: ApplicationFiled: February 25, 2009Publication date: January 20, 2011Inventors: Tatsuya Miyazaki, Keiichi Nakadera
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Patent number: 7681613Abstract: A pneumatic tire and noise damper assembly comprises a pneumatic tire manufactured by vulcanization using an expandable bladder for molding an inner surface of the tire, the bladder with at least one vent groove extending on its outer surface, the inner surface of the tire being provided with at least one projecting stripe molded by the vent groove of the bladder, and a noise damper being attached to the inner surface of the tire and extending in the circumferential direction of the tire, wherein the projecting stripe comprises at least one first projecting stripe extending in an adhesion region to which the noise damper is attached, and the first projecting part has a height of from 0.2 to 1.0 mm, a width of from 0.4 to 1.6 mm and an virtual section area of from 0.08 to 1.00 mm2.Type: GrantFiled: December 4, 2006Date of Patent: March 23, 2010Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Naoki Yukawa, Keiichi Nakadera
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Publication number: 20080308203Abstract: A pneumatic tire capable of reducing rolling resistance and discharging static electricity generated during running, wherein each of a tread rubber, a breaker rubber, and a sidewall rubber formed on the tread part, the breaker part, and the sidewall part, respectively, has a volume specific resistivity of 1×108 ?·cm or more, the pneumatic tire further including a conduction rubber embedded in the tread part so as to be at least partially exposed to a surface of the tread part, bead part rubber disposed at a region contacting a rim flange of the bead part, and electroconductive rubber electrically connecting the conduction rubber to the beat part rubber, wherein each of the conduction rubber, the bead part rubber, and the electroconductive rubber has a volume specific resistivity of less than 108 ?·cm.Type: ApplicationFiled: June 2, 2008Publication date: December 18, 2008Inventors: Tetsuya Kunisawa, Keiichi Nakadera, Toru Iizuka, Takao Wada, Shinichi Miyazaki, Toshiro Matsuo
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Publication number: 20070131326Abstract: A pneumatic tire and noise damper assembly comprises a pneumatic tire manufactured by vulcanization using an expandable bladder for molding an inner surface of the tire, the bladder with at least one vent groove extending on its outer surface, the inner surface of the tire being provided with at least one projecting stripe molded by the vent groove of the bladder, and a noise damper being attached to the inner surface of the tire and extending in the circumferential direction of the tire, wherein the projecting stripe comprises at least one first projecting stripe extending in an adhesion region to which the noise damper is attached, and the first projecting part has a height of from 0.2 to 1.0 mm, a width of from 0.4 to 1.6 mm and an virtual section area of from 0.08 to 1.00 mm2.Type: ApplicationFiled: December 4, 2006Publication date: June 14, 2007Inventors: Naoki Yukawa, Keiichi Nakadera