Patents by Inventor Kenichi Uesaka
Kenichi Uesaka 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: 9845385Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.Type: GrantFiled: April 27, 2012Date of Patent: December 19, 2017Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Mabuchi, Tatsuhiro Tanaka, Kazuyuki Nishioka, Kenichi Uesaka
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Publication number: 20170225512Abstract: According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (CpH2p+1O)3—Si—(CH2)q—S—CO—CkH2k+1, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.Type: ApplicationFiled: November 6, 2015Publication date: August 10, 2017Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayuko YAMANA, Yuka YOKOYAMA, Masako NAKATANI, Takashi MIKI, Takuya HORIGUCHI, Yoichi MIZUNO, Takahiro KAWACHI, Noboru OKABE, Natsuki SUGIMOTO, Kenichi UESAKA, Tetsuya MAEKAWA, Yumi SUZUKI, Fumiya KATO
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Publication number: 20160264772Abstract: The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, 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 specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component.Type: ApplicationFiled: October 27, 2014Publication date: September 15, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki NISHIOKA, Kenichi UESAKA, Takahiro KAWACHI, Masako NAKATANI, Tatsuhiro TANAKA, Fumiya KATO
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Publication number: 20160118956Abstract: In a surface acoustic wave resonator, a first IDT electrode defining a first IDT and a second IDT electrode defining a second IDT are located on a first principal surface of a piezoelectric substrate. A direction of an electric field applied to the first IDT electrode and a direction of an electric field applied to the second IDT electrode are opposite to each other with respect to a direction of a projected axis resulting from projecting a c-axis of the piezoelectric substrate to the first principal surface of the piezoelectric substrate.Type: ApplicationFiled: December 31, 2015Publication date: April 28, 2016Inventors: Takashi KIHARA, Kenichi UESAKA, Ryo NAKAGAWA
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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
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Patent number: 9236850Abstract: A signal separation device is a duplexer in which a reception frequency band is located at higher frequencies than a transmission frequency band. A series arm of a ladder transmission filter includes a plurality of series arm resonators, and parallel arms respectively include parallel arm resonators. The parallel arm resonators include the parallel arm resonators having resonant frequencies lower than those of the series arm resonators and the parallel arm resonator that has a resonant frequency which is located within the reception frequency band and which is higher than the resonant frequency of the series arm resonators and that has a lower capacitance than the series arm resonators and the parallel arm resonators.Type: GrantFiled: March 18, 2014Date of Patent: January 12, 2016Assignee: Murata Manufacturing Co., Ltd.Inventor: Kenichi Uesaka
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Patent number: 9231557Abstract: A duplexer includes a transmitting filter including serial resonators and parallel resonators connected in a ladder configuration, and a receiving filter. A resonator of the serial resonators and the parallel resonators in the transmitting filter that is arranged closest to a common terminal of the transmitting filter and the transmitting filter includes a surface acoustic wave resonator, and at least one resonator excluding the resonator that is arranged closest to the common terminal includes a film bulk acoustic wave resonator.Type: GrantFiled: May 5, 2009Date of Patent: January 5, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Keiichi Umeda, Kenichi Uesaka, Takashi Miyake
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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
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Patent number: 9124243Abstract: A surface acoustic wave filter device uses a Rayleigh wave as a main mode, and includes a ladder type surface acoustic wave filter unit. A thickness of a dielectric layer in a surface acoustic wave resonator configuring a series arm resonator is different from thickness of a dielectric layer in a surface acoustic wave resonator configuring a parallel arm resonator. A propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the series arm resonator is different from a propagation orientation of a surface acoustic wave in the surface acoustic wave resonator configuring the parallel arm resonator.Type: GrantFiled: July 17, 2013Date of Patent: September 1, 2015Assignee: Murata Manufacturing Co., Ltd.Inventors: Daisuke Tamasaki, Kenichi Uesaka
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Patent number: 9012560Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a silane coupling agent, 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; an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component; and the silane coupling agent contains a mercapto group.Type: GrantFiled: March 22, 2012Date of Patent: April 21, 2015Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Tetsuya Kunisawa, Tsuyoshi Tsuchida, Kenichi Uesaka, Isamu Tsumori, Reika Otake, Noboru Okabe, Naoya Omura, Tatsuhiro Tanaka, Takafumi Taguchi, Kenya Watanabe, Toru Iizuka
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Patent number: 8846791Abstract: It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component that contains an epoxidized natural rubber; silica; and a silane coupling agent, wherein the amount of the epoxidized natural rubber in 100% by mass of the rubber component is 15% by mass or more, the silica has a CTAB specific surface area of 180 m2/g or more and a BET specific surface area of 185 m2/g or more, and the silane coupling agent contains a mercapto group.Type: GrantFiled: December 8, 2010Date of Patent: September 30, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Takayuki Hattori, Ai Matsuura, Michio Hirayama, Kenichi Uesaka
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Publication number: 20140228500Abstract: Provided are a rubber composition for a tire capable of improving fuel economy, wet grip performance, abrasion resistance, and processability, and a pneumatic tire including the composition. Included is a rubber composition for a tire including: a diene polymer; silica; and a compound of formula (I) below, the diene polymer being a modified diene polymer obtained by reacting components (A) and (B), the amount of the compound of formula (I) being 0.1-10 parts by mass per 100 parts by mass of the rubber component, the component (A) being an active alkali metal-terminated conjugated diene polymer obtained by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of a component (C), the component (B) being a modifying agent containing a functional group, and the component (C) being a chemical species obtained by reacting an organic alkali metal compound with a compound of formula (1) below.Type: ApplicationFiled: July 6, 2012Publication date: August 14, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Kenichi Uesaka
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Publication number: 20140206793Abstract: Provided are: a rubber composition that improves fuel economy, wet grip performance, and dry grip performance together while maintaining the balance between them; and a pneumatic tire whose component (particularly tread) includes the rubber composition. The invention relates to a rubber composition containing: a rubber component containing a copolymer; and a silica, wherein the copolymer is obtained by copolymerization of 1,3-butadiene, styrene, and a compound of formula (I) below, has an amino group at a first chain end and a functional group containing at least one atom selected from the group consisting of nitrogen, oxygen, and silicon at second chain end, and has a Mw of 1.0×105-2.5×106, and the silica has an average length W1 between branched particles Z-Z inclusive of the branched particles Zs of 30-400 nm, wherein the branched particles Zs are each adjacent to at least three particles; wherein R1 represents a C1-C10 hydrocarbon group.Type: ApplicationFiled: August 22, 2012Publication date: July 24, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Noboru Okabe, Kenichi Uesaka
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Publication number: 20140197903Abstract: A signal separation device is a duplexer in which a reception frequency band is located at higher frequencies than a transmission frequency band. A series arm of a ladder transmission filter includes a plurality of series arm resonators, and parallel arms respectively include parallel arm resonators. The parallel arm resonators include the parallel arm resonators having resonant frequencies lower than those of the series arm resonators and the parallel arm resonator that has a resonant frequency which is located within the reception frequency band and which is higher than the resonant frequency of the series arm resonators and that has a lower capacitance than the series arm resonators and the parallel arm resonators.Type: ApplicationFiled: March 18, 2014Publication date: July 17, 2014Applicant: Murata Manufacturing Co., Ltd.Inventor: Kenichi UESAKA
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Publication number: 20140187707Abstract: Provided are: a rubber composition that improves fuel economy and wet grip performance together while maintaining the balance between them; and a pneumatic tire whose component (in particular tread) includes the rubber composition. The invention relates to a rubber composition containing: a rubber component containing a copolymer; silica; and a diene rubber gel bearing a hydroxyl group, wherein the copolymer is obtained by copolymerization of 1,3-butadiene, styrene, and a compound represented by formula (I) below, has an amino group at a first chain end and a functional group containing at least one atom selected from the group consisting of nitrogen, oxygen, and silicon at a second chain end, and has a weight average molecular weight of 1.0×105-2.5×106, and the diene rubber gel has a Tg of ?40 to ?10° C.Type: ApplicationFiled: August 24, 2012Publication date: July 3, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Noboru Okabe, Kenichi Uesaka
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Patent number: 8686085Abstract: The present invention has its object to provide a rubber composition having excellent low-exothermic property and high strength together, and a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition which contains a rubber component and 10 to 150 parts by mass of silica per 100 parts by mass of the rubber component. The rubber component contains a butadiene rubber modified by a compound represented by the formula (1): wherein, R1, R2 and R3 are the same or different and independently 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 are the same or different and independently represent a hydrogen atom or an alkyl group; and n represents an integer.Type: GrantFiled: July 29, 2009Date of Patent: April 1, 2014Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kenichi Uesaka, Toshiro Matsuo
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Publication number: 20140027042Abstract: Provided is a method for manufacturing a pneumatic tire, including the steps of preparing a polymer layer stack formed of a first layer made of a styrene-isobutylene-styrene triblock copolymer and having a thickness of 0.05 mm to 0.6 mm and a second layer made of an epoxidized styrene-butadiene-styrene triblock copolymer and having a thickness of 0.01 mm to 0.3 mm, molding a raw tire with the polymer layer stack bonded to the inner side of the tire as an inner liner, arranging the raw tire in a mold and vulcanizing the tire under pressure from a bladder, and cooling a vulcanized tire at 50° C. to 120° C. for 10 seconds to 300 seconds.Type: ApplicationFiled: February 28, 2012Publication date: January 30, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kenichi Uesaka, Mutsuki Sugimoto
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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
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Publication number: 20140011910Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.Type: ApplicationFiled: April 27, 2012Publication date: January 9, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Mabuchi, Tatsuhiro Tanaka, Kazuyuki Nishioka, Kenichi Uesaka
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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