Patents by Inventor Takato Nakamura
Takato Nakamura 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: 10138925Abstract: An FRP drive shaft includes an end joint joined to at least one end of an FRP cylinder via an outer collar. The end joint includes a serrated portion on an outer periphery thereof. The outer collar includes a small-diameter collar portion and a large-diameter collar portion. The serrated portion is press-fitted into an inner periphery of the FRP cylinder and fixed to an inner periphery of the small-diameter collar portion. A gap between an inner periphery of the large-diameter collar portion and an outer periphery of the FRP cylinder is filled with an adhesive for fixing the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder to each other. An adhesive-accumulating space which partially increases a filling amount of the adhesive is formed between the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder.Type: GrantFiled: March 6, 2015Date of Patent: November 27, 2018Assignees: FUJIKURA RUBBER LTD., HONDA MOTOR CO., LTD.Inventors: Takato Nakamura, Masako Okochi, Naoki Kimoto, Tsuyoshi Matsuda, Yuji Katayama, Michihiro Komatsu
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Publication number: 20170152884Abstract: An FRP drive shaft includes an end joint joined to at least one end of an FRP cylinder via an outer collar. The end joint includes a serrated portion on an outer periphery thereof. The outer collar includes a small-diameter collar portion and a large-diameter collar portion. The serrated portion is press-fitted into an inner periphery of the FRP cylinder and fixed to an inner periphery of the small-diameter collar portion. A gap between an inner periphery of the large-diameter collar portion and an outer periphery of the FRP cylinder is filled with an adhesive for fixing the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder to each other. An adhesive-accumulating space which partially increases a filling amount of the adhesive is formed between the inner periphery of the large-diameter collar portion and the outer periphery of the FRP cylinder.Type: ApplicationFiled: March 6, 2015Publication date: June 1, 2017Inventors: Takato Nakamura, Masako Okochi, Naoki Kimoto, Tsuyoshi Matsuda, Yuji Katayama, Michihiro Komatsu
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Patent number: 8882950Abstract: A prepreg winding method includes the steps of preparing a plate, a mandrel movable toward and away from the plate, and a press roll movable toward and away from the mandrel and having an axis parallel to the mandrel; mounting a prepreg on the plate, the prepreg being formed by impregnating reinforced fibers with a thermosetting resin sheet; winding a leading end of the prepreg mounted on the plate around the mandrel, and making a pressing force act on the plate and the mandrel therebetween with the prepreg sandwiched between the plate and the mandrel and making a pressing force act on the mandrel and the press roll therebetween with the prepreg sandwiched between the mandrel and the press roll; and winding the prepreg around the mandrel by rotating the mandrel and the press roll.Type: GrantFiled: May 28, 2010Date of Patent: November 11, 2014Assignee: Fujikura Rubber Ltd.Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
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Patent number: 8883060Abstract: A method is provided for producing a weight-reduced FRP cylinder which can attain high strength, and also such an FRP cylinder is provided. This FRP cylinder producing method, in which a plurality of prepregs formed by impregnating reinforced fibers with thermosetting resin sheets are wound into a cylinder and thermally cured to be formed as a plurality of FRP layers, includes a simultaneous multilayer winding process in which a torsional rigidity retaining prepreg and a buckling prevention prepreg are continuously wound a plurality of turns with being layered on each other when the plurality of prepregs are wound into a cylinder, wherein the torsional rigidity retaining prepreg includes a layer of fibers oblique to a cylindrical axis direction of the FRP cylinder, and wherein the buckling prevention prepreg includes a layer of fibers orthogonal to the cylindrical axis direction.Type: GrantFiled: January 14, 2010Date of Patent: November 11, 2014Assignee: Fujikura Rubber Ltd.Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
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Patent number: 8876614Abstract: An FRP drive shaft is formed by joining metal end-joints to each end of an FRP cylinder, wherein each of the metal end-joints includes a press-fitting joint having a serrated portion which is press-fitted into the FRP cylinder, and a cylindrical outer collar which is fixed to an outer periphery of the FRP cylinder, and non-circular engaging portions which are engaged with each other to transfer rotation are formed on the press-fitting joint and the cylindrical outer collar, respectively.Type: GrantFiled: May 28, 2010Date of Patent: November 4, 2014Assignee: Fujikura Rubber Ltd.Inventors: Takato Nakamura, Naoki Kimoto
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Patent number: 8852021Abstract: A golf club shaft in which the isotropy of the prepregs configuring a torsion rigidity holding layer is high and in which sufficient torsional rigidity can be secured with fewer plies of fewer prepregs. The golf club shaft includes a torsional rigidity holding layer made of a thermosetting resin which contains reinforced fibers extending obliquely to a longitudinal direction of the shaft. The torsional rigidity holding layer includes a multilayer set prepreg, in which at least two layers of prepregs made of reinforced fibers are impregnated with a thermosetting resin. A plurality of prepregs in the multilayer set prepreg include reinforced fibers extending in mutually different directions. The multilayer set prepreg is continuously wound by at least two turns with the plurality of prepregs layered on each other. A golf club uses the shaft.Type: GrantFiled: December 3, 2010Date of Patent: October 7, 2014Assignee: Fujikura Rubber Ltd.Inventors: Norio Matsumoto, Takato Nakamura, Masaki Wakabayashi, Tomonobu Kanno
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Patent number: 8770942Abstract: A scratch-resistant blade such as an FRP wind turbine blade and a blade protective sheet which can be easily repaired when scratched. A blade is provided with a laminated protective sheet bonded to at least part of a leading edge of an FRP blade body of said blade, wherein the laminated protective sheet comprises an adhesive layer, a intermediate fabric layer and a durable surface layer, in that order from the blade body.Type: GrantFiled: January 25, 2012Date of Patent: July 8, 2014Assignee: Fujikura Rubber LtdInventors: Hitoshi Saitou, Takato Nakamura, Nobuaki Suzuki
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Patent number: 8541615Abstract: Disclosed is a method for producing a biphenyltetracarboxylic acid ester by oxidative coupling a phthalic acid ester by using a catalyst comprising at least a palladium salt, a copper salt and a ?-dicarbonyl compound in the presence of a molecular oxygen, wherein the ?-dicarbonyl compound is supplied into a reaction mixture liquid intermittently at an interval of less than 30 minutes, or continuously. This method allows, in particular, the selective and economical production of an asymmetric biphenyltetracarboxylic acid tetraester such as 2,3,3?,4?-biphenyltetracarboxylic acid tetraester.Type: GrantFiled: August 6, 2009Date of Patent: September 24, 2013Assignee: Ube Industries, Ltd.Inventors: Masayuki Nishio, Hiroaki Imajima, Takato Nakamura, Yoshihiro Yamauchi
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Publication number: 20130101426Abstract: A scratch-resistant blade such as an FRP wind turbine blade and a blade protective sheet which can be easily repaired when scratched. A blade is provided with a laminated protective sheet bonded to at least part of a leading edge of an FRP blade body of said blade, wherein the laminated protective sheet comprises an adhesive layer, a intermediate fabric layer and a durable surface layer, in that order from the blade body.Type: ApplicationFiled: January 25, 2012Publication date: April 25, 2013Applicant: FUJIKURA RUBBER LTDInventors: Hitoshi Saitou, Takato Nakamura, Nobuaki Suzuki
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Patent number: 8337952Abstract: An object of the present invention is to provide a single-phase film of a metal sulfide with good quality, and a method for preparing a metal sulfide film at a low cost in a convenient manner. The present invention provides a preparation method of a metal sulfide film, comprising the steps of providing metal halide, such as iron halide (FeCl3, FeI3, FeBr3, FeCl2, FeI2 and FeBr2), as a first raw material and a thioamide compound, such as thioacetamide, as a second raw material, preferably vaporizing these raw materials and reacting them at atmospheric pressure; and a metal sulfide film prepared by this method.Type: GrantFiled: August 27, 2003Date of Patent: December 25, 2012Assignee: Suzuki Motor CorporationInventors: Tadashi Takahashi, Naoyuki Takahashi, Takato Nakamura
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Publication number: 20120295735Abstract: A golf club shaft and a golf club using such a golf club shaft are achieved in which the isotropy of the prepregs configuring a torsion rigidity holding layer is high and in which sufficient torsional rigidity can be secured with a lesser number of plies of prepregs. The golf club shaft is characterized by a torsional rigidity holding layer made of a thermosetting resin which contains reinforced fibers extending obliquely to a longitudinal direction of the shaft. The torsional rigidity holding layer includes a multilayer set prepreg, in which at least two layers of prepregs made of reinforced fibers are impregnated with a thermosetting resin. A plurality of prepregs in the multilayer set prepreg include reinforced fibers extending in mutually different directions; and the multilayer set prepreg is continuously wound by at least two turns with the plurality of prepregs layered on each other.Type: ApplicationFiled: December 3, 2010Publication date: November 22, 2012Applicant: Fujikura Rubber Ltd.Inventors: Norio Matsumoto, Takato Nakamura, Masaki Wakabayashi, Tomonobu Kanno
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Publication number: 20120247652Abstract: A prepreg winding method includes the steps of preparing a plate, a mandrel movable toward and away from the plate, and a press roll movable toward and away from the mandrel and having an axis parallel to the mandrel; mounting a prepreg on the plate, the prepreg being formed by impregnating reinforced fibers with a thermosetting resin sheet; winding a leading end of the prepreg mounted on the plate around the mandrel, and making a pressing force act on the plate and the mandrel therebetween with the prepreg sandwiched between the plate and the mandrel and making a pressing force act on the mandrel and the press roll therebetween with the prepreg sandwiched between the mandrel and the press roll; and winding the prepreg around the mandrel by rotating the mandrel and the press roll.Type: ApplicationFiled: May 28, 2010Publication date: October 4, 2012Applicant: FUJIKURA RUBBER LTD.Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
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Publication number: 20120157217Abstract: An FRP drive shaft is achieved in which the joint strength between the FRP cylinder and the metal joint fixed at each end thereof can be enhanced, thereby capable of achieving a high transfer torque. The FRP drive shaft, according to the present invention, is formed by joining metal end-joints to each end of an FRP cylinder, wherein each of the metal end-joints includes a press-fitting joint having a serrated portion which is press-fitted into the FRP cylinder, and a cylindrical outer collar which is fixed to an outer periphery of the FRP cylinder, and non-circular engaging portions which are engaged with each other to transfer rotation are formed on the press-fitting joint and the cylindrical outer collar, respectively.Type: ApplicationFiled: May 28, 2010Publication date: June 21, 2012Applicant: Fujikura Rubber Ltd.Inventors: Takato Nakamura, Naoki Kimoto
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Publication number: 20110281061Abstract: A method is provided for producing a weight-reduced FRP cylinder which can attain high strength, and also such an FRP cylinder is provided. This FRP cylinder producing method, in which a plurality of prepregs formed by impregnating reinforced fibers with thermosetting resin sheets are wound into a cylinder and thermally cured to be formed as a plurality of FRP layers, includes a simultaneous multilayer winding process in which a torsional rigidity retaining prepreg and a buckling prevention prepreg are continuously wound a plurality of turns with being layered on each other when the plurality of prepregs are wound into a cylinder, wherein the torsional rigidity retaining prepreg includes a layer of fibers oblique to a cylindrical axis direction of the FRP cylinder, and wherein the buckling prevention prepreg includes a layer of fibers orthogonal to the cylindrical axis direction.Type: ApplicationFiled: January 14, 2010Publication date: November 17, 2011Applicant: FUJIKURA RUBBER LTD.Inventors: Takato Nakamura, Norio Matsumoto, Naoki Kimoto
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Publication number: 20110137069Abstract: Disclosed is a method for producing a biphenyltetracarboxylic acid ester by oxidative coupling a phthalic acid ester by using a catalyst comprising at least a palladium salt, a copper salt and a ?-dicarbonyl compound in the presence of a molecular oxygen, wherein the ?-dicarbonyl compound is supplied into a reaction mixture liquid intermittently at an interval of less than 30 minutes, or continuously. This method allows, in particular, the selective and economical production of an asymmetric biphenyltetracarboxylic acid tetraester such as 2,3,3?,4?-biphenyltetracarboxylic acid tetraester.Type: ApplicationFiled: August 6, 2009Publication date: June 9, 2011Applicant: UBE INDUSTRIES, LTD.Inventors: Masayuki Nishio, Hiroaki Imajima, Takato Nakamura, Yoshihiro Yamauchi
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Publication number: 20080113202Abstract: A process for manufacturing a quartz crystal element consists of the steps of producing plural quartz layers on a surface of a crystalline substrate having a lattice constant differing from that of quartz crystal, in which each of the quartz layers consists of a crystalline phase and an amorphous phase, and percentage of the crystalline phase in the quartz layer farther from the substrate is larger than percentage of the crystalline phase in the quartz layer adjacent to the substrate; and producing an epitaxially grown quartz crystal film on the surface of the quartz layer farther from the substrate by a reaction between silicon alkoxide and oxygen.Type: ApplicationFiled: November 13, 2007Publication date: May 15, 2008Applicant: HUMO LABORATORY, LTD.Inventors: Naoyuki TAKAHASHI, Takato NAKAMURA, Satoshi NONAKA, Yoshinori KUBO, Yoichi SHINRIKI, Katsumi TAMANUKI
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Patent number: 7311777Abstract: A process for manufacturing a quartz crystal element consists of the steps of producing plural quartz layers on a surface of a crystalline substrate having a lattice constant differing from that of quartz crystal, in which each of the quartz layers consists of a crystalline phase and an amorphous phase, and percentage of the crystalline phase in the quartz layer farther from the substrate is larger than percentage of the crystalline phase in the quartz layer adjacent to the substrate; and producing an epitaxially grown quartz crystal film on the surface of the quartz layer farther from the substrate by a reaction between silicon alkoxide and oxygen.Type: GrantFiled: August 26, 2004Date of Patent: December 25, 2007Assignee: Humo Laboratory, LtdInventors: Naoyuki Takahashi, Takato Nakamura, Satoshi Nonaka, Yoshinori Kubo, Yoichi Shinriki, Katsumi Tamanuki
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Patent number: 7186295Abstract: A single crystal of quartz thin film and a production method therefor are provided. A method for producing a quartz epitaxial thin film comprises the steps of vaporizing a silicon alkoxide as a silicon source under atmospheric pressure to introduce the silicon alkoxide to a substrate with hydrogen chloride as a reaction promoter, and reacting ethyl silicate with oxygen to deposit a quartz on the substrate. The single crystal of quartz thin film has excellent crystalinity, and optical properties.Type: GrantFiled: December 5, 2003Date of Patent: March 6, 2007Assignee: Humo Laboratory, Ltd.Inventors: Naoyuki Takahashi, Takato Nakamura, Satoshi Nonaka, Hiromi Yagi, Yoichi Shinriki, Katsumi Tamanuki
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Publication number: 20060127692Abstract: An object of the present invention is to provide a single-phase film of a metal sulfide with good quality, and a method for preparing a metal sulfide film at a low cost in a convenient manner. The present invention provides a preparation method of a metal sulfide film, comprising the steps of providing metal halide, such as iron halide (FeCl3, FeI3, FeBr3, FeCl2, FeI2 and FeBr2), as a first raw material and a thioamide compound, such as thioacetamide, as a second raw material, preferably vaporizing these raw materials and reacting them at atmospheric pressure; and a metal sulfide film prepared by this method.Type: ApplicationFiled: August 27, 2003Publication date: June 15, 2006Inventors: Tadashi Takahashi, Naoyuki Takahashi, Takato Nakamura
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Patent number: 7057470Abstract: A quartz oscillator includes a base having a recessed portion provided on one face thereof by processing to have an inverse mesa shape, a quartz thin-film formed on the other face of the base by epitaxial growth to have a thickness of 10 ?m or less, a vibrating reed portion, and excitation electrodes for mechanically supporting the quartz thin-film and for vibrating the vibrating reed portion.Type: GrantFiled: April 16, 2004Date of Patent: June 6, 2006Assignee: Humo Laboratory, Ltd.Inventors: Naoyuki Takahashi, Takato Nakamura, Satoshi Nonaka, Hiromi Yagi, Yoichi Shinriki, Katsumi Tamanuki