Patents by Inventor Takumi Mio
Takumi Mio 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: 20170011847Abstract: A manufacturing method for a magnet is provided which includes molding, under pressure, magnetic powder in a form of secondary particles resulting from aggregation of primary particles, to obtain a molding. A ratio of an average particle size of the primary particles to a maximum particle size of the secondary particles is 1:150 to 1:200. The magnet in the invention is manufactured by the manufacturing method for a magnet in the invention. The invention allows manufacture of the molding and the magnet in both of which the magnetic powder is densely compressed. The magnet has a high residual magnetic flux density.Type: ApplicationFiled: July 1, 2016Publication date: January 12, 2017Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Publication number: 20170005553Abstract: In a method for manufacturing a rotor, each magnetic steel sheet has protrusions on its one surface and has recesses on the other surface at positions corresponding to the protrusions. The plurality of magnetic steel sheets are joined together as the protrusions of each magnetic steel sheet are fitted in the recesses of its adjoining magnetic steel sheet. A shaft member is inserted into a rotor core in the same direction as that in which the protrusions protrude.Type: ApplicationFiled: June 27, 2016Publication date: January 5, 2017Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Takashi TAMURA, Yusuke KIMOTO
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Publication number: 20170005554Abstract: A rotor includes a rotor core having magnet holes that open to both sides in an axial direction, and magnets placed in the magnet holes. A method for manufacturing the rotor includes: the placing step of placing a material of the magnets containing at least magnetic particles in the magnet holes; and the forming step of forming compacts by compressing the material of the magnets in the magnet holes in the axial direction of the rotor with punch members by using the rotor core as a part of a forming die.Type: ApplicationFiled: June 27, 2016Publication date: January 5, 2017Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Takashi TAMURA, Yusuke KIMOTO
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Publication number: 20160375488Abstract: A manufacturing method for a magnet has step of molding magnetic powder under pressure to obtain a molding. The magnetic powder is pressurized using a mold to which a release agent is applied. The release agent is chemical synthesis oil to which an extreme pressure additive is added.Type: ApplicationFiled: June 17, 2016Publication date: December 29, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Publication number: 20160379755Abstract: A manufacturing method for a magnet includes: a step of obtaining mixed powder of magnetic powder and a lubricant; a step of mixing the mixed powder with an uncured binder that is a silicone composition to attach the binder to a surface of the mixed powder; a step of molding the mixed powder under pressure to obtain a molding, and a step of curing the silicone composition to bind particles of the magnetic powder together,Type: ApplicationFiled: June 17, 2016Publication date: December 29, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Patent number: 9531007Abstract: A production apparatus for an electric storage material includes a dissolution device that dissolves a thickener in a solvent by applying vibration to the solvent, and a kneading device that kneads a solution of the thickener having an adjusted viscosity and an active substance. The thickener is dissolved in the solvent, and a powder of the active substance and the like are dispersed and kneaded in the solution of the thickener having the adjusted viscosity. Thus, kneading can be performed in a short time, and damage to the active substance can be suppressed.Type: GrantFiled: February 4, 2014Date of Patent: December 27, 2016Assignee: JTEKT CORPORATIONInventors: Takumi Mio, Koji Nishi, Junya Fujita, Yoshifumi Fukaya, Takafumi Fujii, Kazuya Suzuki
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Publication number: 20160312902Abstract: A valve device includes: a poppet that is formed in a hollow shaft shape except for a leading end, has a tapered closure part at the leading end and a side hole passing through a wall of the hollow shaft-shaped part, and rotates around a shaft center thereof during opening and closing actions; and a valve seat having a sloped seat surface with which the closure part of the poppet comes into contact when closing the valve device. The closure part of the poppet or the seat surface of the valve seat, whichever has a higher hardness, has a cut mark of the opposite direction from a direction of rotation of the poppet around the shaft center that occurs during the valve closing action.Type: ApplicationFiled: April 26, 2016Publication date: October 27, 2016Applicants: Jtekt Corporation, Toyota Jidosha Kabushiki KaishaInventors: Junya MIYAKE, Koji Nishi, Kazuhisa Sugiyama, Takumi Mio, Sachiko Kubota, Eiji Okawachi, Akira Yamashita, Naohiro Takeshita
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Publication number: 20160314909Abstract: Provided is a lithium ion capacitor that can retain a capacity under a high temperature environment and has small increase in internal resistance while using an aqueous binder for a positive electrode. A lithium ion capacitor includes: a positive electrode; a negative electrode; and an electrolytic solution contacting the positive electrode and the negative electrode. The electrolytic solution includes an organic solvent and a lithium salt electrolyte having an imide structure; the positive electrode includes a collector foil and a positive electrode active material; and the positive electrode active material is held onto the collector foil through a binder including a polymer having a RED value to the electrolytic solution of more than 1, the RED value representing a relative energy difference with respect to the electrolytic solution based on Hansen solubility parameters.Type: ApplicationFiled: April 15, 2016Publication date: October 27, 2016Applicant: JTEKT CORPORATIONInventors: Takashi MATSUURA, Koji NISHI, Naoki OHMI, Yukihiro KOMATSUBARA, Sachiko KUBOTA, Takashi TAMURA, Takumi MIO
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Publication number: 20160307696Abstract: A magnet manufacturing method has preparing magnetic powder of a hard magnetic material, which includes one or more of an Fe-N-based compound and an R-Fe-N-based compound, pressurizing and molding the magnetic powder at a pressure equal to or higher than a fracture pressure at which particles of the magnetic powder are destroyed in order to obtain a primary molding, and heating the primary molding at a temperature lower than a decomposition temperature of the magnetic powder. A particle size distribution measured for the magnetic powder indicates that, for the magnetic powder, a ratio of a particle size with a cumulative frequency of 50% to a particle size with a cumulative frequency of 3% is less than eight.Type: ApplicationFiled: April 8, 2016Publication date: October 20, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Publication number: 20160303651Abstract: A magnet manufacturing method has a step of preparing magnetic powder of a hard magnetic material, which includes one or more of an Fe-N-based compound and an R-Fe-N-based compound, a step of pressurizing and molding the magnetic powder at a pressure equal to or higher than a fracture pressure at which the particles of the magnetic powder are destroyed, to obtain a primary molding, and a step of heating the primary molding at a temperature lower than a decomposition temperature of the magnetic powder. The magnetic powder has at least two peaks in a particle size distribution.Type: ApplicationFiled: April 8, 2016Publication date: October 20, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Publication number: 20160307697Abstract: A magnet manufacturing method has a step of preparing mixed powder of magnetic powder of a hard magnetic material, which includes one or more of an Fe—N-based compound and an R—Fe—N-based compound and a lubricant that allows formation of an adsorption film on a surface of the magnetic powder, a step of heating the mixed powder at a temperature that is equal to or higher than a melting point of the lubricant and that is lower than a decomposition temperature of the magnetic powder to form the adsorption film of the lubricant on the surface of the magnetic powder, a step of pressurizing and molding the magnetic powder in order to obtain a primary molding, and a step of heating the primary molding at a temperature that is lower than the decomposition temperature of the magnetic powder.Type: ApplicationFiled: April 8, 2016Publication date: October 20, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Yusuke KIMOTO, Takashi TAMURA
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Publication number: 20160075052Abstract: An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of the solution of the thickener; a stirring device that mixes the solution of the thickener adjusted in viscosity and powder of an active substance to produce a first mixture, and stirs the first mixture to produce a second mixture; a heating device that heats the solution of the thickener or the first mixture by the time the stirring of the first mixture is started after the solution of the thickener is produced, so as to heat the solution of the thickener contained in the first mixture; and a kneading device that kneads the solution of the thickener and the powder of the active substance which are contained in the second mixture to produce a third mixture.Type: ApplicationFiled: September 11, 2015Publication date: March 17, 2016Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji Nishi, Sachiko Kubota
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Publication number: 20150364737Abstract: In a method for drying a separator for a non-aqueous electric storage device including an organic material that thermally shrinks at a thermal shrinkage start temperature of 100° C. or lower, a solvent impregnation and a drying are executed in this order; the solvent impregnation includes bringing the separator into contact with a solvent that has affinity for water and that causes the azeotropic phenomenon at a temperature lower than the boiling point of water so as to lower an azeotropic temperature of a mixture of moisture in the separator and the solvent below a temperature at which the separator starts thermal shrinkage, and the drying includes drying the separator brought into contact with the solvent at a temperature lower than a temperature at which the separator starts thermal shrinkage and higher than the azeotropic point.Type: ApplicationFiled: June 3, 2015Publication date: December 17, 2015Applicant: JTEKT CORPORATIONInventors: Junya MIYAKE, Naoki Ohmi, Takumi Mio
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Publication number: 20150360392Abstract: An apparatus and a method for manufacturing an electricity storage material are provided which can avoid defective coating of the electricity storage material. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of a solution produced by the dissolving device; a first filtering device that filters the solution having the viscosity adjusted by the viscosity adjusting device; and a kneading device that kneads the solution filtered by the first filtering device and an active material. Since the apparatus can remove almost all microgels of the thickener by the first filtering device, defective coating can be prevented in the coating of the electricity storage material, and satisfactory electrodes can be manufactured.Type: ApplicationFiled: June 5, 2015Publication date: December 17, 2015Applicant: JTEKT CorporationInventors: Takumi MIO, Takafumi FUJII, Yoshifumi Fukaya
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Publication number: 20150239151Abstract: A kneading device includes: a preliminary kneading device that produces a preslurry by agitating a powder and a liquid introduced and transferring them while wetting the powder with the liquid; and a main kneading device that causes the powder to be uniformly dispersed in the preslurry supplied from the preliminary kneading device to produce a slurry. The main kneading device includes a gap defined by two conical surfaces that face each other with a predetermined distance therebetween and rotate relative to each other about their central axes. The slurry is produced by passing the preslurry through the gap. With the preliminary kneading device, the powder is dispersed in the liquid after conforming to the liquid, which suppress damage to the powder. The conditions of main kneading can be changed only by adjusting the gap, which facilitates the operation of changing the conditions of the main kneading.Type: ApplicationFiled: February 23, 2015Publication date: August 27, 2015Applicant: JTEKT CORPORATIONInventors: Takafumi FUJII, Masaru Fuse, Takumi Mio
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Publication number: 20150243963Abstract: A production apparatus for producing an electricity storage material is provided. The electricity storage material includes at least a thickener and an active material. The production apparatus includes a solution production device and a mixture-kneading device. The solution production device produces a surfactant-containing solution of the thickener. The mixture-kneading device kneads the solution together with a powder of the active material.Type: ApplicationFiled: February 24, 2015Publication date: August 27, 2015Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Koji NISHI, Sachiko KUBOTA, Jun ANDO, Yutaka ICHIHARA
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Patent number: 9088014Abstract: A method of manufacturing a secondary battery, using an electrode plate having an electrode mixture layer formed from an electrode mixture paste, includes performing wet preliminary kneading to knead a powder and a solvent with a stirrer, while measuring kneading torque, determining a mixing ratio of the powder to the solvent used in the wet preliminary kneading in the case where the kneading torque once increases as kneading time passes from start of kneading, reaches a peak value, and then decreases, as a desirable mixing ratio, and performing main kneading to mix and knead the powder and the solvent of the electrode mixture paste, at the mixing ratio determined as the desirable mixing ratio, at a shearing speed that does not exceed a speed of shearing a mixture of the powder and the solvent with the stirrer during the wet preliminary kneading, and producing the electrode mixture paste.Type: GrantFiled: January 30, 2013Date of Patent: July 21, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomohide Sumi, Takumi Mio
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Publication number: 20150200396Abstract: An apparatus and method for manufacturing an electricity storage material are provided which allow easily measuring the dissolution rate to solubility of a solution of a powder thickener dissolved in a liquid solvent. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves in a liquid solvent a thickener as powder that is ionized when dissolved; and a dissolution-rate-to-solubility determining device that measures conductivity of the solution produced by the dissolving device and determines a dissolution rate to solubility of the solution based on the measured conductivity. The dissolution rate to solubility can thus be determined without the need to stop the dissolving device during dissolution of the thickener in the liquid solvent. This can significantly improve production efficiency. Since excessive operation of the dissolving device can be prevented, energy saving can be achieved.Type: ApplicationFiled: December 29, 2014Publication date: July 16, 2015Applicant: JTEKT CORPORATIONInventors: Takumi MIO, Yoshifumi FUKAYA, Takafumi FUJII
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Publication number: 20140374643Abstract: There is provided a magnet manufacturing method with which a high residual magnetic flux density is obtained without using dysprosium (Dy) and without using a bonding agent. Magnetic powders made of a hard magnetic material formed of a R—Fe—N compound containing a rare earth element as R or formed of a Fe—N compound are used. In a pressurizing step, the magnetic powders are pressurized by molds multiple times to form a primary compact. In a baking step, a secondary compact is formed by heating the primary compact in an oxidizing atmosphere at a temperature lower than a decomposition temperature of the magnetic powders to bond together the outer surfaces of the adjacent magnetic powders with oxide films formed on the outer surfaces of the magnetic powders.Type: ApplicationFiled: June 13, 2014Publication date: December 25, 2014Inventors: Takumi MIO, Koji NISHI, Toshiyuki BABA
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Publication number: 20140225043Abstract: A production apparatus for an electric storage material includes a dissolution device that dissolves a thickener in a solvent by applying vibration to the solvent, and a kneading device that kneads a solution of the thickener having an adjusted viscosity and an active substance. The thickener is dissolved in the solvent, and a powder of the active substance and the like are dispersed and kneaded in the solution of the thickener having the adjusted viscosity. Thus, kneading can be performed in a short time, and damage to the active substance can be suppressed.Type: ApplicationFiled: February 4, 2014Publication date: August 14, 2014Applicant: JTEKT CorporationInventors: Takumi MIO, Koji Nishi, Junya Fujita, Yoshifumi Fukaya, Takafumi Fujii, Kazuya Suzuki