Patents by Inventor Takumi Asano
Takumi Asano 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: 20230361661Abstract: A field magnet manufacturing method including reheating and softening a bonded magnet after thermal curing; and press-fitting the softened bonded magnet into a case from an opening on one side of the case. The case has a cylindrical portion and a lid portion coupled to another side of the cylindrical portion. The cylindrical portion has a fixing portion for the bonded magnet. At least the fixing portion is formed of a magnetic material. The press-fitting includes feeding the bonded magnet relatively into the cylindrical portion while allowing a relative posture variation between the bonded magnet and the case. This makes it possible to stably feed even the softened bonded magnet into the case, and the inner surface of the bonded magnet has a similar accuracy to that of the inner surface of the case.Type: ApplicationFiled: September 30, 2020Publication date: November 9, 2023Applicant: AICHI STEEL CORPORATIONInventors: Satoru KAN, Hiroaki HIRANO, Hironar MITARA, Takumi ASANO, Motonobu FURUYAMA
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Publication number: 20230317370Abstract: A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.Type: ApplicationFiled: June 6, 2023Publication date: October 5, 2023Applicant: AICHI STEEL CORPORATIONInventors: Satoru KAN, Hiroaki HIRANO, Hironari MITARAI, Takumi ASANO, Motonobu FURUYAMA
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Patent number: 11710598Abstract: A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.Type: GrantFiled: May 29, 2020Date of Patent: July 25, 2023Assignee: AICHI STEEL CORPORATIONInventors: Satoru Kan, Hiroaki Hirano, Hironari Mitarai, Takumi Asano, Motonobu Furuyama
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Publication number: 20220223341Abstract: A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.Type: ApplicationFiled: May 29, 2020Publication date: July 14, 2022Applicant: AICHI STEEL CORPORATIONInventors: Satoru KAN, Hiroaki HIRANO, Hironari MITARAI, Takumi ASANO, Motonobu FURUYAMA
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Patent number: 9891075Abstract: To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.Type: GrantFiled: February 6, 2014Date of Patent: February 13, 2018Assignee: Mitsubishi Electric CorporationInventors: Takumi Asano, Taizo Iwami, Takashi Tamura, Takeshi Musha
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Publication number: 20160025516Abstract: To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.Type: ApplicationFiled: February 6, 2014Publication date: January 28, 2016Applicant: Mitsubishi Electric CorporationInventors: Takumi ASANO, Taizo IWAMI, Takashi TAMURA, Takeshi MUSHA
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Patent number: 9234738Abstract: A detection track includes a first detection element group that includes a plurality of first magnetic resistance elements arranged at a pitch ?/(2n) when an order to cancel target harmonic components among a plurality of harmonic components superimposed on a fundamental component of a detection signal for multi-pole magnetic pattern is assumed as n, and a second detection element group that includes a plurality of second magnetic resistance elements arranged at the pitch ?/(2n), a plurality of first dummy magnetic resistance elements arranged among the first magnetic resistance elements, and a plurality of second dummy magnetic resistance elements arranged among the second magnetic resistance elements.Type: GrantFiled: November 18, 2010Date of Patent: January 12, 2016Assignee: Mitsubishi Electric CorporationInventors: Takumi Asano, Takeshi Musha, Hiroshi Nishizawa, Takashi Okamuro, Noriyasu Hasegawa
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Patent number: 8704157Abstract: A rotating shaft; a boss that has a fitting hole formed in a center portion thereof, has a clean adhering surface at an end thereof, and is configured so that the rotating shaft is fitted into the fitting hole while the boss is fixed to the rotating shaft by a fixing member; a pulse disk that has an interference-fit hole formed in a center portion thereof for the rotating shaft, has a clean adhesion-receiving surface in a surrounding of the interference-fit hole, is configured so that the rotating shaft is pressed into the interference-fit hole and so that the adhesion-receiving surface is adhered to the adhering surface of the boss by an adhesive agent, and has a position detecting pattern formed thereon; a light emitting element that radiates light; and a light receiving element that receives the light from the light emitting element via the position detecting pattern are included.Type: GrantFiled: April 14, 2009Date of Patent: April 22, 2014Assignee: Mitsubishi Electric CorporationInventors: Toshikazu Satone, Masahiko Yoshida, Kousuke Shamoto, Takumi Asano
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Publication number: 20130200885Abstract: A detection track includes a first detection element group that includes a plurality of first magnetic resistance elements arranged at a pitch ?/(2n) when an order to cancel target harmonic components among a plurality of harmonic components superimposed on a fundamental component of a detection signal for multi-pole magnetic pattern is assumed as n, and a second detection element group that includes a plurality of second magnetic resistance elements arranged at the pitch ?/(2n), a plurality of first dummy magnetic resistance elements arranged among the first magnetic resistance elements, and a plurality of second dummy magnetic resistance elements arranged among the second magnetic resistance elements.Type: ApplicationFiled: November 18, 2010Publication date: August 8, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takumi Asano, Takeshi Musha, Hiroshi Nishizawa, Takashi Okamuro, Noriyasu Hasegawa
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Publication number: 20120006982Abstract: A rotating shaft; a boss that has a fitting hole formed in a center portion thereof, has a clean adhering surface at an end thereof, and is configured so that the rotating shaft is fitted into the fitting hole while the boss is fixed to the rotating shaft by a fixing member; a pulse disk that has an interference-fit hole formed in a center portion thereof for the rotating shaft, has a clean adhesion-receiving surface in a surrounding of the interference-fit hole, is configured so that the rotating shaft is pressed into the interference-fit hole and so that the adhesion-receiving surface is adhered to the adhering surface of the boss by an adhesive agent, and has a position detecting pattern formed thereon; a light emitting element that radiates light; and a light receiving element that receives the light from the light emitting element via the position detecting pattern are included.Type: ApplicationFiled: April 14, 2009Publication date: January 12, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshikazu Satone, Masahiko Yoshida, Kousuke Shamoto, Takumi Asano
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Patent number: 7219549Abstract: An accelerometer for measuring the displacement of a magnet body using magnetic detecting elements is provided, the accelerometer having superior measurement accuracy by suppressing influence of a peripheral magnetic field. The accelerometer has detecting units each having a cantilever which is elastically deformed so as to rotate around a fixed end thereof, a magnet body provided at a free end of the cantilever, and a magnetic detecting head portion disposed outside the rotation region of the cantilever. In order to correct detection signals output from the magnetic detecting head portions, the accelerometer has peripheral magnetic field detecting portions for measuring a peripheral magnetic field acting on the magnetic detecting head portions and the magnet bodies.Type: GrantFiled: March 21, 2005Date of Patent: May 22, 2007Assignee: Aichi Steel CorporationInventors: Yoshinobu Honkura, Michiharu Yamamoto, Yoshiaki Koutani, Masaki Mori, Eiji Kako, Kouei Genba, Takumi Asano, Naoki Ishikawa
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Publication number: 20060123906Abstract: An accelerometer for measuring the displacement of a magnet body using magnetic detecting elements is provided, the accelerometer having superior measurement accuracy by suppressing influence of a peripheral magnetic field. The accelerometer has detecting units each having a cantilever which is elastically deformed so as to rotate around a fixed end thereof, a magnet body provided at a free end of the cantilever, and a magnetic detecting head portion disposed outside the rotation region of the cantilever. In order to correct detection signals output from the magnetic detecting head portions, the accelerometer has peripheral magnetic field detecting portions for measuring a peripheral magnetic field acting on the magnetic detecting head portions and the magnet bodies.Type: ApplicationFiled: March 21, 2005Publication date: June 15, 2006Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Michiharu Yamamoto, Yoshiaki Koutani, Masaki Mori, Eiji Kako, Kouei Genba, Takumi Asano, Naoki Ishikawa
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Patent number: 6666930Abstract: The present invention offers a minute-sized magnet with superior magnetic energy product (BH)max and coercivity iHc, as well as superior anti-corrosive properties. This magnet is comprised of an alloy comprised of 35-55 atomic % platinum, 0.001-10 atomic % third element, which is one or more elements from groups IVa, Va, IIIb, or IVb, and a remainder of iron and other unavoidable impurities. The average crystal size of this FePt alloy is 0.3 &mgr;m. By mixing an FePt alloy with a specific element in a designated ratio, an FePt magnet with more excellent characteristics than ones made from previous alloys was successfully made.Type: GrantFiled: March 4, 2002Date of Patent: December 23, 2003Assignee: Aichi Steel CorporationInventors: Hitoshi Aoyama, Yoshinobu Honkura, Takumi Asano
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Publication number: 20020153066Abstract: The present invention offers a minute-sized magnet with superior magnetic energy product (BH)max and coercivity iHc, as well as superior anti-corrosive properties. This magnet is comprised of an alloy comprised of 35-55 atomic % platinum, 0.0 01-10 atomic % third element, which is one or more elements from groups IVa, Va, IIIb, or IVb, and a remainder of iron and other unavoidable impurities. The average crystal size of this FePt alloy is 0.3 &mgr;m. By mixing an FePt alloy with a specific element in a designated ratio, an FePt magnet with more excellent characteristics than ones made from previous alloys was successfully made.Type: ApplicationFiled: March 4, 2002Publication date: October 24, 2002Applicant: AICHI STEEL CORPORATIONInventors: Hitoshi Aoyama, Yoshinobu Honkura, Takumi Asano