Patents by Inventor Makoto Kawakami
Makoto Kawakami 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: 10545198Abstract: A magnetic sensor including: a substrate with a main surface; at least two magnetoresistive effect elements formed on the main surface and connected to a power terminal of a bridge circuit; at least two magnetoresistive effect elements formed on the main surface and connected to a ground terminal of the bridge circuit; a first region in which one of the at least two magnetoresistive effect elements connected to the power terminal and one of the at least two magnetoresistive effect elements connected to the ground terminal are disposed; a second region in which another of the at least two magnetoresistive effect elements connected to the power terminal and another of the at least two magnetoresistive effect elements connected to the ground terminal are disposed; and a bias coil including a first bias application part for applying a bias magnetic field to the first region and a second bias application part for applying a bias magnetic field to the second region.Type: GrantFiled: November 18, 2015Date of Patent: January 28, 2020Assignee: HITACHI METALS, LTD.Inventors: Yasunori Takaki, Yasunori Abe, Makoto Kawakami
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Publication number: 20180335483Abstract: A magnetic sensor including: a substrate with a main surface; at least two magnetoresistive effect elements formed on the main surface and connected to a power terminal of a bridge circuit; at least two magnetoresistive effect elements formed on the main surface and connected to a ground terminal of the bridge circuit; a first region in which one of the at least two magnetoresistive effect elements connected to the power terminal and one of the at least two magnetoresistive effect elements connected to the ground terminal are disposed; a second region in which another of the at least two magnetoresistive effect elements connected to the power terminal and another of the at least two magnetoresistive effect elements connected to the ground terminal are disposed; and a bias coil including a first bias application part for applying a bias magnetic field to the first region and a second bias application part for applying a bias magnetic field to the second region.Type: ApplicationFiled: November 18, 2015Publication date: November 22, 2018Applicant: HITACHI METALS, LTD.Inventors: Yasunori TAKAKI, Yasunori ABE, Makoto KAWAKAMI
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Patent number: 9964602Abstract: A magnetic sensor includes: a first current line, a second current line and a third current line that are disposed in parallel to each other in sequence in a width direction and electrically connected in series; and a magnetoresistive effect element disposed under the second current line and extending along a direction of extension of the second current line, the magnetoresistive effect element having an electric resistance that changes by an induced magnetic field generated by current flowing through the first current line, the second current line and the third current line, the following inequality expression (1) being satisfied: Ls/Wg?5??(1) where Ls is a length from an outside of the first current line to an outside of the third current line in a width direction, and Wg is a length in the width direction of the magnetoresistive effect element.Type: GrantFiled: March 17, 2014Date of Patent: May 8, 2018Assignee: HITACHI METALS, LTD.Inventors: Yasunori Takaki, Makoto Kawakami, Yasunori Abe
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Patent number: 9891293Abstract: A magnetic sensor device that includes an annular magnetic body, a coil wound around the magnetic body, the coil configured to apply a magnetic field that rotates 360 degrees by a half way point in a peripheral direction of the magnetic body, and a magnetoresistance effect element arranged at a center of the annular magnetic body and including a fixed layer having a magnetization direction fixed in a direction of the magnetic field to be measured. The magnetic body includes a tapered portion located at a position where a line passing through the center of the magnetic body and extending in a shorter-axis direction intersects the magnetic body, the tapered portion having a narrowed portion narrowed down toward the magnetoresistance effect element, and having dumbbell-shaped inner and outer peripheries, and the narrowed portion having a width reduced toward the magnetoresistance effect element.Type: GrantFiled: November 4, 2016Date of Patent: February 13, 2018Assignee: HITACHI METALS, LTD.Inventors: Makoto Kawakami, Yasunori Takaki, Yasunori Abe, Yasuhito Takeuchi
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Patent number: 9678177Abstract: A magnetic sensor device comprises a thin film first magnetic body provided with a magnetic path convergence/divergence section arranged on a predetermined axis, and at least a pair of wing-shaped sections extending from the magnetic path convergence/divergence section toward the opposite sides of the axis, a thin film second magnetic body provided with a magnetic path convergence/divergence section arranged on the predetermined axis to be spaced from the magnetic path convergence/divergence section of the first magnetic body, at least a pair of wing-shaped sections extending from this magnetic path convergence divergence toward the opposite sides of the axis, a first coil wound around the first magnetic body, a second coil wound around the second magnetic body, and a magnetoresistance effect element arranged between the magnetic path convergence/divergence section of the first magnetic body and the of the second magnetic body, wherein the first coil applies a magnetic field to a magnetic path of the first maType: GrantFiled: March 13, 2013Date of Patent: June 13, 2017Assignee: HITACHI METALS, LTD.Inventors: Makoto Kawakami, Yasunori Takaki, Yasunori Abe, Yasuhito Takeuchi
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Publication number: 20170097395Abstract: A magnetic sensor device includes a thin film first magnetic body provided with a magnetic path convergence/divergence section arranged on a predetermined axis, and at least a pair of wing-shaped sections extending from the magnetic path convergence/divergence section toward the opposite sides of said axis, a thin film second magnetic body provided with a magnetic path convergence/divergence section arranged on the predetermined axis to be spaced from the magnetic path convergence/divergence section of the first magnetic body, at least a pair of wing-shaped sections extending from this magnetic path convergence divergence toward the opposite sides of the axis, a first coil wound around the first magnetic body, a second coil wound around the second magnetic body, and a magnetoresistance effect element arranged between the magnetic path convergence/divergence section of the first magnetic body and the of the second magnetic body.Type: ApplicationFiled: November 4, 2016Publication date: April 6, 2017Applicant: HITACHI METALS, LTD.Inventors: Makoto KAWAKAMI, Yasunori TAKAKI, Yasunori ABE, Yasuhito TAKEUCHI
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Patent number: 9594130Abstract: Provided is a magnetic sensor device capable of attenuating the intensity of the magnetic field to be applied to the magnetic sensor. A magnetic sensor device includes a magnetic sensor element which detects the intensity of a magnetic field in a predetermined detection axis direction, and a magnetic field attenuation body which includes a first magnetic field attenuation unit and a second magnetic field attenuation unit, each of the attenuation units having a surface and the surfaces being opposed to each other with the magnetic sensor element therebetween.Type: GrantFiled: April 22, 2013Date of Patent: March 14, 2017Assignee: HITACHI METALS, LTD.Inventors: Makoto Kawakami, Yasunori Takaki
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Patent number: 9574906Abstract: The present disclosure provides a magnetic medium, a magnetic encoder, and a method for manufacturing a magnetic medium with high reliability that can obtain the sufficient signal output, while reducing the hysteresis error. The magnetic medium is relatively movable with respect to a magnetic sensor for detecting a magnetic field in a magnetosensitive face.Type: GrantFiled: October 24, 2014Date of Patent: February 21, 2017Assignee: HITACHI METALS, LTD.Inventors: Yasunori Abe, Makoto Kawakami
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Publication number: 20160274196Abstract: A magnetic sensor includes: a first current line, a second current line and a third current line that are disposed in parallel to each other in sequence in a width direction and electrically connected in series; and a magnetoresistive effect element disposed under the second current line and extending along a direction of extension of the second current line, the magnetoresistive effect element having an electric resistance that changes by an induced magnetic field generated by current flowing through the first current line, the second current line and the third current line, the following inequality expression (1) being satisfied: Ls/Wg?5 ??(1) where Ls is a length from an outside of the first current line to an outside of the third current line in a width direction, and Wg is a length in the width direction of the magnetoresistive effect element.Type: ApplicationFiled: March 17, 2014Publication date: September 22, 2016Applicant: HITACHI METALS, LTD.Inventors: Yasunori TAKAKI, Makoto KAWAKAMI, Yasunori ABE
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Patent number: 9199271Abstract: The present invention provides a building material in which a coating is applied to a front surface and a side surface is sufficiently adhered to a sealing and method for manufacturing thereof. In a building material in which a coating is applied to a front surface, a coating film on a side surface is removed or reduced by laser irradiation. The part of the side surface in which the coating film has been removed or reduced by laser irradiation has a width of at least 5 mm from a front surface side toward a rear surface side of the building material, or extends over the entire side surface from the front surface side toward the rear surface side of the building material, or is formed more than a part in which coating film is formed.Type: GrantFiled: February 6, 2013Date of Patent: December 1, 2015Assignee: NICHIHA CORPORATIONInventors: Makoto Kawakami, Koji Sawada, Yoshinori Hibino
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Patent number: 9071124Abstract: A mover, in which at each outer surface of a cornered tubular inner yoke, a flat plate magnet magnetized from inside to outside in a direction perpendicular to the outer surface, a flat plate magnet magnetized in an axial direction of the inner yoke, a flat plate magnet magnetized from outside to inside in the direction perpendicular to the outer surface, and a flat plate magnet magnetized in the axial direction of the inner yoke are alternately provided in this order, is passed through an armature in which a first single pole unit and a second single pole unit rotated by 90° with respect to the first single pole unit are alternately stacked, thus forming a linear motor. Windings are collectively wound around core portions of the first single pole unit. Positions of the magnets provided at the outer surfaces of the inner yoke are deviated from each other.Type: GrantFiled: March 18, 2014Date of Patent: June 30, 2015Assignee: Hitachi Metals, Ltd.Inventor: Makoto Kawakami
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Publication number: 20150115939Abstract: The present disclosure provides a magnetic medium, a magnetic encoder, and a method for manufacturing a magnetic medium with high reliability that can obtain the sufficient signal output, while reducing the hysteresis error.Type: ApplicationFiled: October 24, 2014Publication date: April 30, 2015Applicant: HITACHI METALS, LTD.Inventors: Yasunori ABE, Makoto KAWAKAMI
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Publication number: 20150097560Abstract: Provided is a magnetic sensor device capable of attenuating the intensity of the magnetic field to be applied to the magnetic sensor. A magnetic sensor device includes a magnetic sensor element which detects the intensity of a magnetic field in a predetermined detection axis direction, and a magnetic field attenuation body which includes a first magnetic field attenuation unit and a second magnetic field attenuation unit, each of the attenuation units having a surface and the surfaces being opposed to each other with the magnetic sensor element therebetween.Type: ApplicationFiled: April 22, 2013Publication date: April 9, 2015Applicant: HITACHI METALS, LTD.Inventors: Makoto Kawakami, Yasunori Takaki
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Publication number: 20150048819Abstract: A magnetic sensor device includes a thin film first magnetic body provided with a magnetic path convergence/divergence section arranged on a predetermined axis, and at least a pair of wing-shaped sections extending from the magnetic path convergence/divergence section toward the opposite sides of said axis, a thin film second magnetic body provided with a magnetic path convergence/divergence section arranged on the predetermined axis to be spaced from the magnetic path convergence/divergence section of the first magnetic body, at least a pair of wing-shaped sections extending from this magnetic path convergence divergence toward the opposite sides of the axis, a first coil wound around the first magnetic body, a second coil wound around the second magnetic body, and a magnetoresistance effect element arranged between the magnetic path convergence/divergence section of the first magnetic body and the of the second magnetic body.Type: ApplicationFiled: March 13, 2013Publication date: February 19, 2015Applicant: HITACHI METALS, LTD.Inventors: Makoto Kawakami, Yasunori Takaki, Yasunori Abe, Yasuhito Takeuchi
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Publication number: 20150035388Abstract: An object is to provide a linear motor in which even when the moving range of a movable element is long, the quantity of magnets to be employed is not increased. A linear motor comprising; a movable element is in a plurality of magnets and armature cores linked alternately along a moving direction are arranged in the inside of a coil and then adjacent magnets with an armature core in between are magnetized in opposite directions; the stator includes two opposite plate-shaped parts elongated in the moving direction of the movable element and linked magnetically; in each of opposite faces of the two plate-shaped parts, tooth parts composed of magnetic material having a substantially rectangular parallelepiped shape similar to a bar shape are arranged at given intervals; and the movable element moves along an arrangement direction of the tooth parts between the two opposite plate-shaped parts.Type: ApplicationFiled: February 12, 2013Publication date: February 5, 2015Inventors: Masahiro Mita, Masahiro Masuzawa, Makoto Kawakami
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Patent number: 8884473Abstract: A mover configured such that a plate-like magnet magnetized in one longitudinal direction, a soft magnetic element, a plate-like magnet magnetized in the other longitudinal direction, and the soft magnetic element are alternately stacked in the order mentioned above continuously is passed through an armature having a configuration in which a first subunit having core portions extending from a yoke portion in a thickness direction of the mover and a second subunit having core portions extending from a yoke portion in a width direction of the mover are alternately disposed to thereby constitute a linear motor. Windings and are collectively wound around the core portions of the second subunit.Type: GrantFiled: August 24, 2009Date of Patent: November 11, 2014Assignee: Hitachi Metals, Ltd.Inventor: Makoto Kawakami
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Publication number: 20140225459Abstract: A mover, in which at each outer surface of a cornered tubular inner yoke, a flat plate magnet magnetized from inside to outside in a direction perpendicular to the outer surface, a flat plate magnet magnetized in an axial direction of the inner yoke, a flat plate magnet magnetized from outside to inside in the direction perpendicular to the outer surface, and a flat plate magnet magnetized in the axial direction of the inner yoke are alternately provided in this order, is passed through an armature in which a first single pole unit and a second single pole unit rotated by 90° with respect to the first single pole unit are alternately stacked, thus forming a linear motor. Windings are collectively wound around core portions of the first single pole unit. Positions of the magnets provided at the outer surfaces of the inner yoke are deviated from each other.Type: ApplicationFiled: March 18, 2014Publication date: August 14, 2014Applicant: HITACHI METALS, LTD.Inventor: Makoto KAWAKAMI
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Patent number: 8723376Abstract: A mover, in which at each outer surface of a cornered tubular inner yoke, a flat plate magnet magnetized from inside to outside in a direction perpendicular to the outer surface, a flat plate magnet magnetized in an axial direction of the inner yoke, a flat plate magnet magnetized from outside to inside in the direction perpendicular to the outer surface, and a flat plate magnet magnetized in the axial direction of the inner yoke are alternately provided in this order, is passed through an armature in which a first single pole unit and a second single pole unit rotated by 90° with respect to the first single pole unit are alternately stacked, thus forming a linear motor. Windings are collectively wound around core portions of the first single pole unit. Positions of the magnets provided at the outer surfaces of the inner yoke are deviated from each other.Type: GrantFiled: January 22, 2010Date of Patent: May 13, 2014Assignee: Hitachi Metals, Ltd.Inventor: Makoto Kawakami
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Patent number: 8439677Abstract: The present invention provides a maintenance apparatus for increasing the service life of a medical handpiece. The maintenance apparatus is provided with a first fluid supply which feeds a maintenance fluid to the bearings of a handpiece, capable of rotatably supporting a rotary tool, and a second fluid supply which feeds the maintenance fluid to the chucking structure of the handpiece, capable of detachably holding the rotary tool.Type: GrantFiled: July 23, 2004Date of Patent: May 14, 2013Assignee: J. Morita Manufacturing CorporationInventors: Makoto Numakawa, Shigehiko Inoue, Makoto Kawakami, Hirofumi Jikuhara
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Patent number: 8404331Abstract: The present invention provides a building material in which a coating is applied to a front surface and a side surface is sufficiently adhered to a sealing and method for manufacturing thereof. In a building material in which a coating is applied to a front surface, a coating film on a side surface is removed or reduced by laser irradiation. The part of the side surface in which the coating film has been removed or reduced by laser irradiation has a width of at least 5 mm from a front surface side toward a rear surface side of the building material, or extends over the entire side surface from the front surface side toward the rear surface side of the building material, or is formed more than a part in which coating film is formed.Type: GrantFiled: May 29, 2009Date of Patent: March 26, 2013Assignee: Nichiha CorporationInventors: Makoto Kawakami, Koji Sawada, Yoshinori Hibino