Patents by Inventor Hisashi Mimura
Hisashi Mimura 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: 8674687Abstract: An angle detection device of the present invention includes: a stator which includes a plurality of salient pole portions which are formed on a flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor which is made of a magnetic material and is provided rotatably relative to the stator such that gap permeance between the rotor and each salient pole portion is changed due to the rotation of the rotor about a rotational axis of the rotor. According to the angle detection device of the present invention, it is possible to provide the angle detection device which can largely reduce the number of parts and can realize the reduction of cost and the enhancement of reliability.Type: GrantFiled: June 9, 2009Date of Patent: March 18, 2014Assignee: Tamagawa Seiki Co., Ltd.Inventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura
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Patent number: 8669760Abstract: An angle detection system of the present invention includes: a stator 200 which includes a plurality of salient pole portions which are formed on a flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor 300 which is made of a magnetic material and is configured to be rotatable relative to the stator such that gap permeance between the rotor and each salient pole portion is changed due to the rotation thereof about a rotational axis thereof. According to the angle detection device of the present invention, it is possible to provide the angle detection device which can largely reduce the number of parts and can realize the reduction of cost and the enhancement of reliability.Type: GrantFiled: May 9, 2009Date of Patent: March 11, 2014Assignee: Tamagawa Seiki Co., Ltd.Inventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura, Minow Okada
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Publication number: 20110285386Abstract: An angle detection system of the present invention includes: a stator 200 which includes a plurality of salient pole portions which are formed on a flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor 300 which is made of a magnetic material and is configured to be rotatable relative to the stator such that gap permeance between the rotor and each salient pole portion is changed due to the rotation thereof about a rotational axis thereof. According to the angle detection device of the present invention, it is possible to provide the angle detection device which can largely reduce the number of parts and can realize the reduction of cost and the enhancement of reliability.Type: ApplicationFiled: May 9, 2009Publication date: November 24, 2011Applicant: TAMAGAWA SEIKI CO., LTD.Inventors: Yoshimi Kikuchi, Masahito Okada, Kanji Kitazawa, Hisashi Mimura
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Publication number: 20110133965Abstract: An angle detection device of the present invention includes: a stator which includes a plurality of salient pole portions which are formed on a flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor which is made of a magnetic material and is provided rotatably relative to the stator such that gap permeance between the rotor and each salient pole portion is changed due to the rotation of the rotor about a rotational axis of the rotor. According to the angle detection device of the present invention, it is possible to provide the angle detection device which can largely reduce the number of parts and can realize the reduction of cost and the enhancement of reliability.Type: ApplicationFiled: June 9, 2009Publication date: June 9, 2011Applicant: TAMAGAWA SEIKI CO., LTD.Inventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura
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Patent number: 7852069Abstract: An angle detector including an annular stator board (1); a plurality of stators (5) provided on the annular stator board (1) independently of one another and forming slots (10) at constant or various intervals; a magnetic core (11) formed on surfaces of the stators (5); stator windings (4) formed around the magnetic cores (11) and composed of excitation windings (4a) and output windings (4b); a magnetic flux return path plateau (12) provided on each of the surfaces of the stators (5) and provided inward or outward of the stator windings (4); an annular rotor board (6) provided on the magnetic flux return path plateaus (12); and a gap forming board (13) provided on an inner surface (6a) of the annular rotor board (6) and having a board inner surface (13a) whose protrusion state changes according to a waveform. The annular rotor board rotates to cause changes in a gap (14) between each of the magnetic cores (11) and the board inner surface (13a) of the gap forming board (13).Type: GrantFiled: April 24, 2007Date of Patent: December 14, 2010Assignee: Tamagawa Seiki Kabushiki KaishaInventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura, Masahito Okada, Yonezo Kubota
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Patent number: 7816912Abstract: An angle detector includes a magnetic rotor and a plurality of magnetic stator portions. The magnetic stator portions are arranged separately in an annular stator frame and each magnetic stator portion includes a pair of magnetic stator strips. The periphery of the magnetic rotor is disposed between the magnetic stator strips of each magnetic stator portion. By such a configuration, accurate angle detection can be carried out irrespective of the decentering of a rotary shaft.Type: GrantFiled: April 16, 2007Date of Patent: October 19, 2010Assignee: Tamagawa Seiki Kabushiki KaishaInventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura
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Publication number: 20090289622Abstract: It is an object of the present invention to obtain an ultrathin angle detector by disposing an annular rotor board face to face with stator windings of a plurality of stators provided on an annular stator board. An angle detector according to the present invention is constructed by providing magnetic cores and the stator windings on the respective stators provided on a surface of the annular stator board via slots, and disposing a corrugated curved surface formed on a board inner surface of the annular rotor board face to face with the stators so as to obtain an angular signal that changes according to a sinusoidal waveform.Type: ApplicationFiled: April 24, 2007Publication date: November 26, 2009Inventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura, Masahito Okada, Yonezo Kubota
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Publication number: 20090033320Abstract: In an angle detector according to the present invention, a magnetic rotor is rotated while being face-to-face between a pair of magnetic stator strips of each of magnetic stator portions provided separately to an annular stator frame, so high-accuracy detection is carried out irrespective of decentering of a rotary shaft.Type: ApplicationFiled: April 16, 2007Publication date: February 5, 2009Inventors: Yoshimi Kikuchi, Kanji Kitazawa, Hisashi Mimura
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Patent number: 7298138Abstract: In a stator structure for a rotation detector according to the present invention, a stator body is formed by rotating a plurality of annular stator pieces by a predetermined angle for each stator piece and laminating them, and a resin-molded frame body having a mounting ear is disposed on an outer periphery of the stator body, such that the stator body can be mounted in other equipment or the like by using the mounting ear.Type: GrantFiled: December 9, 2002Date of Patent: November 20, 2007Assignee: Tamagawa Seiko Kabushiki KaishaInventor: Hisashi Mimura
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Publication number: 20070069599Abstract: In a stator structure for a rotation detector according to the present invention, a stator body is formed by rotating a plurality of annular stator pieces by a predetermined angle for each stator piece and laminating them, and a resin-molded frame body having a mounting ear is disposed on an outer periphery of the stator body, such that the stator body can be mounted in other equipment or the like by using the mounting ear.Type: ApplicationFiled: December 9, 2002Publication date: March 29, 2007Inventor: Hisashi Mimura
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Patent number: 6873074Abstract: Disclosed is a terminal connection structure of a resolver stator coil in which a part of the end portion of the stator coil is left as a free end portion which is free with respect to the terminals, whereby external impact is absorbed, and rupture of the stator coil is prevented, thereby achieving an improvement in reliability. An end portion (3) of a stator coil (1) is wound around terminals (4) to form a winding connection portion (5), and a part of the end portion (3) is left as a free end portion (30) which is not integrally connected to the terminals (4) by soldering or fusing, whereby a spring function is obtained.Type: GrantFiled: June 26, 2002Date of Patent: March 29, 2005Assignee: Tamagawa Seiki Kabushiki KaishaInventor: Hisashi Mimura
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Patent number: 6838804Abstract: To improve winding speed and productivity of a rotating machine by providing curved edges on corner portions of tongues of an insulation cap body. In an insulation cap structure for the rotating machine, corner portions of tongues of an insulation cap body disposed in a stator core or a rotor core is formed so as to have curved edges, and a locus of a needle at the time of winding is close to a circle rather than a rectangle of prior art, whereby winding speed can be increased.Type: GrantFiled: December 9, 2002Date of Patent: January 4, 2005Assignee: Tamagawa Seiki Kabushiki KaishaInventor: Hisashi Mimura
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Patent number: 6750577Abstract: To ensure mounting between a stator body and a motor or the like by causing a connector portion integrally formed to an insulating member to be positioned away from the stator body through an inclined surface and a gap. In a stator structure for a rotation detector according to the present invention, the inclined surface is formed on the connector portion placed at a part of one of a pair of insulating members of the stator body, and this inclined surface and the gap cause the connector portion to be located away from the stator body, whereby the stator body can be certainly mounted in a motor or the like.Type: GrantFiled: December 9, 2002Date of Patent: June 15, 2004Assignee: Tamagawa Seiki Kabushiki KaishaInventor: Hisashi Mimura
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Patent number: 6724109Abstract: A resolver stator includes a stator coil which is fixed to magnetic poles of the resolver stator by a resin softer than an epoxy, whereby disconnection in the stator coil is avoided when the resolver stator is used in an environment in which temperature varies in a wide range. Wire ends of the stator coil are each wound around a terminal and fixed thereto such that one part of the wound wire end is left free from the terminal, whereby disconnection of wires is avoided.Type: GrantFiled: December 5, 2001Date of Patent: April 20, 2004Assignee: Tamagawa Seiki Kabushiki KaishaInventor: Hisashi Mimura
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Publication number: 20040015319Abstract: To detect a difference between rotation angles of respective shafts by using non-contact type resolvers with high precision. In a steering rotation detector according to the present invention, a rotation angle of a first shaft of a steering wheel is detected by a first rotation detecting unit of a resolver, a rotation angle of a second shaft of front wheels side is detected by a second rotation detecting unit of a resolver, whereby a power steering with high precision is obtained.Type: ApplicationFiled: January 10, 2003Publication date: January 22, 2004Applicant: TAMAGAWA SEIKI KABUSHIKI KAISHAInventor: Hisashi Mimura
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Publication number: 20030222521Abstract: To ensure mounting between a stator body and a motor or the like by causing a connector portion integrally formed to an insulating member to be positioned away from the stator body through an inclined surface and a gap. In a stator structure for a rotation detector according to the present invention, the inclined surface is formed on the connector portion placed at a part of one of a pair of insulating members of the stator body, and this inclined surface and the gap cause the connector portion to be located away from the stator body, whereby the stator body can be certainly mounted in a motor or the like.Type: ApplicationFiled: December 9, 2002Publication date: December 4, 2003Applicant: TAMAGAWA SEIKI KABUSHIKI KAISHAInventor: Hisashi Mimura
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Publication number: 20030222529Abstract: To improve winding speed and productivity of a rotating machine by providing curved edges on corner portions of tongues of an insulation cap body. In an insulation cap structure for the rotating machine, corner portions of tongues of an insulation cap body disposed in a stator core or a rotor core is formed so as to have curved edges, and a locus of a needle at the time of winding is close to a circle rather than a rectangle of prior art, whereby winding speed can be increased.Type: ApplicationFiled: December 9, 2002Publication date: December 4, 2003Applicant: TAMAGAWA SEIKI KABUSHIKI KAISHAInventor: Hisashi Mimura
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Publication number: 20030032834Abstract: A compound of the formula [Ig]; wherein R1 is hydrogen or an amino protective group, R2 is hydrogen or hydroxy, and R3 and R4 are independently N-methyl-methoxycarbonylamino, N-ethyl-methoxycarbonylamino, N-propyl-methoxycarbonylamino or 3-ethylureid, or R3 and R4 are both methoxycarbonylamino substituted at a meta position of the benzene rings, or a salt thereof, and (2S)-1-phenoxy-3-[3,3-bis[4-methoxycarbonylamino)-phenyl]propylamino]-2-propanol sulfate (2:1) and some crystal forms thereof as &bgr;3adrenergic receptor agonists.Type: ApplicationFiled: August 19, 2002Publication date: February 13, 2003Inventors: Hiroshi Kayakiri, Naoaki Fujii, Hitoshi Hamashima, Minoru Sakurai, Kenichi Washizuka, Yasuyo Tomishima, Kiyoshi Taniguchi, Naoko Unami, Yutaka Kono, Hirofumi Ishikawa, Nobuhiro Yamamoto, Hisashi Mimura
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Publication number: 20030006657Abstract: Disclosed is a terminal connection structure of a resolver stator coil in which a part of the end portion of the stator coil is left as a free end portion which is free with respect to the terminals, whereby external impact is absorbed, and rupture of the stator coil is prevented, thereby achieving an improvement in reliability. An end portion (30) of a stator coil (1) is wound around terminals (4) to form a winding connection portion (5), and a part of the end portion (3) is left as a free end portion (30) which is not integrally connected to the terminals (4) by soldering or fusing, whereby a spring function is obtained.Type: ApplicationFiled: June 26, 2002Publication date: January 9, 2003Applicant: TAMAGAWA SEIKI KABUSHIKI KAISHAInventor: Hisashi Mimura
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Publication number: 20030006666Abstract: A resolver stator includes a stator coil which is fixed to magnetic poles of the resolver stator by a resin softer than an epoxy, whereby disconnection in the stator coil is avoided when the resolver stator is used in an environment in which temperature varies in a wide range. Wire ends of the stator coil are each wound around a terminal and fixed thereto such that one part of the wound wire end is left free from the terminal, whereby disconnection of wires is avoided.Type: ApplicationFiled: December 5, 2001Publication date: January 9, 2003Applicant: TAMAGAWA SEIKI KABUSHIKI KAISHAInventor: Hisashi Mimura