Patents by Inventor Yoji Yamada
Yoji Yamada 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: 9859761Abstract: A rotor includes a first rotor core, a second rotor core, a permanent magnet and a resin layer. The first rotor core includes a first core base and first claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the first core base. The second rotor core includes a second core base and second claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the second core base. The first rotor core and the second rotor core are combined with each other so that the first and second core bases are opposed to each other and the first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction of the rotor. The permanent magnet includes at least a main field magnet. The main field magnet is located between the first and second core bases in the axial direction, and is magnetized in the axial direction.Type: GrantFiled: January 17, 2014Date of Patent: January 2, 2018Assignee: ASMO CO., LTD.Inventors: Yoji Yamada, Chie Morita, Seiya Yokoyama, Koji Mikami, Takahiro Tsuchiya
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Publication number: 20170366050Abstract: An axial gap motor rotor opposes a stator in an axial direction. The axial gap motor rotor includes a rotor core and a magnet. The magnet is arranged on the rotor core. The magnet is configured so that one axial end includes magnetic poles that alternately change in a circumferential direction. The rotor core includes a base, which is located at a center in a radial direction, and radial extensions, which are extended from the base outward in the radial direction and arranged in the circumferential direction. The magnet is configured to at least partially overlap the radial extensions in the axial direction. The radial extensions are located to include a boundary of adjacent ones of the magnetic poles in the circumferential direction.Type: ApplicationFiled: June 19, 2017Publication date: December 21, 2017Inventors: Akihisa Hattori, Seiya Yokoyama, Yoji Yamada
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Patent number: 9787148Abstract: A rotor of a motor includes first and second rotor cores, a field magnet, and a commutator magnet. The first and second rotor cores each include a core base and a plurality of claw poles. The claw poles of the first rotor core and the claw poles of the second rotor core are alternately arranged in a circumferential direction. The field magnet is located between the core bases. The field magnet is magnetized in an axial direction so that the claw poles of the first rotor core and the claw poles of the second rotor core function as different magnetic poles in the circumferential direction. The commutator magnet is located on an outer circumference of the field magnet around the claw poles. The commutator magnet is magnetized so that surfaces having the same polarity face each other between the claw poles and the commutator magnet.Type: GrantFiled: December 18, 2015Date of Patent: October 10, 2017Assignee: Asmo Co., Ltd.Inventors: Yoji Yamada, Koji Mikami, Akihiro Utsumi, Akihisa Hattori, Chie Morita
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Patent number: 9780610Abstract: A rotor includes first and second rotor cores, a field magnet, and an annular magnet. The first and second rotor cores each include a core base and core magnetic poles. The core magnetic poles are provided on an outer peripheral portion of the core base at equal intervals. The core bases are faced with each other. The core magnetic poles are alternately arranged in a peripheral direction. The annular magnet is a resin molding product including a magnetic pole magnet portion and an inter-pole magnet portion. The annular magnet has a non-contact portion not in contact with the first and second rotor cores. A gate mark portion in injection molding of the annular magnet is arranged in the non-contact portion.Type: GrantFiled: April 9, 2015Date of Patent: October 3, 2017Assignee: Asmo Co., Ltd.Inventors: Yoji Yamada, Chie Morita, Takahiro Tsuchiya, Seiya Yokoyama
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Publication number: 20170279319Abstract: A motor includes a stator, a rotor, a case, and back-surface magnet portions. The rotor has a first rotor core, a second rotor core and a field magnet. Each of the first and second rotor cores has a core base and claw-shaped magnetic poles. The field magnet is sandwiched between the first rotor core and the second rotor core and causes the claw-shaped magnetic poles of the first rotor core and the second rotor core to function as different magnetic poles. The back-surface magnet portions include a second and a first back-surface magnet portions respectively provided on the back surfaces of the claw-shaped magnetic poles of the second rotor core and the first rotor core. Size of the second back-surface magnet portion differs from size of the first back-surface magnet portion are different from each other.Type: ApplicationFiled: June 12, 2017Publication date: September 28, 2017Applicant: ASMO CO., LTD.Inventors: Yoji Yamada, Koji Mikami, Takahiro Tsuchiya, Hironari Suzuki, Seiya Yokoyama
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Patent number: 9774222Abstract: A rotor includes a field member arranged between a first core base of a first rotor core and a second core base of a second rotor core in the axial direction. When magnetized in the axial direction, the field member causes primary claw-shaped magnetic poles to function as primary magnetic poles and secondary claw-shaped magnetic poles to function as secondary magnetic poles. The field member is formed by placing a plurality of members one over another in the axial direction.Type: GrantFiled: July 29, 2015Date of Patent: September 26, 2017Assignee: ASMO CO., LTD.Inventor: Yoji Yamada
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Publication number: 20170247700Abstract: The present invention provides a nucleic acid having activity to suppress expression of ?2GPI, a pharmaceutical composition comprising the nucleic acid, and a prophylactic or therapeutic drug containing the nucleic acid for autoimmune diseases such as APS, SLE and the like and thrombosis in hemodialysis.Type: ApplicationFiled: May 13, 2017Publication date: August 31, 2017Applicant: KYOWA HAKKO KIRIN CO., LTD.Inventors: Yoji YAMADA, Hiroto IWAI, Kazuhiro MASUDA, Minako KANDA
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Publication number: 20170247701Abstract: The present invention provides a nucleic acid having activity to suppress expression of ?2GPI, a pharmaceutical composition comprising the nucleic acid, and a prophylactic or therapeutic drug containing the nucleic acid for autoimmune diseases such as APS, SLE and the like and thrombosis in hemodialysis.Type: ApplicationFiled: May 13, 2017Publication date: August 31, 2017Applicant: KYOWA HAKKO KIRIN CO., LTD.Inventors: Yoji YAMADA, Hiroto IWAI, Kazuhiro MASUDA, Minako KANDA
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Patent number: 9705365Abstract: A motor includes a stator, a rotor, a case, and back-surface magnet portions. The rotor has a first rotor core, a second rotor core and a field magnet. Each of the first and second rotor cores has a core base and claw-shaped magnetic poles. The field magnet is sandwiched between the first rotor core and the second rotor core and causes the claw-shaped magnetic poles of the first rotor core and the second rotor core to function as different magnetic poles. The back-surface magnet portions include a second and a first back-surface magnet portions respectively provided on the back surfaces of the claw-shaped magnetic poles of the second rotor core and the first rotor core. Size of the second back-surface magnet portion differs from size of the first back-surface magnet portion are different from each other.Type: GrantFiled: April 13, 2015Date of Patent: July 11, 2017Assignee: ASMO CO., LTD.Inventors: Yoji Yamada, Koji Mikami, Takahiro Tsuchiya
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Patent number: 9673669Abstract: A brushless motor includes a rotor. The rotor includes a first rotor core, a second rotor core and a field magnet. The first rotor core includes a plurality of first magnetic pole portions arranged in a circumferential direction. The second rotor core includes a plurality of second magnetic pole portions arranged in the circumferential direction. The field magnet is arranged between the first rotor core and the second rotor core in an axial direction. When the field magnet is magnetized in the axial direction, the first magnetic pole portions function as first magnetic poles and the second magnetic pole portions function as second magnetic poles.Type: GrantFiled: November 8, 2013Date of Patent: June 6, 2017Assignee: ASMO CO., LTD.Inventors: Yoji Yamada, Koji Mikami, Chie Morita, Takahiro Tsuchiya, Seiya Yokoyama, Takayoshi Suzuki
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Patent number: 9667107Abstract: A motor including a stator and a rotor. The stator includes teeth and windings. Each tooth has a distal portion defined by a radially inward side of the stator. The rotor, which is arranged inward in the radial direction from the stator, includes a rotor core, magnets, and salient poles. Each salient pole is separated by a void from the magnet that is adjacent in the circumferential direction. The distal portion of each tooth is longer than a radially outward side of each magnet.Type: GrantFiled: May 27, 2014Date of Patent: May 30, 2017Assignee: Asmo Co., Ltd.Inventors: Yoji Yamada, Seiya Yokoyama, Keisuke Koide, Yoshiaki Takemoto, Shigemasa Kato
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Patent number: 9653952Abstract: A motor includes a rotor and a stator. The rotor includes a plurality of magnets, which function as first magnetic poles, and salient poles, which function as second magnetic poles. A ratio X1:X2 of a quantity X1 of magnetic pole portions of the rotor, which is the sum of the quantity of the magnets and the quantity of the salient poles, and the quantity X2 of slots is 2n:3n (n being a natural number). The sum of a magnetic pole occupying angle ?1 of the magnet and a magnetic pole occupying angle ?2 of the salient pole is 360°. The magnetic pole occupying angle ?1 is set in a range of 180°<?1?230°.Type: GrantFiled: May 27, 2014Date of Patent: May 16, 2017Assignee: Amso Co., LTD.Inventors: Yoji Yamada, Seiya Yokoyama, Shigemasa Kato, Yoshiaki Takemoto, Yoko Tateishi
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Publication number: 20170056262Abstract: A life assistance system includes an automatic liftable chair and an autonomous mobile robot connected to the automatic liftable chair via a network. The life assistance system assists a user in the action of standing up from the automatic liftable chair. The life assistance system is configured such that upon reception of a stand-up assist instruction by the autonomous mobile robot, the automatic liftable chair executes a first assisting action and that upon detection of a load applied to a handle of the autonomous mobile robot, the automatic liftable chair executes a second assisting action.Type: ApplicationFiled: August 11, 2016Publication date: March 2, 2017Inventors: KAZUNORI YAMADA, MAYU YOKOYA, HIDETSUGU MAEKAWA, YOJI YAMADA, PEI DI
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Patent number: 9577496Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and a detected portion. The first rotor core includes a first core base and a plurality of first claw-shaped magnetic pole portions. The second rotor core includes a second core base and a plurality of second claw-shaped magnetic pole portions. The first and second core bases face to each other, and the first and second claw-shaped magnetic pole portions are alternately arranged in the circumferential direction. The field magnet is located between the first and second core bases in the axial direction. The field magnet has the first claw-shaped magnetic pole portion function as a first magnetic pole and has the second claw-shaped magnetic pole portion function as a second magnetic pole. A detected portion, which generates a magnetic flux, is arranged at an outer axial end surface of the first rotor core.Type: GrantFiled: November 8, 2013Date of Patent: February 21, 2017Assignee: ASMO CO., LTD.Inventors: Shigemasa Kato, Yoji Yamada, Koji Mikami, Seiya Yokoyama
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Publication number: 20170033650Abstract: A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Inventors: Koji MIKAMI, Yoji YAMADA
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Patent number: 9502931Abstract: A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.Type: GrantFiled: March 15, 2013Date of Patent: November 22, 2016Assignee: ASMO CO., LTD.Inventor: Yoji Yamada
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Patent number: 9502929Abstract: A rotor with a first rotor core, a second rotor core, a field magnet, and an interpole magnet is provided. The first rotor core has a first core base and a plurality of first nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the first core base. The second rotor core has a second core base and a plurality of second nail-shaped magnetic pole parts that extend in the axis direction from the outer circumference section of the second core base. The field magnet is magnetized along the axis direction and makes the first nail-shaped magnetic parts function as first magnetic poles and the second nail-shaped magnetic parts function as second magnetic poles. The interpole magnet is arranged between the first nail-shaped magnetic parts and the second nail-shaped magnetic parts. The interpole magnet has the same polarity as the first and second nail-shaped magnetic pole parts, in the sections where same face the first and second nail-shaped magnetic pole parts.Type: GrantFiled: November 18, 2011Date of Patent: November 22, 2016Assignee: ASMO CO., LTD.Inventors: Yoji Yamada, Chie Morita, Yuuki Fujii, Shigemasa Kato
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Publication number: 20160333346Abstract: The present invention provides a nucleic acid having activity to suppress expression of ?2GPI, a pharmaceutical composition comprising the nucleic acid, and a prophylactic or therapeutic drug containing the nucleic acid for autoimmune diseases such as APS, SLE and the like and thrombosis in hemodialysis.Type: ApplicationFiled: January 16, 2015Publication date: November 17, 2016Applicant: KYOWA HAKKO KIRIN CO., LTD.Inventors: Yoji YAMADA, Hiroto IWAI, Kazuhiro MASUDA, Minako KANDA
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Patent number: 9490669Abstract: A rotor includes a first rotor core, a second rotor core, a field magnet, and a back magnet. The first rotor core includes a disk-shaped first core base and a plurality of first claw-poles. The second rotor core includes a disk-shaped second core base and a plurality of second claw-poles. The field magnet has the first claw-poles function as first magnetic poles and the second claw-poles function as second magnetic poles. The back magnet is arranged along back surfaces of the first and second claw-poles. The back magnet is magnetized such that radially outer sections have the polarities that are the same as the first and second magnetic poles. The back magnet is formed integrally, has an annular shape, and is in contact with all of the back surfaces of the first and second claw-poles.Type: GrantFiled: August 13, 2013Date of Patent: November 8, 2016Assignee: ASMO CO., LTD.Inventor: Yoji Yamada
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Patent number: 9490671Abstract: A rotor having an axial direction includes at least a pair of rotor cores arranged in the axial direction, and a field magnet located between the rotor cores and magnetized in the axial direction. Each of the rotor cores includes a plurality of claw poles extending in the axial direction. Each of the rotor cores includes a magnetic flux controlling section, which appropriately causes a magnetic flux to flow to the claw poles.Type: GrantFiled: July 27, 2015Date of Patent: November 8, 2016Assignee: ASMO CO., LTD.Inventors: Yoji Yamada, Chie Morita