Patents by Inventor Takushi Fujioka

Takushi Fujioka 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).

  • Publication number: 20110241467
    Abstract: A permanent magnet motor is provided. The permanent magnet motor includes: a stator including a stator core, and an insulator for insulating the stator core from the wire; and a rotor in which a rotating shaft is attached to a center of the rotor and a permanent magnet is provided in an outer peripheral portion of the rotor. The stator core includes an annular yoke portion, a plurality of teeth extended radially from an inner periphery of the yoke portion, and a plurality of slots for accommodating a wire to be wound around the teeth at both ends in a circumferential direction of the teeth. A number of the slots in the stator core is set to be 18, the permanent magnet of the rotor is formed by a ferrite magnet, and a number of poles of the permanent magnet is set to be 12.
    Type: Application
    Filed: March 24, 2011
    Publication date: October 6, 2011
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Takushi FUJIOKA, Yoichi TANABE, Takuya HAMANO, Shingo SUZUKI, Shinichiro KATAGIRI
  • Patent number: 7986064
    Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: July 26, 2011
    Assignee: Fujitsu General Limited
    Inventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima
  • Patent number: 7714478
    Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: May 11, 2010
    Assignees: Nissan Motor Co., Ltd., Fujitsu General Limited
    Inventors: Yuichi Shibukawa, Kenta Suzuki, Kenji Narita, Takashi Suzuki, Takushi Fujioka, Tomonori Kojima, Masanori Murakami, Yoichi Tanabe, Masaki Yamada
  • Publication number: 20090284096
    Abstract: There is provided an electrical motor in which the dimensional accuracy of a stator is increased more easily, and the influence exerted on a magnetic circuit is kept as little as possible. In an electrical motor in which the stator 3 formed with n number (n is a positive integer) of teeth 33 in a row in a straight line form is bent into an annular shape and the end parts thereof are connected to each other, the sum of opening angles ? of a cutout 35 formed between segments of the stator 3 is made larger than 360 degrees, and a minute clearance is formed between the opposed surfaces of the cutout 35 when the stator is bent into an annular shape.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 19, 2009
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Shinichiro Katagiri, Hiroaki Shibukawa, Takuya Hamano, Hirokazu Matsuzaki, Toshihiko Yamada, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada, Hidetaka Terakubo, Yoshitaka Kitajima
  • Publication number: 20070262674
    Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.
    Type: Application
    Filed: May 8, 2007
    Publication date: November 15, 2007
    Inventors: Yuichi Shibukawa, Kenta Suzuki, Kenji Narita, Takashi Suzuki, Takushi Fujioka, Tomonori Kojima, Masanori Murakami, Yoichi Tanabe, Masaki Yamada
  • Patent number: 7221073
    Abstract: An axial gap electronic motor includes a stator and a rotor disposed opposingly with a predetermined gap. In order to provide an easy assembling operation of the stator, the stator includes a plurality of pole members annularly connectable. The annular stator core is obtained by connecting each of the pole members to which coil winding is previously applied.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: May 22, 2007
    Assignee: Fujitsu General Limited
    Inventors: Shinichi Yamada, Hisao Igarashi, Tomonori Kojima, Takayuki Shinohara, Hidetaka Terakubo, Tomohiro Kashiwagi, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada
  • Patent number: 7135800
    Abstract: An axial gap electronic motor includes a stator having a plurality of poles, and a rotor. Each pole is formed of a stator iron core made of a magnet body and a coil wound therearound. The rotor has a plurality of poles formed of permanent magnet and arranged along a rotation axis direction of said rotor with a predetermined gap provided therebetween. The stator has a magnetic force generating section in which a plurality of the stator iron cores is arranged in a ring shape on a concentric circle with the rotation axis line of the rotor being a center axis. Each of teeth of the stator iron core is provided with a skew.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: November 14, 2006
    Assignee: Fujitsu General Limited
    Inventors: Masaki Yamada, Hisao Igarashi, Kenji Narita, Takushi Fujioka, Tomonori Kojima, Shinichiro Katagiri, Shinichi Yamada, Yoichi Tanabe, Hidetaka Terakubo, Takayuki Shinohara
  • Publication number: 20050140244
    Abstract: There is provided an axial gap electronic motor capable of decreasing cogging torque and thus decreasing vibrations and noise. A stator of the motor has a magnetic force generating section 21 in which a plurality of stator iron cores 24 are arranged in a ring shape, and teeth 25 of each of the stator iron cores 24 are provided with a skew 26 inclined through a predetermined angle with respect to the radial direction of the rotors 31, 32.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 30, 2005
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Masaki Yamada, Hisao Igarashi, Kenji Narita, Takushi Fujioka, Tomonori Kojima, Shinichiro Katagiri, Shinichi Yamada, Yoichi Tanabe, Hidetaka Terakubo, Takayuki Shinohara
  • Publication number: 20050140233
    Abstract: There is provided, at a low cost, an air blower apparatus capable of increasing the air blowing capability without an increase in size of an electronic motor, and having a high assembling ability. An electronic motor 3 is an axial gap electronic motor in which a rotor 32 and a stator 31 of the electronic motor are arranged opposedly with a predetermined gap along the rotation axis direction of the rotor, and coaxially supports an air blowing fan 2 on an attaching surface of the rotor 32 opposite to the stator.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 30, 2005
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Tomonori Kojima, Hisao Igarashi, Takushi Fujioka, Yoichi Tanabe, Hidetaka Terakubo, Takayuki Shinohara, Tomohiro Kashiwagi, Masaki Yamada
  • Patent number: 6819026
    Abstract: A radial-air-gap induction motor is constituted so as to have two air gaps by setting a rotor between a cylindrical outer stator and inner stator in order to improve an efficiency by increasing the ratio of torque/(square of current) by a two air gaps, apply windings for generating a rotating magnetic field to the outer and inner stators, and form squirrel-cage windings on the rotor.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: November 16, 2004
    Assignee: Fujitsu General Limited
    Inventors: Kenji Narita, Takushi Fujioka, Yusuke Kikuchi, Akihiro Ito, Youichi Tanabe, Yuji Souma, Ken Maeyama, Michihiro Shibamoto, Nopporn Jirojjaturonn, Chanaporn Thanathitipong
  • Patent number: 6809453
    Abstract: In an axial-air-gap induction motor which has a disk-shaped stator and rotor placed coaxially around a rotating shaft with their surfaces opposing each other across a predetermined gap, the stator and rotor are each composed of a disk-shaped yoke and teeth fitted and secured in the yoke, making it easy to fasten the stator to the bracket, and the rotor to the rotating shaft, as well as to mount windings in the stator core and rotor core.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: October 26, 2004
    Assignee: Fujitsu General Limited
    Inventors: Kenji Narita, Takushi Fujioka, Youichi Tanabe, Nopporn Jirojjaturonn, Chanaporn Thanathitipong, Akihiro Ito, Michihiro Shibamoto
  • Publication number: 20040164641
    Abstract: In order to make it possible to perform an assembling operation of a stator of an axial gap electronic motor, including a connecting wire settlement and the like, a stator core 5 includes a plurality of pole members 5a to 5l annularly connectable, and the annular stator core 5 is obtained by connecting each of the pole members 5a to 5l to which coil winding is previously applied.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 26, 2004
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Shinichi Yamada, Hisao Igarashi, Tomonori Kojima, Takayuki Shinohara, Hidetaka Terakubo, Tomohiro Kashiwagi, Takushi Fujioka, Yoichi Tanabe, Masaki Yamada
  • Publication number: 20040061396
    Abstract: In an axial-air-gap induction motor which has a disk-shaped stator and rotor placed coaxially around a rotating shaft with their surfaces opposing each other across a predetermined gap, the stator and rotor are each composed of a disk-shaped yoke and teeth fitted and secured in the yoke, making it easy to fasten the stator to the bracket, and the rotor to the rotating shaft, as well as to mount windings in the stator core and rotor core.
    Type: Application
    Filed: July 10, 2003
    Publication date: April 1, 2004
    Applicant: Fujitsu General Limited
    Inventors: Kenji Narita, Takushi Fujioka, Youichi Tanabe, Nopporn Jirojjaturonn, Chanaporn Thanathitipong, Akihiro Ito, Michihiro Shibamoto
  • Publication number: 20030201686
    Abstract: A radial-air-gap induction motor is constituted so as to have a tow-layer air gap by setting a rotor between a cylindrical outer stator and inner stator in order to improve an efficiency by increasing the ratio of torque/(square of current) by a two-layer air-gap structure, apply a winding for generating a rotating magnetic field to the outer and inner stators, and form a squirrel-cage winding on the rotor.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 30, 2003
    Applicant: FUJITSU GENERAL LIMITED
    Inventors: Kenji Narita, Takushi Fujioka, Yusuke Kikuchi, Akihiro Ito, Youichi Tanabe, Yuji Souma, Ken Maeyama, Michihiro Shibamoto, Nopporn Jirojjaturonn, Chanaporn Thanathitipong