Patents by Inventor Youichi Nakahara

Youichi Nakahara 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).

  • Permanent magnet type rotor and method of manufacturing the rotor
    Patent number: 7151334
    Abstract: A permanent magnet type rotor comprises an inner member 2 having an outer ring portion 21; an approximately annular outer member 1 having soft magnetism and an inner circumference contacting with an outer circumference of the outer ring portion; and plural permanent magnets 3 disposed at equal intervals on the outer circumference of the outer member toward the circumferential direction. At least one of the inner member 2 and the outer member 1 is made from a sintered material, and the inner member 2 and the outer member 1 are mutually sintered and bonded. Thickness and weight of a dynamotor itself can be reduced and high output and high efficiency can be achieved.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: December 19, 2006
    Assignees: Hitachi Powdered Metals Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kazuo Asaka, Tomoaki Arakawa, Tsuyoshi Kagaya, Satoru Shinzaki, Hiromitsu Sato, Kenji Fukuda, Hirohisa Ogawa, Tatsuro Horie, Akihiro Okamura, Katsuaki Sato, Toshiyasu Komatsu, Youichi Nakahara
  • Parallel linkage and artificial joint device using the same
    Patent number: 7118601
    Abstract: There are provided an artificial joint device that can realize an artificial limb enabling twisting motion without a drive source, and when with the drive source, reduce the size and costs of the device, and a parallel linkage that can realize the device. The linkage connects a foot portion and a mounting plate spaced from each other. A fixed link has one end fixed to the plate, and the other end connected to the foot portion via a ball joint, making the angle of the fixed link relative to the foot portion changeable in any direction. Expansible links extend between the foot portion and the plate in an expansible/contractible manner and each have opposite ends connected to the plate and the foot portion via respective upper and lower ball joints, making respective angles thereof relative to the foot portion and the plate changeable in any direction.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: October 10, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yuji Yasui, Hiroshi Kiyomoto, Isao Usukura, Youichi Nakahara, Haruyuki Iwasaki, Shungo Umeda, Kazunori Yamamoto, Masamitsu Shiono, Kazuo Okada, Manabu Nakayama, Atsushi Kubo
  • Permanent magnet type rotor and method of manufacturing the rotor
    Publication number: 20040025323
    Abstract: A permanent magnet type rotor comprises an inner member 2 having an outer ring portion 21; an approximately annular outer member 1 having soft magnetism and an inner circumference contacting with an outer circumference of the outer ring portion; and plural permanent magnets 3 disposed at equal intervals on the outer circumference of the outer member toward the circumferential direction. At least one of the inner member 2 and the outer member 1 is made from a sintered material, and the inner member 2 and the outer member 1 are mutually sintered and bonded. Thickness and weight of a dynamotor itself can be reduced and high output and high efficiency can be achieved.
    Type: Application
    Filed: June 3, 2003
    Publication date: February 12, 2004
    Inventors: Kazuo Asaka, Tomoaki Arakawa, Tsuyoshi Kagaya, Satoru Shinzaki, Hiromitsu Sato, Kenji Fukuda, Hirohisa Ogawa, Tatsuro Horie, Akihiro Okamura, Katsuaki Sato, Toshiyasu Komatsu, Youichi Nakahara
  • Parallel linkage and artificial joint device using the same
    Publication number: 20030163206
    Abstract: There are provided an artificial joint device that can realize an artificial limb enabling twisting motion without a drive source, and when with the drive source, reduce the size and costs of the device, and a parallel linkage that can realize the device. The linkage connects a foot portion and a mounting plate spaced from each other. A fixed link has one end fixed to the plate, and the other end connected to the foot portion via a ball joint, making the angle of the fixed link relative to the foot portion changeable in any direction. Expansible links extend between the foot portion and the plate in an expansible/contractible manner and each have opposite ends connected to the plate and the foot portion via respective upper and lower ball joints, making respective angles thereof relative to the foot portion and the plate changeable in any direction.
    Type: Application
    Filed: February 28, 2003
    Publication date: August 28, 2003
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Yuji Yasui, Hiroshi Kiyomoto, Isao Usukura, Youichi Nakahara, Haruyuki Iwasaki, Shungo Umeda, Kazunori Yamamoto, Masamitsu Shiono, Kazuo Okada, Manabu Nakayama, Atsushi Kubo