Patents by Inventor Hiroaki Itahashi

Hiroaki Itahashi 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).

  • Stepping motor
    Patent number: 8288900
    Abstract: A stepping motor includes a rotor assembly and a stator assembly including two stator units axially coupled to each other. The two stator units each include a pair of yokes which each include a base portion and a plurality of pole teeth extending from the base portion and which are disposed such that each of the pole teeth of one yoke and each of the pole teeth of the other yoke are arranged alternately in the circumferential direction. The pole teeth are shaped symmetric and each include a pair of slant sides inclined so as to become closer to each other with an increase of distance from the base portion, and the slant sides of adjacent pole teeth are located close to each other wherein a magnetic pole gap between the adjacent pole teeth pole teeth is about 0.2 times as large as the thickness of the pole teeth.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: October 16, 2012
    Assignee: Minebea Co., Ltd.
    Inventors: Takeshi Matsuno, Yoshiya Yamamura, Hiroaki Itahashi, Shigeki Miyaji, Yukihiro Terada
  • STEPPING MOTOR
    Publication number: 20110043074
    Abstract: A stepping motor includes a rotor assembly and a stator assembly including two stator units axially coupled to each other. The two stator units each include a pair of yokes which each include a base portion and a plurality of pole teeth extending from the base portion and which are disposed such that each of the pole teeth of one yoke and each of the pole teeth of the other yoke are arranged alternately in the circumferential direction. The pole teeth are shaped symmetric and each include a pair of slant sides inclined so as to become closer to each other with an increase of distance from the base portion, and the slant sides of adjacent pole teeth are located close to each other wherein a magnetic pole gap between the adjacent pole teeth pole teeth is about 0.2 times as large as the thickness of the pole teeth.
    Type: Application
    Filed: July 28, 2010
    Publication date: February 24, 2011
    Applicant: MINEBEA CO., LTD.
    Inventors: Takeshi MATSUNO, Yoshiya YAMAMURA, Hiroaki ITAHASHI, Shigeki MIYAJI, Yukihiro TERADA