Patents by Inventor Norimasa Takata

Norimasa Takata 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).

  • Spindle motor and method for assembling the same
    Patent number: 6717310
    Abstract: A downsized spindle motor having a longer bearing service life and enhanced shock resistance includes a flange 11, which bears an axial load of a shaft 8, and which is fixed to an end of shaft 8. Laser welded section 14 is provided at the fixed section between shaft 8 and flange 11. Rotor hub 50 is fixed to another end of shaft 8, and laser welded section 54 firmly bonds the two elements.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: April 6, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Shoichi Yoshikawa, Takao Yoshitsugu, Norimasa Takata
  • Brushless motor and production method therefor
    Patent number: 6700256
    Abstract: In a brushless motor, a projected annular portion is formed in a central portion of a rotor frame and the projected annular portion has a bore that includes a small-bore portion and a large-bore portion. A length L1 of the small-bore portion is in a range of D×0.05≦L1≦D×0.20, where D represents the diameter of the shaft. An axial length L2 of the projected annular portion is arranged to satisfy L2≧L1×2. Thus, the brushless motor realizes a small and thin construction and has a high deflection precision as well as high productivity.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: March 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideshi Fukutani, Hiroshi Ikeno, Norimasa Takata
  • Spindle motor and method of assembling the same
    Publication number: 20020185925
    Abstract: A downsized spindle motor having a longer service life of a bearing and enhanced shock resistance is provided. Flange 11, which bears an axial load of shaft 8, is fixed to an end of shaft 8. Laser welded section 14 is provided to the fixed section between shaft 8 and flange 11. Rotor hub 50 is fixed to another end of shaft 8, and laser welded section 54 firmly bonds the two elements.
    Type: Application
    Filed: May 23, 2002
    Publication date: December 12, 2002
    Inventors: Shoichi Yoshikawa, Takao Yoshitsugu, Norimasa Takata
  • Brushless motor and production method therefor
    Publication number: 20020084704
    Abstract: In a brushless motor, a projected annular portion is formed in a central portion of a rotor frame and the projected annular portion has a bore that includes a small-bore portion and a large-bore portion. A length L1 of the small-bore portion is in a range of D×0.05≦L1≦D×0.20, where D represents the diameter of the shaft. An axial length L2 of the projected annular portion is arranged to satisfy L2≧L1×2. Thus, the brushless motor realizes a small and thin construction and has a high deflection precision as well as high productivity.
    Type: Application
    Filed: October 23, 2001
    Publication date: July 4, 2002
    Inventors: Hideshi Fukutani, Hiroshi Ikeno, Norimasa Takata