Patents by Inventor Shuuji Mizutani

Shuuji Mizutani 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).

  • Rotating electrical machine and drive system of cage induction motor
    Patent number: 7129613
    Abstract: A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: October 31, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Nishihama, Kazumasa Ide, Tetsuo Fujigaki, Shuuji Mizutani, Takeshi Nakayama
  • Rotating electrical machine and drive system of cage induction motor
    Publication number: 20050156476
    Abstract: A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
    Type: Application
    Filed: March 9, 2005
    Publication date: July 21, 2005
    Inventors: Kazuo Nishihama, Kazumasa Ide, Tetsuo Fujigaki, Shuuji Mizutani, Takeshi Nakayama
  • Rotating electrical machine and drive system of cage induction motor
    Patent number: 6882078
    Abstract: A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: April 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Nishihama, Kazumasa Ide, Tetsuo Fujigaki, Shuuji Mizutani, Takeshi Nakayama
  • Rotating electrical machine and drive system of cage induction motor
    Publication number: 20040183390
    Abstract: A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
    Type: Application
    Filed: February 11, 2004
    Publication date: September 23, 2004
    Inventors: Kazuo Nishihama, Kazumasa Ide, Tetsuo Fujigaki, Shuuji Mizutani, Takeshi Nakayama