Patents by Inventor Mitsuo Kawabata

Mitsuo Kawabata 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).

  • Patent number: 7948135
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: May 24, 2011
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Publication number: 20100019587
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Application
    Filed: October 6, 2009
    Publication date: January 28, 2010
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji SATO, Mitsuo Kawabata, Takehisa Minowa
  • Patent number: 7618496
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: November 17, 2009
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Publication number: 20070171017
    Abstract: A radially anisotropic ring magnet endowed with good magnetic characteristics and having throughout the magnet an angle of 80 to 100° between a center axis thereof and a radial anisotropy imparting direction is manufactured by a pressing operation.
    Type: Application
    Filed: February 27, 2007
    Publication date: July 26, 2007
    Inventors: Koji SATO, Mitsuo Kawabata, Takehisa Minowa
  • Patent number: 7201809
    Abstract: A radially anisotropic ring magnet endowed with good magnetic characteristics and having throughout the magnet an angle of 80 to 100° between a center axis thereof and a radial anisotropy imparting direction is manufactured by a pressing operation.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: April 10, 2007
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Publication number: 20060022782
    Abstract: A radially anisotropic ring magnet endowed with good magnetic characteristics and having throughout the magnet an angle of 80 to 1000 between a center axis thereof and a radial anisotropy imparting direction is manufactured by a pressing operation.
    Type: Application
    Filed: August 27, 2003
    Publication date: February 2, 2006
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Publication number: 20060024192
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Application
    Filed: September 20, 2005
    Publication date: February 2, 2006
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Patent number: 6984270
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: January 10, 2006
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa
  • Publication number: 20030118467
    Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.
    Type: Application
    Filed: October 31, 2002
    Publication date: June 26, 2003
    Inventors: Koji Sato, Mitsuo Kawabata, Takehisa Minowa