Patents by Inventor Toshikazu Hayakawa

Toshikazu Hayakawa 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).

  • Method and apparatus for surface treatment of inner surface of member
    Patent number: 6688949
    Abstract: The present invention provides a method and an apparatus for surface treatment to polish and wash with high accuracy the inner surface of a member having complicated internal configuration. A magnet 23 is arranged on outer side of a member 1, which is made of a nonmagnetic material and for which surface treatment is to be performed on inner surface. Magnetic grains and abrasive grains in slurry state are supplied to inner surface of the member. At least one of the member 1 and the magnet 23 is rotated and are relatively moved in axial direction at the same time.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: February 10, 2004
    Assignee: Kyoei Denko Co., Ltd.
    Inventors: Yoshinori Shinbo, Koichi Saito, Toshikazu Hayakawa
  • Method and apparatus for surface treatment of inner surface of member
    Publication number: 20020119738
    Abstract: The present invention provides a method and an apparatus for surface treatment to polish and wash with high accuracy the inner surface of a member having complicated internal configuration.
    Type: Application
    Filed: November 21, 2001
    Publication date: August 29, 2002
    Applicant: Kyoei Denko Co., Ltd.
    Inventors: Yoshinori Shinbo, Koichi Saito, Toshikazu Hayakawa