Patents by Inventor Masanobu Asami

Masanobu Asami 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).

  • Surge absorber and production method thereof
    Patent number: 6731490
    Abstract: The invention relates to a surge absorber provided with; a surge absorber element composed of a columnar non-conductive member and a conductive film formed dividedly via a discharge gap on a peripheral surface of the non-conductive member, a pair of sealing electrodes disposed at opposite ends of the surge absorber element and touching the conductive film, and a glass tube with opposite ends closed by the sealing electrodes, and the surge absorber element and an inert gas encapsulated thereinside. In the surge absorber of the invention, a face of each sealing electrode which contacts with the surge absorber element is formed in a concave shape symmetrical with a central axis of the glass tube. As a result the surge absorber element can be positioned in the center of the glass tube with high accuracy, the life span and the surge current capacity of the surge absorber can be improved, and low cost and small size becomes possible.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: May 4, 2004
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hiroyuki Ikeda, Takahiro Nakamoto, Masanobu Asami
  • Surge absorber and production method thereof
    Publication number: 20020041477
    Abstract: The invention relates to a surge absorber provided with; a surge absorber element composed of a columnar non-conductive member and a conductive film formed dividedly via a discharge gap on a peripheral surface of the non-conductive member, a pair of sealing electrodes disposed at opposite ends of the surge absorber element and touching the conductive film, and a glass tube with opposite ends closed by the sealing electrodes, and the surge absorber element and an inert gas encapsulated thereinside. In the surge absorber of the invention, a face of each sealing electrode which contacts with the surge absorber element is formed in a concave shape symmetrical with a central axis of the glass tube. As a result the surge absorber element can be positioned in the center of the glass tube with high accuracy, the life span and the surge current capacity of the surge absorber can be improved, and low cost and small size becomes possible.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 11, 2002
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Hiroyuk Ikeda, Takahiro Nakamoto, Masanobu Asami