Patents by Inventor Toshifumi Akai

Toshifumi Akai 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).

  • Capacitor having a fuse and a weak member
    Patent number: 5680290
    Abstract: A capacitor has a capacitor element including a metallized film and a case for hermetically containing the capacitor element. The capacitor element has a protective mechanism for protecting it against insulation breakdown at overvoltage or thermorunaway. The capacitor also has a safety device for keeping the capacitor safe at high internal pressure due to heating. Thus, the protective mechanism and the safety device operate surely, the capacitor is protected under various severe conditions, and the life of the capacitor becomes longer.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: October 21, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshifumi Akai, Yutaka Tanaka, Toshiyuki Nishimori, Hidekazu Wada