Patents by Inventor Michinosuke Demizu

Michinosuke Demizu 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).

  • Electrode composition for vacuum switch
    Patent number: 4537743
    Abstract: The disclosed electrode composition for a vacuum switch comprises copper, as a principal ingredient, a low melting point metal such as Bi, Pb, In, Li, Sn or any of their alloys, in a content not exceeding 20% by weight, a first additional metal such as Te, Sb, La, Mg or any of their alloys and a refractory metal such as Cr, Fe, Co, Ni, Ti, W or any of their alloys in a content less than 40% by weight.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: August 27, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Yamanaka, Yasushi Takeya, Mitsumasa Yorita, Toshiaki Horiuchi, Kouichi Inagaki, Eizo Naya, Michinosuke Demizu, Mitsuhiro Okumura
  • Contact material for vacuum circuit breaker
    Patent number: 4517033
    Abstract: A contact material for a vacuum circuit breaker consists essentially of copper as the basic component, and, as the other components, 35% by weight or below of chromium and 50% by weight or below of tantalum, the total quantity of chromium and tantalum in said contact material being 10% by weight and above.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: May 14, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuhiro Okumura, Eizo Naya, Michinosuke Demizu
  • Electrode composition for vacuum switch
    Patent number: 4499009
    Abstract: The disclosed electrode composition for a vacuum switch comprises copper, as a principal ingredient, a low melting point metal such as Bi, Pb, In, Li, Sn or any of their alloys, in a content not exceeding 20% by weight, a first additional metal such as Te, Sb, La, Mg or any of their alloys and a refractory metal such as Cr, Fe, Co, Ni, Ti, W or any of their alloys in a content less than 40% by weight.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: February 12, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Yamanaka, Yasushi Takeya, Mitsumasa Yorita, Toshiaki Horiuchi, Kouichi Inagaki, Eizo Naya, Michinosuke Demizu, Mitsuhiro Okumura
  • Contact for vacuum circuit breaker
    Patent number: 4486631
    Abstract: A contact for a vacuum circuit breaker is disclosed which contains copper as a first component and also at least two elements of the group of chromium, molybdenum, and tungsten as the other components. Each of these other components is contained in an amount not greater than 40% by weight.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: December 4, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Eizo Naya, Toshiaki Horiuchi, Yasushi Takeya, Kouichi Inagaki, Michinosuke Demizu, Mitsuhiro Okumura
  • Contactor for vacuum type circuit interrupter
    Patent number: 4424429
    Abstract: A contactor for a vacuum type circuit interrupter having a pair of detachable electrodes in a vacuum chamber comprises an electrode obtained by melting or sintering a composition of an electric conductive metal of copper or silver as a main component and at least one metal oxide having a melting point lower than that of said conductive metal of bismuth oxide, thallium oxide, indium oxide, antimony oxide or tellurium oxide as an additive, in vacuum or a reduced atmosphere or a nonoxidative atmosphere.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: January 3, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Yamanaka, Kouichi Inagaki, Eizo Naya, Michinosuke Demizu, Mitsuhiro Okumura