Patents by Inventor Zenkichi Yamanaka

Zenkichi Yamanaka 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).

  • Dipping type optical fiber radiation thermometer for molten metal thermometry and thermometry method for molten metal
    Publication number: 20030002560
    Abstract: Dipping type optical fiber radiation thermometer for measuring temperature of molten metal, which comprises:
    Type: Application
    Filed: July 15, 2002
    Publication date: January 2, 2003
    Inventors: Zenkichi Yamanaka, Yoshiaki Narishige, Kazuhiro Oe, Kazuo Nomura
  • Temperature measuring device
    Patent number: 6004031
    Abstract: A temperature measuring device includes an optical fiber, a metallic protective tube covering the optical fiber, and a heat insulation coating covering the metallic protective tube such that the optical fiber is covered with the metallic protective tube and the heat insulation coating to form a double-covered optical fiber. The heat insulation coating contains carbon particles as an additive. In addition, a radiation thermometer is connected to the double-covered optical fiber, and a tip of the double-covered optical fiber forms a temperature measuring element for collecting and transmitting radiation to the radiation thermometer.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: December 21, 1999
    Assignee: NKK Corporation
    Inventors: Takamitsu Takayama, Zenkichi Yamanaka, Yoshiro Yamada, Yasushi Kaneda