Patents by Inventor Yoshiki Kawachi

Yoshiki Kawachi 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 of grinding a workpiece having plural cylindrical portions with plural grinding wheels
    Patent number: 5355633
    Abstract: A method of grinding plural journal portions of a workpiece with plural grinding wheels. In the method, a pair of work rests are used to support two selected journal portions, and the selected two journal portions have a larger initial diameter as compared with the rest of the journal portions. Initially, the selected journal portions are ground without using the work rests. When the diameter of the selected journal portions becomes substantially equal to the diameters of the rest of the journal portions, the work rests are advanced to support the selected journal portions. After that, the grinding wheels are again advanced to grind all the journal portions.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: October 18, 1994
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventors: Toshio Ishikawa, Masahiko Yokoi, Shozo Kobayashi, Hisashi Kubota, Yoshiki Kawachi
  • Reinforced electrolyte function elements
    Patent number: 5110442
    Abstract: A zirconia-base solid electrolyte function element comprising a zirconia-base solid electrolyte substrate, wherein a reinforcing layer is formed directly on each side of said zirconia-base solid electrolyte substrate, the ratio of the shrinkage modulus to the zirconia-base electrolyte substrate to the reinforcing layers is 1.01 to 1.08, and the substrate and the reinforcing layers have been sintered simultaneously.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: May 5, 1992
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takao Kojima, Hiroyuki Ishiguro, Yoshiki Kawachi, Tetsusyo Yamada
  • Plate-like ceramic heater
    Patent number: 4806739
    Abstract: A heater including an electron-conductive pattern designed to generate heat, which has a partially and/or entirely stabilized ZrO.sub.2 -base substrate, an Al.sub.2 O.sub.3 -base coating layer disposed on the surface of the substrate, and an electron-conductive pattern to generate heat disposed on the coating layer.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: February 21, 1989
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takao Kojima, Hiroyuki Ishiguro, Yoshiki Kawachi, Tetsusyo Yamada