Patents by Inventor Keiichi Yoda

Keiichi Yoda 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).

  • Patent number: 4080268
    Abstract: A method for the high speed chromium plating of piston rings, cylinder liners and the like wherein the cathodic workpiece is rotated at a peripheral speed of 1-4 m/sec. relative to a concentrically disposed anode. The latter may comprise a single spoked member or a plurality of rectangular pieces to thereby create a turbulence in the electrolyte bath. When a cylindrical anode is used, a bladed agitator is secured to the rotating workpiece to generate turbulence. The interelectrode spacing is from 0.1 to 4t cm with a multipolar anode, where t is the thickness of an anode pole. The current density is from 200 - 600 amps/dm.sup.2, and the bath temperature is from 20.degree. - 50.degree. C or from 65.degree. - 80.degree. C, depending on the plating characteristics desired.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: March 21, 1978
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Shoji Suzuki, Keiichi Yoda, Hiroshi Suzuki, Isao Yaguchi, Hitoshi Karasawa