Patents by Inventor Kiyoharu Kyutoku

Kiyoharu Kyutoku 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).

  • Rotary compressor and method of manufacturing the same
    Patent number: 6413061
    Abstract: A rotary compressor comprises a cylinder having an inner space and a groove, a roller sliding along the inside of the inner space of the cylinder, a vane penetrating through the groove, and refrigerant. The groove penetrates through the outside and inner space of the cylinder. The vane slides on the roller, and the vane also slides in and out of the groove. The vane includes stainless steel formed by sintering of powder material, a nitrogen diffusion layer disposed on the surface of the stainless steel, and a compound layer of iron and nitrogen disposed on the surface of the nitrogen diffusion layer. The stainless steel has a plurality of fine pores formed by sintering of powder material. The plurality of fine pores have a porosity of 15% or less.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: July 2, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mototaka Esumi, Kiyoharu Kyutoku