Patents by Inventor Tadashi Fukuishi

Tadashi Fukuishi 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).

  • Scroll type compressor and refrigeration cycle using the same
    Patent number: 5211031
    Abstract: A scroll type compressor having a pair of scroll type compression units which are encased in the same casing so as to make a common use of a lubricating oil reservoir provided in the casing, wherein the compression units have compression elements, drive shafts, driving motors and other components which are of the same constructions and specifications, and wherein each of the compression units are adapted to be driven selectively by commercial electrical power or through a frequency-variable inverter so as to operate at different speeds. Since both compression units can be made up from the same components such as the compression elements, loads in the production, service and administration, are greatly reduced contributing to a reduction in the labor and cost, while eliminating any mounting error.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: May 18, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Akira Murayama, Tadashi Fukuishi, Sigeaki Kuroda, Toshiaki Koyama, Tadao Ochiai, Toshio Hirai, Shintaro Sado, Yasushi Izunaga, Shouji Kikuchi, Fumio Yoshinaga