Patents by Inventor Junji Wakikawa

Junji Wakikawa 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).

  • Heating apparatus having refrigeration cycle
    Patent number: 6405551
    Abstract: A heating apparatus having a refrigeration cycle includes a compressor, a condenser and an evaporator. The heating apparatus has a first heat exchanger and a second heat exchanger, where the first heat exchanger is selected as a heat source, and the second heat exchanger is selected as either a cooling or heating source. The first heat exchanger and the second heat exchanger are connected in series with each other in a refrigerant circuit. A heating medium is circulated in a heat transfer device which is connected to the first heat exchanger. Bathwater of a bathtub and water of a hot-water storage tank are heated through the heat transfer device indirectly by the first heat exchanger.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: June 18, 2002
    Assignee: Science, Inc.
    Inventors: Katumi Kuwabara, Junji Wakikawa, Mitiyuki Takahashi, Akihiro Kobayashi