Patents by Inventor Toshifumi Kunugi

Toshifumi Kunugi 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).

  • Absorption refrigerator
    Patent number: 5048308
    Abstract: An absorber comprises a vapor absorption portion including at least two flow paths through which an absorption solution flows down and absorbs a cooling medium vapor, at least two solution cooling portions separated from, and juxtaposed with, the vapor absorption portion and solution circulation for circulating a cooling medium vapor between the solution cooling portion and the vapor absorption portion. In this manner, a refrigerator can be made compact in size and cycle efficiency can be improved.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: September 17, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Hisajima, Tomihisa Ohuchi, Seiichiro Sakaguchi, Toshifumi Kunugi, Michihiko Aizawa