Patents by Inventor Haruhiko Sudo

Haruhiko Sudo 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).

  • Defrosting control unit for showcases
    Patent number: 5379608
    Abstract: A defrosting control unit for providing centralized control of the defrosting a showcase having showcase units with defrosting devices includes an environmental informer ion signal generation portion and a defrosting control portion. The signal generation portion generates a signal reflecting at least one environmental parameter such as whether it is daytime or nighttime, the difference in air temperature measured at different places in a showcase unit, the deviation of the temperature difference with respect to a steady-state value, and the temporal variation of the deviation. The defrosting control portion receives the environmental information signal from the signal generation portion and sends a defrosting start signal and a defrosting end signal to the defrosting devices at a time interval . The signal generation portion may include a fuzzy reasoning portion, membership functions, and rules so that an inference on the optimal time for starting a defrosting operation can be made.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: January 10, 1995
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Keiichi Ishimaru, Osamu Itoh, Tomoyoshi Nakatani, Haruhiko Sudo, Masaya Kurita