Patents by Inventor NOBUYUKI FUSHIDA

NOBUYUKI FUSHIDA 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).

  • Heat source device for heating
    Patent number: 11262774
    Abstract: When a voltage signal is input to input terminals as a positive voltage, the voltage conversion circuit generates a control voltage proportional to an input voltage by a voltage-dividing circuit according to resistance elements, a voltage follower circuit according to an operational amplifier, and a voltage-dividing circuit according to resistance elements. When a voltage signal is input to the input terminals as a negative voltage, since the operational amplifier outputs a power supply voltage according to an input of the negative voltage, the voltage conversion circuit generates a predetermined positive voltage obtained by dividing the power supply voltage by the resistance elements as the control voltage. The predetermined positive voltage is higher than a voltage range of the control voltage when the voltage signal is input as the positive voltage.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: March 1, 2022
    Assignee: NORITZ CORPORATION
    Inventors: Keiichi Ikari, Masahiro Sugibayashi, Yoshifumi Atobe, Naoki Tsuda, Nobuyuki Fushida
  • HEAT SOURCE DEVICE FOR HEATING
    Publication number: 20190003742
    Abstract: When a voltage signal is input to input terminals as a positive voltage, the voltage conversion circuit generates a control voltage proportional to an input voltage by a voltage-dividing circuit according to resistance elements, a voltage follower circuit according to an operational amplifier, and a voltage-dividing circuit according to resistance elements. When a voltage signal is input to the input terminals as a negative voltage, since the operational amplifier outputs a power supply voltage according to an input of the negative voltage, the voltage conversion circuit generates a predetermined positive voltage obtained by dividing the power supply voltage by the resistance elements as the control voltage. The predetermined positive voltage is higher than a voltage range of the control voltage when the voltage signal is input as the positive voltage.
    Type: Application
    Filed: May 18, 2018
    Publication date: January 3, 2019
    Applicant: NORITZ CORPORATION
    Inventors: KEIICHI IKARI, MASAHIRO SUGIBAYASHI, YOSHIFUMI ATOBE, NAOKI TSUDA, NOBUYUKI FUSHIDA