Patents by Inventor Kiyonobu Ito

Kiyonobu Ito 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).

  • Safety device for oil burner
    Patent number: 4710125
    Abstract: A safety device for an oil burner is disclosed which is capable of carrying out the detection of flame by means of a DC flame current obtained due to the rectification of flame to detect the abnormal combustion in the oil burner. The safety device includes a first flame electrode surrounded by flame of normal combustion in the oil burner and a second flame electrode arranged away from the flame and connected to an AC voltage source in a manner to be in parallel with the first flame electrode, so that the second flame electrodes cooperates with the first flame electrode to detect a failure in the flowing of a flame current through the first flame electrode or a decrease in a flame current flowing through the first flame electrode, to thereby determine any abnormal combustion in the oil burner.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: December 1, 1987
    Assignee: Toyotomi Kogyo Co., Ltd.
    Inventors: Kazuharu Nakamura, Motoki Matsumoto, Akinobu Kondo, Kiyonobu Ito