Patents by Inventor Akirhiro Takada

Akirhiro Takada 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).

  • Heater control system
    Patent number: 5079409
    Abstract: A heater control system has a phase control circuit coupled between a power supply and a heater to control the phase of current to be supplied to the heater. A short circuit device is connected to short circuit the phase control circuit to allow current from the power supply to flow directly to the heater. A control circuit allows the phase control circuit to operate for a predetermined time after the power supply is turned on, and after the elapse of this predetermined time, shorts the phase control circuit with the short circuit device. In a modification, the phase control circuit may be normally inactive, and be energized to reduce current to the heater when the power supply is being drained by another device.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: January 7, 1992
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Akirhiro Takada, Kunihiro Onishi, Yoshihiro Nakajima