Patents by Inventor Masao UMEHARA

Masao UMEHARA 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).

  • High frequency power supply device
    Patent number: 8674619
    Abstract: A high frequency power supply device includes a high frequency power generation unit configured to output a high frequency power to be supplied to a load and a control unit configured to detect a mean value of the high frequency power to control the high frequency power generation unit. A power change period detection unit detects a period of a level change of the high frequency power that is detected at an output side of the high frequency power generation unit due to a periodic change of a level of a high frequency power that is given to a load from another high frequency power supply device as a power change period TZ. A control period setting unit sets a control period TC to an appropriate value in accordance with the power change period TZ detected by the power change period detection unit.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: March 18, 2014
    Assignee: Daihen Corporation
    Inventors: Yuya Nakamori, Tatsuya Ikenari, Daisuke Maehara, Masao Umehara, Satoru Hamaishi
  • HIGH FREQUENCY POWER SUPPLY DEVICE
    Publication number: 20130082620
    Abstract: A high frequency power supply device includes a high frequency power generation unit configured to output a high frequency power to be supplied to a load and a control unit configured to detect a mean value of the high frequency power to control the high frequency power generation unit. A power change period detection unit detects a period of a level change of the high frequency power that is detected at an output side of the high frequency power generation unit due to a periodic change of a level of a high frequency power that is given to a load from another high frequency power supply device as a power change period TZ. A control period setting unit sets a control period TC to an appropriate value in accordance with the power change period TZ detected by the power change period detection unit.
    Type: Application
    Filed: September 5, 2012
    Publication date: April 4, 2013
    Applicant: DAIHEN CORPORATION
    Inventors: Yuya NAKAMORI, Tatsuya IKENARI, Daisuke MAEHARA, Masao UMEHARA, Satoru HAMAISHI