Patents by Inventor Kunio Hashiba

Kunio Hashiba 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).

  • Water treatment method and water treatment device
    Patent number: 7018546
    Abstract: Embodiments of the invention provide a water treatment method and water treatment device capable of automatically tracking the frequency of ultrasonic waves and automatically controlling their amplitude such that optimal cavitation is generated. In one embodiment, a water treatment method of sterilizing water containing microbes comprises supplying ultrasonic vibration to the water to be treated by driving and controlling a transducer of a sterilization cell using a signal; detecting an amplitude of the transducer and a frequency of the signal applied to the transducer; and controlling the amplitude and a vibration frequency of the transducer to target values in accordance with the detected transducer amplitude and the detected signal frequency.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: March 28, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Kurihara, Kazuo Takei, Kunio Hashiba, Kageyoshi Katakura
  • Water treatment method and water treatment device
    Publication number: 20040173541
    Abstract: Embodiments of the invention provide a water treatment method and water treatment device capable of automatically tracking the frequency of ultrasonic waves and automatically controlling their amplitude such that optimal cavitation is generated. In one embodiment, a water treatment method of sterilizing water containing microbes comprises supplying ultrasonic vibration to the water to be treated by driving and controlling a transducer of a sterilization cell using a signal; detecting an amplitude of the transducer and a frequency of the signal applied to the transducer; and controlling the amplitude and a vibration frequency of the transducer to target values in accordance with the detected transducer amplitude and the detected signal frequency.
    Type: Application
    Filed: January 8, 2004
    Publication date: September 9, 2004
    Applicant: HITACHI, LTD.
    Inventors: Masahiro Kurihara, Kazuo Takei, Kunio Hashiba, Kageyoshi Katakura