Patents by Inventor Hiroyuki Hiyoshi

Hiroyuki Hiyoshi 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).

  • Discharge circuit for pulsed laser and pulsed power source
    Patent number: 6389049
    Abstract: A discharge circuit for pulsed laser comprising a power source, main discharge electrodes for generating a laser beam, a main discharge capacitor charged with electrical charges for generating the main discharge between the main discharge electrodes, and a switching circuit for performing switching operations to charge the main discharge capacitor with electrical charges supplied from the power source in a prescribed repetition cycle, is provided, in parallel to the main discharge capacitors, with a circuit element for consuming or grounding the reverse current from the power source caused by overshoot generated directly after the main discharge, thereby attaining stable laser output without ill effects from overshoot voltage generated directly following discharge.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: May 14, 2002
    Assignees: Komatsu Ltd., Kabushiki Kaisha Meidensha
    Inventors: Daisuke Yoshida, Toshihiro Nishisaka, Yuichi Takabayashi, Takashi Matsunaga, Hisashi Yanase, Tadao Shibuya, Yasuo Kataoka, Masayuki Tani, Eiji Sasamoto, Hiroyuki Hiyoshi, Kiyoshi Hara
  • DISCHARGE CIRCUIT FOR PULSED LASER AND PULSED POWER SOURCE
    Publication number: 20020003820
    Abstract: A discharge circuit for pulsed laser comprising a power source, main discharge electrodes for generating a laser beam, a main discharge capacitor charged with electrical charges for generating the main discharge between the main discharge electrodes, and a switching circuit for performing switching operations to charge the main discharge capacitor with electrical charges supplied from the power source in a prescribed repetition cycle, is provided, in parallel to the main discharge capacitors, with a circuit element for consuming or grounding the reverse current from the power source caused by overshoot generated directly after the main discharge, thereby attaining stable laser output without ill effects from overshoot voltage generated directly following discharge.
    Type: Application
    Filed: October 5, 1998
    Publication date: January 10, 2002
    Inventors: DAISUKE YOSHIDA, TOSHIHIRO NISHISAKA, YUICHI TAKABAYASHI, TAKASHI MATSUNAGA, HISASHI YANASE, TADAO SHIBUYA, YASUO KATAOKA, MASAYUKI TANI, EIJI SASAMOTO, HIROYUKI HIYOSHI, KIYOSHI HARA