Patents by Inventor Hisashi Yanase

Hisashi Yanase 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).

  • 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
  • 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
  • Patent number: 5514918
    Abstract: A pulse generator is composed of switch means to switch supply of a first current through a circuit, a first condenser connected to the switch means in series and primary charged by the first current, voltage raising means having a primary winding serially connected to the first condenser and a secondary winding to obtain voltage output by the first current, magnetic switch means of current flow switchable having a primary winding serially connected to the secondary winding of the voltage raising means and a secondary winding, a second condenser connected to the secondary winding of the magnetic switch means and charged by the output therefrom, and discharging means connected to the second condenser to generate pulse discharge when charged voltage of the second condenser is applied thereto by switching the magnetic switch means.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: May 7, 1996
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Hiroshi Inatomi, Takashi Sakugawa, Hisashi Yanase, Takehisa Koganezawa, Kiyoshi Hara