Patents by Inventor Shouichi Nagasaka

Shouichi Nagasaka 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-processing electric power-source assembly
    Patent number: 5317122
    Abstract: A discharge-processing power-source assembly, in which a processing liquid is interposed at a minute gap defined between a workpiece and an electrode, and processing is executed by discharge energy, comprises a D.C. power source supplying electric energy to the minute gap, switching elements for converting D.C. voltage from the D.C. power source to pulse voltage, and a snubber circuit for protecting the switching elements. The discharge-processing power-source assembly further comprises a relay contact for cutting off the snubber circuit when a switching frequency is high.
    Type: Grant
    Filed: January 26, 1993
    Date of Patent: May 31, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akiyasu Ito, Munenori Kimura, Kazuo Tsurumoto, Shouichi Nagasaka