Patents by Inventor Zhanbo Gu

Zhanbo Gu 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).

  • Electric discharge machining power supply, and electric discharge machining method
    Patent number: 6423920
    Abstract: A power supply (100) and a method for electric discharge machining by repeatedly providing a current pulse to a working gap (3) formed between a tool electrode (1) and a workpiece (2) includes a d.c. power source (E), first switching elements (Tr1-Trn) connected between the d.c. power source and the working gap, capacitors (C1-C8) connected in parallel with the working gap, second switching elements (67) for controlling current flow from the capacitor to the working gap, a detector (50) for detecting start of an electric discharge, and a controller (20) for controlling the first switching elements and the second switching elements in response to the detector. Current is supplied from the d.c.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: July 23, 2002
    Assignee: Sodick Co., Ltd.
    Inventors: Yuji Kaneko, Daisuke Sadsmitsu, Zhanbo Gu