Patents by Inventor Ding Qian

Ding Qian 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).

  • Electrode with brazed separator and method of making same
    Patent number: 6452130
    Abstract: An electrode for a plasma arc torch and method of fabricating the same are disclosed, and wherein the electrode comprises a copper holder defining two coaxial cavities. An emissive element is secured to one of the cavities and serves as the cathode terminal for the arc during operation. A relatively non-emissive separator is disposed about the emissive element within the other cavity, and acts to separate the copper holder and the emissive element, as well as resisting detachment of the arc from the emissive element and attachment to the copper holder.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: September 17, 2002
    Assignee: The ESAB Group, Inc.
    Inventors: Ding Qian, Tommie Zack Turner, Rue Allen Lynch