Patents by Inventor Kelun Zhao

Kelun Zhao 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: 9196947
    Abstract: A method for manufacturing a resonant tube is provided in the present invention, which comprises: mechanically mixing 88-98 wt. % of iron-nickel alloy powder, 1-8 wt. % of carbonyl iron powder, and 1-8 wt. % of carbonyl nickel powder to form a uniform powder mixture; molding the uniform powder mixture to form a resonant tube blank; and continuously sintering and annealing the resonant tube blank. Also provided in the present invention are a resonant tube and a cavity filter. The method for manufacturing a resonant tube provided in the present invention significantly enhances production efficiency while greatly reducing consumption of raw materials. Moreover, the resonant tube provided in the present invention reduces, to the greatest extent, segregation of alloy components and coarse and uneven microstructures, thereby increasing the performance and stability of the corresponding products.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: November 24, 2015
    Assignee: SHENZHEN TATFOOK NETWORK TECHNOLOGY CO., LTD.
    Inventors: Kelun Zhao, Fengping Shen, Bingbing Wan, Yanzhao Zhou
  • Publication number: 20130127569
    Abstract: A method for manufacturing a resonant tube is provided in the present invention, which comprises: mechanically mixing 88-98 wt. % of iron-nickel alloy powder, 1-8 wt. % of carbonyl iron powder, and 1-8 wt. % of carbonyl nickel powder to form a uniform powder mixture; molding the uniform powder mixture to form a resonant tube blank; and continuously sintering and annealing the resonant tube blank. Also provided in the present invention are a resonant tube and a cavity filter. The method for manufacturing a resonant tube provided in the present invention significantly enhances production efficiency while greatly reducing consumption of raw materials. Moreover, the resonant tube provided in the present invention reduces, to the greatest extent, segregation of alloy components and coarse and uneven microstructures, thereby increasing the performance and stability of the corresponding products.
    Type: Application
    Filed: June 1, 2011
    Publication date: May 23, 2013
    Applicant: Shenzhen Tatfook Network Technology Co., Ltd.
    Inventors: Kelun Zhao, Fengping Shen, Bingbing Wan, Yanzhao Zhou