Patents by Inventor Zhiwu Sun

Zhiwu Sun 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).

  • Trunk injection needle
    Patent number: 10212893
    Abstract: A trunk injection needle includes: a front part which is conical, a middle part which is cylindrical, and a rear part which is cylindrical, which are respectively provided along a needle axis; wherein an outer diameter of the rear part is larger than outer diameters of the front part and the middle part; the front part has a bits guiding hole extending along the needle axis, and the rear part has a drug feeding hole extending along the needle axis; wherein the middle part has two outlet holes extending along a radical direction, and a separating board is provided between the two outlet holes; a rear end of the bits guiding hole communicates with the two outlet holes at two sides of the separating board; and a front end of the drug feeding hole communicates with the two outlet holes.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: February 26, 2019
    Assignee: NANJING FORESTRY UNIVERSITY
    Inventors: Qingqing Shang, Tongming Yin, Zhiwu Sun, Yunwei Ju
  • Trunk injection needle
    Publication number: 20160360709
    Abstract: A trunk injection needle includes: a front part which is conical, a middle part which is cylindrical, and a rear part which is cylindrical, which are respectively provided along a needle axis; wherein an outer diameter of the rear part is larger than outer diameters of the front part and the middle part; the front part has a bits guiding hole extending along the needle axis, and the rear part has a drug feeding hole extending along the needle axis; wherein the middle part has two outlet holes extending along a radical direction, and a separating board is provided between the two outlet holes; a rear end of the bits guiding hole communicates with the two outlet holes at two sides of the separating board; and a front end of the drug feeding hole communicates with the two outlet holes.
    Type: Application
    Filed: July 8, 2015
    Publication date: December 15, 2016
    Inventors: Qingqing Shang, Tongming Yin, Zhiwu Sun, Yunwei Ju