Patents by Inventor LIUZHU ZHANG

LIUZHU ZHANG 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).

  • Frequency converter
    Patent number: 11558985
    Abstract: The present disclosure provides a frequency converter. The frequency converter includes a box body and a bottom box. A bottom portion of the box body is fixedly connected with a top portion of the bottom box. A top portion of a left side of the box body and a bottom portion of the left side of the box body are fixedly connected to a respective fan. A top portion of a left side of an inner wall of the box body and a top portion of the left side of the inner wall of the box body are fixedly connected to a respective annular plate. One end of an output shaft of each fan is fixedly connected to a rotating rod. One end of each rotating rod away from the fan passes through the box body and extends to an interior of the box body.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: January 17, 2023
    Assignee: CHINA UNIVERSITY OF PETROLEUM BLUE SKY (QINGDAO) PETROLEUM TECHNOLOGY CO., LTD.
    Inventors: Kaikai Li, Huidong Lu, Chuan Yan, Enfang Xu, Weizhong Wei, Jiasheng Zhang, Shouyuan Zhao, Liuzhu Zhang, Xinran Li, Maofeng Yang
  • FREQUENCY CONVERTER
    Publication number: 20210195809
    Abstract: The present disclosure provides a frequency converter. The frequency converter includes a box body and a bottom box. A bottom portion of the box body is fixedly connected with a top portion of the bottom box. A top portion of a left side of the box body and a bottom portion of the left side of the box body are fixedly connected to a respective fan. A top portion of a left side of an inner wall of the box body and a top portion of the left side of the inner wall of the box body are fixedly connected to a respective annular plate. One end of an output shaft of each fan is fixedly connected to a rotating rod. One end of each rotating rod away from the fan passes through the box body and extends to an interior of the box body.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 24, 2021
    Inventors: KAIKAI LI, HUIDONG LU, CHUAN YAN, ENFANG XU, WEIZHONG WEI, JIASHENG ZHANG, SHOUYUAN ZHAO, LIUZHU ZHANG, XINRAN LI, MAOFENG YANG