Patents by Inventor Yongfei GU

Yongfei 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).

  • Device and method for strengthening thin-walled straight pipe
    Patent number: 11141773
    Abstract: A device for strengthening a straight pipe, including a first positioning mold, a second positioning mold, a split mold, a rounding mold, a first cavity and a second cavity. A method for strengthening a straight pipe is further provided. The split mold is adjusted to position the pipe. The pipe is inserted into the first and second positioning molds. First and second sealing rings are arranged in an inner cavity of the pipe. Hydraulic oil is injected into the first cavity to expand the pipe to perform an expanding deformation. When the hydraulic oil is unloaded, the split mold moves towards an axis of the first positioning mold to perform a reducing deformation. After the expanding and reducing deformations, the pipe is transported into the rounding mold, and hydraulic oil is injected into the second cavity to expand the pipe to perform the rounding.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: October 12, 2021
    Assignee: YANSHAN UNIVERSITY
    Inventors: Yongfei Gu, Junting Luo, Weipeng Liu, Lili Zhang, Chunxiang Zhang
  • DEVICE AND METHOD FOR STRENGTHENING THIN-WALLED STRAIGHT PIPE
    Publication number: 20210299728
    Abstract: A device for strengthening a straight pipe, including a first positioning mold, a second positioning mold, a split mold, a rounding mold, a first cavity and a second cavity. A method for strengthening a straight pipe is further provided. The split mold is adjusted to position the pipe. The pipe is inserted into the first and second positioning molds. First and second sealing rings are arranged in an inner cavity of the pipe. Hydraulic oil is injected into the first cavity to expand the pipe to perform an expanding deformation. When the hydraulic oil is unloaded, the split mold moves towards an axis of the first positioning mold to perform a reducing deformation. After the expanding and reducing deformations, the pipe is transported into the rounding mold, and hydraulic oil is injected into the second cavity to expand the pipe to perform the rounding.
    Type: Application
    Filed: March 18, 2021
    Publication date: September 30, 2021
    Inventors: Yongfei GU, Junting LUO, Weipeng LIU, Lili ZHANG, Chunxiang ZHANG