Patents by Inventor Zuofeng WANG

Zuofeng WANG 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: 11041467
    Abstract: A backflow preventer, including one or multiple reducing rings that are disposed in a pipeline; the outer edges of the reducing rings are connected to the inner wall of the pipeline; the multiple reducing rings are arranged along the axis of the pipeline; and the actual internal area of the reducing rings are gradually decreased in the axial direction of the reducing rings. Further disclosed is an engine EGR system including the backflow preventer. The backflow preventer can generate, according to different flowing directions in a pipeline, throttling losses of different degrees; when an air flows in a direction (forward direction) in which the actual internal area of the reducing rings decreases, the throttling loss is small; and when then air flows in a direction (reverse direction) in which the actual internal area of the reducing rings increases, the throttling loss is large.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 22, 2021
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Wei Li, Junlong Liu, Zhijie Li, Jie Pan, Zuofeng Wang, Chuntao Liu, Tianqin Kang
  • Publication number: 20200318580
    Abstract: A backflow preventer, including one or multiple reducing rings that are disposed in a pipeline, the outer edges of the reducing rings are connected to the inner wall of the pipeline; the multiple reducing rings are arranged along the axis of the pipeline, and the actual internal area of the reducing rings are gradually decreased in the axial direction of the reducing rings. Further disclosed is an engine EGR system including the backflow preventer. The backflow preventer can generate, according to different flowing directions in a pipeline, throttling losses of different degrees, when an air flows in a direction (forward direction) in which the actual internal area of the reducing rings decreases, the throttling loss is small; and when then air flows in a direction (reverse direction) in which the actual internal area of the reducing rings increases, the throttling loss is large.
    Type: Application
    Filed: December 27, 2017
    Publication date: October 8, 2020
    Inventors: Wei LI, Junlong LIU, Zhijie LI, Jie PAN, Zuofeng WANG, Chuntao LIU, Tianqin KANG