Patents by Inventor Daowen Lu

Daowen Lu 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).

  • Loose-proof structure of a filter cartridge shell
    Patent number: 8623207
    Abstract: A loose-proof structure of a filter cartridge shell, includes: a filter cartridge shell body, the filter cartridge shell body has an open end which includes several treads in its inside and an upper end surface, and an upper end cover, which is hermetically and spirally coupled with the filter cartridge shell body. The upper cover has a raised rafter edge. The raised rafter edge and the open end are equipped with a loose-proof fixed ring. a periphery surface of the raised rafter edge has loose-proof locking teeth, an inside surface of the loose-proof fixed ring has loose-proof tooth spaces matching with the loose-proof locking teeth. An external end surface of the open end has loose-proof scabs, the loose-proof fixed ring has loose-proof grooves on its bottom matching with the loose-proof scabs.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: January 7, 2014
    Assignee: Zhejiang Qinyuan Water Treatment S. T. Co. Ltd.
    Inventors: Xiuyou Ye, Jianlin Liang, Kaiqin Peng, Daowen Lu
  • Loose-proof structure of a filter cartridge shell
    Publication number: 20120067804
    Abstract: A loose-proof structure of a filter cartridge shell, includes: a filter cartridge shell body, the filter cartridge shell body has an open end which includes several treads in its inside and an upper end surface, and an upper end cover, which is hermetically and spirally coupled with the filter cartridge shell body. The upper cover has a raised rafter edge. The raised rafter edge and the open end are equipped with a loose-proof fixed ring. a periphery surface of the raised rafter edge has loose-proof locking teeth, an inside surface of the loose-proof fixed ring has loose-proof tooth spaces matching with the loose-proof locking teeth. An external end surface of the open end has loose-proof scabs, the loose-proof fixed ring has loose-proof grooves on its bottom matching with the loose-proof scabs.
    Type: Application
    Filed: January 13, 2011
    Publication date: March 22, 2012
    Inventors: Xiuyou Ye, Jianlin Liang, Kaiqin Peng, Daowen Lu