Patents by Inventor Rongqing QIN

Rongqing QIN 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: 12383374
    Abstract: A head assembly for a dental contra-angle hand-piece and a dental contra-angle hand-piece are provided. The head assembly includes a hand-piece main body, a reversing valve movably connected to the hand-piece main body, and an inner water tube connected to the hand-piece main body, wherein the hand-piece main body is provided with a first flow channel and a second flow channel independent from each other, the first flow channel is configured to be in communication with a liquid outlet of a motor, and the second flow channel is configured to be in communication with an external pipeline; the reversing valve is provided with a confluence channel, the reversing valve is configured to enable, when moving relative to the hand-piece main body, the first flow channel and the second flow channel to alternatively be in communication with the inner water pipe through the confluence channel.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: August 12, 2025
    Assignee: GUILIN WOODPECKER MEDICAL INSTRUMENT CO., LTD.
    Inventors: Xunxian Wu, Kunyou Wu, Rongqing Qin, Shiyou Bin, Benqin Zhang, Jianhua Lin, Sheng Sun, Fengwen Wei
  • Publication number: 20220226072
    Abstract: A head assembly for a dental contra-angle hand-piece and a dental contra-angle hand-piece are provided. The head assembly includes a hand-piece main body, a reversing valve movably connected to the hand-piece main body, and an inner water tube connected to the hand-piece main body, wherein the hand-piece main body is provided with a first flow channel and a second flow channel independent from each other, the first flow channel is configured to be in communication with a liquid outlet of a motor, and the second flow channel is configured to be in communication with an external pipeline; the reversing valve is provided with a confluence channel, the reversing valve is configured to enable, when moving relative to the hand-piece main body, the first flow channel and the second flow channel to alternatively be in communication with the inner water pipe through the confluence channel.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Inventors: Xunxian WU, Kunyou WU, Rongqing QIN, Shiyou BIN, Benqin ZHANG, Jianhua LIN, Sheng SUN, Fengwen WEI