Patents by Inventor Zhi Qin Cui

Zhi Qin Cui 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).

  • Rotatable chuck
    Patent number: 7481608
    Abstract: A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: January 27, 2009
    Assignee: Eastway Fair Company Limited
    Inventors: Jin Lin Zhou, Xian Guo Zhao, Chin Hung Lam, Zhi Qin Cui, Koon For Chung
  • Rotatable chuck
    Patent number: 7478979
    Abstract: A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: January 20, 2009
    Assignee: Eastway Fair Company Limited
    Inventors: Jin Lin Zhou, Xian Guo Zhao, Chin Hung Lam, Zhi Qin Cui, Koon For Chung