Patents by Inventor Ran-Ran Xia

Ran-Ran Xia 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: 7775294
    Abstract: This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: August 17, 2010
    Assignee: Dongguan Qunsheng Powder Metallurgy Co., Ltd.
    Inventors: Xi-Ren Ren, Zhi-Wei Bai, Ran-Ran Xia
  • Publication number: 20090288850
    Abstract: This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force.
    Type: Application
    Filed: July 23, 2008
    Publication date: November 26, 2009
    Applicant: Dongguan Qunsheng Powder Metallurgy Co., Ltd.
    Inventors: Xi-Ren Ren, Zhi-Wei Bai, Ran-Ran Xia