Patents by Inventor Yang-Hua Li

Yang-Hua Li 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).

  • Ratchet wrench having reinforced strength
    Patent number: 7444903
    Abstract: A ratchet wrench includes a wrench body provided with a mounting hole and a receiving chamber, a ratchet wheel mounted in the mounting hole of the wrench body and provided with a plurality of ratchet teeth, and a pawl member mounted in the receiving chamber of the wrench body and having a first end provided with a plurality of locking teeth engaged with the ratchet teeth of the ratchet wheel and a second end provided with a sliding face slidable on the ratchet teeth of the ratchet wheel. Thus, the locking teeth of the pawl member are engaged with the ratchet teeth of the ratchet wheel closely and completely, so that the pawl member is combined with the ratchet wheel exactly.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: November 4, 2008
    Assignee: Hua Pan Co., Ltd.
    Inventor: Yang-Hua Li