Patents by Inventor Wan-Feng Chiang

Wan-Feng Chiang 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).

  • Publication number: 20070107560
    Abstract: The ratchet wrench has a body, a drive ring, two pawls, two resilient arms, a retaining ring and a split ring. The body has a handle and a box end with a ratchet hole and multiple ratchet teeth formed around and protruding into the ratchet hole. The drive ring and pawls are mounted rotatably in the ratchet hole, and the resilient arms connect the pawls to the drive ring and press the pawls against the ratchet teeth. The retaining ring is mounted around the drive ring and holds the retaining ring in the ratchet hole. The split ring connects the retaining ring to the drive ring.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 17, 2007
    Applicant: DING SHUN IND. CO., LTD.
    Inventor: Wan-Feng Chiang