Patents by Inventor Su Shia Chen

Su Shia Chen 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 tool having improved driving shank
    Patent number: 6935211
    Abstract: A ratchet tool includes a seat rotatably secured to a housing and having a number of teeth, a driving stem is engaged in the seat and has an engaging hole to receive a tool member, two pawls are slidably engaged in the housing and biased to engage with the teeth of the seat. A device may selectively disengage the pawls from the teeth of the seat to control a rotational direction of the seat by the housing. The driving stem includes a narrower neck formed in the other end to form a head and to engage with and to drive tool elements. The provision of the narrower neck in the driving stem permits the driving stem to rotate relative to the tool elements.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: August 30, 2005
    Inventor: Su Shia Chen
  • Ratchel tool having longitudinally movable pawls
    Patent number: 6622597
    Abstract: A ratchet tool includes a seat rotatably secured to a housing and having a number of teeth facing toward the housing, the housing having two channels for slidably receiving two pawls which are biased to engage with the teeth of the seat, and an actuator rotated by a control ferrule to selectively disengage the pawls from the teeth of the seat to control the rotational direction of the seat by the housing. A driving stem is engaged in the seat and has an engaging hole for changeably receiving a tool member. A rod may be biased to secure the tool member to the driving stem.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: September 23, 2003
    Inventor: Su Shia Chen
  • Ratchel tool having longitudinally movable pawls
    Publication number: 20020170392
    Abstract: A ratchet tool includes a seat rotatably secured to a housing and having a number of teeth facing toward the housing, the housing having two channels for slidably receiving two pawls which are biased to engage with the teeth of the seat, and an actuator rotated by a control ferrule to selectively disengage the pawls from the teeth of the seat to control the rotational direction of the seat by the housing. A driving stem is engaged in the seat and has an engaging hole for changeably receiving a tool member. A rod may be biased to secure the tool member to the driving stem.
    Type: Application
    Filed: May 18, 2001
    Publication date: November 21, 2002
    Inventor: Su Shia Chen
  • Tool handle
    Patent number: D447926
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: September 18, 2001
    Inventor: Su Shia Chen