Patents by Inventor HUNG-PIN CHU

HUNG-PIN CHU 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).

  • Universal joint structure for a tool
    Patent number: 8956236
    Abstract: A universal joint structure for a tool contains an operating rod, a fitting sleeve, and a retaining member. The operating rod includes a universal joint formed on one end thereof, the universal joint is formed in a polygonal sphere shape, the fitting sleeve includes a polygonal locking groove defined thereon for fitting the universal joint, the fitting sleeve also includes a circular recess arranged adjacent to an opening of the locking groove and retaining with the retaining member. The retaining member is a C-retaining ring and includes a tilted guiding face defined around one surface thereof, and wherein one end of the titled face away from the circular recess is larger than another end of the titled guiding face adjacent to the circular recess so that when the universal joint is fitted into the locking groove, the titled guiding face retains with the universal joint of the operating rod.
    Type: Grant
    Filed: June 30, 2013
    Date of Patent: February 17, 2015
    Inventor: Hung-Pin Chu
  • UNIVERSAL JOINT STRUCTURE FOR A TOOL
    Publication number: 20150005080
    Abstract: A universal joint structure for a tool contains an operating rod, a fitting sleeve, and a retaining member. The operating rod includes a universal joint formed on one end thereof, the universal joint is formed in a polygonal sphere shape, the fitting sleeve includes a polygonal locking groove defined thereon for fitting the universal joint, the fitting sleeve also includes a circular recess arranged adjacent to an opening of the locking groove and retaining with the retaining member. The retaining member is a C-retaining ring and includes a tilted guiding face defined around one surface thereof, and wherein one end of the titled face away from the circular recess is larger than another end of the titled guiding face adjacent to the circular recess so that when the universal joint is fitted into the locking groove, the titled guiding face retains with the universal joint of the operating rod.
    Type: Application
    Filed: June 30, 2013
    Publication date: January 1, 2015
    Inventor: HUNG-PIN CHU