Patents by Inventor Hung En Liu

Hung En Liu 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: 20040211785
    Abstract: The invention provides a molded tube with a sealed end. When the tube body is placed front of a press mold, an end of the tube body is heated while being rotated until the ends is moldable. Thereafter, the end portion of the tube is shaped in a manner that an inner wall of the end portion of the tube body tapes outwardly, so that a wall thickness of the tube body is smaller than that of the end portion. A plurality of threads or a groove is further formed on an external surface of the end portion of the tube to further fastening an additional element.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 28, 2004
    Inventor: Hung-En Liu
  • Publication number: 20010047676
    Abstract: A method of sealing the orifice of a metal tube by: rotating the metal tube to be sealed and using a heat source to soften the orifice of the metal tube to be sealed, and then using a mold to mold the softened material of the metal tube, enabling an end wall, which can have any of a variety of shapes, to be formed integral with the metal tube to seal the orifice.
    Type: Application
    Filed: September 14, 1999
    Publication date: December 6, 2001
    Inventor: HUNG-EN LIU
  • Patent number: D528800
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: September 26, 2006
    Assignee: i-Concept International Limited
    Inventors: Hung En Liu, Jean-Pierre E. A Degembe