Patents by Inventor Su-Yueh Chiuchang

Su-Yueh Chiuchang 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).

  • Ball valve body manufacturing method
    Publication number: 20030213125
    Abstract: A ball valve body manufacturing method is disclosed. The method comprises rolling a continuous metal tube to form a series of connected ball valve body blanks by roller means, punching or milling the blanks to form at least one valve stem fastening slot thereon, rubbing or polishing surfaces of the blanks to form substantially rounded surfaces, and cutting the blanks into a plurality of ball valve bodies each having two opposite openings in communication each other.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 20, 2003
    Inventor: Su-Yueh Chiuchang