Patents by Inventor QING-HE ZENG

QING-HE ZENG 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).

  • TUBE AND MACHINING DEVICE AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20100263427
    Abstract: A machining device used to machine a workpiece into a tube includes a punch and a cavity die. The cavity die includes a cavity and an extruding portion. The extruding portion is curved. The unilateral clearance between the punch and the cavity die is less than a thickness of the sidewall. A method for manufacturing a tube is also provided.
    Type: Application
    Filed: August 4, 2009
    Publication date: October 21, 2010
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: QING-HE ZENG, Yong Zeng, Cheng-Hung Lin