Patents by Inventor Che-hsiung Yang

Che-hsiung Yang 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).

  • Coupling device for metal pipes with innovative packing structure
    Patent number: 6241292
    Abstract: A coupling device for metal pipes includes a cup-joint, a packing bushing, a padding bushing and a bridging connector. The cup-joint holds and confines in its confining face the packing bushing and the padding bushing to yield a central holding hole for accommodating metal pipe. When the set of cup-joint, packing bushing and padding bushing is screwed to the threaded head of the bridging connector, the guiding face of the cup-joint squeezes the converging ending of the padding bushing to yield an excellent sealing effect to the metal pipe, while in turn the padding bushing pushes and squeezes the fortifiers against the confining face and the metal pipe to yield a clasping and sealing effect against leakage inside the couple device.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: June 5, 2001
    Inventor: Che-hsiung Yang