Patents by Inventor Cheng Ching Kung

Cheng Ching Kung 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).

  • Sealing device for a rotary shaft
    Patent number: 5769605
    Abstract: A sealing device for a centrifugal pump is mounted on an axle of the centrifugal pump and includes a retainer ring, a supporting ring, a rotor ring, and a fixing ring. The supporting ring includes a plurality of tongues extending outwardly and radially therefrom and each having a screw hole for engagement with the retainer ring. The rotor ring includes a plurality of notches each for engaging with an associated tongue, thereby mounting the rotor ring to the retainer ring.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: June 23, 1998
    Inventor: Cheng Ching Kung