Patents by Inventor Chung-Shien Shea

Chung-Shien Shea 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).

  • Door operator with detachable electric motor
    Patent number: 6055885
    Abstract: A door operator comprising electric actuating motor; a reduction gear; manual transmission mechanism between the electric actuating motor and the reduction gear, the electric actuating motor and the manual transmission mechanism independently actuating the reduction gear; a proximal clutch with a proximal disc, which is mounted on a rotating shift of the manual transmission shaft; an end disc of the proximal clutch secured on the rotating shaft of manual transmission mechanism; and an electromagnet secured on a bearing seat inside a housing of the manual transmission mechanism, which is controllable to produce a magnetic effect for a pull chain disc sleeved on the bearing seat to move axially.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: May 2, 2000
    Inventor: Chung-Shien Shea