Patents by Inventor Shu-gen Chang

Shu-gen Chang 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).

  • Chain shifting device for bicycle
    Patent number: 5456637
    Abstract: A chain shifting device for bicycle includes a body having a connector and a coupler pivotally coupled to the upper and lower portion. The clutch cable is threaded through the connector and is secured to the coupler. A frame is secured to the coupler for supporting chain tension pulley and chain guide pulley. The frame is moved by the clutch cable in order to shift the chain to engage with either of the rear sprocket wheels so as to change the bicycle speed. Two positioning screws are secured to the block for engaging with the connector and the coupler and for limiting movement of the frame.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: October 10, 1995
    Inventor: Shu-gen Chang