Patents by Inventor Chang Chien-Chung

Chang Chien-Chung 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).

  • Leg exercise equipment
    Patent number: 5685810
    Abstract: A leg exercise equipment is disclosed, which includes a base plate, a supporting frame foldably mounted to the base plate, and a crank mechanism. The crank mechanism includes a swinging arm, of which one end is connected with a hydraulic cylinder through a shaft. The other end of the hydraulic cylinder is connected with a connecting pin which is fixedly fastened to the supporting frame. A leg holder is mounted on one end of the swinging arm. When the user's leg exerts force to the leg holder, the force will be transmitted to the hydraulic cylinder to drive the same to move back and forth so as to cause the leg muscle and hip muscle to be exercised evenly.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: November 11, 1997
    Inventor: Chang Chien Chung
  • Sole massaging wheel
    Patent number: D360696
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: July 25, 1995
    Inventor: Chang Chien-Chung