Patents by Inventor Shuchao Cheng

Shuchao Cheng 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).

  • Patent number: 5039244
    Abstract: A toothbrush and toothpaste system utilizing a container for the toothpaste which includes a chamber having a movable piston within the same. A spline is generally centrally located within the chamber with the movable piston circumjacently located relative to the spline. The piston is intended to contact toothpaste which is loaded within the chamber. The pistons movement is biased in one direction along the line. A head is connected to the container and includes a bristle structure usable as a toothbrush. The head includes a passageway which communicates with the adjacent chamber of the container and the bristle structure of the head. A valve separated by movement of the spline opens the passageway permitting communication between the chamber and the bristle structure. Springs means is also included for closing the valve relative to the container. The piston continually moves along the spline during the delivery of toothpaste to the bristle structure in only one direction within the chamber of the container.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: August 13, 1991
    Inventor: Shuchao Cheng