Patents by Inventor Hsi H. Chen

Hsi H. Chen 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).

  • Glue injector and the process of injection
    Patent number: 5518145
    Abstract: The present invention relates to a glue injector for repairing the cracks on concrete and the process of injection, especially in that the glue in the injector is pushed by the gaseous pressure of carbon dioxide produced by the reaction of chemical decomposition into the crack of concrete. An aqueous solution of citric acid is arranged in the pressure chamber on the top of the injector in this invention, a sodium bicarbonate tablet is placed into the pressure chamber through the aperture thereon, and carbon dioxide gas is gradually released by the reaction of chemical decomposition caused by mixing these two media. The increasing gaseous pressure is used to push the piston in the injector, and push the glue in front of the piston into the crack.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: May 21, 1996
    Inventor: Hsi H. Chen