Patents by Inventor Cesar Estevez Bianchini

Cesar Estevez Bianchini 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).

  • Conical plug for sealing blastholes in open cut mining
    Patent number: 6324980
    Abstract: A conical plug for sealing a blast hole in the earth is provided. The plug is made from a generally circular sheet of elastic material such as plastic or metal and can be folded and releasably locked with a trigger into a conical shape. When in its conical shape, the plug is lowered into a blast hole and, when in position, a release weight is slid down the lowering cable to impact and release the trigger. When the trigger is released, the plug expands and is wedged against the sides of the blast hole forming a plug capable of supporting debris in the upper portion of the blast hole.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: December 4, 2001
    Inventor: Cesar Estevez Bianchini