Patents by Inventor Robert B. Sawdon

Robert B. Sawdon 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).

  • Feeder for adding fibrous material to a conveyor having concrete ingredients
    Patent number: 5316197
    Abstract: The present invention is an apparatus for introducing fibrous material into a continuous flow of concrete. Fibrous material is pushed through an aperture located in the bottom of a container. As the fiber falls from the aperture, it is agitated and spread evenly onto the mixture of concrete. The resulting distribution of fiber within the concrete mixture increases the strength of the concrete while preventing undo grouping of the fibers.
    Type: Grant
    Filed: December 1, 1992
    Date of Patent: May 31, 1994
    Assignee: Cemen Tech, Inc.
    Inventors: Hugh J. Tobler, Larry G. Lepper, Robert B. Sawdon