Patents by Inventor Brian Metcalfe

Brian Metcalfe 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).

  • METHOD AND APPARATUS FOR CREATING RAMMED AGGREGATE PIERS USING A HOLLOW MANDREL WITH UPWARD FLOW RESTRICTORS
    Publication number: 20080205993
    Abstract: A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remain in a cavity formed by the mandrel, and prevent aggregate from entering the mandrel during driving.
    Type: Application
    Filed: February 22, 2008
    Publication date: August 28, 2008
    Inventors: Kord J. Wissmann, Brian Metcalfe