Patents by Inventor David Lewis, Sr.

David Lewis, Sr. 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).

  • Roadway energy absorbing impact attenuator
    Patent number: 6454488
    Abstract: An energy absorbing system comprising a plurality of break-away post elements sequentially spaced to be sheared off by impact of a vehicle. Each post element individually absorbs and decelerates the impacting vehicle at a pre-determined rate that in multiple successive impacts slows the vehicle to a stop before the barrier or to an acceptable speed within the design requirements for impact with a barrier.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: September 24, 2002
    Inventors: David Lewis, Sr., David Hubbell, William Bryson, William Atwood