Patents by Inventor David Daniel Davis

David Daniel Davis 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).

  • Rail joint assembly using embedded load transfer keys and method therefor
    Patent number: 7871015
    Abstract: A rail joint assembly joining the ends of two rails together includes a pair of joint bars. Each joint bar having one side configured to the rail web side. Mechanical fasteners mount the joint bars to the web sides. Pairs of load bearing keys are embedded in web counter bores at predetermined depths into the webs and embedded in adjacent joint bar counter bores at predetermined depths into the joint bars. The pairs of keys in the webs and the joint bars transfer railway loads through the joint and substantially strengthen the rail joint assembly.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: January 18, 2011
    Assignee: Transportation Technology Center, Inc.
    Inventors: Muhammad Naeem Akhtar, David Daniel Davis