Patents by Inventor Charles Edward Cadwell

Charles Edward Cadwell 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).

  • Patent number: 7866569
    Abstract: A railroad cross tie having an inner core with at least one longitudinally extending metallic reinforcing member and an outer casing. The cross tie includes first and second end caps. The first end cap is disposed proximate a first end of the inner core and the second end cap is disposed proximate a second opposite end. One embodiment of the cross tie includes an expansion gap longitudinally disposed between the first and second end caps. Longitudinal dimensions of the expansion gap varies in response to differential thermal expansion between the inner core and the outer casing. In other embodiments, the end caps are mechanically interlocked with the inner core and the outer casing overlays a portion of the end caps. The disclosed structures securely and reliably attach the end caps to the cross tie. A method of manufacturing cross ties is also disclosed.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: January 11, 2011
    Assignee: Dynamic Composites, LLC
    Inventor: Charles Edward Cadwell
  • Publication number: 20100170956
    Abstract: A railroad cross tie having an inner core with at least one longitudinally extending metallic reinforcing member and an outer casing. The cross tie includes first and second end caps. The first end cap is disposed proximate a first end of the inner core and the second end cap is disposed proximate a second opposite end. One embodiment of the cross tie includes an expansion gap longitudinally disposed between the first and second end caps. Longitudinal dimensions of the expansion gap varies in response to differential thermal expansion between the inner core and the outer casing. In other embodiments, the end caps are mechanically interlocked with the inner core and the outer casing overlays a portion of the end caps. The disclosed structures securely and reliably attach the end caps to the cross tie. A method of manufacturing cross ties is also disclosed.
    Type: Application
    Filed: January 5, 2009
    Publication date: July 8, 2010
    Inventor: Charles Edward Cadwell