Patents by Inventor David Clardy

David Clardy 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).

  • System and method for tracking personnel and equipment
    Patent number: 7843348
    Abstract: A system for tracking personnel and equipment in hazardous environments in pre or post-accident situations includes an intrinsically safe tracking tag and an intrinsically safe reader system. The intrinsically safe tracking tag transmits identification and status information to the intrinsically safe reader system, which includes a plurality of intrinsically safe antennas and a hub cable driver. In one embodiment, antennas are located at known positions in the hazardous environment and connected via a redundant, wired-mesh topology. The wired-mesh topology also allows more flexible antenna placement than line-of-sight wireless-mesh systems. The hub cable driver provides intrinsically safe power to and communication with the antennas using communication cables, receives data signals from the antennas, and transmits the data signals to a server. The server stores the data signals in a storage device and is connected to a workstation. The workstation retrieves the stored data to track persons or equipment.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: November 30, 2010
    Assignee: Alliance Coal, LLC
    Inventors: Tracy L. Hayford, David Clardy, Mark Watson, Justin E. Bennett, Paul R. Blaylock, Timothy M. Debaillie, Mike E. Ciholas, Evan M. Buchanan, Christopher Elpers
  • SYSTEM AND METHOD FOR TRACKING PERSONNEL AND EQUIPMENT
    Publication number: 20080266110
    Abstract: A system for tracking personnel and equipment in hazardous environments in pre or post-accident situations includes an intrinsically safe tracking tag and an intrinsically safe reader system. The intrinsically safe tracking tag transmits identification and status information to the intrinsically safe reader system, which includes a plurality of intrinsically safe antennas and a hub cable driver. In one embodiment, antennas are located at known positions in the hazardous environment and connected via a redundant, wired-mesh topology. The wired-mesh topology also allows more flexible antenna placement than line-of-sight wireless-mesh systems. The hub cable driver provides intrinsically safe power to and communication with the antennas using communication cables, receives data signals from the antennas, and transmits the data signals to a server. The server stores the data signals in a storage device and is connected to a workstation. The workstation retrieves the stored data to track persons or equipment.
    Type: Application
    Filed: June 13, 2008
    Publication date: October 30, 2008
    Applicant: ALLIANCE COAL, LLC
    Inventors: Tracy L. Hayford, David Clardy, Mark Watson, Justin E. Bennett, Paul R. Blaylock, Timothy M. Debaillie, Mike E. Ciholas, Evan M. Buchanan, Christopher Elpers