Patents Assigned to State Department of Highways, State of Colorado
  • Flex post fence
    Patent number: 5299781
    Abstract: A boulder rolling down a slope is caught with an energy absorbing device to dissipate a portion of its kinetic energy and to redirect the boulder downwardly into the ground to absorb the rest of the kinetic energy and to stop it. This is accomplished by temporary deformation of joints in the energy absorbing device to dissipate the kinetic energy and redirect the boulder downwardly into the ground. The energy absorbing device will return substantially to its undeformed state for intercepting additional boulders which may roll down the slope.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: April 5, 1994
    Assignee: State Department of Highways, State of Colorado
    Inventors: Robert K. Barrett, George Hearn, Michael L. McMullen