Fences – Driftage control
Patent
1991-07-10
1994-04-05
Reese, Randolph A.
Fences
Driftage control
256 131, 256 1, 521692, E01F 704
Patent
active
052997812
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.
REFERENCES:
patent: 3966172 (1976-06-01), Garrett
patent: 4339114 (1982-07-01), Deike
patent: 4730810 (1988-03-01), Rambaud
patent: 4819915 (1989-04-01), Cargnel
Barrett Robert K.
Hearn George
McMullen Michael L.
Kim Harry C.
Reese Randolph A.
State Department of Highways, State of Colorado
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