Patent ID: 6447206
Filing Date: 2002-09-10
Classification: E01F,E03F

Abstract:
A beaver control screen for installation on an end of a culvert pipe, comprising:a cone-shaped screen having a base, an apex, and a central axis and a length between said base and said apex; said cone-shaped screen comprising a first set of spaced-apart straight rods extending from said base to said apex and being disposed in a first conical layer, and a second set of spaced-apart straight rods extending over a distance from said base toward said apex and being disposed in a second conical layer inside said first conical layer, in a concentric relationship with said first conical layer, and each rod in said first set of spaced-apart straight rods being spaced away from an adjacent rod in said second set of spaced-apart straight rods a same spacing along said adjacent rod.