Patent ID: 7052210
Filing Date: 2006-05-30
Classification: E01F

Abstract:
1. A highway culvert inlet collar comprising a plate member, said plate member having a front flow contacting face, a rear face, a peripheral side edge intermediate said front flow contacting face and said rear face, and a tapered inlet face portion adjacent said front flow contacting face, said front flow contacting face having a front flow contacting face effective width and said tapered inlet face portion having a tapered inlet face portion effective width, said front flow contacting face having a substantially constant width, and said tapered inlet face portion having a substantially constant width, said front flow contacting face effective width being at least twice said tapered inlet face portion effective width, and a pipe adapter, said pipe adapter having a first end and a second end, said pipe adapter having an interior surface and an exterior surface, said pipe adapter being attached to said plate member, said pipe adapter being dimensioned to accommodate a pipe having a diameter of at least 24″.