Patent ID: 8496408
Filing Date: 2013-07-30
Classification: B08B,E03F,F16L

Abstract:
1. A culvert insert comprising: an elongated rectangular strip of semi-rigid planar material formed in a spiral wrapped tube configuration having an upper face surface and a lower face surface with a first longitudinal side and a second longitudinal side; a seam having an H shape with a first pair of spaced apart parallel protruding arms, which are perpendicular to and extend sideways from a wall, and a second pair of spaced apart parallel protruding arms which are perpendicular to and extend sideways from the wall facing opposite to the first pair of arms, the second pair of parallel protruding arms being fixably attached to the first longitudinal side of the elongated rectangular strip, the first pair of parallel protruding arms extending sideways away from the first longitudinal side of the elongated rectangular strip, the first pair of parallel arms having a first protruding hook with having an end attached to one of the protruding arms and a free end extending toward another of the protruding arms; and a longitudinal groove running through at least one of the upper face and the lower face adjacent to the second longitudinal side of the rectangular strip, where the second longitudinal side is sandwiched between the first pair of protruding arms limiting substantial lateral movement of the second longitudinal side, and the first protruding hook slidably attaches to and slides within the longitudinal groove as the strip is rolled and unrolled into the spiral wrapped tube configuration.