Patent ID: 6848229
Filing Date: 2005-02-01
Classification: E04F

Abstract:
1. An apparatus for shaping a substantially conical graded surface in a fill material around a drain, the apparatus comprising: an inner ring and an outer ring, said inner ring and said outer ring each having a height and defining an enclosed area, wherein the height of said outer ring is greater than the height of said inner ring, and wherein the enclosed area of said outer ring is greater than the enclosed area of said inner ring; a rail assembly connected at each of two ends to diametrically opposed portions of said outer ring, wherein said rail assembly is located above the enclosed area defined by said outer ring; a carriage movably connected to said rail assembly, and pivotally connected to diametrically opposed portions of said inner ring below said rail assembly such that said inner ring may be adjustably moved along the direction of said rail assembly within a boundary defined above said outer ring.