Abstract: A one-pass bucket includes a top wall, a bottom wall, a rear wall and a pair of side walls diverging forwardly from the rear wall to an open front end of the bucket, wherein the curved end walls extend convexly from the bottom wall to the top of the end wall at a forward edge thereof, and extending substantially diagonally upwardly from the bottom at a rearward edge so that the forward edge of the curved end wall curves upwardly towards the plane of the top wall so as to intersect the plane of the top wall non-tangentially and the rearward edge extends diagonally to intersect the plane of the top wall whereby a round bottom ditch is formed by rotating one of the curved end walls down and dragging that curved end wall through the soil longitudinally of the proposed ditch in a single pass.

Abstract: A one-pass bucket includes a top wall, a bottom wall, a rear wall and a pair of side walls diverging forwardly from the rear wall to an open front end of the bucket, wherein the curved end walls extend convexly from the bottom wall to the top of the end wall at a forward edge thereof, and extending substantially diagonally upwardly from the bottom at a rearward edge so that the forward edge of the curved end wall curves upwardly towards the plane of the top wall so as to intersect the plane of the top wall non-tangentially and the rearward edge extends diagonally to intersect the plane of the top wall whereby a round bottom ditch is formed by rotating one of the curved end walls down and dragging that curved end wall through the soil longitudinally of the proposed ditch in a single pass.

Abstract: An extension for a grader blade which is used to dig a concave ditch includes a body for mounting on or integral with one end of the grader blade, the body having a convex outer side edge adapted to scoop out a curved-bottom ditch when the grader blade is angled from the horizontal with the extension at the lowermost end of the blade, and moved through the surface.

Abstract: A one-pass bucket for digging a ditch by moving the bucket with its curved end down longitudinally of the proposed ditch, wherein the bucket includes a top wall, a bottom wall, a rear wall and a side wall diverging forwardly from the rear wall to an open front end of the bucket, the side wall being planar and defining a sharp acutely-angled corner with the bottom wall, the curved end wall, opposite the first side wall, extends convexly from the bottom wall to said top end at a forward edge thereof, and extending substantially diagonally upwardly therefrom at a rearward edge so that the forward edge of the curved end wall curves upwardly towards the plane of the top wall so as to intersect it non-tangentially and the rearward edge extends diagonally to intersect the plane of the top wall whereby a round bottom ditch is formed by rotating said curved end wall downwardly relative to the acutely angled corner and dragging the curved end wall through the soil longitudinally of the proposed ditch in a single pass.

Abstract: A one-pass bucket for digging a ditch by moving the bucket with its curved end down longitudinally of the proposed ditch, wherein the bucket includes a top wall, a bottom wall, a rear wall and a side wall diverging forwardly from the rear wall to an open front end of the bucket, the side wall being planar and defining a sharp acutely-angled corner with the bottom wall, the curved end wall, opposite the first side wall, extends convexly from the bottom wall to said top end at a forward edge thereof, and extending substantially diagonally upwardly therefrom at a rearward edge so that the forward edge of the curved end wall curves upwardly towards the plane of the top wall so as to intersect it non-tangentially and the rearward edge extends diagonally to intersect the plane of the top wall whereby a round bottom ditch is formed by rotating said curved end wall downwardly relative to the acutely angled corner and dragging the curved end wall through the soil longitudinally of the proposed ditch in a single pass.