Cylindrical drum tiller attachment

An attachment for a tiller controlled by an operator walking behind the tiller and comprising a horizontally disposed shaft, power means for rotating the shaft, handle means for engagement by the operator, and wheels disposed between the shaft and handle means, for supporting the tiller, said attachment comprising

• a cylindrical drum having a tubular shell defining an exterior curved surface, and having a tubular sleeve disposed interiorly of and radially spaced from said tubular shell and concentric therewith, said sleeve having an interior surface adapted for engagement with the outside surface of said shaft;
• detachable means for passing through said sleeve and said shaft for affixing said sleeve to said shaft for transferring rotation of said shaft to rotation of said sleeve,
• means extending between said sleeve and said tubular shell for attaching said sleeve to said shell so that rotation of said sleeve effects coincident rotation of said shell while allowing access to said detachable means from a point exterior of said drum,
• a plurality of substantially cylindrical teeth extending substantially linearly radially outwardly from the exterior curved surface of said drum, and
• means for mounting said teeth in circumferential rows, at least three teeth in each circumferential row, so that they project radially outwardly from the curved exterior surface and are disposed in a plurality of spiral courses, all teeth in each circumferential row being disposed in a plane perpendicular to said tubular sleeve with each of said cylindrical teeth having a diameter of about one-third the distance that it extends radially outwardly from the exterior surface of said drum and the center of each of said teeth being spaced approximately four times its diameter from the teeth adjacent thereto.