SOIL LOOSENING TOOL Russian patent published in 1998 - IPC

FIELD: agricultural engineering; soil working tools of tillage machines designed for loosening the soil without deformation of soil surface structure. SUBSTANCE: soil loosening tool has post inclined relative to direction of machine movement to which loosening members and bar point are connected. Loosening members are made in form of rings with blades on end faces. Rings are installed at sides of post higher than bar point. Post is installed for re-placing relative to direction of movement and is furnished with additional blade and bar point. Post consists of equal thickness sides. Loosening members in form of rings are formed by parts of post sides. Blades on end faces of rings are made with different angles of sharpening. Blades on upper parts of ring arcs are made with angles of sharpening equal to 18-21 degrees. Blades on lower parts of arcs are made with angles of sharpening equal to 30-35 degrees. Blades of loosening members are pointed inwards the rings. Cutting edges of blades on end faces of loosening members are made to spiral lines with left-hand and right-hand hand of helix. EFFECT: improved loosening of soil. 9 cl, 4 dwg