SOIL LOOSENER Russian patent published in 1998 - IPC

FIELD: agricultural engineering; tillage machine working tools for deep digging in irrigated soils with plant and root residues. SUBSTANCE: loosener has vertically installed knife, deforming members and bar point on lower cut. Deforming members and bar point on knife are fixed in position. Knife is made up of two plates with double edge cutting blades at sides connected to each other. Cutting blades are aligned and installed at different angles of inclination relative to bar point axis. Deforming members have passive and resilient parts. Passive members on side surfaces of plates are formed by hollow semiellipsoids of revolution. Resilient members are connected by fasteners in form of threaded plugs with forks on one end and are mated with holes on rear part of knife through axles and at other side, either with coils of cylindrical extension springs, or equal resistance springs, or oblique extension springs. Diameter of springs prevail over maximum diameter of cross section of passive deforming member. EFFECT: improved quality of soil tillage. 6 dwg