WORKING TOOL FOR CUTTING SUPERNARROW SLITS Russian patent published in 1999 - IPC

FIELD: agriculture. SUBSTANCE: working tool has tine, chisel and detachable blades. Tine has sides and inserts attached to inner surfaces. Inserts define slot for receiving detachable blades between tine sides. Each blade may be fixed in slot. Each blade is formed as planar oblique-angled parallelepiped with cutting edges. Blades are mounted on tine in overlapped relation. Chisel is fixed on lower tine cut by means of retainer. Beveled portions inclined to different extent are disposed on front part of sides. Inserts manufactured from metal strips are offset relative to beveled portions by various distances so that top part of upper insert protrudes into space between joined sides to larger extent than its bottom part, and top part of lower insert protrudes into space to lesser extent than its bottom part. Tine sides are made from constructional, high-alloy, mutually unweldable steels of different quality. Tine sides are joined to inserts by rivets. Chisel used in this working tool may be of various versions and is adapted for embracing tine lower cut. Such construction allows fodder crop yield to be increased and water erosion of irrigated soil to be reduced. EFFECT: increased efficiency, improved yield and reduced damage to soil. 24 cl, 15 dwg