SPADE Russian patent published in 1999 - IPC

FIELD: agriculture, soil redigging equipment used for cultivation of garden or other small plots. SUBSTANCE: spade has shank 1, supporting part 2 rigidly attached to shank rear side, hinge joint 3 with upper fold 4 rigidly attached to shank 1, pedal 6 rigidly attached to lower fold 5 of hinge joint 3 and adapted for facilitating rotation of fold 5 about hinge of hinge joint 3. Pedal 6 has digging part 7 mounted for rotation about shaft 8. Digging part 7 is made tubular and provided with sleeves 9 arranged on upper portion of digging part 7 and serving as slider bearings. Digging part 7 is mounted by attachment part having washer 10 and splint 11 which are mounted on cylindrical shaft 8. Digging part 8 is rotated about cylindrical shaft 8 by means of spindle 12 arranged in parallel with hinge of hinge joint 3 and carrying spade rotating lever, which is loosely positioned on spindle 12. Washer is welded to front part of spade with 45-deg offset relative to cylindrical shaft 8 and is connected by flexible member with lower end of spade rotation lever. Strip-type spring 16 mounted on cylindrical shaft 8 has one end rigidly attached to shaft 8 and other end fixed to upper portion of digging part 7. Supporting part 2 has projection 17 preventing it from displacement during turning of digging part 7 relative to hinge of hinge joint 3. Such construction allows digging operation to be conducted by user without necessity for inclining and raising spade from ground by hands and turning of digged soil layer through 180 deg. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 5 dwg