DRILL Russian patent published in 1997 - IPC

FIELD: agricultural engineering; precision drills. SUBSTANCE: drill has housing 1 with two disks mounted on horizontal shaft. Several rows of cells 4 are made on cylindrical surface of disks. Each disk has base 6 with fitted on rings made up of parts 7,8,9 and 10 with semicells on cylindrical portion. Spacer rings 11 which have no cells are mounted on base 6. Three-dimensional cover plates 21 made of polymeric material are installed above spacer rings 11 flush with cylindrical surface of disks. Cover plates 21 have longitudinal holes to change their position relative to axis of disk 3. Saw-like slots are made on spacer rings and on part of rings on their end face surfaces. EFFECT: reduced damage to seeds. 2 cl, 3 dwg