Patent ID: 6928940

Claim:
Device for the selective metering of seed intended essentially for sowing or reseeding soils and of additives intended essentially for improving and/or treating the soils; said device comprising: a) a hopper ( 1 ) for holding the seed or the additives or both; b) a unit for the selective metering ( 2 , 3 and 4 ) of the seed or of the additives or both originating from the hopper; c) means ( 5 and 6 ), for transferring the seed or the additives or both originating from the metering unit into furrows created in the soil by means of a scarification unit provided with a plurality of discs ( 7 ); wherein the unit for the selective metering of the seed and additives originating from the hopper ( 1 ) comprises: a) a selective metering roll ( 2 ) comprising, longitudinally, a plurality of successive zones (Z), each zone being subdivided into at least two zones (Z 1 and Z 2 ) and provided with means ( 2 A, 2 B and 2 C), suitable for metering the seed or the additives according to their particle size; b) a means ( 3 ) comprising a plurality of openings ( 3 A) separated by solid parts, suitable by the lateral movement of said means ( 3 ) relative to metering roll ( 2 ) for making the seed or additives originating from the hopper ( 1 ) communicate either with the zone (Z 1 ) or with the zone (Z 2 ); c) a means ( 4 ), comprising a plurality of openings separated by solid parts, suitable by the lateral movement of said means ( 4 ) relative to said means ( 3 ) for blocking off to a greater or lesser extent, the openings ( 3 A) of the means ( 3 ).