Patent ID: 7380730
Filing Date: 2008-06-03
Classification: A01M

Abstract:
1. A tunnel sprayer for rows of plants, the sprayer having opposing shields which substantially cover the whole heights of the opposing sides of at least one row, and which comprise fans to create a flow of air which in delivery travels parallel to a flow of treatment liquid sprayed on to each side of the row by at least one corresponding bar with nozzles and which in intake sucks in the air and treatment liquid delivered by the shield operating on the other side of the row, so as to avoid the dispersion due to wind drift and limit losses in the air and drips of excess liquid on to the ground, wherein, in each shield an area of the mouth or mouths for the delivery of the pressurized fluid is suitably smaller than the sum of an area of the apertures occupied by the fans, in such a way that the delivery mouth or mouths give out corresponding air flows whose flow rates and pressures are uniformly distributed and substantially constant over a whole height of this delivery mouth or these delivery mouths, and wherein, in each shield there are two adjacent and parallel mouths for the delivery of pressurized air towards the row of plants, an inner mouth and an outer mouth, and in that at least one bar with the nozzles for spraying the plant treatment liquid is located in the inner mouth, in such a way that the outer delivery mouth also forms an effective protective barrier against drift phenomena caused by any presence of wind in the environment.