Patent ID: 8905325
Filing Date: 2014-12-09
Classification: B05B

Abstract:
1. A spraying device for spraying a liquid coating product comprising a spraying member, means for rotating said spraying member and means for supplying coating product to said spraying member, wherein said spraying member comprises an outer cup and an inner cup, each cup having a spraying edge, an inner distribution surface for distribution of the same coating product and an outer surface, the inner cup being placed radially inside the outer cup, while an annular volume defined between the inner distribution surface of the outer cup and the outer surface of the inner cup has a decreasing thickness between a first thickness value, taken near the zone of inlet into the volume, and a second thickness value, taken at the spraying edge of the outer cup, and a single central supply means for supplying the same coating product to both inner distribution surfaces of the cups from a back face of the spraying member, wherein the central supply means of the spraying member comprise a distributor provided with an orifice aligned on an axis of symmetry of the inner surfaces and outer surfaces of the cups, this orifice being designed to supply the inner distribution surface of the inner cup with coating product, and the diameter of said orifice is less than or equal to the internal diameter of the downstream end of the means for supplying coating product.