Patent ID: 8480013

Claim:
A spray device for spraying water over a designated area, said device including: a spray plate including a central water impingement region and a water dispersion surface extending away from said central region and formed as a downwardly facing, substantially cone-shaped, recess in the spray plate, said central region having a center; a liquid outlet to direct a stream of liquid from a pressurised source towards the central region of the spray plate to impinge there-against; and a support frame to maintain the spray plate in spaced apart relation to and in alignment with the liquid outlet, characterised in that the water dispersion surface includes flow deflection means to change the direction of flow of the water as it flows over the water dispersion surface to produce a substantially uniform spray pattern from the spray plate and thereby provide uniform water distribution over the designated area, wherein the flow deflection means includes a plurality of depressions formed in the water dispersion surface, the plurality of depressions being arranged in circular rows, each circular row having a pitch circle centred on a vertical central axis passing through the spray plate, the depressions in any one row being staggered with respect to the depressions in an adjacent row, the depressions being closed-bottom depressions positioned at different distances from the center of the spray plate, the depressions in each said row being equally spaced and overlap with adjacent depressions in an adjacent row in both circumferential and axial directions.