Laminar stream spout attachment

DETAILED DESCRIPTION A spout attachment in accordance with the invention provides a laminar stream which is free of turbulence and so soft that it is essentially splash free without aeration.
The attachment includes a housing defining a closed, nonapertured sidewall about a central passage having an inlet end and an outlet end longitudinally spaced downstream from the inlet and, at least two longitudinally spaced-apart, parallel flat plates positioned within and extending across the central passage, each of the plates having small apertures therethrough distributed substantially uniformly throughout the plates, and at least one longitudinally spaced screen positioned within and extending across the central aperture, the screen or screens being longitudinally spaced downstream from the plates and parallel therewith.
The central passage has substantially straight and smooth sidewalls in the longitudinal direction and a substantially constant crosssectional area throughout its length.
A large number of apertures are uniformly distributed throughout each plate to provide a substantially uniform flow velocity profile across the entire central passage and have a total aperture area between 30% and 35% of the total area of each plate.
To obtain the desired flow velocity profile, the apertured plates are preferably separated by a distance of at least approximately one aperture diameter, but no more than about 21/2 to 3 aperture diameters.