Patent ID: 6469308
Filing Date: 2002-10-22
Classification: A61L,C02F

Abstract:
An ultraviolet radiation water treatment device for a water cooler tank comprising:a shield plate having a disk shape adapted for attachment to a side wall of a water cooler tank; a shield pipe extending through the center of said shield plate, the pipe having an upper end, the pipe being adapted for extending through a top wall of a water cooler tank, said shield pipe being made from a material opaque to UV radiation; a circular cap attached to the upper end of said shield pipe, the cap having an aperture defined therein; an outer, cylindrical, transparent sleeve having a closed, dome-shaped lower end and an open upper end disposed in said shield pipe, said outer sleeve and said shield pipe defining an outer annular flow channel; a cylindrical, transparent inner sleeve disposed within said outer sleeve and having a closed, dome-shaped lower end and an upper end extending above said outer sleeve, said inner sleeve and said outer sleeve defining an inner annular flow channel; an ultraviolet lamp emitting ultraviolet light at a frequency having germicidal effect disposed within said inner sleeve; and a translucent water inlet tube extending through the aperture defined in said cap, the water inlet tube extending between said outer sleeve and said inner sleeve, the water inlet tube having a discharge opening proximate the lower end of said outer sleeve; wherein influent water enters the water treatment device through said water inlet tube, is discharged proximate the lower end of said outer sleeve, flows upward through said inner annular flow channel, then downward through said outer annular flow channel into a water cooler tank in order to effect at least three passes proximate the ultraviolet ray lamp, whereby influent water is exposed to germicidal ultraviolet radiation for an extended time.