Patent ID: 6508943
Filing Date: 2003-01-21
Classification: A61M,B01D

Abstract:
A filtering device for removing a filtrate from a liquid, comprising:(a) a hollow stationary housing (H) containing a circular thin disk-shaped chamber including a pair of planar parallel spaced side walls, and an outer liquid channel (13) connected between the outer circumferential edges of said chamber side walls; (b) a rotatably-driven circular disk (1) arranged concentrically within said chamber; (c) a pair of spaced filtering membranes (2a, 2b) arranged within said chamber on opposite sides of said disk, said membranes being spaced from said disk to define a pair of narrow gaps (12a, 12b), respectively, that are in communication with said chamber; (d) said housing side walls containing a pair of opposed annular filtrate channels (9a, 9b) arranged in spaced relation concentrically within said outer liquid channel, respectively, said filtrate channels being arranged on opposite sides of said membranes from said gaps, respectively; (e) means including first inlet means (14) contained in said housing for supplying the liquid to be filtered to said outer liquid channel; (f) means including first outlet means (10, 17) contained in said housing for removing the filtrate from said filtrate channels; and (g) means including second outlet means (15) contained in said housing for removing concentrate from said outer liquid channel.