Patent ID: 9233866
Filing Date: 2016-01-12
CPC Classification: B01D,B04C,C02F

Claim Text:
1. A dual stage filter assembly for use in a fluid cleaning and sludge removal operation, comprising: a body defining an elongated fluid vessel with an upper chamber and a fluidly connected lower chamber; an upper stage centrifugal separator incorporated into said upper chamber; an inlet pipe communicated with said upper chamber for introducing a dirty fluid flow to said centrifugal separator; a lower stage baffle filter having a cylindrical shape with a central interior passageway incorporated into said lower chamber in fluidic communication with a lower end of said separator; and a fluid collection and redirection element interposed between said upper stage separator and said lower stage baffle filter, said fluid collection and redirection element further including a convex collection element and an underneath situated funnel; a clean fluid outlet communicating with an open interior of said upper stage separator and encouraged by a negative pressure zone created within said upper chamber resulting from increase in velocity of said fluid communicated through a descending spiral profile; said fluid collection and redirection element communicating with a separate dirty fluid outlet from said upper separator which flows over an outer periphery of said convex element and, subsequently, is collected within said funnel for passage through a bottom orifice associated with said funnel, said fluid passing vertically through said central interior passageway of said cylindrical filter, and outflowing through a wall of said filter and through at least one further outlet extending from said lower stage filter.