초록 ▼

A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), the fluid passing through the element (50) an

A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), the fluid passing through the element (50) and out the fluid outlet (28). The element has a generally cylindrical configuration with the permeable material forming a plurality of elongated, radially extending pleats (98). The pleats are supported by spacers (81) having a plurality of blades (102) attached to a web (106) with channels (104) therebetween. The element (50) is used as a septum for supporting a diatomaceous earth precoat. A regeneration piston (76) creates fluid flows within the filter that cause the element (50) to flutter, thereby displacing the diatomaceous earth precoat from the septum for regeneration.

대표청구항 ▼

[ I claim:] [1.] A fluid filter, comprising:(a) a hollow housing having a fluid inlet and a fluid outlet;(b) a filter element formed of fluid permeable material disposed within said housing for filtering fluid entering said fluid inlet passing through said element and out said fluid outlet, said ele

[ I claim:] [1.] A fluid filter, comprising:(a) a hollow housing having a fluid inlet and a fluid outlet;(b) a filter element formed of fluid permeable material disposed within said housing for filtering fluid entering said fluid inlet passing through said element and out said fluid outlet, said element having a generally cylindrical configuration with an axial hollow, said permeable material forming a plurality of elongated, radially extending pleats, each of said pleats having a pair of side walls spaced apart along substantially the entire radial length of said pleat and terminating proximate said axial hollow, each of said pleats spaced from an adjacent said pleat where said side walls terminate proximate said axial hollow, said fluid permeable material extending circumferentially between adjacent pleats and constituting a portion of the filter element for filtering fluid; and(c) a piston reciprocable within said axial hollow for creating a reverse flow through said element. [30.] A diatomaceous earth filter, comprising:(a) a hollow housing having a fluid inlet and a fluid outlet;(b) a filter septum of flexible, fluid permeable material for supporting a precoat of diatomaceous earth and disposed within said housing for filtering a pressurized stream of fluid entering said fluid inlet, passing through said precoat and said septum and out said fluid outlet, said filter septum being a generally cylindrical, pleated cartridge with a perforated core cylinder; and(c) a piston axially reciprocable within said core cylinder to simultaneously induce flows out of said perforated core cylinder in areas approached by said piston and into said core cylinder in areas from which said piston retreats when said piston is reciprocated creating a media regenerative flow of fluid within said filter distinct from said flow attributable to said pressurized stream, said media regenerative flow disturbing said precoat on said septum at least in part by bending said flexible septum.