Filter device with permeable corrugated grid panel

Claim 2

A filter device for separating foreign material from a liquid flow, said device comprising, a tank for receiving said flow of said liquid and foreign material through an inlet means, and outlet means for discharging said foreign material and the filtered liquid, a grid panel having permeable corrugated surface carried within said tank to allow passage of said liquid while retaining said foreign material to collect on said corrugated surface, said permeable corrugated surface including a series of permeable filter surfaces interconnected at respective tops and bottoms to form acute angles between said permeable filter surfaces at each such connection, and a conveyor operatively connected to said tank, said conveyor having a scraper plate with an edge to complementally engage said grid panel corrugated surface and remove said foreign material collected thereon.

Claim 3

A filter device as defined by claim 1 and further characterized by, an inclined ramp carried within said tank, said ramp having a lower end connecting with said grid panel and an upper end interfacing with space external of said track, said ramp having an impermeable surface to provide support for said foreign material as scraper plate travels over said ramp surface to move said foreign material up said ramp for disposition in said space external of said tank.

Claim 4

A filter device as defined by claim 1 and further characterized by, a sheet of filter media positioned between said grid panel corrugated surface and said conveyor scraper plate with said foreign material being retained by said media as said liquid flows through said media and said grid panel with said sheet being movable by said conveyor scraper plate.

Claim 5

A filter device for separating foreign material from a liquid flow, an improvement in said device comprising, a tank having a permeable bottom area formed with a series of longitudinal corrugations, said corrugations including a series of filter surfaces interconnected at respective tops and bottoms to form acute angles between said permeable filter surfaces at each such connection, an end of said bottom area joining an impermeable inclined ramp section having like corrugations extending from said bottom area to an upper portion of said tank, said tank having inlet means to receive said liquid flow and outlet means to discharge said foreign material and filtered liquid, and conveying means carried by said tank for removing said foreign material collecting on said bottom area and transporting said material up said inclined ramp, said means including flights positioned transverse to said bottom area and ramp corrugations with said flights having a scraper plate formed to complementally fit within said corrugations, wherein said foreign material is retained on said permeable bottom area as said liquid flows from said device in a cleaned condition.

Claim 6

A filter device for separating foreign material from a liquid flow, an improvement in said device comprising, a tank having a permeable bottom area formed with a series of longitudinal corrugations, said corrugations including a series of filter surfaces interconnected at respective tops and bottoms to form acute angles between said permeable filter surfaces at each such connection, an end of said bottom area joining an impermeable inclined ramp section having like corrugations extending from said bottom area to an upper portion of said tank, said tank having inlet means to receive said liquid flow and outlet means to discharge said foreign material and filtered liquid, and conveying means carried by said tank for removing said foreign material collecting on said bottom area and transporting said material up said inclined ramp, said means including flights positioned transverse to said bottom area and ramp corrugations with said flights having a scraper plate formed to complementally fit within said corrugations, wherein said foreign material is retained on said permeable bottom area as said liquid flows from said device in a cleaned condition.

Claim 7

A filter device as defined by claim 4 and further characterized by including, disposable filter media means comprising a media sheet suppliable from a roll external of said tank, said media sheet interfacing between said conveying means scraper plates and said bottom and ramp corrugations for retaining said foreign material, said media means and retained foreign material movable up said ramp upon selective activation of said conveying means.

Claim 8

A filter device as defined by claim 5 and further characterized by including, disposable filter media sheet pleating means, said means located between said roll and said tank and comprising an upper and a lower guide wire set having ends carried in spaced upper and lower blocks at an entrance and exit end of said device, said wire sets spaced at said entrance end to allow said sheet to enter said device in a flat condition with said set merging and becoming offset at said exit end to transform said flat condition of said sheet to a pleated condition, wherein said sheet in said pleated condition merges with said conveyor flight at a point proximate a merger of said flights with said bottom area.

Claim 9

A filter device particularly adapted for receiving a flow of a foreign material-liquid mixture, through an inlet means separating said foreign material from said liquid to allow said liquid to be discharged from said device in a foreign material-free condition, through an outlet means said device comprising, a tank defined by spaced sidewalls joined at one end by a vertical end wall and at an opposite end by an inclined end wall and a bottom, a pair of support members carried by said bottom and positioned one each adjacent to said sidewalls, a liquid pervious grid panel formed with a series of longitudinally positioned, vertical corrugations, said panel having outside edge corrugated portions connecting with said support members, a corner section having impervious arcuate corrugated plate with a lower end of said plate aligning and mating with a forward end of said grid panel corrugations, said corner section joining with said bottom and said end wall to define in part a discharge header connecting with clean liquid inner space formed between said grid panel and said tank bottom for movement of said liquid having passed through said grid panel, a ramp section having impervious corrugations and carried on said tank inclined end wall, said section having lower arcuate end aligning and mating with a rear end of said grid panel corrugation, and an upper end of said section connecting with a foreign material discharge chute carried by said tank exterior of said tank inclined end wall, and a conveyor assembly comprising two spaced chain loops rotatively carried by pairs of chain sprockets respectively keyed to shafts carried by said tank sidewalls with a lower portion of each said chain loop respectively carried in part by said support members, and a series of flight assemblies transversely positioned between said chain loops and intermittently spaced thereabout, said assemblies having ends operatively connected to said chains and a scraper plate formed with an extending corrugated edge to complementally interact with said corrugation of said corner section, said grid panel and said ramp section, wherein said foreign material-liquid mixture may be introduced into said tank from a convenient inlet, said liquid flowing through said grid panel into said clean liquid inner spaces and to said discharge header, said foreign materials being retained by said grid panel to collect and form a cake thereon, and said flight conveyor scraper plates moving over said grid panel corrugations to remove said collected foreign material and move said foreign material up said inclined ramp section for disposition through said discharge chute.

Claim 10

A filter device particularly adapted for receiving a flow of a foreign material-liquid mixture, through an inlet means separating said foreign material from said liquid to allow said liquid to be discharged from said device in a foreign material-free condition, through an outlet means said device comprising, a tank defined by spaced sidewalls joined at one end by a vertical end wall and at an opposite end by an inclined end wall and a bottom, a pair of support members carried by said bottom and positioned one each adjacent to said sidewalls, a liquid pervious grid panel formed with a series of longitudinally positioned, vertical corrugations, said panel having outside edge corrugated portions connecting with said support members, a corner section having impervious arcuate corrugated plate with a lower end of said plate aligning and mating with a forward end of said grid panel corrugations, said corner section joining with said bottom and said end wall to define in part a discharge header connecting with clean liquid inner space formed between said grid panel and said tank bottom for movement of said liquid having passed through said grid panel, a ramp section having impervious corrugations and carried on said tank inclined end wall, said section having lower arcuate end aligning and mating with a rear end of said grid panel corrugation, and an upper end of said section connecting with a foreign material discharge chute carried by said tank exterior of said tank inclined end wall, and a conveyor assembly comprising two spaced chain loops rotatively carried by pairs of chain sprockets respectively keyed to shafts carried by said tank sidewalls with a lower portion of each said chain loop respectively carried in part by said support members, and a series of flight assemblies transversely positioned between said chain loops and intermittently spaced thereabout, said assemblies having ends operatively connected to said chains and a scraper plate formed with an extending corrugated edge to complementally interact with said corrugation of said corner section, said grid panel and said ramp section, wherein said foreign material-liquid mixture may be introduced into said tank from a convenient inlet, said liquid flowing through said grid panel into said clean liquid inner spaces and to said discharge header, said foreign materials being retained by said grid panel to collect and form a cake thereon, and said flight conveyor scraper plates moving over said grid panel corrugations to remove said collected foreign material and move said foreign material up said inclined ramp section for disposition through said discharge chute.

Claim 11

A filter device as defined by claim 7 and further characterized by including flight scraper plate cleaning means comprising, a pair of spaced inverted L-shaped brackets attached to a platform carried by said tank, a rod carried between said bracket and positioned transversely to said tank, and a scraper blade attached to a pair of spaced straps pivotally attached to said rod, said blade aligned with said flight conveyor scraper plates moving about said drive sprockets and positioned to contact said scraper plate and move over said plate to produce a cleaning action.

Claim 12

A filter device as defined by claim 7 and further characterized by said corrugations having a wavy horizontal configuration.