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| Number | Title | Issue Date |
| 7718061 | Apparatus for inhibiting fines carryover Apparatus for inhibiting fines carryover in the form of a settlement tank comprising: a filter which divides the tank into upper and lower portions; a fluid inlet in the lower portion for admitting into the tank a fluid with entrained solids; and a fluid outlet in t... | 05/18/2010 |
| 7413649 | Treatment apparatus with modular chemical containing units having one-way valve assemblies A fluid treatment system that includes at least one treatment module (“pod”) with rigid and impermeable inner and outer surfaces, and an annular center passage which is designed to provide an alternative flow path during the pod backwashing process. At least one... | 08/19/2008 |
| 7344640 | Urban runoff water treatment methods and systems The apparatus and methods of the present invention enable efficient and appropriate treatment of Urban Water Runoff, so that the treated Urban water Runoff can be can be introduced into public waterways without contaminating such waterways. The system apparatus util... | 03/18/2008 |
| 7341662 | Distribution and collection headers for a filter bed A filtration vessel has an inlet for inflow into the filtration vessel of liquid media to be filtered, a body of filter media in the filtration vessel, and a drain to receive filtered liquid media for take off from the filtration vessel. The inlet is configured to i... | 03/11/2008 |
| 7294258 | Device for chemically/physically treating drinking water The invention relates to a device for physically treating drinking water, in particular, for reducing the formation of limestone. The invention device comprises at least one water inlet (3b) and at least one water outlet (3c), whereby the... | 11/13/2007 |
| 7288193 | Apparatus for directing fluids through a filter system A fluid distribution system for directing fluids through a filter system. The fluid distribution system ensures proper distribution of fluids during the process of filtering as well as the process of washing a filter bed. The fluid distribution system may be used wi... | 10/30/2007 |
| 7258798 | Potable water treatment plant and method of maintaining same A package plant for treating raw water to yield potable water. The package plant includes an inlet for raw water, followed by an ozonator for disinfecting the water. Next is provided an up flow roughing filter including a chemically active layer, on top. A slow sand... | 08/21/2007 |
| 7252761 | Filtration installation for filtering the water of a water pool A filtration installation for a swimming pool (2) comprising a filter vessel (4) containing a filter bed (5), an inlet pipe (6) extending between the pool and the filter vessel, a return pipe (8) extending between the filter vessel... | 08/07/2007 |
| 7192521 | Filter having a media retaining plate A filtration system that includes a plurality of underdrain blocks arranged to define a plurality of laterals. Each underdrain block defines an interior and an exterior and has an orifice that provides fluid communication between the exterior and the interior. The s... | 03/20/2007 |
| 7178557 | CPVC drain waste and vent fittings A drain, waste and vent (“DWV”) fitting is made from chlorinated polyvinyl chloride. ... | 02/20/2007 |
| 7163621 | Fluidizable device A device for the treatment of an influent with a nonbonded media, and when the media becomes spent, the media is fluidized with a backwash fluid. Concentric inner and outer perforated cylinders contain a column of media therebetween. The influent is passed radially ... | 01/16/2007 |
| 7160446 | Portable spa filter housing with flow splitter A filter housing for a portable spa utilizes a coaxial channel structure at the flow output of the filter housing to separate the water flow from the filter housing. In one embodiment, the water from the filter housing, exiting at the bottom of the housing, is piped... | 01/09/2007 |
| 7157001 | Carbon filtration process and apparatus for removing PCB's and other compounds from wastewater Process and apparatus for treating wastewater from a sewer system including the steps of: (A) removing solids contained in the influent to create solids-depleted preliminary effluent (PrE) and to protect downstream systems from premature failure due to wear from sol... | 01/02/2007 |
| 7147782 | Method and apparatus for metal removal by ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 12/12/2006 |
| 7141164 | Snap locking underdrain block An underdrain block for a filter system comprises a housing that has of a top wall, a bottom wall, a first end wall, a second end wall, a first side wall, and a second side wall. The end walls and the side walls connect the top wall to the bottom wall. The bottom wa... | 11/28/2006 |
| 7138056 | Filter underdrain system for backwash flow and method for measuring same A filter underdrain system and a method for measuring the water flow through the underdrain filter system. The apparatus includes panel members assembled to form a perforate grid on the filter base structure of an underdrain block. The panels are generally rectangul... | 11/21/2006 |
| 7090771 | Filtration system underdrain The invention is directed to a filter underdrain for supporting a filter media between at least two dividers forming at least one cell, which includes at least one porous plate for supporting the filter media for filtering a fluid, the porous plate spanning across a... | 08/15/2006 |
| 7074329 | Lid for an underdrain block A lid for an underdrain block that has a top surface defining an opening for receiving fill material. The top surface forms a ridge circumscribing the opening, the lid comprising a top, a bottom and a peripheral edge, the peripheral edge comprising a rim adapted to ... | 07/11/2006 |
| 7063787 | Filter media retaining cap and hold down grid The invention recites a filtration tank including a chamber for holding liquid to be filtered, the filtration tank includes a fluid inlet for providing liquid to the chamber. The filtration tank further includes a fluid outlet and at least one filter block disposed ... | 06/20/2006 |
| 7048857 | Method and apparatus for metal removal ion exchange The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing solid particle... | 05/23/2006 |
| 7045067 | Method and apparatus for increasing filter contaminant loading capacity The filter contaminant loading capacity of a depth granular media filter is increased by imposing a so-called “back-slip” on the filter bed. At intervals between normal backwashing, a volume of liquid is passed upwardly through the media bed under flow condition... | 05/16/2006 |
| 7029578 | Water treatment system A system suitable for the elimination of Cryptosporidium oocysts from water includes a filter bed comprising four layers of inert particulate material such that, from the top layer (first layer) to the bottom layer (fourth layer), the coarseness of the partic... | 04/18/2006 |
| 6991726 | Filter having a media retaining plate The invention recites a filtration system including a block including a first wall and a second wall substantially parallel to the first wall. A top surface that is substantially perpendicular to the first wall is disposed between, and coupled to, the first and seco... | 01/31/2006 |
| 6989096 | Apparatus for directing fluids through a filter system A fluid distribution system for directing fluids through a filter system. The fluid distribution system ensures proper distribution of fluids during the process of filtering as well as the process of washing a filter bed. The fluid distribution system may be used wi... | 01/24/2006 |
| 6972091 | Ion exchange resin plant An ion exchange resin plant for the demineralizing or softening water with an arrangement that allows the plant to operate continuously. The plant tank is divided into to two separate compartments that work simultaneously. One compartment effects water demineralizat... | 12/06/2005 |
| 6966987 | Tangentially fed media filter method and apparatus A water treatment device for purifying process water by filtration comprising a housing containing a filter media, having a bottom gravel bed and an upper silica bed, and a fluidizer for backwashing the filter media. Process water is tangentially introduced and caus... | 11/22/2005 |
| 6951609 | High-purity water producing apparatus A module filled with an organic porous ion exchanger is placed midway on a pipe for transporting high-purity water to be supplied to a point-of-use. As the organic porous ion exchanger is used an organic porous ion exchanger having a three-dimensional mesh structure... | 10/04/2005 |
| 6942795 | Modular filter system and method of repairing and/or replacing components thereof A modular filter system and a method of repairing and/or replacing one or more components thereof. The modular filter system includes a traveling backwash hood assembly and a plurality of filter cells having media contained therein. The traveling backwash hood assem... | 09/13/2005 |
| 6936176 | Transportable water treatment system A transportable water treatment system comprising: an inlet adapted to receive water having a pressure of between 10 to 60 psig, a primary regenerable filter connected so as to receive water that has flown through the inlet, the primary regenerable filter configured... | 08/30/2005 |
| 6921481 | Automatic backwash filter system The invention is directed to an automatic backwash filter system that includes at least one influent port for introducing a fluid to the filter; a plurality of partitions forming a plurality of compartments for holding a filtering media for filtering the fluid; at l... | 07/26/2005 |
| 6843920 | Ion exchange system using U-tube principle This invention is a liquid separation system using ion exchange resin, adsorbent resin and catalytic resin based on U-tube principle. It is shown that relatively low fluid velocity is sufficient to maintain the resin bed in compacted state during the operation as we... | 01/18/2005 |
| 6841069 | High rate filter and high rate filtration method using the filter The present invention relates to the raw water-filtering technical field, and is to provide a high speed filtering apparatus which can filter a great amount of raw water containing suspended substances (SS) at a high concentration at a high speed. Floating filter me... | 01/11/2005 |
| 6830684 | Integrated liquid and gas distribution device for underdrain block laterals The invention recites a filter comprising a block including an outer wall defining an inner chamber and a block exterior, and a conduit having a conduit wall, a first conduit end, a second conduit end, and an inner flow path providing fluid communication between the... | 12/14/2004 |
| 6821435 | Water purifying system The invention relates to a system for water purification comprising at least two units, of which the first unit comprises at least one filter unit (1) which consists of a container (2) containing a filter bed (3) of zeolite, and of which the sec... | 11/23/2004 |
| 6821445 | Rainwater-treating apparatus in combined sewer system and backwashing method therefor The present invention is aimed at treating rainwater in a combined sewer system, while enabling removal of a majority of pollution substances even if a large amount of entering rainwater. The invention relates to a rainwater-treating apparatus in a combined sewer sy... | 11/23/2004 |
| 6797166 | Underdrain apparatus A filter underdrain apparatus and a method for manufacturing such apparatus. The apparatus includes a cover member, a water orifice member and a bottom member, each being individual pieces. The cover is placed over the water orifice member and connected thereto by w... | 09/28/2004 |
| 6773589 | Method and apparatus for removing particulate contaminants from commercial laundry waste water A filtration apparatus includes a tank having an upper chamber and a lower baffle, layers of stone and carbon between the upper chamber and the lower baffle, a water inlet to the upper chamber, and a water outlet below the lower baffle. The upper chamber is divided ... | 08/10/2004 |
| 6740237 | Low profile extruded underdrain An improved underdrain block for an underdrain system supporting a filter media bed in a liquid filtration system is provided. The underdrain blocks are preferably made of an extrudable polymeric material that is extruded in relatively long sections to provide light... | 05/25/2004 |
| 6733670 | Apparatus and method for rehabilitating a traveling bridge filter underdrain A porous media support plate module may be used to construct a new filter underdrain or to rehabilitate an existing filter underdrain. A porous plate replacement module may be inserted between two existing cell dividers to replace a damaged porous media support plat... | 05/11/2004 |
| 6616852 | Modular filter system A modular filter system having a mechanism for performing a filter to waste step on the last cell of a multi-cell system following backwashing. A method of operating a modular filter system in which a filter to waste step is performed on the last cell of ... | 09/09/2003 |
