Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8070946 | Underdrain for a filter system for filtering water or wastewater and a method of washing the filter system An apparatus for filtering water and/or wastewater including at least one underdrain lateral. The underdrain lateral is configured to receive a liquid during a filtration cycle and directs a washing fluid through a filter bed of one or more layers of filter media du... | 12/06/2011 |
| 7758750 | Flume for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof A flume for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas and/or a combination of liquid and gas. The flume includes a chamber having a top wall, a bottom wall, a left sidewall and a right sidewall. Th... | 07/20/2010 |
| 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 |
| 7374676 | High rate filtration system A high rate, upflow filtration system is described in which a compressible, fibrous lump filtration media is compressed to adjust the porosity and collector size of the media in the bed and to provide a porosity gradient within the bed proceeding from more porous to... | 05/20/2008 |
| 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 |
| 7332080 | Apparatus for salt free water softening A water softening system and process for softening water on an as needed basis is disclosed. The system and process softens water without the addition of a substitute metal exchange cation. ... | 02/19/2008 |
| 7288194 | Underdrain system An underdrain system having a bottom formed of concrete. The concrete bottom includes a plurality of depressions formed therein. A porous plate is operably associated with at least one of the depressions. An anchor assembly is provided for anchoring the porous plate... | 10/30/2007 |
| 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 |
| 7273555 | Process for continuous ion exchange A process for continuous countercurrent ion exchange comprises piping a contaminated feed stream into a closed loop ion exchange contactor. The contactor is an ion exchange bed that has three or more reaction segments. The segments are comprised of at least an adsor... | 09/25/2007 |
| 7270749 | Pump system A pumping system comprising: (a) an inlet adapted for connection with a supply of low pressure water; (b) a filtration unit in fluid communication with the inlet, wherein the filtration unit filters impurities from the low pressure water so as to discharge a flow of... | 09/18/2007 |
| 7223347 | Apparatus and method for filtering fluids The present invention provides an apparatus and method for filtering fluids with a compressible filter media within at least a portion of a housing inwardly compressible. ... | 05/29/2007 |
| 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 |
| 7166151 | Flow distributor for PSA vessel The present invention is a PSA system having at least one vessel that uses a multi-segmented flow distributor to provide a uniform fluid across the adsorbent bed in the vessel. ... | 01/23/2007 |
| 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 |
| 7022230 | Filtration device The invention relates to a filtering apparatus including, inside a filtering tower (1), a filtering section (r), a liquid collecting section (7) and a liquid feeding section (e). The liquid feeding section (e) includes a diffuser (A) attached to an upw... | 04/04/2006 |
| 7014176 | Fluid distribution system and associated methods A fluid grid system for use with filter systems and other fluid handling devices. Preferably, the fluid grid system is designed such that components thereof may be readily connected to each other without the use of clips or other fasteners. Further, the fluid grid s... | 03/21/2006 |
| 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 |
| 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 |
| 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 |
| 6905286 | Porous pipe and apparatus and method of producing the same A porous pipe having an excellent absorbing and draining function, a producing apparatus capable of producing a porous pipe at high speed and low cost, and a method of producing a porous pipe are provided. The porous pipe is a pipe formed by spirally winding a tape.... | 06/14/2005 |
| 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 |
| 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 |
| 6790345 | Underwater filtration operator An underwater filtration operator which can be suspended in a river, lake, pond or other water body to filter water from the water body. The underwater filtration operator may be electrically charged to discharge impurities in the water body and increase filtering e... | 09/14/2004 |
| 6790351 | Vertical filter A liquid filtering apparatus is placed in a vessel having a bed of filtration material and an intake for introducing unfiltered liquid, that includes a washbox, an airlifting tube extending from the washbox and including an intake end and means for introducing a pri... | 09/14/2004 |
| 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 |
| 6641737 | Vertical filter A liquid filtering apparatus is placed in a vessel having a bed of filtration material and an intake for introducing unfiltered liquid, that includes a washbox, an airlifting tube extending from the washbox and including an intake end and means for introd... | 11/04/2003 |
| 6569327 | 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... | 05/27/2003 |
| 6517724 | Air charged backwashing bioclarifier The present invention provides a floating media biofilter having an economical structure which allows energy efficient and water conserving backwashing of the floating media. The biofilter includes a filter chamber fluidly connected to a charge chamber wh... | 02/11/2003 |
| 6517712 | Descending bed filter An improved vertical filtration unit which includes an airlift and a washbox designed for more efficient washing of dirt particles from the filtration material. The washbox consists of a filter media shield, and a washbox skirt for washing of the filtrati... | 02/11/2003 |
| 6471857 | Filter apparatus with sand filter bed A filter apparatus removes foreign substances contained in raw water by passing the raw water through a filter layer (8) made up of a particulate filter medium disposed in a filter tank (1). The apparatus is made up of: a partition wall (2) provided insid... | 10/29/2002 |
| 6461502 | Apparatus for recovering a specific ingredient in sea water An apparatus for recovering a specific ingredient in sea water, which comprises an adsorbing bed tank, a layer of an adsorbent charged on the bottom portion of the adsorbing bed tank, a sea water intake pipe provided in a bottom portion of the adsorbing b... | 10/08/2002 |
| 6423224 | Filter cartridge assembly for water treatment device A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to th... | 07/23/2002 |
| 6423216 | Biological oxidation filter system A biological oxidation filter system can be used as a pretreatment process in water treatment, or for processing sewage or wastewater by reproducing the purification mechanisms in nature environments. It has a physical screening function and an oxidation ... | 07/23/2002 |
