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| Number | Title | Issue Date |
| 7722762 | Horizontally traveling water screen A horizontally traveling water screen for filtering debris from a wide flowing stream. The water screen, which may be realized by a foraminous modular plastic conveyor belt, is formed in an endless loop trained between drive and idle sprockets rotatable on generally... | 05/25/2010 |
| 7510650 | Perforated plate element screen with sealed element design A filtering device suitable for filtering a flow of fluid in a channel includes a plurality of filter elements coupled to one another to define a filter loop. The filter loop is configured to position a filter element in the channel to filter a portion of the flow o... | 03/31/2009 |
| 7393451 | Water screen system with compressible boot seal A compressible boot seal for sealing the side of a vertical traveling water screen with flights. The boot seal is formed by a U-shaped, bent nylon plate having a bottom base that resides in the boot section at the lower end of the traveling water screen and two upwa... | 07/01/2008 |
| 7364652 | Screening apparatus Screening apparatus (101,901) for use at an overflow weir (301, 902) in a sewerage system. The apparatus comprises a continuous moving screen band (201, 902) and a band cleaning mechanism (608). A first portion (801) of the screen ... | 04/29/2008 |
| 7344638 | Filter grid assembly A filter apparatus separates fine particles such as pine needles, threads, hairs and seeds from a liquid influent. A rotating grid assembly has multiple grid sections mounted by top-to-bottom connected links, supporting a filter media having specified openings suffi... | 03/18/2008 |
| 7326335 | Apparatus for removing solids from water in canal There is disclosed an apparatus for removing solids from water in a canal during or immediately after a rainstorm. The apparatus includes a plurality of filters and a carrier. The filters filter the solids from the water while moving in and taking impact from the wa... | 02/05/2008 |
| 7326336 | Water intake rotary screen The water intake rotary screen comprises a mobile filter designed as an endless loop formed of a succession of flexible and articulated filter panels. It is associated with a suction system adapted to generate a local contraflow through the filter to take up success... | 02/05/2008 |
| 7300572 | Water screen A traveling water screen comprising an endless foraminous belt with flights. The foraminous belt forms a water screen extending from a lower end in a flowing stream to an upper end above the surface of the stream. The stream flows through openings in the foraminous ... | 11/27/2007 |
| 7232036 | Waste collection system for separating liquid waste from solid waste According to one aspect of the invention, there is provided a waste collection system for separating liquid waste from solid waste which includes a conveyor having an upper conveyor roller, a lower conveyor roller and an endless conveyor belt extending around the co... | 06/19/2007 |
| 7229560 | Sack-based processes for recovering oil floating on water One or more water- and oil-porous containers or sacks are made of a pair of mesh sheets affixed together and stiffened around their perimeter. The sacks can be partially filled with a multitude of tubular bodies made of an oil-entrapping polymer, which have their lo... | 06/12/2007 |
| 7220361 | Torque-limited drive system, method, and apparatus for a fluid screening system A drive system for driving a screen in a fluid screening system comprises an electric gear motor equipped with a mechanical torque limited coupling. The system is sized to provide the torque required to drive the screen throughout the desired speed range, as well as... | 05/22/2007 |
| 7135109 | Filter screen assembly A fine filter screen assembly includes a frame assembly and a rotatable shaft supported in the frame. A drive is configured to controllably rotate the shaft and at least one drive drum is positioned on the shaft for rotation therewith. The drive drum has an external... | 11/14/2006 |
| 7094338 | Method of making and using a filter in the form of a block of agglomerated copolymer fragments One of the exemplary filter systems described includes a bracket and a filter module that can be suspended from the bracket by a plurality of flexible supports. The bracket can support the filter system beneath the grate of a storm drain without the need for the fil... | 08/22/2006 |
| 7048850 | Water screen A traveling water screen comprising an endless foraminous belt with flights. The foraminous belt forms a water screen extending from a lower end in a flowing stream to an upper end above the surface of the stream. The stream flows through openings in the foraminous ... | 05/23/2006 |
| 7048878 | Process of forming oil-absorbent bodies A process for forming an oil-sorbent composition of matter with bound combinations of styrene-butadiene-styrene (SBS) and ethylene propylene diene monomer (EPDM) utilizes a low-temperature extrusion process. The SBS, or both materials, may be in the form of multitud... | 05/23/2006 |
| 7014754 | Tilt-out frame for a filter screen A filter screen that is used in filtering water and that includes a frame and a grid assembly that is supported by the frame for movement. The grid assembly includes a continuous unbroken drive chain having a guide link, and a screen panel. The screen panel is coupl... | 03/21/2006 |
| 6994785 | Removable grid for filter element screens A fine filter screen assembly comprising a length of filter screen having a relatively fine filtering surface and terminating at opposite ends with opposed end shafts. Generally open connecting means interconnect the opposed end shafts to define a continuous loop st... | 02/07/2006 |
| 6964541 | Fish safe screened water diversion apparatus An apparatus for separating animated objects such as fish or other objects between a non-diverted and diverted fluid stream. Embodiments may include a screen or similar selective pass through device that is arranged in a manner that is generally horizontal (more hor... | 11/15/2005 |
| 6942789 | Filter screen assembly A waste water filter screen assembly that has a substantially open foot section to promote more efficient flow through. The rotating grid is generally free hanging. The present invention further provides a drive assembly with square, high friction drive drums mounte... | 09/13/2005 |
| 6733663 | Waste water treatment washer compactor system A wastewater treatment washer compactor system having in-channel motorized screen for installation in an influent channel and removal of screenings from the influent stream; at least one washer and at least one compactor for washing and dewatering the screenings; an... | 05/11/2004 |
| 6719898 | Sieving device The invention relates to a sieving device for mechanically separating and extracting solid bodies or solid matter from a liquid current, in particular, to sieve gratings for process or effluent currents or for use in sewage treatment plants or hydroelectric power st... | 04/13/2004 |
| 6709578 | Tilt-out frame for a filter screen A filter screen that is used in filtering water and that includes a frame and a grid assembly that is supported by the frame for movement. The grid assembly includes a continuous unbroken drive chain having a guide link, and a screen panel. The screen panel is coupl... | 03/23/2004 |
| 6426009 | Travelling screen with travel pause for improved cleaning of screen and method of implementing same A travelling screen and screening method minimize reintroducing debris to liquid downstream of a screen while achieving the relatively high efficiency of fixed bar screens. A filter surface is defined by a pair of planar plates, each of the plates having ... | 07/30/2002 |
| 6294085 | Sewage screening apparatus A sewage screening apparatus which receives, in use, a sewage flow comprising a screen arrangement having a continuous belt screen for capturing screenings contained within the sewage flow to enable their subsequent removal therefrom. The apparatus also i... | 09/25/2001 |
| 6280612 | Revolving screening rack, supporting frame for a revolving screening rack and a control shackle of a screening element The invention relates to a revolving screening rack with a driveable endless screening belt formed by a plurality of screening elements which in each case have a plurality of elongate plates arranged parallel to and at a distance from one another, a bar-s... | 08/28/2001 |
| 6267880 | Mechanical screen, in particular filter apron of a chain filter A mechanical screen employs at least one filter chamber which includes a chassis in the form of a frame and a filter panel disposed transversely in the opening of the chassis and appropriately attached to it. Clipping elements between the filter panel and... | 07/31/2001 |
| 6187184 | Traveling water screen having improved basket A basket for a traveling water screen which includes a top rail with a pair of spaced apart end members at opposite ends of the top rail which are joined to the top rail. A water screen extends between the end members and includes an upper edge portion su... | 02/13/2001 |
| 5993651 | Water influent particle removing apparatus An endless screen lifts fecal matter and sewer influent debris from an influent channel. The endless screen is powered by an externally positioned air cylinder driving a pawl and rachet to move the screen in an elliptical path. A tank positioned below a t... | 11/30/1999 |
| 5919358 | Continuous-belt drilling mud separation system A continuous-belt drilling mud separation unit is removably mounted in a box-like housing disposed in the flow path of drilling mud or drilling fluids and is operated by a motor on the housing. The separation unit includes a generally rectangular frame, a... | 07/06/1999 |
| 5800701 | Apparatus, components and a method for the filtering of liquid An endless filter chain for filtering a liquid, such as sewage, which flows along a drainage duct is provided. The filter chain comprises strainer elements and connecting links interconnected to allow the strainer elements to pivot about respective axes o... | 09/01/1998 |
| 5788839 | Traveling self-cleaning fish screen A traveling water and fish screen device is provided for separating debris from channels of flowing of water. The device includes a carriage that is placed in the water flow and a screen mounted in the carriage which utilizes a continuous band of speciall... | 08/04/1998 |
| 5676829 | Screen A screen assembly is described which comprises a flow channel along which sewage is intended to flow, in use, a continuous flexible belt entrained around roller or wheel means and projecting into the channel, and means for driving the belt. The belt is pe... | 10/14/1997 |
| 5641398 | Device for removing screened material from a liquid flowing in a flume A device for removing floating and suspended debris from a liquid flow passed through a liquid flow flume (3) is disclosed, the device including a separator (9) positioned within the liquid flow flume at an angle with respect to the flume and extending ac... | 06/24/1997 |
| 5618415 | Method for removing debris from a free flowing water system A method for removing debris from a free flowing water system (100) using an improved filter apparatus (10) is described. The apparatus includes a rail (12) which is mounted adjacent the water supply intake opening (102) and a continuous belt (36) made of... | 04/08/1997 |
| 5573659 | Filter apparatus An improved filter apparatus (10) for removing debris from a free flowing water system (100) is described. The apparatus includes a rail (12) which is mounted adjacent the water supply intake opening (102) and a continuous belt (36) made of chain links (3... | 11/12/1996 |
| 5565093 | Conveyor-band filter apparatus Conveyor-band filter apparatuses, so-called Paternoster filter rakes, which serve primarily for the mechanical cleansing of flowing sewage, are to be made capable by the invention of removing not only the normal filtered material, but also coarser fragmen... | 10/15/1996 |
| 5551137 | Method for assembling waste materials filtering apparatus A method for assembling an apparatus that removes solid waste material from a stream of water. The apparatus sits in a channel within which the water containing waste material flows. A plurality of vertically oriented, laterally spaced apart, rotating scr... | 09/03/1996 |
| 5501793 | Traveling water screen including improved basket A traveling water screen including a basket having an upper lip beam and a lower lip beam, the lower lip beam including an elongated upwardly opening channel upstream of the water screen, the lower lip beam including an upstream wall having a lower portio... | 03/26/1996 |
| 5489378 | Differential relief mechanism for a traveling water screen A water pressure relief apparatus in a traveling water screen adapted to be mounted in a channel such that the traveling water screen filters water flowing through the channel. The channel includes an upstream portion and a downstream portion. The traveli... | 02/06/1996 |
| 5468376 | Pressure sealed chain A sealed roller assembly (10) for hingeably connecting pairs of link plates (34) to form a chain (11), comprises a roller (12), a bushing (14) rotably mounted inside the roller (12), and a pin (16) rotably mounted inside the bushing (14). One pair of link... | 11/21/1995 |
