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| Number | Title | Issue Date |
| 8092674 | Traveling band screen machine A traveling band screen machine (1) is proposed with a careful fish return. To this end, the screen panels (4) each have a fish lifting channel (26) in which fishes (28) in a liquid-filled collecting recess (27) are lifted out of t... | 01/10/2012 |
| 7776212 | Water screen system with boot seal A boot seal for a vertically traveling water screen and a method forming a boot seal. The boot seal comprises a bent plate that extends from an attachment end to a free end. The attachment end is attached to a frame mounted at the bottom of a channel of water flowin... | 08/17/2010 |
| 7575674 | Rotary bar screen device Provided is a rotary bar screen device. The device includes a driving motor, an up/down pair of driving and driven sprockets, left and right transfer chains, a plurality of screen buckets, a removal unit, and a slide plate. The driving motor is provided over a suppo... | 08/18/2009 |
| 7416658 | Elliptical motion drive device for a step screen Disclosed herein is an elliptical motion drive device for use in a step screen. The elliptical motion drive device comprises first and second eccentric wheels coupled to a single drive shaft to be eccentrically positioned to each other. Upon rotation of the drive sh... | 08/26/2008 |
| 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 |
| 7360655 | Material handling system having a scoop wheel A material handling system is provided. The material handling system includes a tank defining a reservoir for receiving a solid material, and a wheel including a plurality of circumferentially spaced apart scoops for scooping solid material from the tank and subsequ... | 04/22/2008 |
| 7357259 | Material classifier having a scoop wheel A material classifier for classifying a liquid-solid mixture containing solid material to be separated is provided. The material classifier includes a tank defining a reservoir for receiving the liquid-solid mixture, and a scoop wheel including a plurality of circum... | 04/15/2008 |
| 7347933 | Self-cleaning intake screen A self-cleaning screen that automatically cleans both the inside and outside surfaces of the cylindrical screen using only the rotation of the cylindrical screen itself. This self-cleaning ability is accomplished by using a fixed brush on the exterior surface of the... | 03/25/2008 |
| 7344637 | Apparatus for removing fine material from a liquid An apparatus serves for removing fine material to be screened from waste water. The apparatus includes a sieve grate (6) and a detaching device (16). The sieve grate (6) is cylindrical, and it is rotatingly driven. The sieve grate (6) all... | 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 |
| 7314572 | Methods of and apparatus for low-angle-tray settling with multi-zone configuration Settleable-particles are separated from a dirty flow of settleable-particles and fluid by trays having a planar section configured with opposed ends and opposed sides, and an entrance edge and an exit edge on opposed ends. The section has opposed side edges, and an ... | 01/01/2008 |
| 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 |
| 7267763 | Water intake screen with circular filter panel A water intake screen with a filter panel includes a frame adapted to be connected to the water intake and a circular filter panel disposed transversely in an opening of the frame, to which it is fastened. The panel includes a wheel extending in a substantially vert... | 09/11/2007 |
| 7189306 | Process of treating lignocellulosic material to produce bio-ethanol This invention relates to a process of treating a lignocellulosic material to produce bio-ethanol. The process includes the steps of: (a) exposing the lignocellulosic material to conditions including a pH not less than about 8, and steam at a first pressure, to prod... | 03/13/2007 |
| 7160443 | Apparatus for removing material from a liquid flowing through a channel An apparatus for removing material from a liquid flowing through a channel includes a sieve grate, a screw conveyor and a detaching device. The sieve grate has an inflow side, an inner side and an outer side. The sieve grate is designed to be cylindrical and to be r... | 01/09/2007 |
| 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 |
| 7097046 | Automatically cleaning filter assembly for a liquid-carrying loop A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filt... | 08/29/2006 |
| 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 |
| 6953524 | Screen assembly for combined sewer overflow weir A screen assembly in which the screen (10) is in the form of an inverted semi-circular trough the foul flow (A) to be screened approaching the underside of the screen so that debris which is filtered falls away from the screen by gravity so minimising blockag... | 10/11/2005 |
| 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 |
| 6913690 | Debris removal system An automatic debris removal system for screening an effluent stream. The automatic debris removal system comprises a support frame positioned proximate the effluent stream, a bucket positionably connected to the frame, and a camming system attached to the support fr... | 07/05/2005 |
| 6754123 | Adjustable current mode differential amplifier for multiple bias point sensing of MRAM having diode isolation A sensing circuit for determining the logic state of each memory cell in a resistive memory array, wherein each memory cell in the resistive memory array has current control isolation and the logic state of each memory cell can be determined relative to a reference ... | 06/22/2004 |
| 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 |
| 6669854 | Stepping screen assembly hydraulically driven A stepping screen assembly bottom portion is located in a liquid waste stream containing solids. The assembly contains a grid structure containing dynamic and static bars horizontally spaced apart. An outer frame on one side of the grid structure contains... | 12/30/2003 |
| 6500331 | Machine for micro-filtering solid particles suspended in a liquid stream The invention relates to a machine for micro-filtering solid particles suspended in a liquid stream comprising: a couple of coaxial filtering discs each rotating round its own axis arranged horizontal and normal to direction of the flow to be treated and ... | 12/31/2002 |
| 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 |
| 6312590 | Mechanically cleanable screen A mechanically cleanable screen for separating liquid from chips and pulp without the screen getting blocked, particularly in the process area where cooking and circulation liquids are removed from a pressure vessel during the production of chemical pulp ... | 11/06/2001 |
| 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 |
| 6270684 | High performance combined sewage overflow and water intake screen A screening device useful in water and waste water treatment plants separates fluid flow into two streams. The screening device is perforated so that solids having a predetermined cross-section will be maintained within a first fluid stream, and a portion... | 08/07/2001 |
| 6251268 | Filtering apparatus The invention relates to a filtering apparatus for removing matter and bodies accompanying a liquid flow. The filtering apparatus includes a number of individual filter elements disposed to be displaced in an endless path. The endless path is formed by on... | 06/26/2001 |
| 6231757 | Apparatus for collecting and removing solid particles from a flowing fluid An apparatus for collecting and removing solid particles from a flowing fluid (5) includes a grid unit (6) including a plurality of stationary bars (1) being arranged to form a stationary bar unit (3), each of the stationary bars (1) including a plurality... | 05/15/2001 |
| 6089790 | Self-cleaning intake screen A self-cleaning intake screen assembly for preventing debris, fish, and other wildlife from being transferred from a waterway such as a lake or river, which includes a conical support structure, a screen and a screen sweeping assembly. The conical support... | 07/18/2000 |
| 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 |
| 5851087 | Self-cleaning intake screen A conical intake screen which is self-cleaned by using four elongate brushes which are slowly driven over its surface by a submersible, programmable electric motor. The invention is preferably placed in the waterway with the axis of the conical screen ori... | 12/22/1998 |
| 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 |
| 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 |
