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| Number | Title | Issue Date |
| 8021544 | Wastewater screening device A screening device for wastewater overflow weirs and the like includes a perforate screening member through which wastewater flows from a bottom to top sides thereof, with a frame and a plurality of screening rods arranged in a laterally spaced apart, mutually paral... | 09/20/2011 |
| 7972503 | Adjustable pin rack systems for cog rake bar screens A support plate is used in a cog rake bar screen of a wastewater treatment facility and the cog rake bar screen includes an adjustable pin rack system coupled to a frame. The support plate includes a plate having a centerline extending between opposite side walls of... | 07/05/2011 |
| 7481920 | Fine-screened grid Disclosed is a fine-screened grid having a screening grate. A slider is guided on the grid grate to remove debris therefrom. The slider is connected to a slider arm which, together with a guide lever, forms a knee lever. The configuration enables the slider to pass ... | 01/27/2009 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7147784 | Hydraulic or pneumatic drive system, method, and apparatus for a fluid screening system A drive system for driving a screen in a fluid screening system comprises a hydraulic or pneumatic motor coupled to a drive shaft of the screen. The system is sized to provide the torque required to drive the screen throughout-the desired speed range, as well as pro... | 12/12/2006 |
| 7144557 | Multitube reactor, vapor phase catalytic oxidation method using the multitube reactor, and start up method applied to the multitube reactor A multitube reactor, wherein tubes having smaller tolerance between a nominal size and actual sizes are used as reaction tubes to stably perform a high yield reaction for a long period, a catalyst is filled into the reaction tubes so that the catalyst layer peak tem... | 12/05/2006 |
| 7144500 | Variable speed waste removal system The invention is directed to a system for removing waste material from a fluid flowing in a channel. This system may incorporate the use of a trap for collecting the waste material while allowing the fluid to pass; a rake for removing the waste material away from th... | 12/05/2006 |
| 7141158 | Debris separating apparatus for use in downspout below an eaves trough A debris separating apparatus for use in downspout below an eaves trough comprises a main housing having a water and debris inlet, a water outlet, and a debris outlet. A debris deflector mounted within the main housing between the water and debris inlet and the wate... | 11/28/2006 |
| 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 |
| 6936164 | Rotary drum rainhead A device for separating debris and other material from rainwater as it flows into a downpipe from a roof gutter is disclosed. The device has a compartment for fitting to the upper end of a downpipe. The compartment has a horizontally pivoted perforated drum which ro... | 08/30/2005 |
| 6926839 | Method and apparatus for removing particulate contaminants from commercial laundry waste water A filtration apparatus includes a filter element disposed at a 45 degree angle defining an upper chamber for solids and a lower chamber for liquid. A trough is disposed at the lower end of the filter element. The floor of the trough funnels toward a central drain an... | 08/09/2005 |
| 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 |
| 6896820 | Debris removal system An automatic screening apparatus for removing debris from a liquid stream includes a drive mechanism mounted to a support frame. A screen connects to the support frame and collects debris while allowing the liquid to flow through. The drive mechanism positions and i... | 05/24/2005 |
| 6869524 | Scraper arm for rake screen A screen system used in fluid channels has a scraper for removing debris from bars in a bar screenfield. The scraper is mounted to a top of a screen system. The scraper is lifted by a rake while simultaneously removing debris from the rake. Once the rake clears the ... | 03/22/2005 |
| 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 |
| 6719912 | Bar screen system with emergency discharge doors A screen system used in fluid channels has emergency discharge doors. The emergency discharge doors are located within the debris plate of the bar screen system and can be opened, as needed, to prevent fluid from overflowing should the grid screen become obstructed.... | 04/13/2004 |
| 6679994 | Screening apparatus A method dealing with an overflow capacity of a fluid screening system is disclosed, the system (20) including a first screen (22) for screening objects of a first predetermined size from a fluid channel (21) the method comprising the step of: providing a... | 01/20/2004 |
| 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 |
| 6666977 | Removable bar for bar screen A screen system used in fluid channels has individually removable bars in a bar screenfield. The removable bars are connected to the screen system through at least two screenfield bar holders. The screenfield bar holders contain a plurality of slots in wh... | 12/23/2003 |
| 6613238 | Fixed media filter screen, screen protector, and CSO screen The present invention is a device and method for clearing debris from fluid channels. In one embodiment, the device has a fixed screening member that is permeable in part wherein debris will collect. A movable scraper then scrapes along the screen and rem... | 09/02/2003 |
| 6579450 | Non-metallic tooth segment and bar rack design The bar screen of the present invention includes a bar rack and a cleaning rake. The bar rack includes a plurality of aligned bars and is adapted to be at least partially positioned within the channeled water. The cleaning rake is movably coupled to the b... | 06/17/2003 |
| 6572763 | Wastewater screening, washing and dewatering system The present invention is a screening/washing/dewatering system which utilizes a solids handling pump to vacuum solids captured from a contaminated fluid stream from the system's screening mechanism and to convey them, in a concentrated form and through a ... | 06/03/2003 |
| 6409915 | Rake cleaning arrangement A rake cleaning arrangement for a trashrack situated in front of the intake opening of a turbine arrangement, wherein the turbine arrangement is arranged in a weir opening delimited at its sides by two pillars and these pillars delimiting the weir opening... | 06/25/2002 |
| 6372134 | Cleaning device for removing oil A cleaning device (1), which is attached to a collecting device comprising a body and wheels (3) in which device a V-shaped brush (2) secured to a belt (7) moves in a groove, whereby the brushes flatten between the trough walls of the cleaning device (1) ... | 04/16/2002 |
| 6309540 | Apparatus for separating solids from a liquid An apparatus for separating solids from a liquid includes a housing with two spaced-apart side walls, a plurality of parallel looped barrier members disposed side-by-side between the side walls for trapping solid matter, a circulating unit, a driving sour... | 10/30/2001 |
| 6264834 | Sewage treatment plant for thickening a solid-liquid suspension Sewage treatment intended for separating solids and liquids under gravity, particularly for sludge from sewage works, comprising a flat and stationary thickening or drainage grating onto which the sludge is continuously conveyed, this sludge being constan... | 07/24/2001 |
| 6245225 | Stepped filtration device for mechanically separating solids from liquids A staged filter apparatus (1) for mechanically separating solids from liquids flowing in channels, gutters or conduits, which has a multiplicity of stage screen bars (7') connected to form a stationary grating (7), and a multiplicity of stage screen bars ... | 06/12/2001 |
| 6177020 | Stepping screen assembly for collecting solids in waste water discharges A stepping screen assembly bottom portion is located in a liquid waste stream containing solids. The assembly contains a grid structure surrounded by an outer frame. The grid structure includes multiple parallel alternate static and dynamic bars horizonta... | 01/23/2001 |
| 6139728 | 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) includes a plurality ... | 10/31/2000 |
| 6129215 | Programmed method of and apparatus for screening debris A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove ... | 10/10/2000 |
| 6126821 | Raked bar screen A raked bar screen for a storm overflow comprises a grid of parallel spaced-apart bars (1) attached at their ends to a framework (2,3,14). A comb assembly (4,5,6) has teeth (5) which engage in the spaces between the grid bars (1). The comb assembly is lon... | 10/03/2000 |
