With Plural Outlets From Filter Casing Patents (Class 210/414)
  • Patent number: 11148959
    Abstract: A process to treat fines tailings generated from mining operations, wherein tailings material is sprayed onto a solid substrate as a thin layer and allowed to dry. The spray may be re-applied on top of the dried tailings film leading to multiple layers of dried tailings solids. The method may yield a solid, dry, and consolidated tailings material.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: October 19, 2021
    Assignee: CEDA Services and Projects LP
    Inventors: Ian D. Gates, Jingyi Wang, Spencer Fried, Yi Su
  • Patent number: 11103811
    Abstract: Screen designs and screens for a mechanical separation device are disclosed for separating solids from liquids in a process stream. A screen may have a plurality of openings, which are conical shaped, having a diameter of about 1.0 mm to about 1.4 mm in size that are formed on a stainless steel sheet.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: August 31, 2021
    Assignee: ICM, Inc.
    Inventor: Charles C. Gallop
  • Patent number: 9932974
    Abstract: A pump system includes a particulate consolidator pump that has a pump outlet. A duct is coupled to the pump outlet. The duct has a wall that is coupled with an oscillator. The oscillator is operable to oscillate the wall at a controlled frequency. The controlled frequency is selected with respect to breaking static bridging of particulate in the duct due, at least in part, to consolidation of the particulate from a downstream check valve.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: April 3, 2018
    Assignee: Gas Technology Institute
    Inventor: Kenneth M. Sprouse
  • Patent number: 9861247
    Abstract: The present patent document provides embodiments of a filter and a system for use with the filter for separating dirt and other contaminates from wash liquids. In a preferred embodiment the filter comprises: a plurality of passages all oriented parallel to each other wherein the passages have a circular top with a first diameter and a circular bottom with a second smaller diameter and a portion in between the top and the bottom that is funnel shaped; a body that couples each of the plurality of passages together; wherein the passages are arranged in concentric circles radiating out from the center of the body.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: January 9, 2018
    Assignee: SMART, INC.
    Inventor: Paul Schneider
  • Patent number: 9827533
    Abstract: An apparatus for reducing the total dissolved solids of a solution includes a unit having at least two chambers; a respective semi-permeable membrane arrangement disposed between each of the at least two chambers; a device for introducing respective solutions into, and withdrawing solutions from, the chambers; and at least one paddle disposed in each of said chambers. The paddles are configured to sweep opposite sides of each of the semi-permeable membrane arrangements. A device provides relative movement between the paddles and the semi-permeable arrangements.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: November 28, 2017
    Inventor: Ashok Kumar Ghosh
  • Patent number: 9480279
    Abstract: A system for beverage preparation, and methods for manufacturing and using same. The system includes a container defining a container cavity having a cavity top and bottom end and a plunger assembly configured to translate within the container cavity between the cavity top and bottom end. The plunger assembly can include a shaft having a shaft top and bottom end, a straining body disposed at the shaft bottom end and having a strainer top and bottom end and a strainer bottom surface, and a scraper assembly rotatably coupled about the strainer bottom end and configured to rotatably scrape the strainer bottom surface.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: November 1, 2016
    Assignee: ERJO DESIGNS, LLC
    Inventors: Jodi M. Fogelin, Eric Fogelin
  • Patent number: 9345994
    Abstract: A method of increasing efficiency of a Y strainer and Y strainer modified in accordance with the method. The Y strainer is of the type that has a filter cartridge receiving inflow through one end and outflow through apertures in a peripheral sidewall. The method involves slowing a velocity of fluids entering the filter cartridge of the Y strainer by having the fluids pass from a first bore of a first diameter into a second bore of a second diameter which is at least 50% larger than the first diameter prior to entering the filter cartridge. The filter cartridge also has the second diameter. This modification has been found to dramatically improve the performance of the Y strainer.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: May 24, 2016
    Inventor: Jay R Morris
  • Patent number: 9169060
    Abstract: A beverage container for a brewing machine comprising a filter cup having a frame including an upper peripheral member and a lower peripheral member and filter material extending thereabout, a cover formed of a flexible material, the cover having a circular recess formed on a lower side of the cover to receive an upper wall of the upper peripheral member, the circular recess having an enlarged portion to receive a guide rib such that the cover is placed on the container in a predetermined location.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: October 27, 2015
    Inventor: Christian Tremblay
  • Patent number: 8951411
    Abstract: A multi-step press apparatus for sludge dewatering and waste water filtration comprising: a tank, an inflatable membrane, a level sensor, and a nozzle assembly.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: February 10, 2015
    Inventor: Eitan Sharir
  • Publication number: 20140272035
    Abstract: An auto-cleaning marination filter for a poultry injector system including an outer housing having a liquid inlet and outlet, a screen that allows passage of liquids and impedes passage of solid particles, and a wiper surrounded by said screen for removing solid particles attached to the screen by reverse flow of the liquid through a gap in the wiper.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: Andrew C. Estes, Jeremy B. Estes
  • Patent number: 8821720
    Abstract: Disclosed herein is a filtering apparatus for treating ballast water. The apparatus is constructed so that a housing cover plate and an exhaust unit are removably coupled to each other at an upper position of a housing. The exhaust unit includes a base flange on a portion thereof coupled to the housing cover plate and the base flange includes a projecting step that projects to be inserted into a core through hole formed in the housing cover plate. A core serving as a discharge passage of foreign substances includes a shaft coupling unit on a portion thereof coupled to the driving shaft, and is coupled at the shaft coupling unit to the driving shaft via a coupling structure. The outer diameters of the coupling structure and the shaft coupling unit are formed to be smaller than the outer diameter of the core.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: September 2, 2014
    Assignee: Panasia Co., Ltd.
    Inventors: Soo-Tae Lee, Tae-Sung Pyo, Su-Kyu Lee
  • Patent number: 8388836
    Abstract: A waste separator apparatus is provided. The apparatus includes a first screen assembly for screening fluids from a waste stream where the first screen assembly defining an enclosure. A second screen assembly is provided for screening fluids from the waste stream and is disposed closely spaced-apart within the enclosure of the first screen assembly. A waste stream pathway is defined between the first screen assembly and the second screen assembly. A first separated fluids stream pathway is defined outwardly of the first screen assembly. A second separated fluids stream pathway is defined inwardly of the second screen assembly. One or more blades extends inwardly from the first screen assembly or outwardly from the second screen assembly for advancing the waste stream through the waste stream pathway. A related system is also provided.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: March 5, 2013
    Assignee: Emerald Waste Solutions, LLC
    Inventors: Lewis Morris Fetterman, III, Durwood Nelson Renfrow, James Eulen Sinclair, Jr., Angela Denise Schroeder, Claude Decator Pyatte, Jr.
  • Patent number: 8177073
    Abstract: A quickly cleanable water processor includes a shell, a water pipe, at least one filtering unit and a cleaning unit. The shell includes a space defined therein, a water inlet, a water outlet and an air inlet. The water inlet and outlet and the air inlet and outlet are in communication with the space. The water pipe is disposed in the shell and made with slots in communication with the water inlet. The filtering unit is detachably provided around the water pipe. The filtering unit includes alternately arranged membrane bags and water-guiding discs. The cleaning unit includes an air pump and an air pipe extended into the shell from the air pump through the air inlet. The air pipe includes apertures through which air reaches the membrane bags from the air pipe.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: May 15, 2012
    Assignee: New Century Membrane Technology Co., Ltd.
    Inventor: Chi-Chang Kuo
  • Patent number: 8048296
    Abstract: An apparatus for filtering liquid that includes a filter having an external surface; a rotatable shaft extending through the filter; and a movable member coupled to the rotatable shaft. The movable member is configured to impart a suction force at various locations across the external surface of the filter. The movable member has a trailing portion that extends further than the leading portion in the direction toward the filter.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: November 1, 2011
    Inventor: Jay Stevens
  • Publication number: 20110253605
    Abstract: Systems and methods for filtering algae from fluid including a piston and pressurized air system to scrape and clean algae from the filter.
    Type: Application
    Filed: May 31, 2011
    Publication date: October 20, 2011
    Applicant: Arizona Board of Regents for and on Behalf of Arizona State University
    Inventors: Qiang HU, Milton SOMMERFELD, Xuezhi ZHANG, Aniket KALE
  • Patent number: 8025156
    Abstract: A vertical cylindrical dewatering apparatus for dewatering fibrous slurries, slurry of manure and water, or other similar slurries. The apparatus includes a housing that includes a defined chamber having an enclosed top end with a slurry injector into the chamber, a centrally disposed first filtering element that includes first and second flightings, and a second vertical cylindrical filtering element including a support grid. The first and second filtering elements define the chamber. The slurry in-flow port at the top of the apparatus directs the slurry spiraling down between the flightings. The particles start building up at the bottom of the chamber as the water is filtered out from the housing through filtrate drains. Compressed air supplied through a rotating seal down through the centrally disposed filtering element moves through the filter, and through the particles forcing the water from between the particles out through the outer filter element.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: September 27, 2011
    Inventor: Floyd G. Tapp
  • Patent number: 8011515
    Abstract: A device including a hollow cylindrical body, first and second stationary coaxial annular screening screens disposed within the body, and a rotor within the body and positioned between the screens to conduct the slurry through the first screen and then through the second screen, the rotor being driven in rotation. The pulp slurry passes through a central entry pipe, radially outward and then upward along the inside of the rotor, further inward through a coarse screen cylinder, and then around the end of the rotor to pass between the outer surface of the rotor and the inner surface of a fine screen cylinder. The pulp slurry then finally passes outward through the fine screen cylinder. Coarse rejects, such as knots or other coarse material, are collected at the end of the coarse screening chamber and led away for further processing. Fine rejects are similarly collected at the end of the fine screening chamber, also to be led away separately for further processing.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: September 6, 2011
    Assignee: Ovivo Luxembourg S.á.r.l.
    Inventor: Brian J Gallagher
  • Patent number: 7993519
    Abstract: A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element. The disclosed filter element is a continuous resilient, cylindrical, helical filter coil including a regular sinusoidal shape defining loop-shaped filter pores between adjacent coils.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 9, 2011
    Inventor: E. Bayne Carew
  • Patent number: 7883624
    Abstract: A self-cleaning filter for a washing apparatus. Water entering a filter assembly travels along a spiral pathway that facilitates the separation of heavy solid debris from the water. A filter element prevents both light and heavy solid debris from entering a conduit leading to spray nozzles, thereby preventing clogging of the nozzles. In a filter cleaning operation, solid debris is removed from the filter assembly.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: February 8, 2011
    Assignee: STERIS Inc.
    Inventors: Maxime Robert, Nathalie Thibault
  • Patent number: 7820013
    Abstract: A screen cylinder comprising screen slots (3) and accept channels (8) for directing the portion penetrated the screen slots (3) to an accept side (9) of the screen cylinder (1) of the fiber pulp suspension fed into a feed side (10) of the screen cylinder (1). At least one feed side surface (4) is provided between the screen slots (3) and the accept channels (8) comprise at least one first surface (5) of the accept channel (8) and at least one second surface (6). At least a third of the total length of the accept channel (8) is arranged in a direction opposite to a feed flow direction (A) of the fiber pulp suspension in relation to a normal (19) of a tangent (18) of the screen cylinder (1), which is arranged to pass through the screen slot (3).
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: October 26, 2010
    Assignee: Metso Paper, Inc.
    Inventor: Kati Lindroos
  • Patent number: 7727386
    Abstract: A voraxial separation system having an auxiliary filter is disclosed for separating flowable composite media into components. The voraxial separation system receives a flowing stream of composite media and utilizes centrifugal force to separate the stream into component radial layers according to specific gravity whereafter one or more radial layers may be extracted from the stream. An auxiliary filtration apparatus includes a conduit having a flowable media input, a generally cylindrical filter disposed within the conduit, and filtered and unfiltered media outlets. An elongate spray tube is disposed within the tubular filter substantially adjacent to the radially inner surface of the filter. The spray tube is fluidly connected to a pressurized fluid source and defines a plurality of spray outlets disposed in a direction radially outward so as to direct pressurized fluid onto the cylindrical filter from the filter interior thereof to clean the filter of accumulated substances.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 1, 2010
    Inventors: Alberto DiBella, Michael Anthony
  • Patent number: 7674377
    Abstract: A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element. The disclosed filter element is a continuous resilient, cylindrical, helical filter coil including a regular sinusoidal shape defining loop-shaped filter pores between adjacent coils.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: March 9, 2010
    Inventor: E. Bayne Carew
  • Patent number: 7597201
    Abstract: A device for cleaning a suspension, preferably a fibrous suspension for paper production. The device includes a screen basket, on the exterior surface of which the suspension to be cleaned is supplied and from the interior surface of which the screened accepted stock is released. A housing surrounds the screen basket. The housing includes an inflow for the suspension to be cleaned, an accepted-stock outlet for the cleaned suspension and a reject outlet for impurities. A scraping device rotates on the outside of the screen basket about the screen basket axis and has scraper blades (foils) which scrape along the exterior surface of the screen basket. The scraping device comprises a drum with a cylinder surrounding the screen basket. The cylinder carries a plurality of foils on its inside facing the screen basket.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: October 6, 2009
    Assignee: Voith Patent GmbH
    Inventors: Werner Brettschneider, Rainer Meisenberg
  • Patent number: 7390419
    Abstract: A waste water recovery system to filter and recirculate waste water to a wash system including a fluid recovery line, a fluid supply line and a fluid backwash line comprising a filter assembly including a water filtering section to receive waste water from the wash system and to recirculate filtered water to the wash system and a filter backwash section to selectively clean the water filtering section when a system condition exists, and a fluid control including a plurality of valve assemblies operatively coupled between the wash system, the water filtering section and the filter backwash section to selectively control the circulation of water through the water filtering section to recirculate the recovery water to the wash system and to periodically clean the water filtering section.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: June 24, 2008
    Assignee: Con-Serv Manufacturing
    Inventor: James C. Keller
  • Patent number: 7344033
    Abstract: To provide a solid-liquid separator in which a treatment object such as sludge can be transported without clogging, liquid can be efficiently separated from the treatment object, and a maintenance operation can be easily conducted. Movable plates 12 and fixed plates 13 are disposed alternately, two screws 21, 22 are disposed in recess sections 14, 15 formed in the movable plates 12 and fixed plates 13, parts of blade sections 25, 26 of the two screws 21, 22 overlap each other, the two screws 21, 22 are rotary driven, and the liquid is discharged from the gap between the movable plates 12 and fixed plates 13, while the treatment object is being transported. When the movable plates 12 are replaced, the two screws 21, 22 are lifted up and then the movable plates 12 are pulled up and replaced.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: March 18, 2008
    Assignee: Amukon Kabushiki Kaisha
    Inventor: Masayoshi Sasaki
  • Patent number: 7163106
    Abstract: A strainer for fibrous suspensions, having a container, a filtering basket inside the container and a rotor inside the filtering basket coupled to motorization means suited to set it rotating. In the container there are a drain chamber of the rejected suspension, a delivery chamber of the filtered suspension, and a collector body arranged in the upper part of the container. The collector body has a lower collector and an upper collector, both with radial longitudinal profile in the shape of a truncated cone and connected to each other in correspondence with the long bases. The lower collector has its short base facing the filtering basket and the upper collector has its short base facing upwards.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: January 16, 2007
    Assignee: Comer S.p.A.
    Inventor: Giancarlo Dal Maso
  • Patent number: 7143690
    Abstract: The invention relates to a screw compressor for compressing matter that passes through the screw compressor. The screw compressor comprises a screw having an outer thread with a pitch that decreases in the longitudinal direction of the screw, and a casing that encases the screw. The casing has an inner side that faces the thread of the screw so that matter may be passed ahead through the screw compressor between the screw and the inner side of the casing in a direction from an inlet end of the screw compressor, where the pitch of the screw thread is greater, to an outlet end of the screw compressor, where the pitch of the screw thread is smaller. Appliances are arranged on the inner side of the casing to prevent matter that passes through the screw compressor from rotating along with the screw. Inside the screw, a conduit is arranged for introduction of liquid. The invention also relates to a method for compressing and dewatering.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: December 5, 2006
    Assignee: Mastec Stålvall Aktiebolag
    Inventors: Lennart Börjesson, Roland Eriksson
  • Patent number: 7097740
    Abstract: The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cylinder, and a second, less coarse pulp mixture is supplied to the second screen cylinder. The pulp mixtures are screened by means of a screen surface of the screen cylinders into accept that passes apertures provided in the screen surface and reject that does not pass the apertures. The accept from the second cylinder is conveyed by means of a guide tube provided between the cylinders towards the inlet end of the first cylinder and it is finally mixed with the first pulp mixture. The accept from the first and the second pulp mixture passes the screen surface of the first screen cylinder.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: August 29, 2006
    Assignee: Metso Paper Inc.
    Inventor: Timo Vuorinen
  • Patent number: 7055699
    Abstract: A self-cleaning mechanical filter comprises a mechanism for simultaneously cleaning the internal surface and the external surface of a filter element. The filter is provided with structure for performing suction scanning of solid materials accumulated on the internal surface of the filter element, and structure which can be operated in synchronization with the suction scanning structure for backwashing the external surface of the filter element during a self-cleaning process.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: June 6, 2006
    Assignee: Amiad Japan Inc.
    Inventor: Mitsuo Takatsuka
  • Patent number: 7001505
    Abstract: A slurry monitoring system is provided. A filter encompasses a filter chamber containing a purge piston. During a monitor operation, the purge piston is retracted, and slurry enters the filter chamber through the filter, then passes into an outlet pipe, where a characteristic of the slurry is monitored by a monitoring device. During a purge operation, a flush valve is opened to allow water to pass into the filter chamber through an inlet pipe. The purge piston is extended to force filtered slurry from the filter chamber. The water dilutes filtered slurry remaining in the filter chamber. The flush valve is then closed and the purge piston retracted. This forces diluted slurry to pass out of the filter. This purges the filter. Diluted slurry also passes into the outlet pipe, which purges the outlet pipe and monitoring device.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: February 21, 2006
    Assignee: Pinnacle West Capital Corporation
    Inventor: Lyle L. Hersh
  • Patent number: 7001506
    Abstract: The present invention provides a system and method for providing a self-cleaning water circulation system which may be utilized for a fish pond, fountain, or the like. Means for automatically cleaning the pump intake to avoid pump failure due to leaves and debris is provided. The circulation system also comprises a self-cleaning filter for cleaning the circulated water whereby maintenance requirements are substantially reduced.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: February 21, 2006
    Inventor: Ronald L. Anderson
  • Patent number: 6911147
    Abstract: A module for ultrafiltration or microfiltration of water includes hollow fibers, of the type of filtration from outside inwards of the fibers, the water to be treated being introduced at the top of the module and the treated water being collected at the bottom of the module. The fibers are arranged inside a housing in multiple U-shaped bundles, the module being vertically arranged in use with the U-shape in the top part of the module. At the bottom of the module, each bundle is arranged in a sheath and individually potted. The sheaths are then urged to be housed in a distribution plate, and all the sheaths are interconnected by pouring (in reverse vertical position relative to that of the filtering mode) a potting resin.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: June 28, 2005
    Assignee: Polymem
    Inventors: Jean-Michel Espenan, Franc Saux
  • Patent number: 6890434
    Abstract: A backflushing filter for filtering oil includes filter candles 22 which are open at both ends 24, 34 and disposed around a rotary shaft 1 in a filter housing. A cleaning device is moved in conjunction with the rotary shaft and includes upper and lower flushing cocks communicating with an outflow valve via the shaft for cleaning the candles during a backflushing operation. The upper flushing cock 27 is offset by an angle in the direction of rotation in relation to the lower flushing cock 37. A lower closure element 38 moves in conjunction with the upper flushing cock at the opposite end of a filter candle(s) selected for backflushing. Likewise, an upper closure element is associated with the lower flushing cock. The candles can be reverse-flushed in opposite directions and at different times by the flushing cocks and closure elements. The flushing cocks and closure elements are moved inside annular deflection hoods 60, 70.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: May 10, 2005
    Assignee: Boll & Kirch Filterbau GmbH
    Inventors: Willi Rott, Wilhelm Vieten, Heinz Heinrich Leonhard Sindorf, Rüdiger Lennartz, Sivagnanam Kandiah
  • Patent number: 6783667
    Abstract: A screen unit for removing solid particles from a viscous mass, for example molten plastic. The screen unit includes a housing provided with a supply channel and a discharge channel for the viscous mass, a screen element in the housing between the supply channel and discharge channel, a backflush channel for discharging during backflushing solid particles screened by the screen element and connected to an outflow channel by a shutoff valve, and a pressure element which can be operated to flush back the viscous mass through the screen element at a pressure higher than the pressure in the supply channel. The shutter element is placed along the screen element, and the shutter element is caused to move with respect to the screen element such that during the screening phase the screen element is gradually more exposed for screening and during the backflushing phase the screen element is gradually less exposed to the backflushing action.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: August 31, 2004
    Assignee: Goya B.V.
    Inventor: Jan J. M. Van Den Goorbergh
  • Patent number: 6752920
    Abstract: A self cleaning filter includes a body (15), inlet (1), outlet (14), flush inlet (12) and waste outlet (2). Elements (7) provide filtration while compressed but are cleaned decompressed. Feed from inlet port (3), impacts and swirls from an impeller (5) on moveable plunger (6) for preliminary centrifugal separation. During filtration plunger (6) is positioned to open the inlet port (3), the filtrate port (11) and compress filtration elements (7). The swirling feed permeates the filtration elements (7) and passes filtrate port (11), filtrate valve (21), filtrate plenum (16), and exits the filtrate outlet (14). Plunger (6) is moved and cleaning is provided by supplication of pressurized cleaning media to the back flush receiver plenum (13) via the back flush media inlet (12). This pressure motivates plunger(6) to close inlet port (3), filtrate port (14) and decompress filtration elements (7).
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: June 22, 2004
    Inventors: James Jeffrey Harris, James William Harris
  • Publication number: 20040112806
    Abstract: The present invention provides a system and method for providing a self-cleaning water circulation system which may be utilized for a fish pond, fountain, or the like. Means for automatically cleaning the pump intake to avoid pump failure due to leaves and debris is provided. The circulation system also comprises a self-cleaning filter for cleaning the circulated water whereby maintenance requirements are substantially reduced.
    Type: Application
    Filed: August 14, 2003
    Publication date: June 17, 2004
    Inventor: Ronald L. Anderson
  • Patent number: 6749069
    Abstract: A description is given of equipment for filtering liquids, comprising three sections superimposed coaxially and placed above a container with filter walls for collecting the filtered particles. From the top to the bottom, the first section communicates directly with the second, while the second communicates with the third sector, and the latter communicates with the container via two valves. A pump introduces the liquid to be filtered into the first section, inside a filter layer, and another pump projects a quantity of the previously filtered liquid against the filter layer from the inside of the first section. By cyclically operating the valves it is possible to continuously filter the liquid, which flows out in the filtered state from ducts which branch from the first section, even while the particles deposited in the third section are discharged into a container with filter walls which is immersed in a vessel containing the liquid to be filtered.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: June 15, 2004
    Inventor: Luciano Maggetti
  • Patent number: 6726022
    Abstract: Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject portion of the fiber suspension, and an accept chamber for collecting the accept portion of the fiber suspension passing through the screen and supplying it to the accept outlet, each of the pulsation wings including an outside face and an inside face, a leading edge, a trailing edge, and upper and lower ends so that a predetermined pressure difference is created between the outside and inside faces of the pulsation wings in the direction of the lower edge thereof.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: April 27, 2004
    Assignee: Valmet Fibertech AB
    Inventor: Tomas Wikström
  • Publication number: 20040050770
    Abstract: The invention relates to a device (1) for separating a substance into two phases, which device (1) comprises a screw conveyor (5) including a shaft and at least one screw (5) which is mounted on said shaft, which screw conveyor extends between an intake opening (9) for the substance and an outlet opening (16) for one of said two phases, as well as a cylindrical screen (10) provided with screen openings (11), within the screw conveyor (5) is rotatably disposed for conveying the substance in a direction of transport from said intake opening (9) to said outlet opening (16) via flow surfaces lying in a radial plane between said shaft, two successive screw threads in said radial plane and the screen, and for discharging the other one of said two phases via said screen openings (11), wherein the screw length of the screw conveyor (5) is determined by the length of the screen within which the screw extends, and wherein the flow surface area increases along the entire screw lenth, seen in the direction of transport.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 18, 2004
    Inventor: Matheus Everardus Antonis
  • Patent number: 6634508
    Abstract: In a screw press, an outer tube (5), over which a screen (4) is tensioned, is divided into a freely rotatable condensing zone at the front half thereof, and a filtering and dewatering zone at the rear half thereof, a freely rotatable screw shaft (7) is provided within the thus-divided outer tube (5a, 5b), filtered fluid is separated from sludge supplied to the starting end of the condensing zone by the screen (4) of the outer tube (5a), and a cake is removed at a discharge port (29) at the rear end of the outer tube (5b) of the filtering and dewatering zone. A sludge supply path (28) is provided in the screw shaft (7), a supply hole (28a) of this supply path (28) is formed at the starting end of the outer tube (5a) of the condensing zone, and a scraper (33) extends on the outer periphery of a screw vane (6) from the starting end to the ending end.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: October 21, 2003
    Assignee: Ishigaki Company Limited
    Inventor: Eiichi Ishigaki
  • Publication number: 20030155314
    Abstract: A self-cleaning, back-washable filter apparatus and method for use with a pumping apparatus which is lowered into a well casing. The filter apparatus includes a filter basket having a manifold with several tubes extending therefrom. A filter sock encases at least a portion of the filter basket to block sand or other solid particles from entry into the pump intake. Pressurized gas or fluid is directed to the manifold and then through perforations or jets distributed along the length of the tubes. Bursts of the pressurized gas are directed from the perforations or jets to the interior of the filter apparatus and then sprayed from the perforations or jets in an outwardly direction against interior surfaces of the filter sock. Air or fluid bursts from the perforations impinge upon the interior surfaces of the filter sock and dislodge or expel entrapped particulate material.
    Type: Application
    Filed: October 18, 2002
    Publication date: August 21, 2003
    Applicant: Gordon Construction, Inc.
    Inventor: Robert R. Gordon
  • Patent number: 6575307
    Abstract: A self-cleaning water filter assembly including a body having inlet and outlet portions and a filter housing portion defining a cavity disposed therebetween so that water entering the inlet must flow through an inner surface to an outer surface of a filter then to the outlet. A piston disposed concentrically within the filter is biased in an upward resting position by a spring in the absence of water pressure. A scraper extends radially from a piston sidewall and into contact with the inner surface of the filter. Apertures extend through the sidewall and into a central bore extending through a bottom end of the piston. In the presence of water pressure, the piston is forced downwardly into the cavity, and the scraper and apertures cooperatively dislodge and flush filtered particulate matter from the housing. As water pressure is reduced, the piston is biased into its upward resting position, dislodging and flushing filtered particulate matter again.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: June 10, 2003
    Assignee: Rain Bird Corporation
    Inventor: George H. Lockwood
  • Patent number: 6536602
    Abstract: A food waste disposal system having a separator for separating food waste solids from liquids. The separator includes a housing having a screw conveyor surrounded by a screen. The solids are introduced into the screen and conveyed by the screw conveyor toward the opposite end. The solids are compacted by the conveyor against a spring loaded member that adjustably blocks passage of the waste to an exit chute.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: March 25, 2003
    Inventors: Walter August Ruescher, Christoph Rudolf Kopetzky
  • Publication number: 20030042194
    Abstract: The filter has a framework with an inlet end, a solids outlet end and an outlet for a separated product between the ends. A fabric filter extends in the framework from end to end and is supported by movable rings, resilient members and dampers enabling axial extension and contraction of the filter. The resilient members, rings and dampers form a unit removable from the framework. A propeller turbine extends through the filter and is supported at opposite ends, and a drive is coupled with the turbine at the one end of the framework. A quick assembly/disassembly mechanism with a rail extends along the framework and is engageable with its cap for removing same and affording access to the unit enabling withdrawal of the unit from said framework and reinsertion of a filter unit composed of a filter and respective movable rings, resilient members and dampers.
    Type: Application
    Filed: July 24, 2002
    Publication date: March 6, 2003
    Inventor: Attilio Turchetti
  • Patent number: 6499603
    Abstract: A screen for cleaning a pulp suspension including a cylindrical screen basket and a double-conical accept chamber which widens in the flow direction of the pulp suspension.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: December 31, 2002
    Assignee: Andritz AG
    Inventors: Helmuth Gabl, Axel Pichler, Alexander Gscheider
  • Publication number: 20020139723
    Abstract: Pressure screen to remove impurities from a paper fiber suspension that contains impurities. Pressure screen includes a housing having at least one inflow fitting, at least one accept outflow fitting and at least one reject outflow, and at least first and second cylindrical wires located within housing. The at least first and second wires are arranged to be consecutively flowed through by paper fiber suspension, which is introduced into housing through inflow fitting. A first accept, including a portion of paper fiber suspension that passes through first wire, flows toward second wire, and a second accept, including a portion of paper fiber suspension that passes through second wire, flows out of housing through accept outflow. The at least first and second wires are arranged within housing so that paper fiber suspension is fed radially through the at least first and second wires from an inside to an outside.
    Type: Application
    Filed: March 14, 2002
    Publication date: October 3, 2002
    Applicant: VOITH PAPER PATENT GmbH
    Inventors: Michael Danger, Reimund Rienecker, Samuel Schabel
  • Patent number: 6443312
    Abstract: The self-cleaning filter is used for filtering incoming dirty liquid and distinctly recuperating clean liquid and waste liquid.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 3, 2002
    Assignee: Tech-O-Filtre Inc.
    Inventor: Jean-Pierre Racine
  • Patent number: 6409023
    Abstract: Process and device for fractioning a suspension containing paper fibers, in which the suspension is separated into at least two fractions by a wire with a scraper. The process includes moving the scraper in a substantially parallel relation to the wire so that the wire is kept clear, and a parallel current is created in the suspension with respect to an inlet side of the wire by a rough surface of the scraper, so that the suspension is dragged along the inlet side of the wire with the scraper with minimal slippage of the suspension. The device includes at least one wire having an inlet side with openings; and a scraper having a closed rough surface provided adjacent the at least one wire; wherein the scraper is movable substantially parallel to the inlet side of the at least one wire, whereby clogging of the openings of said wire is substantially prevented.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: June 25, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Samuel Schabel
  • Patent number: 6360896
    Abstract: The invention concerns an apparatus for cleaning liquid fluids, in particular for the cooling water running to a heat exchanger, having a portion of pipe of circular cross section as a housing, a screening body and a suction device, which can be moved about an axis, on the inflow side for regional suction removal and consequently for cleaning the screening body.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: March 26, 2002
    Assignee: Taprogge GmbH, a German limited liability company
    Inventor: Hans Werner Schildmann
  • Patent number: 6287474
    Abstract: A deep bed liquid treatment apparatus and process in which the liquid and a granular media is periodically agitated to create a liquid-media slurry, and outflow of the liquid and entrained contaminants is induced through a separator having an inner diameter screen with openings sufficiently small to prevent the escape of media granules. A rotor is rotated within the separator to create turbulent flow at the screen to dislodge the granules drawn onto the screen openings.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: September 11, 2001
    Assignee: Filtra-Systems Company
    Inventor: Irving A. Dean