Liquid Pulsator Patents (Class 210/412)
  • Patent number: 10145136
    Abstract: A filter apparatus is disclosed herein that includes a filter, such as a cartridge, positioned within a housing. The housing includes a lower-section housing and a cover assembly removably attached to the lower-section housing. The filter apparatus has multiple ports and valves, such as a valve associated with the cover assembly, so as to allow a user to easily switch between various operations on a pool filter, such as between a backwash mode and a filtration mode. The filter apparatus also employs a cage positioned around the cartridge, thereby between the housing and the filter. The cage provides additional support to the cartridge so as to reduce wear and tear of the cartridge. The cover is rotatable about the lower-section housing so as to allow a user to position ports on the cover in any direction.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: December 4, 2018
    Assignee: ASIA CONNECTION LLC
    Inventors: Mitch Saccoccio, Jonathan Bonelli, Reza Afshar
  • Patent number: 9861083
    Abstract: Water filters which comprise a multitude of discrete filter media elements in a chamber require periodic cleaning. However, the elements tend to become adhered to one another and to the interior surface of the chamber. The invention provides a water filter for use with ponds, comprising a filter chamber for containing filter media, and a first movable cutting member provided substantially immediately adjacent the interior wall of the chamber for movement across the surface of the interior surface of the wall to break the adherence of filter media to the interior wall.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: January 9, 2018
    Assignee: INTERPET LTD.
    Inventor: Andrew Paxton
  • Patent number: 9314718
    Abstract: A backwash arrangement for cleaning a cylindrical filter screen includes a cylindrical filter screen within which extends an axial central conduit. A number of radial branch conduits extend outwards from the central conduit towards the cylindrical filter screen, each provided with a spring-loaded nozzle arrangement. The spring-loaded nozzle arrangement is biased into contact with the cylindrical filter screen, and includes a nozzle opening for passing across the cylindrical filter screen, and a pair of wheels deployed on opposing sides of the nozzle opening for rolling engagement with the cylindrical filter screen.
    Type: Grant
    Filed: November 10, 2013
    Date of Patent: April 19, 2016
    Assignee: YAMIT FILTRATION & WATER TREATMENT LTD
    Inventors: Arie Mauda, Oded Elish, Rey Zeeman
  • Publication number: 20140326647
    Abstract: A device for filtering ballast water which performs filtering by installing a filter element having a conical shape in a concentric circle direction inside the device for filtering ballast water that accommodates a filter portion, and introducing ballast water from a lower end of the device for filtering and passing same through the filter element inside the device for filtering, and for discharging backwash water containing foreign substances that are inside a filter by ways of differential pressure, which is created by a driving portion communicating with a filter element by rotating an aspiration portion that is located on the lower end of the device for filtering. In particular, the present invention relates to a candle-type device for filtering ballast water, wherein the driving portion is positioned on a lower portion of the housing so that more filter elements can be accommodated inside the housing.
    Type: Application
    Filed: October 20, 2011
    Publication date: November 6, 2014
    Applicant: PANASIA CO., LTD.
    Inventors: Soo-Tae Lee, Tae-Sung Pyo, Su-Kyu Lee
  • Patent number: 8574431
    Abstract: A wastewater filter assembly comprising a filter having an influent side and an effluent side, a backwash system adapted to control flow of backwash fluid from the effluent side to the influent side, and an agitation system adapted to control the flow of an agitating fluid (e.g., air) from the influent side to the effluent side. In one embodiment, the agitation system includes an agitating tank that stores the agitating fluid, and a series of valves to control the flow of backwash fluid and agitating fluid. In another embodiment, the assembly further includes a control system that controls the backwash system and the agitation system. Preferably, the control system is programmed to pulse the agitation system during operation of the backwash system.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: November 5, 2013
    Assignee: Municipal Filtration Company, LLC
    Inventor: Kurt M. Lindsley
  • Publication number: 20130193059
    Abstract: An apparatus and method for reversing the flow in a reverse osmosis system is described utilizing a single unitary valve. The improved system and method provides a means to reduce operating costs, maintenance and down time associated with a reverse osmosis system by providing a reliable and robust means to reverse the flow of fluid thereby flushing filter membranes.
    Type: Application
    Filed: January 31, 2012
    Publication date: August 1, 2013
    Inventor: Scott Shumway
  • Patent number: 8361313
    Abstract: Plant for treating the leftover liquids of mechanical processing, comprising a filtering partition (9) for filtration of the fluid and means for cleaning the partition by washing of the layer of mud deposited hereon, comprises vibratory means suitable for causing a generally fast and continuous vibratory state at least in the active portion of the partition. The plant comprises at least one chamber (6) that is divided into two parts by the filtering partition (9), one part being intended for the exit of the filtered fluid, means suitable for causing a generally fast and continuous vibratory state at least in the active portion of the partition are associated with said chamber. Method for treating the leftover fluids of mechanical processing, comprising filtration of the fluid through a filtering partition and periodic cleaning of the partition through washing of the layer of mud deposited here; it foresees that at least the surface of the partition on which the mud deposits is subjected to vibratory motion.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: January 29, 2013
    Assignee: P.M.P.O. S.R.L.
    Inventors: Fabio Pancaldi, Vanni Gallocchio
  • Patent number: 8287726
    Abstract: A system for removing sediment from water is disclosed. The exemplary embodiments described herein disclose a system comprising a filter chamber, having a deck positioned inside to divide it into an upper chamber and a lower chamber. The deck may have a plurality of holes to hold filtration elements and also may have a ridge or a skirt or both. An inlet line may be tangentially connected to the filter chamber and introduce influent liquid into the filter chamber below the deck and outside of the skirt.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: October 16, 2012
    Assignee: Monteco Ltd
    Inventors: Gregory Williams, Roland Dubois, Scott Perry, Joel Garbon, Bob Gallucci
  • 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: 8153012
    Abstract: The invention relates to a device for filtering a fluid, in particular a liquefied plastic, with a housing with backflush channel and screen carrier and filter element whereby, in order to accelerate and improve the backflush effect, one or more displacement cylinders are provided that guide material removed from the production at adjustable high pressure and speed to the screen to be cleaned from the clean screen side to the dirty screen side, whereby an additional pressure generator ensures constant process pressure.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: April 10, 2012
    Assignee: Kreyenborg Verwaltungen und Beteiligungen GmbH & Co. KG
    Inventors: Stefan Woestmann, Dirk Bussmann
  • Patent number: 8069989
    Abstract: A self-cleaning water filter system for removing particulate matter from water by producing scouring effect which pulls debris or particles off from a filter element when a fluid flow is produced across the filter element. The self-cleaning water filter system has a filter housing having an upper portion, a lower portion, and an internal cavity. A water inlet tube, an exit tube and a water supply line are adapted to be connected to the filter housing. The filter element is positioned within the filter housing and can have a cylindrical or rectangular configuration. A pressure vessel is in fluid communication with the internal cavity of the filter housing. A pressurizable flexible chamber adapted to expand and contract due to the pressure in the filter housing is positioned inside the pressure vessel. At least one perforated flow tube is positioned in the filter housing adjacent to the filter element and in fluid communication with the pressure vessel.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: December 6, 2011
    Inventor: Robert Gordon
  • Patent number: 8070963
    Abstract: A method for purifying fluids and a sedimentation tank, the sedimentation tank includes: a perforated plate spaced from an upper and of the sedimentation tank dividing the sedimentation tank into an upper chamber and a lower chamber; an inlet adapted to inlet fluid into the tank; a first outlet, positioned above the perforated plate for outletting a clarified fraction of the fluid; a second outlet positioned at a bottom of the tank, for outletting a concentrated sludge fraction of the fluid; a pump; and a washing mechanism, positioned at least partially above the perforated plate; wherein the pump is adapted to provide a washing fluid to the washing mechanism when a level of fluid in the sedimentation tank is below a predefined level; and wherein the washing mechanism washes an upper surface of the perforated plate by the washing fluid.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: December 6, 2011
    Assignee: Odis Irrigation Equipment Ltd.
    Inventor: Vladimir Bomze
  • Publication number: 20110132833
    Abstract: The disclosed self-cleaning filtration system and self-cleaning filter solves various problems by replacing a standard filter cartridge with an adapter screwed in place of the cartridge, a filter of limited size with a motor for rotating an inlet cover plate and an outlet cover plate over a body with a plurality of longitudinal channels inside of a circumferential filtration media where the different parts of the media are used alternately in forward and backward flow. In another embodiment, instead of entry and drain openings, the oil is placed directly in contact with each longitudinal channel with the exception of the channel in fluidic communication with the drain opening. The self-filtration system includes a self-cleaning filter used in tandem with an adapter, a decanter, and a series of hoses.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 9, 2011
    Inventor: Remy Mangano
  • Patent number: 7931803
    Abstract: A fluid filter (1) comprises a housing (3) provided with a fluid inlet (11) and a fluid outlet (19), filter means (45) being mounted in the house (3) between the fluid inlet (11) and the fluid outlet (19) to filter fluid flowing through the housing (3). Actuation means (43) is provided to move the filter means (45), in use, within the housing (3) to dislodge particles of filtered material from the filter means (45) so as to clean the filter means (45). A filter assembly comprising a plurality of such filters is also provided.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: April 26, 2011
    Inventor: Andrea Elaine Buchanan
  • Publication number: 20110079562
    Abstract: The embodiments disclosed herein are generally directed to the separation of mixtures of liquids and solids, of liquids and liquids, and/or liquids and solute using a separation medium. The separation medium can be a membrane with a small pore size or a fine mesh. In some embodiments the properties of interactions between the liquid and the medium and/or between components of the mixture are of significance.
    Type: Application
    Filed: October 1, 2010
    Publication date: April 7, 2011
    Inventor: James Alexander Stark
  • Publication number: 20100310711
    Abstract: A method and apparatus for microfiltering milk before the milk is allowed to cool is disclosed that removes bacteria and other filtrates from the milk thus producing a microfiltered milk product.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 9, 2010
    Inventor: Lamar Chet KENDELL
  • Publication number: 20090236298
    Abstract: A wastewater filter assembly comprising a filter having an influent side and an effluent side, a backwash system adapted to control flow of backwash fluid from the effluent side to the influent side, and an agitation system adapted to control the flow of an agitating fluid (e.g., air) from the influent side to the effluent side. In one embodiment, the agitation system includes an agitating tank that stores the agitating fluid, and a series of valves to control the flow of backwash fluid and agitating fluid. In another embodiment, the assembly further includes a control system that controls the backwash system and the agitation system. Preferably, the control system is programmed to pulse the agitation system during operation of the backwash system.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 24, 2009
    Applicant: MUNICIPAL FILTRATION COMPANY, LLC
    Inventor: Kurt M. Lindsley
  • Patent number: 7294257
    Abstract: A filter unit for filtering particulates and other foreign matter from a water supply, comprising a filtering chamber. At least a portion of an exterior of the filtering chamber being provided with filtering chamber in use. The mesh being sized to filter particulates and other foreign matter from the water. The filter unit further comprising an outlet through which filtered water exits the filter unit, and a rotatable member located within the filtering chamber, the rotatable member having at least one outlet spaced from an internal face of a mesh. The axis of rotation of the rotatable member being such that the at least one outlet traverses at least a substantial portion of the internal face of a mesh.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: November 13, 2007
    Assignee: Filmlight Limited
    Inventor: Nicholas Jackson
  • Patent number: 7282075
    Abstract: A method for cleaning a filter having Z-media includes providing a filter having Z-media and cleaning the media construction by directing a pulse of compressed gas into the media construction through the downstream flow face. Filter elements useable with such methods include elements made of Z-media. An example system utilizing the method includes a gas turbine air intake system.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: October 16, 2007
    Assignee: Donaldson Company, Inc.
    Inventors: Timothy D. Sporre, Jim C. Rothman, Michael W. Handley, Thomas D. Raether
  • Patent number: 7282147
    Abstract: A filtration system is provided with hollow membrane filter elements operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and ultrasonic energy may be used to clean exterior portions of the hollow membrane filter elements to allow substantially continuous filtration of process fluids. The filtration system may be satisfactorily used with process fluids having a relatively high concentrations of solids, particulate and colloidal matter.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: October 16, 2007
    Assignee: Phase Inc.
    Inventors: Curtis Kirker, Berkeley F. Fuller
  • 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: 6899742
    Abstract: In a cleaning arrangement for a filter element disposed in a gas flow channel and including a plurality of filter pockets, a flow blocking element arranged adjacent the filter element at the downstream side thereof and having openings movable with the flow blocking element into alignment with the various filter pockets for controlling a back-flushing gas flow through the filter element, the blocking element is an elastic thin-walled structure provided with at least one opening of a shape corresponding in cross-section to the filter pocket openings and means are provided for generating in the area downstream of the blocking element a gas pressure for back-flushing the filter element pockets in succession as the blocking element with the at least one opening is moved across the filter element.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: May 31, 2005
    Inventor: Andreas Müller
  • Patent number: 6799687
    Abstract: A backflush filter device for filter elements (22) is incorporated in a filter housing (10)having a filter inlet (18) and an outlet (20) for the liquid to be filtered. The filter elements (22) permit flow in both directions for a filtration, or backflush. One filter element (22) may be performing a filtration and, simultaneously, at least one other filter element (22) may be backflushed to clean its effective filtration surface. To assist the backflushing, a vacuum device (42) is provided. The vacuum device generates a vacuum at the filter element (22) to be backflushed. The efficacy of the ongoing backflush is increased to be able to remove even the toughest contaminants. The cleaning process uses little energy and occurs in a defined manner, such that the backflush volumes may be both specified and minimized.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: October 5, 2004
    Assignee: Hydac Filtertechnik GmbH
    Inventor: Otmar Schön
  • Publication number: 20040020842
    Abstract: A self-cleaning assembly comprising an enclosed casing 1 with a movable piston 31 and filters 32,33 therein. The preferred assembly has a casing 1 with a dirty water inlet 5, a first outlet 6 for clean filtered water and a second outlet 7 for the removal of sludge from the casing. The filter assembly is constructed and arranged to provide, in its normal operating mode, a liquid flow path through the filter 32,33 in a first direction between the dirty water inlet 5 and the clean water outlet 6 and, in a cleaning mode, to provide a liquid flow path in a second direction between the dirty water inlet 5 and the sludge outlet 7. In the cleaning mode, the movable member 31 compresses the filters 32,33 during the liquid flow in the second direction and contaminant is released therefrom for removal from the filter assembly via the second outlet 7. In an alternative embodiment, the sludge outlet 7 is omitted and sludge is removed from the casing via the outlet 6.
    Type: Application
    Filed: April 10, 2003
    Publication date: February 5, 2004
    Applicant: Pet Mate Limited
    Inventors: Steve Martin Brooks, Robert Ivan John Wiedemann, David Goodwin
  • Publication number: 20030178350
    Abstract: A back flushable filter comprising a body (15), a raw feed inlet (1), a filtrate product outlet (14), a back flush media inlet (12) and a back flush waste outlet (2). A a filtration element (7) is used which provides filtration when in a compressed, sealed state and can be back flushed clean when released in a loosened state. During filtration, raw feed water passes through an inlet port (3), impacts upon and exits radially with swirl from a centrifugal impact impeller (5) mounted in conjunction with the upstream side of the filter element sealing plunger (6). The swirling raw feed water passes adjacent to and then into and through the filtration element (7). The filtrate then exits the internal filtrate sector of the filtration element (7) via the filtrate port (11) past the open filtrate valve (21), into the filtrate plenum (16) and is discharged via the filtrate outlet (14).
    Type: Application
    Filed: March 21, 2002
    Publication date: September 25, 2003
    Inventors: James Jeffrey Harris, James William Harris
  • Patent number: 6562246
    Abstract: A filter backflushing system including an accumulator containing a pressurized bladder which propels a supply of backwash fluid contained within the accumulator in a reverse direction through a filter element. While the backwash fluid is pumped within the accumulator, an inert gas inside the bladder is compressed against the inside walls of the accumulator. Upon reaching a pressure of approximately 300-600 psi, the filtered fluid is released from the accumulator and the full energy of the compressed gas is released as well. This release produces a high pressure rapid burst of backwash fluid which effectively removes clogging contaminants from a filter element.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: May 13, 2003
    Assignee: Kadant Inc.
    Inventor: David R. McGowan
  • Patent number: 6558443
    Abstract: In a method and apparatus for cleaning filters in which raw gas with particles suspended therein is conducted from a raw gas space to a clean gas space and through which intermittently a back-flushing gas is conducted from the clean gas space to the raw gas space, a flow dynamic control element is disposed in the clean gas space which blocks the outflow of gas from the clean gas space when a back-flushing gas is admitted to the clean gas space under a pressure, which exceeds the filter operating pressure so as to prevent excessive back-flushing gas losses during back-flushing. The flow dynamic control element is switched between an open and a blocking state by the pressure changes in the clean gas space without including any movable parts.
    Type: Grant
    Filed: September 1, 2001
    Date of Patent: May 6, 2003
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventor: Hans Leibold
  • Patent number: 6558545
    Abstract: The invention encompasses a system for the cross flow filtration of fluid media using membranes. The system has in a first embodiment two shafts, only one of which is hollow, with each shaft running through an axis of its given disc. The disc of each shaft is positioned offset with respect to one another to have a region of overlap therebetween. The region of overlap serves to enhance the efficient operation of the system by reducing the degree of settling of retentate on the disc of the hollow shaft, because of the wiping or cleaning effect achieved upon rotation of each shaft by a drive system. In another embodiment, both shafts are hollow.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: May 6, 2003
    Assignee: AA FlowSystems GmbH & Co. KG
    Inventors: Dieter Bläse, Hans Olapinski, Hans-Peter Feuerpeil
  • Patent number: 6543624
    Abstract: The aim of the invention is to improve the backwashing action of a backwashable filter for liquids comprising the following: a filter body which is located in a housing and which separates an incoming flow chamber from an outgoing flow chamber and a backwashing channel which lies adjacent to the filter body, is situated in the outgoing flow chamber and has a backwashing opening that faces towards the filter body, said backwashing channel also communicating with a source of a cleaning medium and said cleaning medium being subjected to pressure in the backwashing channel, and the filter body and the backwashing channel being moveable in relation to each other. To this end, the filter body has links on a side facing towards the backwashing channel which are set apart from each other in the direction of motion.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: April 8, 2003
    Assignee: Mahle Filtersysteme GmbH
    Inventor: Heinz Geisbauer
  • Publication number: 20030042184
    Abstract: A filter backflushing system including an accumulator containing a pressurized bladder which propels a supply of backwash fluid contained within the accumulator in a reverse direction through a filter element. While the backwash fluid is pumped within the accumulator, an inert gas inside the bladder is compressed against the inside walls of the accumulator. Upon reaching a pressure of approximately 300-600 psi, the filtered fluid is released from the accumulator and the full energy of the compressed gas is released as well. This release produces a high pressure rapid burst of backwash fluid which effectively removes clogging contaminants from a filter element.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 6, 2003
    Inventor: David R. McGowan
  • Patent number: 6475397
    Abstract: A back-flushing method is practiced with a back-flushing filter construction wherein a perforate filter screen providing filter openings also forms an internal chamber for receiving the effluent from a liquid stream. A filter piston is disposed in the internal chamber and operates to divide the chamber into first and second zones on opposite sides of the piston. By selectively reciprocating the piston, the effluent in the chamber is compressed and moved on both sides of the piston. Thus, the effluent back-flushes the filter openings and creates a rolling action in the liquid surrounding the filter screen on the upstream side to dislodge particulate debris accumulated on the filter screen.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 5, 2002
    Assignee: Mepsco, Inc.
    Inventor: Tommy Sanderson
  • Patent number: 6439273
    Abstract: A method and apparatus for cleaning candles in a candle filter using a cleaning fluid that flows inside the candle from the side of the filtrate, whereby said fluid is pressed in an opposite direction to the direction of the filtrate from the inside to the outside, through said candles, by a gaseous medium subjected to an overpressure. Water is or can be used as an appropriate cleaning fluid and air is used as a gaseous medium. The prior art teaches nozzle-shaped contractions that are respectively disposed on the outlet end of the candles or deflectors arranged inside the candle at a distance from said contractions, whereby the in-flowing cleaning fluid is deflected towards all sides in the direction of the inner walls of the candles, are provided for distribution of said cleaning fluid.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: August 27, 2002
    Assignee: KHS Maschinen- und Anlagenbau AG
    Inventors: Roland Krüger, Markus Kolczyk, Rainer Kuhnt, Dietmar Oechsle
  • Patent number: 6419094
    Abstract: An apparatus for cleaning a rotating cylindrical wastewater screen of the type formed of tubular perforate wedgewire.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: July 16, 2002
    Assignee: Lyco Manufacturing, Inc.
    Inventors: David R. Zittel, Daniel D. Maupin, Theodore J. Long, Jr.
  • Patent number: 6325922
    Abstract: A filter device for filtering plastic melts includes a filter wheel having cavities which are covered by screening elements. A pressure sensor is provided in a melt inflow line upstream of the filter wheel. A pressure sensor is also provided in a melt outflow line downstream of the filter wheel. The pressure sensors measure the pressure drop across the filter. The melt inflow and outflow lines are connected to a melt channel in the filter device, respectively. A melt return line is in connection via a pump and a discharge line with a backflushing slot. The discharge line is connected to an accelerator for increasing pressure in surges. A further melt return/discharge line is connected via a 3-way valve and a return line to the melt inflow line or to a disposal line.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: December 4, 2001
    Assignee: Arteva Technologies S.A.R.L.
    Inventors: Rainer Schaller, Eduard Lindner, Ralf Henke, Detlef Gneuss
  • Patent number: 6196395
    Abstract: An external regeneration mechanism including a housing having two chambers and a displaceable member disposed between said two chambers and at least two passages are defined on said housing. The first passage is communicating with the first chamber and the filter outlet and the second passage is communicating with the second chamber and the filter inlet of same filter. A rod having an external handle is coupled to said displaceable member and is adapted to move by an external source of power said displaceable member linearly back and forth in order to dislodge particles and filter aid material from the external surface of the filter element.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: March 6, 2001
    Inventor: Mordeki Drori
  • Patent number: 6126819
    Abstract: In an apparatus for the treatment of liquids including foreign substances, particularly municipal and commercial waste waters, comprising a membrane separating structure having membrane elements, an inlet for receiving the liquid to be separated and passing it past the membrane elements whereby a permeant portion of the liquid permeates through the membranes and a retent portion becomes enriched with the foreign substances, and outlets for discharging the permeant portion and the retent portion, the membrane elements are arranged so as to form together flow channels extending longitudinally through the apparatus and adapted to guide the liquid straight through the flow channels along the membrane elements.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: October 3, 2000
    Assignee: Rochem RO-Wasserbehandlung GmbH
    Inventors: Wilhelm Heine, Robert Rautenbach, Klaus Vossenkaul
  • Patent number: 5958243
    Abstract: A membrane filtration system which uses pump speed controllers to control flow rate and pressure during both the filtration cycle and the backwash cycle. The pump speed controllers operate by changing the frequency of AC current delivered to the pump motors, which changes the flow rate by changing the speed of the pump motor. The speed controllers operate by modulating the pump input power frequency in response to a signal from a flow or pressure signal received from a flow or pressure meter located on a liquid input pipe. This pump speed control method avoids the cyclical dampening patterns observed when trying to adjust pressure and/or flow rates by adjusting regulating valves. The system can also reduce or prevent formation of pressure spikes when switching from a filtration cycle to a backwash cycle, and vice versa. This reduces the likelihood of damage to the membrane from hydraulic pressure pulses.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: September 28, 1999
    Assignee: Zenon Environmental Inc.
    Inventors: Darren P. Lawrence, Theo A. A. Hellenkamp
  • Patent number: 5919376
    Abstract: An improved filtration system comprises a vessel divided into a concentrate chamber and a permeate chamber by a permeable septum. An ultrasonic wave generator is mounted to the vessel and positioned to direct ultrasonic waves through both the permeate contained in the permeate chamber and the permeable septum. A circulator such as a pump or agitator is operably associated with the concentrate chamber to provide a shearing force on the surface of the permeable septum. A vessel inlet port allows concentrate to flow into the concentrate chamber and a permeate outlet port allows permeate to be withdrawn.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: July 6, 1999
    Assignee: CAE Ransohoff Inc.
    Inventor: Lyle Carman
  • Patent number: 5906751
    Abstract: A filtering apparatus is provided wherein the filter can be backwashed by an explosive-like surge of backwashing fluid. The backwashing assembly includes a quick-opening backwash valve which is not actuated by a linearly-acting valve stem disposed on the outlet side of the valve. In a typical embodiment, the inlet valve to the filtering apparatus is a rotating butterfly valve and the backwash valve is physically attached to the inlet valve, such that, when the inlet valve is open, the backwash valve is fully-closed and when the inlet valve is moved towards its fully-closed position, the backwash valve is fully-opened. The invention uses a two-step method of initially applying biasing pressure on the inlet valve/backwash valve combination and to thereafter provide additional pressure to dislodge the backwash valve from the valve seat--whereupon the backwash valve quickly opens and an explosive-like surge of backwashing fluid effectively backwashes the filtering media.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: May 25, 1999
    Inventor: Leland L. Parker
  • Patent number: 5893973
    Abstract: A high efficiency backflush filter apparatus positioned on the downstream side of a filter frame that includes a bellows attached to the top of the filter frame. The backflush filter apparatus includes a collapsible bellows member having a first opening attached to an aperture in a plate member, a second opening attached to the filter frame, and a compression plate positioned above the plate member and having a one-way valve. In the preferred embodiment of the present invention, the plate member is slidably mounted on at least one guide member which is mounted to the filter frame and the plate member is spring biased away from the filter frame so that the bellows is in an expanded configuration. The backflush procedure is achieved by stopping the pump, and moving the compression plate, using air cylinders or some other device, until it is against the plate member and thereby trapping fluid inside the bellows.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: April 13, 1999
    Inventor: Gregory S. Antoun
  • Patent number: 5882528
    Abstract: A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering fluid entering the fluid inlets, the fluid passing through the element and out the fluid outlet. The element has a generally cylindrical configuration with the permeable material forming a plurality of elongated, radially extending pleats. The pleats are supported by spacers having a plurality of blades attached to a web with channels therebetween. The element is used as a septum for supporting a diatomaceous earth precoat. A regeneration piston creates fluid flows within the filter that cause the element to flutter, thereby displacing DE precoat from the septum for regeneration.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: March 16, 1999
    Assignee: H-Tech, Inc.
    Inventor: Donald Robert Davidson
  • Patent number: 5871641
    Abstract: A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), the fluid passing through the element (50) and out the fluid outlet (28). The element has a generally cylindrical configuration with the permeable material forming a plurality of elongated, radially extending pleats (98). The pleats are supported by spacers (81) having a plurality of blades (102) attached to a web (106) with channels (104) therebetween. The element (50) is used as a septum for supporting a diatomaceous earth precoat. A regeneration piston (76) creates fluid flows within the filter that cause the element (50) to flutter, thereby displacing the diatomaceous earth precoat from the septum for regeneration.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: February 16, 1999
    Assignee: H-Tech, Inc.
    Inventor: Donald R. Davidson
  • Patent number: 5846420
    Abstract: The piston arrangement includes one or more pistons, each propelled by a pneumatic actuator. Alternately, an accumulator-type actuator may be used, wherein compressed gas is inputted directly into the backflushing fluid chamber to reverse fluid flow through the filter arrangement.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: December 8, 1998
    Assignee: Thermo Fibertek Inc.
    Inventors: Joseph A. Bolton, Peter T. Carstensen
  • Patent number: 5723051
    Abstract: A gap filter for liquids of gases which has a filter body 13 which encloses a clean space within a filter housing and separates it from a dirt space. The filter body 13 is supported by an element which is constructed as a safety filter 14.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: March 3, 1998
    Assignee: Filterwerk Mann & Hummel GmbH
    Inventors: Bertram Bartelt, Peter Gohle, Wolfgang Schaal
  • Patent number: 5653889
    Abstract: A filter element surface is coated with particulate polyamide which serves as a filter aid to trap polyamide oligomers suspended in water. The particulate polyamide is preferably coated onto a surface of a bag filter so that polyamide oligomers flowing through the coated bag filter surface will adhere to the polyamide particles forming an oligomer cake thereon which encapsulates the polyamide particles. Momentarily equalling the pressure differential across, or reversing flow through, the coated bag filter surface (i.e., back-pulsing) will cause the oligomer cake and polyamide particles encapsulated thereby to break into relatively large-sized solid aggregate particles which may be easily recovered. Since the polyamide particles which are encapsulated by the oligomer cake are chemically compatible with one another, the entire particulate aggregate may be subjected to depolymerization processing so as to recover monomers from which the polyamide is formed (e.g., caprolactam).
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 5, 1997
    Assignee: BASF Corporation
    Inventor: Karl H. Buchanan
  • Patent number: 5609172
    Abstract: An improved washing water filtering apparatus for a dish washing machine capable of preventing nets of a washing water filter from being clogged by wastes, so that it is not necessary to clean the nets of a washing water filter after using the dish washing machine, and preventing water pollution by effectively filtering the washing water of the dish washing machine, which includes a waste gathering box having a drain opening formed at an inner wall thereof and connected to a drainpipe and having an introduction tube disposed at a lower inner wall thereof for receiving washing water and wastes, such as food debris; a driving motor disposed at a lower portion of the waste gathering box; a rotary shaft connected to an upper portion of the driving motor and partially inserted into the interior of the waste gathering box and having an upper impeller disposed at an upper portion thereof; a lower impeller disposed at a lower portion of the waste gathering box and spaced apart from the upper impeller and connected to
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: March 11, 1997
    Assignee: LG Electronics Inc.
    Inventors: Jae W. Chang, Joon W. Kim
  • Patent number: 5591329
    Abstract: A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering fluid entering the fluid inlet, the fluid passing through the element and out the fluid outlet. The element has a generally cylindrical configuration with the permeable material forming a plurality of elongated, radially extending pleats. The pleats are supported by spacers having a plurality of blades attached to a web with channels therebetween. The element is used as a septum for supporting a diatomaceous earth precoat. A regeneration piston creates fluid flows within the filter that cause the element to flutter, thereby displacing DE precoat from the septum for regeneration.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: January 7, 1997
    Assignee: H-Tech, Inc.
    Inventor: Donald R. Davidson
  • Patent number: 5578207
    Abstract: The invention relates to a filter device for extruders and injection-molding machines, the screen elements being formed by a candle filter and, if required, by a plurality of candle filters, which are arranged in the circumferential direction on the screen plunger, extending parallel to the longitudinal axis of the screen plunger, and are flowed through from the outside inward for filtering purposes and from the inside outward for backwashing purposes.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: November 26, 1996
    Assignee: Firma Kreyenborg Verwaltungen und Beteiligungen KG
    Inventor: Jan U. Kreyenborg
  • Patent number: 5547574
    Abstract: An apparatus is disclosed for filtering slurries of minerals or other fine particles. The apparatus includes a filter plate having an interior porous support layer and a microporous metal filtration layer overlying the support layer, the pore sizes in the filtration layer preferably being in the range of from about 0.2 to 3 microns. The side of the filtration layer non-adjacent the support layer constitutes a filter surface for the mineral.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: August 20, 1996
    Assignee: ECC International Inc.
    Inventors: Michael W. Ginn, Gary L. Cobb, Lawrence E. Broxton, Kelly R. McNeely
  • Patent number: RE36297
    Abstract: A method and apparatus for fibrous suspensions in the wood processing industry and more specifically to a so-called drum cylinder, the basic construction of which comprises a vessel, into which suspension being thickened is supplied and a wire-surface cylinder rotating in the vessel. The drum filter is characterized in that the closure member of the drum filter has a channel for leading gas from the filtrate tubes through the compartments of the distribution chamber to the outside of the closing member. The method is characterized in that the operation phase of the filter cylinder is divided into five separate stages. In the first stage, when the cylinder descends on to the vessel, air and the initial filtrate are discharged from the filtrate components and the formation of the pulp web on the wire surface begins. In the second stage, filtrate is discharged with vacuum and the formation of the pulp web continues.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: September 14, 1999
    Assignee: A. Ahlstrom Corporation
    Inventors: Jukka Heino, Raimo Kohonen, Erkki Savolainen