Concentric Filter Elements Patents (Class 210/338)
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Patent number: 8128829Abstract: Cross flow filter device comprising a longitudinal first filter element (1) having a first width (w1) and a longitudinal central axis (8), a longitudinal second filter element (2) having a second width (w2) and being longitudinally installed substantially concentrically inside said first filter element (1), a housing (3) surrounding said first filter element (1), said cross flow filter device having respectively a raw material inlet (4), a concentrate outlet (5), and a first filtrate outlet (6) connected to said first filter element (1). The ratio between the second width (w2) and the first width (w1) is 65%, preferably at least 70% and more preferably about 75%.Type: GrantFiled: June 2, 2011Date of Patent: March 6, 2012Assignees: Bekaert Advanced FiltrationInventors: Martin Eurlings, Philippe Albert, Stefan Vandendijk
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Patent number: 8123942Abstract: A liquid filter assembly including a first liquid filter; a second different liquid filter element; a housing and a relief valve. The liquid filter assembly forms a first liquid flow path having the first liquid filter element therein, and a second liquid flow path having the second liquid filter element therein. The first liquid filter element forms a mixing chamber in a center of the first liquid filter element for mixing the liquid filtered by the first liquid filter element and the liquid filtered by the second liquid filter element. The relief valve is configured to allow liquid to bypass the second liquid flow path to mix with liquid filtered by the first liquid filter element in the mixing chamber.Type: GrantFiled: March 17, 2008Date of Patent: February 28, 2012Inventor: Norbert M. Assion
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Patent number: 8114291Abstract: A filter coalescer element for oil based industrial fuels includes a rigid, porous support tube, and a hydrophobic drainage layer covering the outer surface of the same. A single phase, dual function combination water coalescer and particle filter pleat block is positioned in the support tube, and is formed from a multilayer material having a first porous support layer, a synthetic microfiber layer, a synthetic fiber media layer and a second porous support layer. As the fluid passes through the pleat block, solid particles are physically filtered therefrom, and water is coalesced into droplets which pass from the pleats directly through the support tube and directly into the drainage layer, where the droplets grow into a size sufficient that they fall under gravity to the bottom of the element for collection.Type: GrantFiled: July 25, 2011Date of Patent: February 14, 2012Assignee: Kaydon Custom Filtration CorporationInventors: Jason A. Ellis, Ron J. Garrett
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Patent number: 8083941Abstract: An improved construction of filtration media of a wedge filter provides a performance on both surface and inner filtration mechanisms with offering many times recycled use by washable functions. Particularly a wedge filter plate is used to construct a hollow cylindrical type media of wedge filter.Type: GrantFiled: August 8, 2008Date of Patent: December 27, 2011Inventor: Huan-Jun Chien
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Patent number: 8043504Abstract: A filter cartridge that is designed to accommodate differences in lengths between an outer filter media and an inner filter media by providing a flexible connection between the inner filter media and the outer filter media. In addition, the endplates of the inner filter and the outer filter together define a gasket groove that receives a gasket. Using the endplates of the inner and outer filter media to define the gasket groove eliminates a mold parting line that can lead to fluid leakage.Type: GrantFiled: September 14, 2007Date of Patent: October 25, 2011Assignee: Cummins Filtration IP, Inc.Inventor: Gérard Malgorn
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Patent number: 8034240Abstract: A filter element includes a cylindrical housing enclosing a ring-shaped filter media assembly. The media assembly includes inner and outer media rings, moveably supported relative to one another, to remove particulate matter and water from a fluid stream. The outer ring surrounds the inner ring and is sealed by a first seal to the housing. An end cap assembly at the upper end of the element includes an annular end cap piece attached to an upper end of the inner ring, a flat plate, and a threaded flange portion bounding the periphery of the plate. A second seal is provided between the upper end cap of the inner ring, and an upper end cap of the outer ring. The housing is secured to the media assembly by forming an open end of the housing around the flange portion.Type: GrantFiled: June 5, 2009Date of Patent: October 11, 2011Assignee: Parker-Hannifin CorporationInventors: Cheryl M. Reiland, Walter H. Stone
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Patent number: 8017011Abstract: A filter coalescer element for oil based industrial fuels includes a rigid, porous support tube, and a hydrophobic drainage layer covering the outer surface of the same. A single phase, dual function combination water coalescer and particle filter pleat block is positioned in the support tube, and is formed from a multilayer material having a first porous support layer, a synthetic microfiber layer, a synthetic fiber media layer and a second porous support layer. As the fluid passes through the pleat block, solid particles are physically filtered therefrom, and water is coalesced into droplets which pass from the pleats directly through the support tube and directly into the drainage layer, where the droplets grow into a size sufficient that they fall under gravity to the bottom of the element for collection.Type: GrantFiled: August 30, 2006Date of Patent: September 13, 2011Assignee: Kaydon Custom Filtration CorporationInventors: Jason A. Ellis, Ron J. Garrett
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Publication number: 20110210059Abstract: A non-pleated depth filter element in the form of a tubular ring of depth filter media is provided. Multiple wraps of sheets, some including fine fibers, are employed. The depth filter element has particular applications to liquid filtration applications.Type: ApplicationFiled: February 23, 2011Publication date: September 1, 2011Applicant: CLARCOR INC.Inventors: Thomas B. Green, Lei Li, John A. Krogue
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Patent number: 7998349Abstract: The present invention relates to a device having two or more separate filtration layers that can be independently tested for integrity yet which allow for serial filtration through the two or more layers to obtain the desired characteristics such as retention. The device is made of two or more filtration areas, each containing one filter layer. Each area has one filtration layer and a first endcap bonded to a first end of the filter and a second endcap bonded to a second end of the filter. The areas are arranged concentrically around each other such that the first area is inward of the second area which is inward of a third area and the like. Each area is formed separately and integrity tested separately before final assembly. The first area is slid into the inside of the second area and then the two endcaps are either bonded to each, bonded to a third overall endcap or overmolded by a third endcap.Type: GrantFiled: September 25, 2006Date of Patent: August 16, 2011Assignee: Millipore CorporationInventor: Kevin Rautio
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Patent number: 7992723Abstract: A filter includes filter media and a housing surrounding the media. The housing has an outlet and is sealed such that all fluid flow out of the outlet must first enter the cartridge and pass through the media. The housing has multiple inlet flow paths configured so that fluid impinging on the housing is diffused as it enters the cartridge and is prevented from flowing directly towards the filter media.Type: GrantFiled: October 25, 2007Date of Patent: August 9, 2011Assignee: PTI Technologies, Inc.Inventors: Michael S. Sandford, Kanwar Suri, Michael L. Gao, Rowland Ellis
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Patent number: 7981300Abstract: Systems and methods for treating water passing through a catch basin may include first and second filters. In some embodiments, one or both of the filters can have a plurality of regions with different nominal flow rates.Type: GrantFiled: February 8, 2010Date of Patent: July 19, 2011Inventor: Todd Wacome
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Patent number: 7935255Abstract: A filter cartridge configured as a filter-in-filter design with an inner filter and an outer filter. The filter cartridge has features, for example an overhanging lip, to engage with a lid of a filter housing in which the cartridge is installed such that the lid is connected to the cartridge. As a result, the cartridge can be connected to the lid to facilitate installation and removal of the cartridge. Alternatively, the same features that allow connection with the lid permit a user to manually grasp the cartridge during installation and removal so that the cartridge can be used without a lid having attachment features. The filter cartridge is also designed to enable use of a longer inner filter within the outer filter. A longer inner filter increases the amount of filter media available for filtering the fluid.Type: GrantFiled: September 6, 2007Date of Patent: May 3, 2011Assignee: Cummins Filtration IP, Inc.Inventor: Zemin Jiang
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Publication number: 20110097223Abstract: An oil filter for use in an electric motor forming part of a downhole device such as an ESP, comprising a two-part filter including a first part formed from a porous material which acts to filter solid particulate material from the motor oil, and a second part comprising a sorbent for removing aqueous liquids from the motor oil.Type: ApplicationFiled: January 31, 2008Publication date: April 28, 2011Applicant: Schlumberger Technology CorporationInventors: Stanislav Nikolaevich Verichev, Jacques Orban, Evgeny Mikhailovich Sviridov
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Patent number: 7922006Abstract: A filter assembly is provided which includes an outer filter sleeve formed at least in part by a plurality of pleats, an inner filter sleeve formed at least in part by a plurality of pleats, wherein the inner and outer filter sleeves define a passage therebetween. An inlet cap is secured to a first end of the inner and outer filter sleeves and it has at least one inlet port communicating with the passage, and an end cap is secured to a second end of the inner and outer filter sleeves and it has an end surface closing the passage. Methods of forming such a filter assembly are also provided.Type: GrantFiled: June 29, 2007Date of Patent: April 12, 2011Assignee: 3M Innovative Properties CompanyInventors: Brian L. Fall, Thomas J. Hamlin, Mahesh Z. Patel, John L. Pulek, Aaron Spearin
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Patent number: 7887704Abstract: One embodiment is a filter element including an outer filter media and an inner filter media. The outer filter media is operable to remove particulates present in a flow of fluid and/or coalesce water contained in the flow of fluid. The inner filter media is operable to remove particulates from the flow of fluid, separate water form the flow of fluid, and remove particulates from the flow of fluid. Other embodiments include unique apparatus, devices, systems, and methods relating to fuel filters and filtration. Further embodiments, forms, objects, features, advantages, aspects, and benefits of the present application shall become apparent from the detailed description and figures included herewith.Type: GrantFiled: August 8, 2007Date of Patent: February 15, 2011Assignee: Cummins Filtration IP, Inc.Inventors: Zemin Jiang, Melvin Douglas McCormick, David P. Genter, Norman C. Blizard, Jeffrey A. Husband, Michael J. Connor, Wassem Abdalla, Barry M. Verdegan
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Patent number: 7857974Abstract: A filter cartridge for use in filtering fluids, for example fuel, lubrication, hydraulic and other liquids, as well as air. The filter cartridge is a filter-in-filter design with an inner filter and an outer filter. The inner filter and the outer filter, for example the bottom end plates thereof, are connected to each other via a snap fit connection mechanism. During manufacture, the inner filter can be inserted into the outer filter, with the snap fit connection mechanism retaining the inner filter in the outer filter.Type: GrantFiled: September 6, 2007Date of Patent: December 28, 2010Assignee: Cummins Filtration IP, Inc.Inventor: Zemin Jiang
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Publication number: 20100320138Abstract: A grafted nonwoven substrate is disclosed having average fiber sizes of 0.7 to 15 microns, and a void volume of 50 to 95%, and a polymer comprising anionic monomer units grafted to the surface of the nonwoven substrate. The article may be used as a filter element to purify or separate target materials, such as monoclonal antibodies (MAb), from a fluid mixture.Type: ApplicationFiled: June 21, 2010Publication date: December 23, 2010Inventors: Clinton P. Waller, JR., Douglas E. Weiss, Catherine A. Bothof, Kannan Seshadri
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Patent number: 7850756Abstract: A housing, which may be a filter housing, has break-away lock structure preventing movement in response to normal release force, and breaking-away from a housing section upon excessive release force, such that the housing may be re-assembled using the same housing sections, without having to use a new housing section to replace an old housing section otherwise having a non-re-mountable broken-off lock member.Type: GrantFiled: April 19, 2007Date of Patent: December 14, 2010Assignee: Cummins Filtration IP, Inc.Inventor: Michael J. Senetar, III
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Patent number: 7833307Abstract: A filter includes a housing having an air inlet, an air outlet, a first chamber and a second chamber concentric to and interior the first chamber. A coalescer is in the first chamber and a first filter is in the second chamber. A first inlet of the first chamber is interior the coalescer and connected to the air inlet and a first outlet of the first chamber being exterior the coalescer. A second inlet of the second chamber is interior the first filter and connected to the first outlet of the first chamber and a second outlet of the second chamber is exterior the first filter and connected to the air outlet. The filter includes a membrane separator in the housing connecting the second outlet of the second chamber and the air outlet. The filter may be mounted in a reservoir with the membrane separator extending into the reservoir.Type: GrantFiled: April 17, 2007Date of Patent: November 16, 2010Assignee: New York Air Brake CorporationInventors: Eric Wright, Richard Kohar
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Publication number: 20100206796Abstract: The invention relates to a filter device for fluids, particularly hydraulic or lubricating oils, having a filter element (1) comprising at least one inflow region (5) for a fluid to be cleaned, characterized in that an adapter element (7) covering the inflow region (5) and forming a trap device for organic substances such as fatty particles and colloidal oil aging products may be attached to the filter element (1).Type: ApplicationFiled: July 24, 2008Publication date: August 19, 2010Inventors: Viktor Josef Lauer, Daniel Kleemann
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Patent number: 7749383Abstract: A filter cartridge in a filter-in-filter design with an inner filter and an outer filter. A mechanism, for example crush ribs, connects an upper end plate of the outer filter and an upper end plate of the inner filter to prevent relative axial and radial movement therebetween when assembled. Relative axial or radial motion can create a rattling noise which is sometimes perceived as a low quality filter. The crush ribs are, for example, formed on an interior surface of the upper end plate of the outer filter, and the ribs engage an outer perimeter of the upper end plate of the inner filter. One or more of the ribs crush when the inner filter is installed into the outer filter to ensure tight axial and radial engagement between the filters.Type: GrantFiled: September 6, 2007Date of Patent: July 6, 2010Assignee: Cummins Filtration IP, Inc.Inventor: Zemin Jiang
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Patent number: 7704397Abstract: A fluid filter includes a first filter, a second filter coaxial with the first filter, an inlet adjacent the first and second filters, a first outlet adjacent the inlet, and a second outlet at a distal end from the inlet and the first outlet. Further, the first and second filters may be housed in a unitary canister or a canister that has a canister body coupled to a removable canister cap. The bypass flow filter includes a cap having a plurality of blades.Type: GrantFiled: June 21, 2006Date of Patent: April 27, 2010Assignee: Filtran LLCInventors: Leroy J. Meddock, Mark T. Meddock, Kenneth Swanson
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Patent number: 7704464Abstract: Hydrocarbon processing devices and systems are constructed to modify the combustion characteristics of hydrocarbon fuels and emissions for the purpose of emissions reduction and to increase the overall performance characteristics of the engine. According to one exemplary embodiment, a catalytic device for processing a fluid containing hydrocarbons includes a reactive body formed of a plurality of metallic materials arranged in a layered structure. The plurality of metallic materials is formed of at least two different materials. The body has an inner core member having a first density and another region, that is formed along a longitudinal length of the rolled layered structure, has a second density which is less than the first density.Type: GrantFiled: September 19, 2005Date of Patent: April 27, 2010Assignee: 0783963 BC Ltd.Inventor: Jeffrey A. Stephenson
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Patent number: 7704396Abstract: A fluid filter includes a first filter, a second filter coaxial with the first filter, an inlet adjacent the first and second filters, a first outlet adjacent the inlet, and a second outlet at a distal end from the inlet and the first outlet. Further, the first and second filters may be housed in a unitary canister or a canister that has a canister body coupled to a removable canister cap. First and second springs urge each of the filters into sealing contact with respective gaskets at opposite ends of the device.Type: GrantFiled: June 21, 2006Date of Patent: April 27, 2010Assignee: Filtran LLCInventors: Leroy J. Meddock, Mark T. Meddock, Kenneth Swanson
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Patent number: 7658857Abstract: Systems and methods for treating water passing through a catch basin may include first and second filters. In some embodiments, the filters each have a plurality of regions with different nominal flow rates.Type: GrantFiled: January 8, 2008Date of Patent: February 9, 2010Inventor: Todd Wacome
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Patent number: 7645381Abstract: A water dispenser including a water inlet adapted to receive water from a water supply, a water filter operative to filter water received from the water supply via the water inlet, a water outlet operative to provide filtered water received from the water filter, a water spill collector and a pivotably mounted drainage-equipped water container support having a first operative orientation underlying the water outlet and defining a downwardly inclined water spill drainage pathway communicating with the water spill collector and a second, non-operative, orientation not underlying the water outlet.Type: GrantFiled: December 13, 2007Date of Patent: January 12, 2010Assignee: Tana Industries (1991) Ltd.Inventors: Michael Oranski, Avner Sadot, Israel Heifetz, Yoav Dracher
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Patent number: 7635429Abstract: A compact filter element with a large filter surface area having inner and outer rings of filter material with an annular space between them, such that fluid to be filtered can be introduced into the annular space between the rings of filter material and a portion thereof can flow through the outer ring of filter material to the periphery of the filter element and another portion thereof can flow through the inner ring of filter material to the center of the filter element; at least one fluid-permeable support member for the filter material, and at least one end disk on an axial end face of the filter element affixed to the rings of filter material in a sealed manner, in which the end disk has a centrally arranged inlet opening for the fluid to be filtered and one or more radially extending distributor channels leading from the central inlet opening to at least one eccentrically arranged outlet opening which opens into the annular space between the rings of filter material to admit fluid to be filtered to theType: GrantFiled: September 15, 2006Date of Patent: December 22, 2009Assignee: Mann + Hummel GmbHInventors: Ralf Bauder, Michael Wolf, Karlheinz Muenkel, Joachim Stinzendoerfer, Duc Cuong Nguyen, Oliver Scherer, Martin Gruber
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Patent number: 7527739Abstract: An apparatus, system, and method are disclosed for multistage water separation. A first separation layer separates water droplets from a fuel flow by repelling the first water droplets. A coalescing layer may coalesce fine water droplets in the fuel flow. In one embodiment, a centrifugal separator directs the fuel flow tangentially to a filter wall and the centrifugal force of the fuel flow directed tangentially along the filter wall biases water droplets from the fuel flow. A second separation layer separates second water droplets from the fuel flow.Type: GrantFiled: August 15, 2005Date of Patent: May 5, 2009Assignee: Fleetguard IncInventors: Zemin Jiang, Ted S. Loftis, Mark J. Johnson, Barry M. Verdegan
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Publication number: 20090026125Abstract: The invention relates to a filtering apparatus in which improvement of maintenance of a driving system, reduction of the number of components, and ease of assembly are achieved.Type: ApplicationFiled: July 22, 2008Publication date: January 29, 2009Inventors: Dai Takao, Motomi Ono, Kotaro Neo
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Patent number: 7479219Abstract: A filter device 10 for fluids, especially for motor oil, hydraulic oil, has a filter case 1 comprising one or two filter inlets 2 and one filter outlet 3. The filter case contains one filter 4 consisting of at least two ring-shaped filter elements 7, 8 which concentrically enclose a central tube 18 of the filter device. In a channel 14 between the two adjacent filter elements there is a duct 16 which is run in the form of a spiral around inner filter element 8 and is embedded in filter 4. In duct 16 there is a pressure-controlled regulating valve 9 which opens when a certain level of pressure is exceeded in the filtered oil.Type: GrantFiled: August 5, 2004Date of Patent: January 20, 2009Inventor: Guenther Rassinger
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Patent number: 7445711Abstract: The invention relates to an assembly with a filter housing and at least one filter cartridge. The at least one filter cartridge is tubular, has a tube wall provided with a filter and comprises a central discharge channel with a discharge connection for discharge of filtered medium. The tube wall has a filter through which the medium to be filtered is able to flow transversely to the tube wall. The filter housing has a filter chamber, surrounded by a side wall, in which the at least one filter cartridge is accommodated with the longitudinal direction parallel to the side wall. The invention furthermore is directed to a filter cartridge intended for such an assembly.Type: GrantFiled: October 23, 2003Date of Patent: November 4, 2008Assignee: Indufil B.V.Inventors: Peter Alexander Josefus Pas, Frits Nicolaas Johannes Jacobus Greter
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Publication number: 20080110819Abstract: An improved oil conditioning filter, for use with an internal combustion engine, includes a mechanically active filter element and a chemically active filter element containing a beneficial additive therein. The beneficial additive is provided to extend the useful life of lubricating oil in an internal combustion engine. The beneficial additive may include an antioxidant, an anti-wear agent, and/or a basic salt. In a preferred embodiment of the invention, the chemically active conditioning agent is provided in a plurality of particles disposed within the oil filter housing. The particles may be bonded together to form an integral porous filter element having spaces defined between the particles thereof. The particles are made either by a hot extrusion process or by a solvent process.Type: ApplicationFiled: November 5, 2007Publication date: May 15, 2008Inventors: Ronald Paul Rohrbach, Gordon William Jones, Peter D. Unger, Daniel E. Bause
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Publication number: 20080099382Abstract: A fluid filter device includes a container having a passage for a fluid to flow through the container, and having an inner peripheral chamber for receiving a filter medium which includes a bore communicating with the passage of the container, one or more guide members are disposed in the bore of the filter medium for stirring the fluid and for converting the fluid into an eddy flow. A filter screen is disposed and engaged with the filter medium for anchoring the filter medium. The filter medium includes a number of grooves for receiving particles or contaminants. One or more magnetic devices may be disposed in or on the container for attracting and collecting the metal particles or contaminants.Type: ApplicationFiled: November 1, 2006Publication date: May 1, 2008Inventor: Hui Chen Shih
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Patent number: 7344579Abstract: A pipe trap comprising a body, a disc filter, a pipe and a plurality of mesh filter suitable for filtering gases is provided. The pipe trap body has a gas inlet and a gas outlet. The disc filter and the mesh filters are enclosed inside the pipe trap body. One end of the pipe connects with the disc filter and the other end of the pipe connects with the gas outlet. The mesh filters are enclosed inside the pipe. Using a multi-stage filtering method, liquid matter separates out first and then gaseous particles are filtered according to the particle size so that the pipe trap has a high filtering efficiency.Type: GrantFiled: May 18, 2004Date of Patent: March 18, 2008Assignee: Powerchip Semiconductor Corp.Inventors: Ping-Yang Chen, Chih-Peng Liao, Chin-Chi Chen, Shu-Ming Kuo, Yi-Chang Yang, Jui-Yuan Lin
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Publication number: 20080053888Abstract: A filter coalescer element for oil based industrial fuels includes a rigid, porous support tube, and a hydrophobic drainage layer covering the outer surface of the same. A single phase, dual function combination water coalescer and particle filter pleat block is positioned in the support tube, and is formed from a multilayer material having a first porous support layer, a synthetic microfiber layer, a synthetic fiber media layer and a second porous support layer. As the fluid passes through the pleat block, solid particles are physically filtered therefrom, and water is coalesced into droplets which pass from the pleats directly through the support tube and directly into the drainage layer, where the droplets grow into a size sufficient that they fall under gravity to the bottom of the element for collection.Type: ApplicationFiled: August 30, 2006Publication date: March 6, 2008Inventors: Jason A. Ellis, Ron J. Garrett
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Patent number: 7323106Abstract: A filter has multiple pleated filter elements having axially extending channels having a transverse pleat channel height and a lateral channel width. The pleated filter elements have different channel heights.Type: GrantFiled: October 11, 2005Date of Patent: January 29, 2008Assignee: Fleetguard, Inc.Inventors: Tadeusz Jaroszczyk, Mark A. Terres, Scott W. Schwartz, Eric A. Janikowski, Jeffrey S. Morgan, Barry M. Verdegan, Scott P. Heckel, Caryn J. Christianson, Jerald J. Moy, Murray R. Schukar
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Publication number: 20070289914Abstract: A filter that reduces microorganisms or chlorine from tap water and has at least one membrane that has at least one layer. The at least one layer is a fabric layer sputtering-coated with silver particles.Type: ApplicationFiled: June 16, 2006Publication date: December 20, 2007Inventor: Chih-Cheng Yang
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Publication number: 20070267337Abstract: A filter assembly has a housing and a filter. The housing has a base, a cover with a outlet, an outer filter screen being tubular, an inner filter screen being tubular and a metal net being tubular. Lower edges and upper edges of the outer filter screen, the inner filter screen and metal net are respectively fastened on the base and the cover. The inner filter screen is surrounded by the outer filter screen. The metal net is surrounded by the inner filter screen. The filter is mounted between the outer filter screen and the inner filter screen and fitters impurities even with small dimension. Thus, the filter assembly will remove the impurities clearly to prevent a cylinder and a piston in an internal combustion engine from being rubbed.Type: ApplicationFiled: May 10, 2007Publication date: November 22, 2007Inventor: Jhu Cing Yang
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Patent number: 7279091Abstract: A filter device has a filter housing (10) receiving a first filter element (12), through which a medium may flow in a given direction, and has a bypass device (22). Along with the first filter element (12), a second filter element (32) is provided. The filter elements are arranged in series, one behind the other, in the direction of flow. When the bypass device (22) is activated, the second filter element (32), immediately following in the direction of flow, filters the medium. The second filter element thus takes over the main filtration of the medium on actuation and operation of the bypass device, since the first filter element is essentially no longer available for a filtration process due to the bypass device.Type: GrantFiled: January 12, 2002Date of Patent: October 9, 2007Assignee: Hydac Filtertechnik GmbH.Inventors: Norbert Sann, Werner Wilkendorf
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Patent number: 7247237Abstract: A fluid cleaning filter of the present invention consists of a composite matrix composed of a pleated substrate 2 configured into a pleated shape and an active carbon-containing layer 3, wherein the pleated substrate 2 is made of polyurethane foam 2a having a three-dimensional network skeletal structure, and the composite matrix is configured into a cylindrical shape. A filtering medium layer 2b made of fibers is formed on the surface of the polyurethane foam 2a facing the active carbon-containing layer 3. The fibers of the filtering medium layer maybe electrostatically charged. The fluid cleaning filter exhibits good efficiency of dust collecting and deodorization even when a fluid flows through the filter at high rate.Type: GrantFiled: July 13, 2004Date of Patent: July 24, 2007Assignee: Bridgestone CorporationInventors: Hisashi Mori, Tadashi Kuwahara, Yasushige Shigyo
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Patent number: 7182856Abstract: A system is provided for treating runoff water in which there is a separator and a filter for cleaning the water. A reservoir is provided to hold large quantities of water during prolonged rainstorms. The output of the reservoir is fed to the filter. The rate of flow from the reservoir to the filter is controlled and limited to flow rates at which the filter can efficiently clean the water.Type: GrantFiled: November 27, 2002Date of Patent: February 27, 2007Inventor: Thomas E. Pank
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Patent number: 7125434Abstract: A deep gradient-density filter device capable of effectively filtering a fluid containing a distribution of particles in the range of approximately 25 microns to approximately 0.2 micron at a fluid velocity of at least approximately 100 cm/hr and an initial hydraulic permeability of greater than approximately 10 cm/hr/psi. The deep gradient-density filter device includes several layers of filtration material, each having specific predetermined particle retention properties. In one product embodiment, the deep gradient-density filter device uses “loose” fibrillated cellulose fiber material as a primary filter element. In a method aspect, the deep gradient-density filter device is used for either the secondary clarification of industrial-scale volumes of cultured or fermented protein-containing biopharmaceutical fluids or the primary clarification of pilot-scale volumes.Type: GrantFiled: December 19, 2002Date of Patent: October 24, 2006Assignee: Millipore CorporationInventors: David P. Yavorsky, Jonathan Royce, Matthew Alexander Tomasko, Ven Anantha Raman
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Patent number: 7118673Abstract: The present invention involves a filter element assembly (10), which is useful in removing undissolved adhesive bodies from oil. The assembly includes at least one cylindrical body 11 of principal filter medium for removing particulates from oil. Body 11 has an inlet end and an outlet end. A secondary filter medium 20 for removing undissolved adhesive bodies from the oil is located around the sides and across the inlet end of the principle medium (11). A flow affording spacer 926) is disposed between the sides and the inlet end of the principal medium (11). A preferred spacer (26) is a non-woven expandible mesh present in a partially expanded state and having elements (27,28) grouped in first and second sets in which the elements (27) in the first set are laid atop the elements (28) in the second set. A readily cleanable containment vessel (39) for the filter element assembly (10) includes a tubular body (41) which is releasably connectible in liquid tight relation to a bottom cover (44) for the body (41).Type: GrantFiled: July 17, 2002Date of Patent: October 10, 2006Assignee: HTI Filtration CorporationInventor: Steven C. Parker
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Patent number: 7115204Abstract: A filter comprises a cage that captures a foraminous center tube. The cage comprises end plates secured to multiple posts. A screen is wrapped with at least one full inner wrap around the center tube and with at least one full outer wrap around the posts. The screen is held in place with elastic bands or the like that surround and press the outer wrap against the posts. The center tube may be free to move within the cage. Alternately, the center tube, end plates, and posts may be integral with each other. When inserted into a chamber, liquid flows through the screen outer and inner wraps in two stages. The liquid then flows through holes in the center tube, through the interior of the center tube, and out the chamber. The filter is cleaned by unwrapping the screen, cleaning it, and rewrapping it over the center tube and posts.Type: GrantFiled: November 17, 2003Date of Patent: October 3, 2006Inventor: Ernest D. Frasier
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Patent number: 7087166Abstract: Providing a filter device with various functions, such as remarkable improvement of the throughput of the downstream filter, ion-removing property of the upstream filter. A filter element comprises an upstream filter and a downstream filter made of the same or different material and installed into one housing or container, wherein said downstream filter is fixed to said housing, said upstream filter is fixed to said downstream filter, both filters are concentrically arranged to each other, and when the downstream filter is not contaminated, only the upstream filter can be replaced with fresh one.Type: GrantFiled: October 1, 2001Date of Patent: August 8, 2006Assignee: Entegris, Inc.Inventors: Kazunori Sudo, Yoshiki Nomura
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Patent number: 7081201Abstract: An encapsulated filter cartridge is disclosed, which includes a filter assembly including a carbon block filter element and a microporous filter element. The filter cartridge has a permanently sealed sump defining an interior chamber configured to accommodate the filter assembly, the sump having an inlet for permitting unfiltered fluid to enter the interior chamber for communicating with the radially outer surface of the filter assembly and an outlet for permitting filtered fluid to exit the interior chamber from the axial portion of the filter assembly. The microporous filter element of the filter assembly may include a hollow fiber subassembly housed within the axial cavity of the carbon block element, said fiber subassembly including a plurality of hollow microporous fibers, or a pleated filter element surrounding the radially outer surface of the carbon block element.Type: GrantFiled: April 18, 2003Date of Patent: July 25, 2006Assignee: 3M Innovative Properties CompanyInventors: Laurence W. Bassett, Martin Blaze, Thomas Hamlin
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Patent number: 6986843Abstract: Water purifier includes a container having a room, a filtering material disposed in the room for purifying water for catching particles and fungi such as polio viruses. The filtering material is a sintered activated carbon block filter having pores. The filtering material preferably has a first filtering material and a second filtering material. One thing out of the first filtering material and the second filtering material is formed of a sintered activated carbon block filter whose average pore diameter is relatively small and whose amount of penetrating water is relatively small per unit time. Another thing out of the first filtering material and the second filtering material is formed of a sintered activated carbon block filter whose average pore diameter is relatively large and whose amount of penetrating water is relatively large per unit time.Type: GrantFiled: August 1, 2002Date of Patent: January 17, 2006Assignee: TYK CorporationInventors: Shigeo Tochikubo, Ichiro Tomatsu, Takeshi Kachi, Kazuto Matsue
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Patent number: 6984319Abstract: An environmentally friendly acid neutralizing filter cartridge is adapted to be mounted in a cartridge mounting body of an engine oil circuit for filtering particulates and neutralizing acid in oil. The filter cartridge comprises a support housing that comprises substantially no metal parts such that the filter cartridge can be readily incinerated. A full flow particulate filter and a bypass particulate filter are arranged in the support housing. A bed of acid neutralizing particles is contained in the support housing. The housing is configured such that a predetermined primary flow path is defined through the filter cartridge that passes through the full flow particulate filter and bypassing the bed of acid neutralizing particles; and a predetermined bypass path is defined through the filter cartridge that passes, in sequence, through the bed of acid neutralizing particles and the bypass particulate filter.Type: GrantFiled: June 9, 2003Date of Patent: January 10, 2006Assignee: Baldwin Filters, Inc.Inventors: Steven J. Merritt, Gene W. Brown
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Patent number: 6942796Abstract: A filter unit is disclosed suitable for use in a filter housing. The filter unit comprises superposed and spaced-apart inclined lamellar structures, preferably in the form of hollow truncated cones, each having a lower end side opposite an upper end side and a passage for a flow of liquid between each two of the lamellar structures. Each passage has an inlet for receiving an inflow of liquid to be filtered and an outlet for discharging an outflow of filtered liquid. In each of the passages, an overflow dam wall following a sinuous path is obstructing the flow of liquid and retains particulate matter contained in the liquid. The filter unit is mounted vertically in a filter housing. The invention also concerns a prefilter comprising a filter unit as described above mounted vertically in a filter housing.Type: GrantFiled: March 23, 2001Date of Patent: September 13, 2005Assignee: Premier TechInventors: Roger Lacasse, Pierre Talbot, Henri Ouellet, Bernard Juneau
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Patent number: 6818122Abstract: A replaceable cartridge type dual stage bypass valve is used in dual filter multi-media filtration assemblies. The cartridge may be selected and easily replaced to meet the various combinations and requirements of the dual filter elements (primary and secondary). The individual bypass valves that form the dual stage bypass valve may each be responsive to a predetermined increase of pressure due to a clogged filter condition. The individual bypass valves may use replaceable coil springs. The spring force of the coil spring is determined by the pressure differential to be resisted, i.e., the resistance to be offered by the spring action of the spring, and the flow capacity at a given pressure differential.Type: GrantFiled: August 23, 2002Date of Patent: November 16, 2004Assignee: PTI Technologies, Inc.Inventor: Bijan Mouhebaty