Concentric, Convolute Or Pleated Patents (Class 210/487)
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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: 7848475Abstract: A strainer for an emergency core cooling system (ECCS) in a nuclear power plant comprises a perforated strainer element that is immersed in a reservoir of cooling water, which is drawn through the strainer element into the emergency core cooling system. The side of the strainer element in contact with the cooling water has a contoured configuration for disrupting the formation of a flat bed of fibrous material that can trap small particulate material intended to pass through the strainer element. Incorporating this strainer element into an ECCS strainer enables the strainer to be made more compact, because the debris bed need not be spread over an unduly large area to prevent excessive head loss from the debris load in the event of a reactor loss of coolant accident. The strainer also incorporates a modular construction that uses individual strainer disc modules. Each disc module includes a perforated first disc part having a central opening and a perforated second disc part also having a central opening.Type: GrantFiled: May 3, 2005Date of Patent: December 7, 2010Assignee: Continuum Dynamics, Inc.Inventors: Andrew E. Kaufman, Alan J. Bilanin
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Publication number: 20100294712Abstract: A filter cartridge is described that is designed to accommodate for example dual stage filtration. The filter cartridge has an endplate structure formed of a heat cured material, such as polyurethane, where at least one of the top end and the bottom end of the outer filter and the inner filter are embedded within the heat cured material. The heat cured material can provide an endplate structure that is convenient for manufacture and that has one or more sealing surfaces to seal with a housing that the filter cartridge is assembled with. For example, the heat cured material of the endplate can seal non-filtered fluid from filtered fluid that has passed through each of the filtration stages available in the cartridge.Type: ApplicationFiled: May 21, 2009Publication date: November 25, 2010Applicant: Cummins Filtration IP Inc.Inventors: Wassem Abdalla, Ricky England, Sainath R. Racha, Eric R. Burgan, Jeffrey A. Husband
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Publication number: 20100243554Abstract: Some embodiments of the disclosure are directed to a fluid filter assembly including an outer filter element having a hollow core and an inner filter element having a hollow core. The inner filter element can be positioned within the hollow core of the outer filter element, thereby defining an internal fluid passage. In some embodiments, the first end of the outer filter element and the first end of the inner filter element can be supported by an open endcap assembly, which can also include a fluid inlet in fluid communication with the internal fluid passage. In some embodiments, at least one of the filter elements can include a pleated filter media.Type: ApplicationFiled: March 25, 2009Publication date: September 30, 2010Inventors: Nathan Herrin, Robb Benson, Mathews Thundyil, Mohammad Farooq, Doug Mittlesteadt
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Publication number: 20100206820Abstract: Fluid treatment arrangements having at least first and second radially displaced sets (12,13) of fluid treatment elements and methods for making and using them are disclosed: A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element of either set. At least two and as many as fifty or more fluid treatment elements (14?, 14?) may be positioned along a hollow core assembly (11) in each set. Fluid may be directed to or from the interior of the core assembly through a fluid treatment element of the first set and a fluid treatment element of the second set. In each fluid treatment element, fluid flows generally edgewise through the permeable fluid treatment medium.Type: ApplicationFiled: March 14, 2008Publication date: August 19, 2010Applicant: PALL CORPORATIONInventors: Thomas Welch, JR., Tanweer ul Haq, Joseph Verschneider
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Publication number: 20100187189Abstract: Fluid treatment arrangements and elements and methods for making and using fluid treatment arrangements are disclosed. A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element having a disk-shaped body. For some embodiments, the ribbon may comprise a composite having first and second layers. Up to one hundred or more fluid treatment elements may be positioned along a core assembly with spaces between at least some of the adjacent fluid treatment elements. Posts may be located in some of the spaces and may be bonded to the adjacent fluid treatment elements. Bands may encircle some of the spaces to block radial fluid flow into or out of the spaces. A fluid treatment arrangement may be contained in a housing to form a fluid treatment assembly. The housing may include an inlet port and an outlet port and may define a fluid flow path between the inlet port and the outlet port.Type: ApplicationFiled: March 14, 2008Publication date: July 29, 2010Applicant: PALL CORPORATIONInventors: Thomas Welch, JR., Tanweer ul Haq, Joseph Verschneider
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Publication number: 20100176068Abstract: The assemblies of the invention can comprise a fine fiber layer having dispersed within the fine fiber layer an active particulate material. Fluid that flows through the assemblies of the invention can have any material dispersed or dissolved in the fluid react with, be absorbed by, or adsorbed onto, the active particulate within the nanofiber layer. The structures of the invention can act simply as reactive, absorptive, or adsorptive layers with no filtration properties, or the structures of the invention can be assembled into filters that can filter particulate from a mobile fluid while simultaneously reacting, absorbing, or adsorbing materials from the mobile fluid.Type: ApplicationFiled: December 29, 2009Publication date: July 15, 2010Applicant: DONALDSON COMPANY, INC.Inventors: Andrew James Dallas, Lefei Ding, Jon Dennis Joriman, Dustin Zastera, James R. Giertz, Veli Engin Kalayci
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Patent number: 7740678Abstract: A filter element has first and second subelements providing increased media providing improved performance and packaging options. The first and second subelements provide first and second flow paths in parallel with each other along designated flow path portions.Type: GrantFiled: August 7, 2007Date of Patent: June 22, 2010Assignee: Cummins Filtration IP, Inc.Inventors: Larry T. Gunderson, Scott W. Schwartz, Scott P. Heckel, Brad Henke
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Publication number: 20100140161Abstract: The present invention is directed toward membrane leaf packets, spiral wound modules and methods for making and using the same. The subject leaf packet comprises a membrane sheet folded upon itself and reinforced with sealant and tape along at least a portion of the fold on the back side of the membrane sheet.Type: ApplicationFiled: December 9, 2008Publication date: June 10, 2010Inventors: Thomas N. Haynes, Pam G. Hinton, Jon E. Johnson, Thomas M. Lanz, Abhishek Shrivastava
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Publication number: 20100108598Abstract: A filter is provided by pleated filter media having a plurality of pleats defined by wall segments extending axially along an axial direction along an axis and extending transversely along a transverse direction between first and second sets of pleat tips at first and second sets of axially extending bend lines. The pleated filter media spans laterally along a lateral span along a lateral direction, with the wall segments being spaced from each other by lateral gaps. The pleats have a pleat depth along the transverse direction along the wall segments between the first and second sets of pleat tips. The pleat depth varies as the pleated filter media spans laterally along the lateral direction.Type: ApplicationFiled: December 8, 2009Publication date: May 6, 2010Applicant: CUMMINS FILTRATION IP INC.Inventors: William C. Haberkamp, Jerald J. Moy, Eric A. Janikowski, Mark A. Terres, Scott P. Heckel
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Publication number: 20100101993Abstract: A filter within a filter cartridge design is described that includes a sealing structure on an endplate of an outer filter element. Generally, the sealing structure includes an annular flange on the endplate that can directly seal against an interior surface of a housing when the filter cartridge is assembled for use. During filtration, the annular flange prevents a working fluid from bypassing the outer filter element. The sealing flange can seal with the housing in a press fit engagement.Type: ApplicationFiled: October 27, 2009Publication date: April 29, 2010Applicant: CUMMINS FILTRATION IP INC.Inventors: Aaron M. Wells, Terry W. Shults, Ismail C. Bagci, Dean Olson, Zemin Jiang, Kevin C. South, Peter K. Herman, Hendrik Amirkhanian, Jeffrey B. Sharp, David P. Genter, Norman C. Blizard, Melvin Douglas McCormick, Jeffrey A. Husband, Wassem Abdalla, Michael J. Connor, Barry M. Verdegan, Donna Butler, Chad T. Brummitt
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Publication number: 20100044301Abstract: A filter device for filtering fluid, in particular an oil filter, is provided. The filter device includes a first filter medium and a second filter medium, the first filter medium having a greater filter action than the second filter medium, and the filter media being folded in pleated form and having a plurality of folds, the first filter medium and the second filter medium being connected to one another in the longitudinal direction of the folds. An easily producible and highly effective filter device is thus achieved.Type: ApplicationFiled: August 21, 2009Publication date: February 25, 2010Applicant: IBS Filtran Kunststoff- / Metallerzeugnisse GmbHInventor: Wolfgang Stausberg
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Publication number: 20100011725Abstract: The present invention provides one or more reinforcing members configured to act together with the adhesive bonding between filter media layers to further resist axial deformation forces such as induced by fluid flowing through the filter and thereby acting to retain the structural form and integrity of the filter element. Also disclosed is a method of reinforcing layers of a multilayer axial filter element against displacement of the layers.Type: ApplicationFiled: July 17, 2008Publication date: January 21, 2010Applicant: MANN+HUMMEL GMBHInventor: Kevin Brian Babb
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Publication number: 20100006494Abstract: A filter coalescer cartridge for treating jet fuels is disclosed. The filter coalescer cartridge has spaced apart filter/coalescer layers to effectively remove particulate contaminates and water from the transient fuel being treated. The outer most layer is a knitted sock material formed from cotton threads including a metallic silver disposed thereon to provide an anti-microbial property to the sock material.Type: ApplicationFiled: July 11, 2008Publication date: January 14, 2010Inventors: Joan Scher, David Stanley Hawkins, Gregory S. Sprenger, Rob Perkins
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Publication number: 20100000936Abstract: The present invention provides hollow fiber membranes and a hollow fiber membrane module having the same included therein, which even when highly filled, can reduce the size of the module and simultaneously maintain a crimped state enabling a good flow of a dialysate or buffer in the module by an easy process, characterized in that the hollow fiber membrane is provided with a crimp having a wavelength of 15 to 25 mm and a crimp angle determined by the wavelength and an amplitude of 0.09 to 0.32.Type: ApplicationFiled: January 29, 2008Publication date: January 7, 2010Applicant: TORAY Industries, IncInventors: Masahiro Osabe, Osamu Nakamatsu, Hiroyuki Sugaya
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Publication number: 20090306704Abstract: In one embodiment of the present invention there is provided a filter having a first spiral support member having a first end and a second end, a second spiral support member positioned adjacent the first spiral support member to form an open loop between the first end and the second end of the first spiral support member; and a filtering structure attached to the open loop. In another embodiment of the present invention there is provided a filter having a first spiral support member having a first end and a second end; a second spiral support member positioned adjacent the first spiral support member to form a loop between the first end and the second end; a material covering a portion of the first and the second spiral support members; and a structure attached to the loop.Type: ApplicationFiled: August 14, 2009Publication date: December 10, 2009Inventors: Eric Johnson, Thomas Fogarty, Frank Arko, Jeff Elkins, Martin Seery
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Patent number: 7611559Abstract: A filter element (1) with a tubular folded bag (2) of folded filter material, which has a plurality of fold blades (3) adjacent each other in the longitudinal direction (10) of the folded bag (2) a closure cover (4) is attached at at least one axial end (7) of the folded bag (2). In order to provide a filter element which can be bent to any desired curved form while maintaining a high degree of filtration performance, and can be produced in a cost effective manner, the fold blades (3) of a folded bag (2) are provided with a combination of diagonal folds extending at an angle relative to each other such that the fold blades (3) in the longitudinal direction (10) of the folded bag extend back and forth and thereby form a three-dimensional crown structure (18). At least the outer margin of the closure cover (4) has a form corresponding to the crown structure (18) of the fold blades (3).Type: GrantFiled: February 7, 2007Date of Patent: November 3, 2009Assignees: Mann & Hummel GmbH, Universitaet Stuttgart Institut fuer FlugzeugbauInventors: Nikolaus Moser, Andreas Beck, Josef Rohrmeier, Matthaeus Huber, Markus Kolczyk, Michael Durst, Yves Klett, Klaus Drechsler, Rainer Kehrle
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Publication number: 20090266756Abstract: Filter module and filter unit with an inlet for medium that is to be filtered, and with an outlet for the permeate, with at least one filter sheet, a first spacer adjacent to the media side and a second spacer adjacent to the permeate side, the spacers being designed with a draining action, and the first spacer being connected to an inlet and the second spacer to an outlet, wherein the at least one filter sheet forms a first filter unit together with the two adjacent spacers, the filter sheet is designed as a single filter or a filter stack, the first spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the outlet end, and the second spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the inlet end.Type: ApplicationFiled: April 2, 2009Publication date: October 29, 2009Applicant: Sartorius Stedim Biotech GmbHInventors: Stefan Fischer-Fruehholz, Andre Pastor
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Patent number: 7473362Abstract: A media in the form of a multilayered semi porous composite membrane containing a strong positive electrical charge with a highly porous surface consisting of 60 to 90 percent void volume and pore size of about 2 micron capable of retaining negatively charged protozoa, bacteria, and virus as well as di-pole particulate matter as a result of the attraction of the positive charge. A housing is a portable adaptive housing containing and supporting the composite membrane. A low pressure stream of water is within the housing and passes through the media. A composite membrane is positioned within the adaptive housing in the path of the low pressure stream of water. The composite membrane is adapted to treat the low pressure stream of water under from 0.3 to 10 psig pressure delivering 5 to 30 ml/sec.Type: GrantFiled: February 21, 2008Date of Patent: January 6, 2009Inventor: John E. Nohren, Jr.
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Publication number: 20080308488Abstract: A filter apparatus is composed such that a filter element is housed and held in a cylindrical housing, which has one side open, so as to separate a flow-in side and a flow-out side of a fluid from each other. A filter element is basically composed of a filter body that is made by laminating and arranging plural sheet-like filter media with a gap. The filter element is formed by shaping the filter body into a pleated shape, and retaining the pleated shape.Type: ApplicationFiled: October 27, 2006Publication date: December 18, 2008Inventors: Keisaku Iwakata, Takashi Abe
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Publication number: 20080308497Abstract: A radial flow filter element (10) includes at least one wound body (14) comprising a radially extending filtration zone (20) with alternating co-wound liquid-permeable layers respectively of a predominantly cellulosic material and a predominantly synthetic plastics or polymeric material.Type: ApplicationFiled: November 29, 2006Publication date: December 18, 2008Inventors: Malcolm David Walker, Roger William Gemmell, Hector Brian Salzwedel
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Publication number: 20080257506Abstract: A rotary drum filter has a plurality of longitudinally extending division grids mounted about the outer circumference of a drum. A plurality of corrugated sheets are provided, with the leading and trailing edges of each sheet mounted to circumferentially adjacent pairs of division grids to define filtrate compartments. An equivalent number of perforated filter plates are also provided. Each filter plate is attached to the top of a corrugated sheet and has a leading edge and a trailing edge that are set back from the leading edge and trailing edge of the corrugated sheet. A seal clip is positioned near the leading edge of each corrugated sheet. A seal member or seal members is/are held in place by the seal clip and is/are positioned at the face of the leading edge of each corrugated sheet or beneath and near the face or each corrugated sheet.Type: ApplicationFiled: May 7, 2008Publication date: October 23, 2008Applicant: ANDRITZ INC.,Inventors: Todd S. Grace, Joseph A. Gottberg
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Publication number: 20080251444Abstract: A separation device comprises a cylindrical separation pack including a spirally wound porous medium, a feed channel including a shear region, a plurality of permeate passages extending along the permeate side of the porous medium opposite the shear region and perpendicular to the feed channel, a feed inlet, a retentate outlet, and a plurality of permeate outlets.Type: ApplicationFiled: November 13, 2007Publication date: October 16, 2008Applicant: PALL CORPORATIONInventors: Thomas J. Fendya, Mark F. Hurwitz, John D. Miller, Stephen A. Geibel, Marc Samson
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Publication number: 20080245726Abstract: A filter media and liner pleat block and method involves melting the filter media at mating pleats to form a closed-loop-bonded filter media and liner pleat block.Type: ApplicationFiled: April 5, 2007Publication date: October 9, 2008Inventor: Michael J. Senetar
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Patent number: 7425266Abstract: In at least some embodiments, a filter comprises a filtering media. The filtering media is impregnated with chemical compounds that effectively retain water molecules and water-alcohol molecules but not alcohol molecules. The filter also comprises a liquid channeling structure, wherein the liquid channeling structure directs liquid entering an input of the filter to flow through the filtering media before exiting an output of the filter.Type: GrantFiled: March 3, 2005Date of Patent: September 16, 2008Inventors: Mark C. Freeman, Jon J. Freeman, Clarence S. Freeman
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Publication number: 20080217238Abstract: A spiral filter has four layers wound around a central perforated outlet pipe. An input layer which extends not only around the outer sidewall but also to the top side and the bottom side of the filter receives the water to be filtered from all of said sides and feeds the incoming water through two layers containing a filtering media. The water then passes to an output layer which feeds the perforated outlet pipe.Type: ApplicationFiled: April 22, 2008Publication date: September 11, 2008Inventor: Thomas E. Pank
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Patent number: 7404493Abstract: The present invention provides a filter that can minimize the amount of residual liquid within the housing or container with a simplified construction. The article includes a cylinder portion having a cylindrical internal space with both ends open, a cylindrically formed pleated filter 5 inserted in the internal space of the cylinder portion 3 in contact with the inner wall of the cylinder portion 3 and having upper and lower edges liquid-tightly sealed. A perforate inner core 7 supports the inner surface of the pleated filter 5, lower and upper end caps 9, 11 are liquid-tightly bonded to the respective ends of the cylinder portion 3. A liquid distribution passage 21 communicates with gaps between the pleats of the pleated filter 5 from the lower portion of the cylinder portion 3. A liquid feed inlet 15 communicates with the liquid distribution passage 21 formed between the periphery of the pleated filter and a tapered inner wall surface 8 of the cylinder portion 3.Type: GrantFiled: March 23, 2005Date of Patent: July 29, 2008Assignee: Entegris, Inc.Inventor: Fumio Nozaki
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Publication number: 20080156718Abstract: The present invention relates to a spacer for membrane modules comprising at least one inserted element and support members, the support members being spaced apart by the at least one inserted element forming flow channels between the support members and the inserted element for guiding permeates to the at least one permeate collection device, which at least one permeate collection device being in perpendicular contact with the flow channels, or guiding concentrate through flow channel out of the membrane module. The invention relates further to a membrane module comprising the permeate spacer, uses of the membrane module and a spiral wound membrane comprising the permeate spacer.Type: ApplicationFiled: February 24, 2006Publication date: July 3, 2008Inventor: Knud Verner Larsen
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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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Patent number: 7314558Abstract: A pleated panel fluid filter filters fluid flowing along an axial flow direction and includes angled panels and/or progressively increasing flow channel width and/or skewed panel projections and/or flattened pleat tip bend lines.Type: GrantFiled: September 1, 2005Date of Patent: January 1, 2008Assignee: Fleetguard, Inc.Inventors: Tadeusz Jaroszczyk, Scott W. Schwartz, Eric A. Janikowski, Mark A. Terres, Murray R. Schukar, Barry M. Verdegan
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Patent number: 7311751Abstract: A filter medium includes at least a first and a second layer. Both first and second layers have a layer volume VLq and a layer filtering surface SLq, where SLq is the accumulation of all mantle surfaces of the fibers present in this layer q. The first layer has a SL1/VL1-ratio of less than 32500 m2/m3, and the second layer has a SL2/VL2-ratio being more than 1.1×SL1/VL1.Type: GrantFiled: December 5, 2002Date of Patent: December 25, 2007Assignee: NV Bekaert SAInventors: Feng Mei, Willy Marrecau
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Patent number: 7303083Abstract: A filter element support tube has a pair of axially extending spines and first and second sets of oppositely laterally extending half-rings axially offset from each other. The support tube is efficiently manufacturable, and desirably provides a constant diameter along its axial length.Type: GrantFiled: September 29, 2005Date of Patent: December 4, 2007Assignee: Fleetguard, Inc.Inventors: Gildas Le Men, Robert A. Bannister, Michael J. Connor, Michael R. Furseth
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Patent number: 7267769Abstract: A water purification system includes an activated carbon filter and a reverse-osmosis (RO) filter. The activated carbon filter is typically formed with a central aperture that receives an upper portion of a central tube. The RO filter, which is positioned downstream from the carbon filter, may be formed around a perforated section of the central tube. The system further includes a head that is structured to receive a sump that contains the carbon and RO filters, as well as the central tube. An inlet formed in the head enables unpurified feed water to flow into the carbon filter. A first channel, which is defined by an annular surface formed in the carbon filter and an outer surface of the central tube, enables water to flow into the RO filter. A channel within the central tube enables water to flow from the RO filter, through the perforated sections of the central tube, and into an outlet formed within the head.Type: GrantFiled: September 24, 2004Date of Patent: September 11, 2007Assignee: International Environmental Technologies, LLCInventor: Michael T. Baird
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Patent number: 7122068Abstract: A panel filter element has a pleated filter media having peaks and valleys arranged in pleated sets of first and second panels. The pleated sets are adhered along side edges to form clean-side pockets which open adjacent to the valleys. The first and second panels have elongated embossments projecting both into and away from the pockets to keep the pockets open and to keep the pleated sets separate. Dirty air flows into the filter media both transverse to the peaks and laterally between the pleated sets of first and second panels. By having dirty air to be filtered flowing both transversly and laterally, the dirt holding capacity of the filter is increased while increases in restriction are minimized.Type: GrantFiled: November 30, 2004Date of Patent: October 17, 2006Assignee: Wix Filtration Corp.Inventors: Jason LaMarr Tate, Edward Allen Covington, Roland Vann Lanier, Jr.
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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: 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: 7001517Abstract: A filter element assembly has at least two cylindrically shaped and concentrically arranged filter media sleeves each connected at one end thereof to an inlet plate and each connected at the other end to a closed end terminal plate. Openings are provided in the inlet plate to permit entry of liquid to be filtered into the annular space between the filter sleeves. The closed end terminal plate prevents flow of unfiltered liquid from the annular space between the sleeves so as to force the liquid through the porous media of the sleeves to effect filtration.Type: GrantFiled: October 8, 2002Date of Patent: February 21, 2006Inventor: Moshe Gershenson
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Patent number: 6986842Abstract: A fluid filter element (10) comprises a pleated filter media (34) having spaced apart pleats (40) and an external filter media surface (38) comprising the external peaks of the pleats (40) and a flexible foam filter media sleeve (42) in contact with and extending between the pleats of the peaks of the external filter media surface (38). The filter media sleeve (42) maintains the spacing between the external peaks of the pleats (40) of the pleated filter media (34). The pleated filter media (34) is for fluid applications and includes fragile material media layers (74, 76) between wire meshes (70, 80).Type: GrantFiled: January 26, 2005Date of Patent: January 17, 2006Assignee: Schroeder Industries, LLCInventors: Christopher B. Bortnik, Alexander Kiderman
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Patent number: 6929742Abstract: In the case of a fine filter for a fuel feed unit of a motor vehicle, a filter element has at least two sections which surround the fuel feed unit concentrically. In the fitted state of the fine filter, the sections are fastened to the fuel feed unit and to a surge chamber. The filter element has proven particularly cost-effective and enables the use of a particularly small mesh width while requiring little space.Type: GrantFiled: April 11, 2002Date of Patent: August 16, 2005Assignee: Siemens AktiengesellschaftInventors: Bernrd Wehrum, Gerd Weise
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Patent number: 6881330Abstract: A two-stage, retrofit filter is adapted for use with an electrical discharge machine (EDM) includes nested inner and outer filtering elements that may be placed as a unit in the same tank and over the apertured standpipe used for a one-stage filter, such that the fluid to be filtered now flows through each of the multiple filter elements. The retrofit EDM filter may be configured for flow in either direction, though the usual arrangement is one whereby the fluid being filtered flows up through the bottom of the tank, out the apertured standpipe, and into the inner filter element. Preferably, the filter elements are cylindrical, pleated elements composed of a technical grade filter paper. In the preferred embodiment, a pressure-operated release valve is provided in conjunction with the inner filter, such that when a predetermined pressure is reached due to the entrapment of contaminants by the inner filter, the valve opens to allow the fluid to be filtered to flow through the outer filter.Type: GrantFiled: March 19, 2002Date of Patent: April 19, 2005Assignee: Hoff Engineering Co., Inc.Inventors: E. Michael Doyle, Edward M. Doyle
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Patent number: 6877612Abstract: A filter cartridge for use in severe or harsh applications, such as acidic or alkaline environments or hot or cold temperatures. The inventive filter cartridge is constructed of a central, perforated core having reinforcing bands on the ends which is surrounded by a continuous tube of filtration material and bounded by end caps. Rather than using potting compounds or other techniques which are susceptible to severe environments, the end caps are secured to the filter material enrobed core by way of mechanical fasteners, such as blind pop-rivets, screws, or nails.Type: GrantFiled: February 7, 2003Date of Patent: April 12, 2005Assignee: Graver Technologies, Inc.Inventors: Rick J. Wells, F. Burke Allen
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Patent number: 6875342Abstract: A fluid filter includes a cylindrical pleated filter media disposed around a central perforated support core or self-supporting. An outer support sleeve comprising a extruded nylon, diamond-shaped mesh is stretched across the pleated media, and elastically conforms to the pleat peaks to structurally retain the pleats of the pleat peaks in fixed relation to one another. A bead of adhesive is then applied over the sleeve to fix the sleeve to the pleat peaks. End caps are disposed at opposite ends of the fluid filter.Type: GrantFiled: October 4, 2002Date of Patent: April 5, 2005Assignee: Parker-Hannifin CorporationInventor: Bruce E. Shane
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Patent number: 6824581Abstract: A panel filter element has a pleated filter media having peaks and valleys arranged in pleated sets of first and second panels. The pleated sets are adhered along side edges to form clean-side pockets which open adjacent to the valleys. The first and second panels have elongated embossments projecting both into and away from the pockets to keep the pockets open and to keep the pleated sets separate. Dirty air flows into the filter media both transverse to the peaks and laterally between the pleated sets of first and second panels. By having dirty air to be filtered flowing both transversly and laterally, the dirt holding capacity of the filter is increased while increases in restriction are minimized.Type: GrantFiled: May 1, 2002Date of Patent: November 30, 2004Assignee: Dana CorporationInventors: Jason LaMarr Tate, Edward Allen Covington, Roland Vann Lanier, Jr.
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Patent number: 6814243Abstract: A filter assembly with a replaceable filter element and a reusable filter housing, which incorporates a locking mechanism to ensure that the filter system will not be operated without a filter element installed.Type: GrantFiled: July 31, 2002Date of Patent: November 9, 2004Assignee: Caterpillar IncInventors: Aaron K. Amstutz, David C. Becktel, Jeffrey R. Ries, Kevin K. Socha
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Patent number: 6808628Abstract: A submerged membrane bioreactor includes a tank containing a mixed liquor having microorganism; and a filtration module immersed in the mixed liquor and having a permeate side in fluid communication with the mixed liquor only through the filtration module. The filtration module includes a porous support having a first surface forming the permeate side and a second surface opposing to the first surface; and a non-woven fabric membrane covering the second surface and having a thickness of 0.1-2 mm and a pore size of 0.2-100 &mgr;m.Type: GrantFiled: April 10, 2002Date of Patent: October 26, 2004Assignee: Industrial Technology Research InstituteInventors: Wang-Kuan Chang, Min-Chao Chang, Ren-Yang Horng, Hsin Shao
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Publication number: 20040124127Abstract: A filter cartridge for filtering impurities and the like from a swimming pool or other body of water is provided. The filter cartridge is positioned in a receptacle for receiving water and for recirculating it back to the pool. The filter cartridge includes a core communicating with the recirculating system and having a plurality of openings therein communicating with a supporting frame located around the core and affixed thereto. The frame has a multiplicity of openings therein and a plurality of undulations extending therealong. A flexible sleeve is located around the frame and is of sufficient size to assume the contour of the frame when water is supplied from the exterior of the sleeve to the interior of the core, thereby providing a maximum filtering surface. The sleeve has elastic bands around both ends for drawing the ends together around the core beyond the ends of the frame. The sleeve can be easily removed for cleaning or replacement.Type: ApplicationFiled: December 26, 2002Publication date: July 1, 2004Inventors: Diane N. Fox, Matthew A. Fox
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Patent number: 6712967Abstract: A filter element assembly has at least two cylindrically shaped and concentrically arranged filter media sleeves each connected at one end thereof to an inlet plate and each connected at the other end to a closed end terminal plate. Openings are provided in the inlet plate to permit entry of liquid to be filtered into the annular space between the filter sleeves. The closed end terminal plate prevents flow of unfiltered liquid from the annular space between the sleeves so as to force the liquid through the porous media of the sleeves to effect filtration. The inlet plate includes a central area that is recessed in relation to its outer edge to define an inlet chamber capped by a planar housing lid. The inlet chamber communicates with the inlet conduit via an opening in the central area.Type: GrantFiled: October 8, 2002Date of Patent: March 30, 2004Inventor: Moshe Gershenson
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Publication number: 20040026313Abstract: A multi-micron, multi-zoned woven metal wire mesh for the production of sand control screens. The multi-zone, dual micron layer is spirally wound on top of a perforated metal pipe. Second and third metal mesh filtration layers are spirally wound on top of the three-zone, dual micron layer, respectively. A perforated metal shroud is placed on top of the entire assembly to protect from the surrounding environment and acts as a protective cover.Type: ApplicationFiled: August 9, 2002Publication date: February 12, 2004Inventor: Todd Kenneth Arlon Fischer
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Patent number: 6585892Abstract: A concentric arrangement of bag-type filter sleeves 11, 12 of a filter insert are removably supported within a concentric arrangement of screens 60, 61 of an annularly-shaped basket 10a. The screens respectively support the filter sleeves against radial flow during filtration. A filter cartridge 37 is carried interiorly of the innermost filter sleeve and is configured to filter the liquid that has first been filtered in the filter insert and before the liquid can exit the filter vessel 30.Type: GrantFiled: October 8, 2002Date of Patent: July 1, 2003Inventor: Moshe Gershenson
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Patent number: 6585893Abstract: A filter insert includes a plurality of annularly-shaped, bag-type filter sleeves (111, 112, 113) concentrically-arranged. The ends of the sleeves are attached to the flanges of an inlet plate 114, an annular terminal plate 124 or a circular terminal plate 121 (e.g. by ultrasonic welding). The filter insert is removably placed within a basket such that concentrically-arranged screens (160, 161, 163) of the basket support respective filter sleeves against radial flow during filtration.Type: GrantFiled: October 8, 2002Date of Patent: July 1, 2003Inventor: Moshe Gershenson