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Class 210/493.4 - Spirally formed


Subclass of Class 210 - Liquid purification or separation
Definition: Apparatus having a helically shaped filter medium.
No. of patents: 83
Last issue date: 07/08/2008


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NumberTitleIssue Date
7396463Spiral wound membrane element and a process for preventing telescoping of the filter element
A process for ultrafiltration using a spiral wound membrane filter is disclosed where the pressure in the space between the filter element and the pressure vessel is higher than or equal to the pressure inside the filter element. Using these conditions the static fo...
07/08/2008
7387731Filtration element and method of constructing a filtration assembly
A coupler for a spiral membrane filtration element having a spiral membrane enclosed within a rigid outerwrap includes a center support, a plurality of spokes extending outwardly from the center support, a circular rim coupled with the spokes, with the face of the r...
06/17/2008
7329326Method of making a fluted filter media for air filter
Fluted filter media includes filter material having a plurality of flutes formed therein having alternating ends of adjacent flutes closed to force fluid through filter material. A first embodiment of the filter media includes tapered flutes which have the open ends...
02/12/2008
7323105High capacity direct flow filter with maintained channel width
A direct flow filter includes a pleated filter element filtering fluid flowing axially therethrough parallel to the wall segment pleat tip bend lines. Embossments on the wall segments have a height extending along a lateral direction into a respective flow channel t...
01/29/2008
7311831Filtration membrane and method of making same
A filtration membrane and method of making the same wherein the filtration membrane comprises obstructions and/or spacers. ...
12/25/2007
7264725Hollow fiber membrane contactor and method of making same
The instant invention is a hollow fiber membrane contactor, and method of making same. The hollow fiber membrane contactor includes (1) a shell, said shell having a internal bonding surface, an interlocking geometry ring being provided on said internal bonding surfa...
09/04/2007
7208084Modular aquarium filter
A modular aquarium filter includes one or more cartridges connected in series. The cartridges may contain filter media for chemical, biological and/or mechanical filtration. In addition, the cartridges are designed such that they provide a unique internal helical ge...
04/24/2007
7125490Porous filter
A filter has a longitudinal axis with an inner diameter defined by a hollow longitudinally extending center. The filter has fingers extend radially outwardly arcuately from the longitudinal axis. The fingers have base ends near the longitudinal axis and outer edges ...
10/24/2006
7063789Filtration element and method of constructing a filtration assembly
A coupler for a spiral membrane filtration element having a spiral membrane enclosed within a rigid outerwrap includes a center support, a plurality of spokes extending outwardly from the center support, a circular rim coupled with the spokes, with the face of the r...
06/20/2006
7052532High temperature nanofilter, system and method
A filter, system and method is provided for filtering nanoparticles in a hot gas, namely particles about 200° C. and further particularly >about 450° C. including diesel exhaust. The filter includes filter media material composed of fibro...
05/30/2006
7048855Cross flow filtration materials and cartridges
Cross flow filtration cartridges are made using semipermeable membrane of sheet formation that was cast upon an integral polymeric fibrous support material which exhibits excellent permeate flow in the plane thereof and serves as both backing material and permeate c...
05/23/2006
7033110Drainage support matrix
A non-biodegradable, unitary drainage device of flexible character. The invention features a monolithic, skeletal construct consisting of stacked, planar or poly-formational arrays of quasi-tubular, tube or rod supports, termed “stand-off” elements. Actual posit...
04/25/2006
7033497Filter cartridge
A filter cartridge formed by winding, in a twill construction, a band-shaped unwoven cloth, which contains thermoplastic fibers and at least a part of its fiber intersections are stuck thereon, so that a cylindrical shape can be obtained, wherein 1. two types of fil...
04/25/2006
7014050Filter cartridge
A filter cartridge comprising a strip, long fiber non-woven fabric which comprises a thermoplastic fiber and in which at least a part of fiber intersections is adhered, which is wound around a perforated cylinder in a twill form, has made it possible to obtain a cyl...
03/21/2006
7008467Air cleaner and method of filtering
A filter element, a safety element and fluid cleaner assembly. The fluid cleaner assembly generally includes a housing having a cover and a primary fluid cleaner section. The element generally includes a z-filter media, arranged in a straight through configuration, ...
03/07/2006
6989097Feed spacers for filtration membrane modules
The invention disclosed relates to feed spacers used in various filtration membrane modules, such as in spiral wound membranes, used in cross-flow filtration. Such spacers have an influence in promoting the mixing between the bulk of the fluid and the fluid element ...
01/24/2006
6966940Air filter cartridge
A filter element, a safety element and fluid cleaner assembly. The fluid cleaner assembly generally includes a housing having a cover and a primary fluid cleaner section. The element generally includes z-filter media, arranged in a straight through configuration, an...
11/22/2005
6953124Filter element with end face inlets and discharge outlets
A filter element for end face inlet formed of triangular channels which are alternately closed such that the fluid to be filtered must pass through the filter material in order to flow from the inlet side (22) to the discharge side (23). The channels a...
10/11/2005
6946012Filter and forming system
A filter includes first and second sheets of filter media, the second sheet being pleated and forming with the first sheet a plurality of axially extending flow channels having lateral cross-sectional shapes with two adjacent included angles each greater than 45° a...
09/20/2005
6887343Filter coating, winding, finishing and manufacturing system
A coating system (66, 68), winding system (158), finishing system (274, 276) and manufacturing system (FIGS. 6, 7, 22-29) is provided for spiral-wound fluted filter media (74, 130). ...
05/03/2005
6858141Process for the preparation of ultrafiltration membranes of polyacrylonitrile, using malic acid as an additive
The present Application relates to a process for the preparation of ultrafiltration membranes from polyacrylonitrile using malic acid as additives, with said membrane of molecular weight ranging between 80 to 180K, showing high purification and water permeating abil...
02/22/2005
6797167Composite filter medium and fluid filters containing same
A composite filter medium for removing at least 99.95 percent of particulates of a size in the 3 to 4 micron range and dissolved chemical contaminants from a fluid and filters of various configurations employing the composite filter medium are disclosed. The composi...
09/28/2004
6673242Open-channeled spiral-wound membrane module
There is disclosed a spiral-wound membrane module design for various membrane filtration techniques having significantly reduced fluid flow resistance in the feed stream path. Specifically, the inventive spiral-wound membrane module is designed having a c...
01/06/2004
6656362Spiral reverse osmosis membrane element, reverse osmosis membrane module using it, device and method for reverse osmosis separation incorporating the module
A spiral reverse osmosis membrane element of the present invention includes a plurality of bag-shaped reverse osmosis membranes, permeated liquid passage members arranged inside the reverse osmosis membranes, and a plurality of feed liquid passage members...
12/02/2003
6632357Reverse osmosis ("RO") membrane system incorporating function of flow channel spacer
A permeable membrane system (10) for the separation of fluid components includes a laminated composition (12) having two sheets (14 and 16) formed from a polymer and positioned adjacent one another to form a fluid passage (18) therebetween. The outside su...
10/14/2003
6598749Spiral pleated filter cartridges
A filter is disclosed that includes a cylindrical filter element having a longitudinal axis, an outer periphery, an inner periphery, and a plurality of longitudinal pleats arranged in a spiral configuration in close proximity to one another. Each of the p...
07/29/2003
6565747Spiral wound type separation membrane element
A spiral wound type separation membrane element includes a spiral wound type membrane component formed by superposing separation membranes of membrane materials supported on nonwoven fabric members on both surfaces of a permeated liquid passage forming me...
05/20/2003
6454942Liquid separation membrane module
A liquid separation membrane module includes a semipermeable membrane receiving a pressure of a feed liquid, and a channel material arranged so as to support the back side of the semipermeable membrane. The channel material is a tricot knitted fabric knit...
09/24/2002
6413424Sanitary style filter element
A new sanitary filter element is described which provides a structure which cannot harbor contaminants and is readily and thoroughly cleaned as needed. The new device utilizes a uniquely configured adhesive component and membrane and tricot channel sheets...
07/02/2002
6375842Water desalination
A desalination plant is disclosed which includes a pump for pumping water at a pressure of between 50 and 65 Bar to a generally cylindrical filter element which includes a plurality of reverse osmosis membranes defining salt passages. Immediately upstream...
04/23/2002
6352641Wound pocket module
An improvement to a spiral wound filtration membrane is the provision of a fluid-permeable protective sheath around the inner spacer of the membrane pocket....
03/05/2002
6277282Reverse osmosis element utilizing a fabric composed of substantially oriented fibers
A reverse osmosis membrane element is provided that can treat a raw liquid throughout a wide raw liquid pressure range from a low pressure to a high pressure, comprising a reverse osmosis membrane, a permeated liquid passage conduit provided on one surfac...
08/21/2001
6238561Corrugated axial filter with simple fold pattern and method of making it
A corrugated axial filter (148) has a plurality of flow channels (178, 180, 182, 184, 208, 212) extending axially from the upstream dirty frontside (146) of the filter to the downstream clean backside (160) of the filter. Each channel has an upstream open...
05/29/2001
6235195Filter element incorporating a handle member
A filter arrangement includes a filter element configured for straight through flow and a handle member secured to the filter element. The filter element may typically have a plurality of flutes where selected ones of the flutes are open at upstream porti...
05/22/2001
6224767Fluid separation element assembly
A fluid separation element assembly comprises a fluid separation element having a membrane unit and a wrapping material formed around the membrane unit, an anti-telescoping plate attached to at least one end of the fluid separation element at a condition ...
05/01/2001
6153098Spiral wound filter with central barrier
The present invention comprises a fluid filter element which has a hollow perforate cylindrical supporting core. A relatively fine filter media of substantial cross section is spirally wound about the supporting core with adjacent layers spaced from each ...
11/28/2000
6142312Membrane separation device with membrane module and washing apparatus therefor
A membrane separation device includes a washing apparatus and a membrane module. The washing apparatus is formed of a vessel for accommodating the membrane module therein, a first tank and a second tank for accommodating washing liquid for washing the mem...
11/07/2000
6048298Apparatus for forming spiral pleated filter cartridges
A method is disclosed for forming a filter cartridge which includes the steps of providing a cylindrical filter element having a plurality of radially extending longitudinal pleats, engaging an outer periphery of the cylindrical filter element along a sub...
04/11/2000
6000558Filter cartridge construction and process for filtering particle-containing paint composition
A filter element for filtering a particle-containing paint composition or a particle loading slurry composition which is a precursor to a particle-containing paint composition is provided. The filtration element comprises at least one filtration layer for...
12/14/1999
5985146Sanitary rigid shell spiral wound element
A novel rigid, nonporous shell for use with a spiral wound membrane filtration element that allows a controlled bypass flow between the outside of the element and the inside of an enclosing pressure housing while maintaining structural mechanical properti...
11/16/1999
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