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| Number | Title | Issue Date |
| 7790027 | Membrane plate for a filter press A membrane filter plate for a filter press includes a membrane fastened in the filter plate. The membrane has a flexible support layer, a central region with a functional layer different from the flexible support layer, and edge regions free of the functional layer.... | 09/07/2010 |
| 7326341 | Membrane filter press The invention relates to a membrane filter press. On operation of such a press a secure generation of the necessary pressing pressure can be guaranteed with a membrane filter press that has at least one membrane filter plate, a baseplate with thickened edge region, ... | 02/05/2008 |
| 7294278 | Method for oxygenating wastewater A method and apparatus creates gas-enriched fluid that is used to treat wastewater. In one embodiment, the wastewater is withdrawn from a supply of wastewater to be treated, and the wastewater is delivered in an atomized manner to a vessel pressurized with gas to fo... | 11/13/2007 |
| 7261817 | Filter module and device for static filtration of fluids with such a module The invention relates to a filter module and an apparatus for the static filtration of liquids using filter cells having deep bed filter layers and using spacer layers. According to the invention the filter module has a stack of n filter cells and n+1 spacer layers ... | 08/28/2007 |
| 7247245 | Filtration cartridge and process for filtering a slurry A depth filter design is disclosed which has little if any open void area upstream of the media. Preferably, it also has little if any open void area downstream of the media as well. A preferred embodiment uses layers of stacked, fibrous media with several of the la... | 07/24/2007 |
| 7201845 | System for inserting and removing frames of a fluid transfer system A system for moving a filter or a retainer into or out of a fluid pathway without halting the movement of the fluid in the pathway. When acting as a filtering device, the system includes a filter frame and a drive mechanism for slidingly moving the filter frame on s... | 04/10/2007 |
| 7156993 | Membrane, membrane plate and chamber plate for a filter press In order to provide a filter press which operates especially reliably and free of wear, a membrane for a membrane plate has a membrane surface enclosed by a membrane margin which is free of perforations. Furthermore, a membrane plate has such a membrane. Moreover, a... | 01/02/2007 |
| 7153425 | Process and filter for filtering a slurry The present invention comprises a process for filtering a slurry and a filter cartridge construction for filtering a slurry having a filtration medium formed of a depth filter such as a cylindrical seamless fibrous depth filter comprising a nonwoven fibrous mass, wo... | 12/26/2006 |
| 7105089 | Liquid—liquid extraction system and method A liquid-liquid extraction system including an outer chamber and an inner chamber. The outer chamber is adapted to contain one of a feed solution and a liquid extractant and defines a containment region. The inner chamber is adapted to contain the other of the feed ... | 09/12/2006 |
| 7094346 | Cross-flow filtration cassettes and methods for fabrication of same This invention relates generally to filtration cassettes, and, more particularly to methods of fabricating cross-flow filtration cassettes. Cassettes of the invention are characterized, in part, by an internal porting (e.g., manifolding) feature which eliminates the... | 08/22/2006 |
| 7087162 | Accessible well for brine tank A well (12) outside of a brine tank (10) is provided which provides better accessibility to the brine refill valve (112) or other components within the well. Also, apertures (42–48) of differing elevations above the bottom of the brine ... | 08/08/2006 |
| 7008535 | Apparatus for oxygenating wastewater A method and apparatus creates gas-enriched fluid that is used to treat wastewater. In one embodiment, the wastewater is withdrawn from a supply of wastewater to be treated, and the wastewater is delivered in an atomized manner to a vessel pressurized with gas to fo... | 03/07/2006 |
| 6929743 | Device and assembly for cross-flow filtration The invention relates to a device and an assembly for cross-flow filtration comprising filter cassettes. Said filter cassettes are cost-effective to produce as they have few connections and simple clamping plates and are characterized by a long service life and by b... | 08/16/2005 |
| 6827851 | Filter module The invention relates to a filter module (4) with a simplified design which allows for the manufacturing of a step filter, Each ply of filter medium is composed of a deep-bed filter material layer (1, 1a-d) and the packing is composed of drainin... | 12/07/2004 |
| 6387282 | Method of drying a filter cake and a press for carrying out the method The filter cake in a filter press is heated by direct contact with a heating plate opposite the pressing membrane so that a vapor phase is generated which moves uniformly in a planar pressure front through the filter cake to dry residual liquid therefrom.... | 05/14/2002 |
| 6383395 | Water treatment method and apparatus A media is used to remove species from aqueous solutions, particularly in the treatment of water to enable it to be suitable for drinking. The media includes a material selected from the group consisting of zirconium hydroxide, titanium hydroxide, hafnium... | 05/07/2002 |
| 6343697 | Filter device with filter disks A filter device, particularly for filtering melt-type fluids, such as polymer melts, includes at least one filter disk having two filter disk halves connected to each other by their edges and provided with filter material on their exterior surfaces. The f... | 02/05/2002 |
| 6190552 | Salt platform A grid (250, 280) is disclosed which can be used as part of a salt platform (10, 50, 80) to support salt in an ion exchange water softener. The grid is preferably formed of ABS plastic and has a border portion (252) and bands (254, 256) without holes (274... | 02/20/2001 |
| 6132608 | Optimized wax for sealing the edge of a filter sheet A filter sheet positioned between plates (14) of a filter press has a fluid-impermeable wax layer (11) sealing the sheet's perimeter. The wax preferably comprises ethylene bis stearamide and has a durometer reading of about 75 to about 100 Shore A hardnes... | 10/17/2000 |
| 5938920 | Filter plate assembly for horizontal-type filter press A self supporting filter plate assembly having two opposed screen sections with inwardly shaped deformations which engage each other to maintain a planar surface of the screen sections at a predetermined spacing. The screen sections releasably engage each... | 08/17/1999 |
| 5772831 | Filter membrane element and method of manufacturing same A filter membrane element for a membrane separation unit for use in a water treatment apparatus or the like, and a method of manufacturing the same. An organic filter membrane including a plate-like support member made of nonwoven fabric and a film coatin... | 06/30/1998 |
| 5770063 | Plate-retaining assembly for filter press A filter-plate assembly has a support plate having an outwardly directed face and formed with an annular groove opening outward at the face and a chamber plate confronting the face of the support plate, forming therewith an inlet compartment, and formed w... | 06/23/1998 |
| 5762786 | Plate filter press A plate filter press with chamber plates and diaphragm carrier plates and diaphragms secured thereto is provided that makes it possible to provide an adequately large, radial slurry admission cross-section that remains free of blockage. An annular support... | 06/09/1998 |
| 5601709 | Plate assembly for filter press A filter-plate assembly has a backing wall having an outwardly directed face and formed with an annular groove opening outward at the face and of a predetermined transverse width and a filter plate adjacent the wall and having an outer peripheral frame se... | 02/11/1997 |
| 5437796 | Plate module and its use for separting fluid mixtures A plate module and its use for separating fluid mixtures according to the methods of pervaporation and vapor permeation is comprised of a feed plate, a cover plate, a gasket, and a membrane to define at least one feed compartment and one permeate compartm... | 08/01/1995 |
| 5366627 | Enclosed thorough wash filter press A thorough wash operation of a process fluid is conducted within the confines of an enclosed housing. The housing includes four ports at one side of the housing for transmission of process fluids through a plurality of press frames so as to (1) separate s... | 11/22/1994 |
| 5362387 | Beer filtering device A beer filtering device of a filter press type for filtering a beer stock. The beer filter device includes a plurality of filter plates (4) and a plurality of filter frames (6) arranged side by side in alternate relationship to each other. A filter elemen... | 11/08/1994 |
| 5342517 | Filtration cassette article, and filter comprising same A filtration cassette, of a type comprising membrane filter sheets arranged in a peripherally bonded array of multilaminate character wherein the filter sheets alternate with foraminous (e.g., screen or mesh) sheet elements, and a cross-flow filter compri... | 08/30/1994 |
| 5240605 | Spiral filter A spiral filtering device disposed within a frame consisting of two draw bars and two end pieces. The spiral filter consists of at least one spiral plate and at least two support plates with attached filter plates inserted between two end plates. On each ... | 08/31/1993 |
| 5232589 | Filter element and support A filter plate having a flow channel area on its main top surface, and liquid distribution and collection basins, each of polygonal shape, on its main bottom surface. Liquid inlet and discharge trough openings extend through the plate adjacent the respect... | 08/03/1993 |
| 5198123 | Plate filter press A plate filter press for the mechanical separation of solids from a liquid forming a suspension. The plate filter press is made of a plurality of vertical membrane plates and filter plates, the membrane plates and filter plates alternating. The space betw... | 03/30/1993 |
| 5112502 | Homogeneous substitution method and apparatus for cake using filter press In homogeneous substitution washing method and apparatus for a cake using a filter press which comprises pairs of opposed squeezed and squeezing filtering plate units, pairs of opposed squeezed and squeezing filtering cloths, each pair of filtering cloths... | 05/12/1992 |
| 5100548 | Membrane plate for filter presses A membrane plate for filter presses including a supporting plate with a clamping rim elevated on both sides, a frame, and a membrane clamped in place between the supporting plate and the frame. The membrane is enclosed inwardly of the clamping rim between... | 03/31/1992 |
| 5094760 | Liquid filter apparatus and method A pressurized liquid filter in which a series of spaced apart, vertically extending filter plates are mounted between the sides of housing, inflatable hose seals extending across each top entrance and bottom exit. Filter media strips are draped vertically... | 03/10/1992 |
| 5051179 | Membrane filter plate for filter presses A membrane filter plate for filter presses includes either a membrane holding frame or plate having dovetailed recesses; at least one membrane having an associated covering frame; each membrane and covering frame combination having an associated filter cl... | 09/24/1991 |
| 5021155 | Membrane filter plate A filter plate arrangement for a filter press which includes a carrier plate, at least one membrane arranged on the side of the carrier plate having spacing ribs for positioning a filter cloth, a sealing edge frame for securing the membrane to the carrier... | 06/04/1991 |
| 5019255 | Device for separation of a liquid medium containing constituents which are separable in a filter A device for separation of constituents, separable in a filter, from a liquid medium, comprising a stack of a plurality of plate units (10), arranged one after the other, with filters (11) arranged therein. Along the filters there are arranged rotors (24)... | 05/28/1991 |
| 5006215 | Squeezer apparatus An apparatus for uniformly pressing a plurality of flat plate-type structures together comprising a first and second vertical support means, a pair of side rails spaced apart and supported on the support means, the side rails being perpendicular to the su... | 04/09/1991 |
| 4997560 | Plate for a filter press A filter press has at least one support wall and at least one filter element adjacent the wall and in turn having an outer peripheral frame secured to the wall, a generally planar central panel within the frame and having a back face turned toward and for... | 03/05/1991 |
| 4948501 | Membrane filter plate Membrane filter plate for a filter press or the like, with a carrier plate, at least one membrane arranged on one side of the carrier plate and preferably provided with spacing cams or the like for applying a filter cloth or the like and a sealing edge su... | 08/14/1990 |
