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| Number | Title | Issue Date |
| 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 In one embodiment, the wastewater is withdrawn from a supply of wastewater to be treated, and the wastewater is delivered in an atomized manner to a vessel pressurized with gas to fo...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 |
| 7255759 | Patterning on SMS product A method and apparatus for the production of nonwovens. The nonwovens including a spunbonding apparatus for forming a first web of nonwoven material on a first belt, and a meltblowing apparatus for forming a second web of nonwoven material on a second belt. The seco... | 08/14/2007 |
| 7176034 | Apparatus and method for filtering biological samples There is provided an apparatus and method for collection and filtration of a sample having a sample holder, a filtrate holder and a connection conduit having a sample receiving end and a filtrate receiving end and containing a filter. The sample holder has an entry ... | 02/13/2007 |
| 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 |
| 7128832 | Filter pit A filter pit is disclosed. The pit has an inlet and an outlet adjacent a base of the pit. A primary, a secondary and a tertiary filter are located between the inlet and outlet and the tertiary filter is supported above the base and is able to dry out when the flow o... | 10/31/2006 |
| 7128771 | Air filter retaining system A filter retaining system formed from multiple filter retaining frames is disclosed. Each of the frames is formed from either a female type extrusion or a combination of male and female type extrusions. Specifically, each frame has either a tongue or a groove which ... | 10/31/2006 |
| 7122119 | Sieve separator A sieve separator and a method of slurry separation that uses two or more levels of filtration screens. In some embodiments, the filtration screens on different levels may be used to separate solids of various sizes at each level. ... | 10/17/2006 |
| 7029584 | Rotating filter A device for filtering liquids comprising two shafts which are parallel to each other or at an acute angle wherein each shaft carries a stack of disks that extend perpendicularly to the shaft axis and are rotated thereby. The disks of one stack are engaged in the in... | 04/18/2006 |
| 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 |
| 6969462 | Pipe mounting apparatus for water filter A pipe mounting apparatus for a water filter includes a first half body with a top, a first pipe assembly, a second half body with a top, a second pipe assembly and a mounting bracket. The first pipe assembly is formed on the top of the first half body and has a pum... | 11/29/2005 |
| 6846412 | Combination filter assembly A combination filter assembly having a plurality of filter sieves positioned in parallel one after the other in the direction of flow. The filter sieves are stretched and mounted in housing elements to form filter elements. The housing elements are in contact with e... | 01/25/2005 |
| 6793813 | Sealed filtration system A sealed filtration system includes a housing, having two chambers, that can be submerged. One chamber houses a plurality of subchambers in which various filter media are located, and the other chamber houses a submersible pump or additional filer media. A drain cha... | 09/21/2004 |
| 6605217 | Apparatus for high pressure fluid filtration A bacterial fluid filter includes a filter element supported by a backing member. The filter element and backing member are sealed, e.g., with one or more o-ring seals, in a housing to provide a filter assembly capable of filtering fluid under relatively ... | 08/12/2003 |
| 6346192 | Apparatus for high pressure fluid filtration A bacterial fluid filter includes a filter element supported by a backing member. The filter element and backing member are sealed, e.g., with one or more o-ring seals, in a housing to provide a filter assembly capable of filtering fluid under relatively ... | 02/12/2002 |
| 6331246 | Waste filter and manifold system A filter system especially useful in the treatment of waste material, in particular liquid waste material which may include particulate matter therein. The filter system includes a series of filters of progressively finer porosity in order to selectively ... | 12/18/2001 |
| 6001249 | Multi-stage water filter system A water filter system having a housing for a plurality of serial-flow connected filter cartridges with distinct filtering characteristic related to the direction of flow of water being filtered. Each filter cartridge has a membrane wrapped activated carbo... | 12/14/1999 |
| 5833850 | Water filter A water filter includes a housing, a base adapted to engage with a lower end of the housing, two filtering cores each having a cylindrical casing threadedly connected with an upper circular cover and a lower circular cover, the lower circular cover having... | 11/10/1998 |
| 5607585 | Apparatus for filtering plastic melts An apparatus for filtering plastic melts, which comprises a filter housing (1) having at least one cylindrical filter receiving chamber (8), and with a tubular filter cartridge (2) mounted in the chamber. An annular melt flow space (9) for the plastic mel... | 03/04/1997 |
| 5565097 | Micro-screen filter device A micro-screen filter device for a dry cleaning fluid flow system in a dry cleaning machine, having a cage to receive garments to be cleaned, a main filter with a plurality of filter elements and optional carbon cores, a main filter outlet valve, a main f... | 10/15/1996 |
| 5298159 | Filter-collector apparatus A filter-collector apparatus comprising a closed vessel having in inlet for introducing pneumatically conveyed material thereinto and an outlet for discharging material therefrom, a detachable tube sheet disposed in the vessel and cooperating with the ves... | 03/29/1994 |
| 5284580 | Refuse collecting frame for sewer A refuse collecting frame for a drainage sewer, particularly a frame placed beneath a cover of a sewer drainage opening to accumulate refuse and permit easy disposal of refuse accumulated therein in order to prevent blockage of the sewer. The refuse colle... | 02/08/1994 |
| 5269912 | Precious metal recovery system A recovery system for precious metal particles in wash solutions includes a pair of filter elements and a pump mounted within a closed tank. The first filter is of relatively large pore size, and traps layer particles. The prefiltered liquid is collected ... | 12/14/1993 |
| 5034127 | Filter assembly for purifying brine The brine purifying system employs a multistage filtering apparatus comprising a plurality of the same filter units piled up one over another to form a plurality of cascaded filtering stages. When the filter layers of the filter units are clogged with uns... | 07/23/1991 |
| 5032293 | Basket filter assembly with inclined nozzle A filter assembly for filtering a wide size range of impurities from a fluid. The filter assembly comprises a basket having a porous surface of a first average pore size defining an interior space for collecting impurities filtered from a fluid and a filt... | 07/16/1991 |
| 5000922 | Sample filtration, separation and dispensing device An apparatus for dispensing a predetermined amount of a sample into a fluid. The apparatus comprises a chamber which may be inserted into a cuvette. The chamber comprises a membrane or filter ball for dispensing a predetermined amount of a sample into a f... | 03/19/1991 |
| 4966697 | Fluid filter retaining device A fluid filtering device includes a housing having an interior chamber with an open top and an inlet and outlet open to the chamber. An annular seat is secured to the housing within the chamber in a position spaced downwardly from the open top so that the... | 10/30/1990 |
| 4876007 | Plate-type filter cartridge with internal support A plate-type filter cartridge includes a plurality of stacked filtration units; each filtration unit having inner and outer rims, two filtration membranes bonded to opposite sides of the two rims, and a pair of netty members formed of fibrous material con... | 10/24/1989 |
| 4863696 | Apparatus for the percutaneous absorption of fluids An orifice assembly for use in connection with diffusion cells for the percutaneous absorption of fluids which is composed of a pair of resiliant and mating members having structure for securely retaining a flexible membrane therebetween in a predetermine... | 09/05/1989 |
| 4732676 | Filter device containing series-connected fibrous tube elements A liquid filter device has a housing and a multiple of closely spaced discs provided in the housing, the discs having holes which are adapted to be in alignment so as to define at least one elongated passage. The discs have separating means separating the... | 03/22/1988 |
| 4717472 | Oil filter assembly having multiple removable filter members and cooling fins A multi stage oil filter assembly is disclosed characterized by a housing including base and cover members and at least one intermediate member arranged between the base and cover members. A first planar filter member is arranged between the cover and int... | 01/05/1988 |
| 4689145 | Dry well filtration system A filtration system is provided for a dry well in the form of a buffer tank made of concrete to remove sediment and pollutants from water supplied from a header to an inlet pipe in the tank, so that the water exiting from an outlet pipe is free of particu... | 08/25/1987 |
| 4673499 | Water separator and filter for liquid hydrogens A filter and water separator for use with liquid hydrocarbons such as aircraft fuel includes a horizontally directed housing and within the housing a first set of filtering and coalescing elements connected to the inlet port of the housing and a parallel ... | 06/16/1987 |
| 4664798 | Apparatus and method for filtering a fluid Apparatus and method for filtering contaminated fluids at various locations using at least a first and second filter unit mounted on a mobile base. Each filter unit has a plurality of filter vessels with each of the filter vessels having a plurality of fi... | 05/12/1987 |
| 4647377 | Filter apparatus A filter apparatus has a filter housing having suspended therein a filter element. The filter element includes a plurality of hollow threads made from a high molecular weight polymeric material. The threads are characterized by being porous and flexible a... | 03/03/1987 |
| 4579656 | Leaf-type filter A leaf-type filter system in which a suction pump is employed to pump filtered fluid from a series of individual filter leaves is connected to the individual leaf chambers via fluid couplings located above the surface of fluid being filtered. The coupling... | 04/01/1986 |
| 4544483 | Dynamic, reverse-flow oil purifier device A low-cost, mass-produced oil purifier of plastic, utilizing reverse internal currents to remove impurities, has a sealed housing with upper and lower parts that interfit. The lower housing part has a circular base and a central, upright standpipe open at... | 10/01/1985 |
| 4461707 | Ultrafiltration and reverse osmosis tubular membrane module An ultrafiltration and reverse osmosis module comprising a tubular casing having a plurality of tubular membrane assemblies spaced therein by spacing plates, in stepped end portions of the casing bore, and held therein by sealing plates clamped to flanges... | 07/24/1984 |
| 4368119 | Apparatus for continuous treatment of mixtures The invention relates to an apparatus for treatment of particulate mixtures such as a mixture of solid particles, which is to be depleted in, enriched by or treated with a fluid, or wherein the mixture acts as a treatment medium for a fluid passing throug... | 01/11/1983 |
| 4259097 | Filtering means for arc suppressing gas system Arc suppressing gas in a high voltage circuit breaker system is collected, filtered and compressed. The compressed gas is passed through a series of oil and desiccant filters and returned to a high pressure vessel for storage. The oil and desiccant filter... | 03/31/1981 |
| 4055498 | Selective filtration apparatus Filtration apparatus that is very versatile is disclosed. The apparatus includes a porous filter disc that can be readily interchanged with other filter discs having the same or different porosity. In addition, a membrane filter can be used in conjunction... | 10/25/1977 |
