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| Number | Title | Issue Date |
| 8137541 | Sewage effluent distribution means A septic system can include an improved and more reliable apparatus for distributing effluent uniformly to a plurality of portions or fingers of a drain field. In such apparatus, an effluent container, or collection tank, is connected with the outlet of a septic tan... | 03/20/2012 |
| 8002974 | Passive stormwater management system A stormwater inlet near an upper edge of a layered filter media vessel is equipped with a distribution header that ensures effective use of the surface area of the filter media by providing plural spaced streams of stormwater thereat, each at a point of impact havin... | 08/23/2011 |
| 7601256 | Reverse osmosis filtration systems Reverse osmosis filtration systems that are self contained and easily converted from above the counter use to below the counter use. The systems feature a simple construction, including a two piece manifold assembly to which filters, including a reverse osmosis filt... | 10/13/2009 |
| 7303666 | Water filtration system A water filtration system includes a filter for receiving water to be filtered and having an output. A water storage vessel is connected to receive water from the filter output; and water is removed from the storage vessel and supplied back to the input of the filte... | 12/04/2007 |
| 7267235 | Greywater recycling apparatus The invention provides a unitary device for converting an open-top container into a greywater recycling apparatus comprising a vessel lid having a submersible float switch-operated pump depending therefrom by extension means sized to enable the positioning of the pu... | 09/11/2007 |
| 7094339 | Liquid-treating method In the method, an adapter is substituted for the filter-enclosing cap of a conventional in-line strainer device to permit introduction into a plumbing system of a flushing solution withdrawn from an independent supply. The method is typically used for introducing an... | 08/22/2006 |
| 7044165 | Outflow regulator for a gravity-fed liquid outlet An outflow regulator for a gravity-fed liquid outlet of a liquid reservoir comprising a restriction plate mountable within the liquid outlet for limiting a flow rate of an effluent. The restriction plate allows a lower passage for the effluent when a first level of ... | 05/16/2006 |
| 6932900 | Filter device A filter device includes a filter housing (10) in which at least two filter elements (12, 14) with differing filter grades of filter material (16) are arranged. The filter elements are partially separated from each other by a separating device (... | 08/23/2005 |
| 6797158 | Method and apparatus for acoustically driven media filtration A method and apparatus for acoustically enhanced particle separation uses a chamber through which flows a fluid containing particles to be separated. A porous medium is disposed within the chamber. A transducer mounted on one wall of the chamber is powered to impose... | 09/28/2004 |
| 6790367 | Method and apparatus for separating and measuring solids from multi-phase well fluids A method and an apparatus for separating and measuring solids from multi-phase well fluids. The apparatus comprises a separator; an upper solids level and a lower solids level sensor, both connected to the separator; a dump valve operatively connected to the separat... | 09/14/2004 |
| 6638420 | Apparatus for sewage treatment Apparatus for treatment of sewage on vessels. The apparatus includes at least a first aeration chamber, a settling chamber, a disinfection chamber, and a storage container. In order to provide a multifunctional and efficient apparatus, the aeration chambe... | 10/28/2003 |
| 6217755 | In-tank fluid filter with valve assembly The filter head and filter housing define a liquid flow inlet path, a first liquid flow outlet path, and a second liquid flow outlet path. A filter media construction is positioned within the housing. The filter media construction, in combination with the... | 04/17/2001 |
| 6187180 | Apparatus for screening The apparatus for removing bodies (41) from a liquid in which the apparatus includes a first container (1) which is provided with an inlet (13) through which the liquid is supplied to the first container, and a second container (2) which, in the lower reg... | 02/13/2001 |
| 6139727 | Self-cleaning water filter A self-cleaning filter is provided for filtering particulate from a fluid flow stream such as water used in an irrigation system or the like, wherein a segmented filter element is backwashed or flushed clean in response to cyclic on-off supply of fluid. T... | 10/31/2000 |
| 5989413 | Fuel filter with an integrated pressure regulating valve A fuel filter with a pressure regulating valve for fuel circulated from a fuel tank and injected into an internal combustion engine. The fuel filter comprises a filter pot closed by a cover and an annular filter element for radially filtering flow from th... | 11/23/1999 |
| 5914048 | Adjustable control valve system for rotating disc filter and method of operating the system A control system for the vacuum cut-off valve of a rotating disc or drum filter is provided. The control system includes an actuator that is connected to the vacuum cut-off valve for adjusting the rotation of the vacuum cut-off valve with respect to the c... | 06/22/1999 |
| 5580444 | Water quality monitor for a water purification system An improved water quality monitor is provided for use in a water purification system of the type having a reverse osmosis unit for producing relatively pure water from a tap water supply. The reverse osmosis unit supplies produced purified water to a rese... | 12/03/1996 |
| 5565095 | Filter apparatus Filter apparatus for filtering liquids comprising a hollow filter body (12) mounted in a housing (18) having an inlet port (22) for supplying liquid to be filtered to the interior of the housing. An outlet port (24) for filtered liquid communicates with t... | 10/15/1996 |
| 5389244 | Pressure and vacuum filtration and washing device A pressure and vacuum filtration and washing device adapted for the processing and handling of hazardous materials without releasing hazardous chemical vapors includes a microporous filter medium which is contained within a pressurized filter vessel. A pu... | 02/14/1995 |
| 5354466 | Filtration system with improved backwashing capability A filtration system is disclosed which operates with a single supply pump to achieve backwashing in an expeditious manner. The system includes a fluid supply source for a feed fluid to be filtered, a feed pump in fluid communication with the source and a ... | 10/11/1994 |
| 5256279 | Liquid storage system with unpressurized reservoir engagable with level sensors A liquid storage system comprising a flexible, closed and freely expandable reservoir for storing liquid medium-containing material. A supply conduit conducts liquid, for example, from a reverse osmosis module, to the reservoir to expand the reservoir. A ... | 10/26/1993 |
| 5096598 | Pressurized purging of a liquid drain for a vacuum system The present invention is directed to an improved purging of a liquid drain system for a liquid separator used in a moisture laden process vacuum system wherein the liquid separated from the flow stream by the separator is collected in an accumulator which... | 03/17/1992 |
| 5082557 | Control head for water purifier A water purifier includes a canister containing a reverse osmosis filter unit and threadedly engaged with a control head which is adapted to be coupled to a source of tap water, to a purified water storage tank, to a faucet or other remote usage location ... | 01/21/1992 |
| 5071567 | Installation and process for filtration of a machining liquid in a continuous supply circuit An apparatus and method for continuously supplying and recycling machining liquid in an EDM device employ a filter between a liquid reservoir and a machining location at which the liquid is used. In one embodiment of the invention a buffer reservoir is pr... | 12/10/1991 |
| 5053120 | Arrangement for draining water collecting in the container of a water separator of an internal-combustion engine The invention relates to an arrangement for the automatic removal of water collecting in a fuel filter having a water separator. The evacuation takes place by means of a piston acted upon by a pressure medium, preferably a fuel pressurized by the pressure... | 10/01/1991 |
| 4859319 | Device for measuring the quantity of ultrafiltrate eliminated during a dialysis treatment A device for measuring the quantity of ultrafiltrate eliminated during a dialysis treatment. The device comprises two vessels of a known capacity wherein the ultrafiltrate coming from a pump is alternately received and then discharged by means of valves. ... | 08/22/1989 |
| 4801375 | Water vending system The invention is related to water vending systems for the automatic dispensing of purified water from a machine which is preferably activated by coin or other form of payment. Reverse osmosis filtration of local water together with other water treatment o... | 01/31/1989 |
| 4795112 | Method and device for emergency transportation In the event of an earthquake or fire, important objects like a recording medium used in a location where important information to the outside are relayed or in a location where natural phenomena are observed, are carried away, hanging from an airborne ba... | 01/03/1989 |
| 4663033 | Reactivateable adsorption filter assembly A reactivateable adsorption filter assembly comprises an adsorption filter element, a storage vessel in which is stored filtered fluid, a flow restrictor to restrict the flow of fluid between the adsorption filter element and the storage vessel and a purg... | 05/05/1987 |
| 4446016 | Solids collecting apparatus for a vacuum drain system An apparatus is provided for collecting solids out of a waste mixture of liquid and solids flowing in a vacuum drain system. The apparatus includes a self-actuating valve means for regulating the flow of waste mixture from a reservoir which accumulates th... | 05/01/1984 |
| 4435286 | Liquid filter device A liquid filter device includes an upwardly open structure having a bottom and a floor positioned above the bottom, the bottom and the floor defining therebetween a chamber. A filter element comprising granular material is supported by the floor within th... | 03/06/1984 |
| 4397747 | Apparatus for plasma separation/exchange by double filtration The invention provides an apparatus for plasma separation/exchange by double-step-membrane filtration, namely separation of blood into plasma and a corpuscular fraction and separation of high-molecular-weight substances (e.g. gamma-globulin) in the plasma... | 08/09/1983 |
| 4391716 | Preferential wicking system Removal of a first liquid, such as water, from a tank containing a second liquid of lower specific gravity, such as diesel fuel, is achieved with a liquid trap chamber into which the first liquid is delivered by a primer wick and from which the first liqu... | 07/05/1983 |
| 4367140 | Reverse osmosis liquid purification apparatus In apparatus for the reverse osmosis purification of water or other fluid in a module containing a membrane, the water is forced into the module under pressure using two piston-cylinder assemblies mechanically interconnected with the pressurized fluid fro... | 01/04/1983 |
| 4347132 | Reverse osmosis expansible pressurized permeate storage having permeate and concentrate controls A water treatment and storage system includes a reverse osmosis treatment unit having an untreated water input line, a treated water output line and a bleed water output line. An expandable container, compressed by a spring arrangement, is provided for st... | 08/31/1982 |
| 4334989 | Fuel-water separator with piston-check valve water disposal to evaporator In an automobile fuel system and particularly for a diesel powered vehicle, it is desirable to provide a water separator to prevent passage of water to the engine and particularly the fuel induction components. It is also desirable to provide ejection mea... | 06/15/1982 |
| 4147629 | Apparatuses to separate a mixture of liquids of different specific gravities, e.g. oil and water An apparatus to separate a mixture of liquids of different specific gravities, e.g. oil and water, in which in a settling vessel for liquids the buoyancy of the lighter liquid (oil) is used to move a diaphragm upwards to control the discharge of lighter l... | 04/03/1979 |
| 4081374 | Balance control water screen Disclosed herein is an improved balance control water screen wherein the linkage associated with the balanced waste door is contained within the walled trough structure so as to provide a minimum number of linkage elements. Further improvements relate to ... | 03/28/1978 |
