Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7981290 | Backwash assembly having a rotating backwash arm for cleaning cloth filter media The present invention relates to stationary cloth media filtration systems and devices, as well as processes and devices, including improved cloth media filter backwashing using a rotating backwash arm assembly. ... | 07/19/2011 |
| 7407573 | Quick countercurrent-type water purifier A quick countercurrent-type water purifier configured with two filters, two motors, a control circuit, a purified water storage tank and a waste water tank, wherein a pipe extends from the waste water tank. Moreover, a raw water inlet pipe connects to the pipe throu... | 08/05/2008 |
| 7370445 | Sludge removal A sludge removal apparatus includes a sludge removal head (10) with a sludge suction duct and an water supply duct with open end portions alongside each other, and a filter (32) adjacent to the open ends of the suction duct (36) and the water su... | 05/13/2008 |
| 7282188 | Method and device for producing a metal hydroxide The invention concerns a method and an apparatus for producing a metal hydroxide, in particular magnesium hydroxide, from a salt solution, wherein the metal is firstly precipitated from the salt solution and the suspension produced in that way is then filtered. The ... | 10/16/2007 |
| 7276223 | Method and device for chemical reaction between a gas and at least one compound in solution carried out in the presence of a solid catalyst A gas/liquid reaction with a liquid containing at least one chemical compound in solution which can react with a gas in the presence of a solid catalyst maintained in suspension in the liquid, the reaction being carried out with separation (recovery) of said solid c... | 10/02/2007 |
| 7258784 | Solid liquid filtration apparatus and method A method and system for separating a particulate contaminate from a contaminated liquid medium involves filtering the contaminated liquid medium with a filter element having an afflux surface made of plastic particles that are sintered together. The contaminated liq... | 08/21/2007 |
| 7250109 | Back-wash filter In the backflush filter (10) according to the invention, in which the flushing back of the filter inserts (15) which are received in several filter chambers takes place by means of flushing filtrate loaded by compressed air, the flush valve (35)... | 07/31/2007 |
| 7105090 | Backflushing filter A filter has three filter elements, e.g., screens, for trapping particulate material while allowing passage of a fluid. The second sides of each of the first and second screens are connected to an intermediate passage, and the second side of the third screen, and th... | 09/12/2006 |
| 7097046 | Automatically cleaning filter assembly for a liquid-carrying loop A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filt... | 08/29/2006 |
| 7070695 | Ultrafiltration and microfiltration module and system A method and apparatus of purifying feedwater to remove impurities including suspended solids therefrom, the method suitable for using in-line water pressure to permeate water through hollow fiber membranes and to backflush the membranes to remove solids collected o... | 07/04/2006 |
| 7052610 | Immersed membrane filtration system and overflow process Modules of ultrafiltration or microfiltration membranes are arranged in a tank open to the atmosphere to substantially cover the cross sectional area of the tank. A filtration cycle has permeation steps and deconcentration steps. During permeation, supply of feed su... | 05/30/2006 |
| 7029579 | System for solid-liquid separation A system for use in filtering a slurry using air pressure to squeeze the slurry material and dewatering it. The system including a source of slurry, a chamber, a filter belt that passes through the chamber, a manifold inlet supplying the slurry to a first side of th... | 04/18/2006 |
| 6935371 | High capacity globe valve A high flow globe valve with a body defining an interior cavity in communication with a first and second fluid passages. A tubular throttling cage is offset in the cavity away from the second fluid passage and has an open end in communication with the first fluid pa... | 08/30/2005 |
| 6893568 | Immersed membrane filtration system and overflow process Modules of ultrafiltration or microfiltration membranes are arranged in a tank open to the atmosphere to substantially cover the cross sectional area of the tank. A filtration cycle has permeation steps and deconcentration steps. During permeation, supply of feed su... | 05/17/2005 |
| 6890434 | Backflush filter, in particular for filtering lubricant oil A backflushing filter for filtering oil includes filter candles 22 which are open at both ends 24, 34 and disposed around a rotary shaft 1 in a filter housing. A cleaning device is moved in conjunction with the rotary shaft and includes upper an... | 05/10/2005 |
| 6861000 | Running method and washing method for spiral wound membrane element and spiral wound membrane module A spiral wound membrane module comprises a spiral wound membrane element including a separation membrane having high back pressure strength. The flow rate of permeate in filtration of the spiral wound membrane element is preferably set to 0.5 to 2.0 m3/m | 03/01/2005 |
| 6827864 | Filtering apparatus and method for washing its filtering elements A filtering apparatus and method comprises parallel filtering elements backflushable with the pressure of the filtered flow. At least one washing organ connecting alternately to the different filtering elements, forms a discharge channel for the washing flow. A free... | 12/07/2004 |
| 6799687 | System and method for linear object reallocation in place A backflush filter device for filter elements (22) is incorporated in a filter housing (10)having a filter inlet (18) and an outlet (20) for the liquid to be filtered. The filter elements (22) permit flow in both directions for a f... | 10/05/2004 |
| 6682652 | Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes An apparatus is described for withdrawing filtered permeate from a substrate contained in a reservoir at ambient pressure. The apparatus includes a plurality of membrane assemblies. Each assembly has a plurality of hollow fiber filtering membranes, immers... | 01/27/2004 |
| 6607660 | Liquid filtration device with backwashing feature A liquid filtration device having a backwashing feature in which liquid flow through the device is reversed with a plate being rotated under the filtration cartridges to allow reverse liquid flow into the individual filtration cartridges to produce the ba... | 08/19/2003 |
| 6596165 | Filtering apparatus A backflushable filtering apparatus for fuel or luboil filter of a motor includes inlet and outlet flow channels, parallel filtering elements open from their ends, in which infiltration occurs from through their jackets, and washing organs at different en... | 07/22/2003 |
| 6592758 | Filter element for a liquid-state process stream A filter element assembly used to filter liquid-state process stream. The assembly includes first and second tubes. A ring is seated in one of the tubes. One or more filter elements extend from the ring into one of the tubes. The ring has a lip that exten... | 07/15/2003 |
| 6543624 | Back-washable filter for liquids The aim of the invention is to improve the backwashing action of a backwashable filter for liquids comprising the following: a filter body which is located in a housing and which separates an incoming flow chamber from an outgoing flow chamber and a backw... | 04/08/2003 |
| 6432310 | Methods of running and washing spiral wound membrane module A spiral wound membrane element is formed by covering a spiral membrane component prepared by winding a plurality of independent or continuous envelope-like membranes around the outer peripheral surface of a water collection pipe through raw water spacers... | 08/13/2002 |
| 6395182 | METHOD FOR PURIFYING WATER, IN PARTICULAR GROUND WATER, UNDER ANAEROBIC CONDITIONS, USING A MEMBRANE FILTRATION UNIT, A DEVICE FOR PURIFYING WATER, AS WELL AS DRINKING WATER OBTAINED BY USING SUCH A METHOD The present invention relates to a method for purifying water, in particular ground water, under anaerobic conditions, using a membrane filtration unit, wherein the following steps are carried out: 1) connecting the membrane filtration unit (8) to a rinsi... | 05/28/2002 |
| 6325922 | Filter device for cleaning plastics melts A filter device for filtering plastic melts includes a filter wheel having cavities which are covered by screening elements. A pressure sensor is provided in a melt inflow line upstream of the filter wheel. A pressure sensor is also provided in a melt out... | 12/04/2001 |
| 6197192 | Filter array with connector for successive backwash A filtration apparatus includes an array of filters arranged in parallel about a rotatable assembly 24 for successively backwashing each of the filter elements 19 within the array. The rotatable assembly includes a connector bachwash shoe 26 and a cage ha... | 03/06/2001 |
| 6153093 | Filter screen pack for extrusion die The filter intercepts dirt emanating from a molten-polymer extruder. The filter is clamped between perforated support plates, and a rotor sweeps the holes in the upstream plate. The rotor defines a cavity which communicates with a small sector of the hole... | 11/28/2000 |
| 6120688 | Portable reverse osmosis unit for producing drinking water A method of purifying impure water to provide drinking water using an apparatus, the method comprising the steps of providing a microfiltration unit, a reverse osmosis unit and a CIP (clean-in-place) tank containing retentate interconnected to permit back... | 09/19/2000 |
| 6004465 | System and process for iodine recovery Disclosed is a method and apparatus for recovering iodine from an aqueous suspension. Particulate iodine is formed on a filter septum and forms a cake of solid iodine. The cake is removed by backwash with a liquid or by blowback with a gas. Contact of the... | 12/21/1999 |
| 6001254 | Method of operating and monitoring a group of filter membrane modules, and a group of modules implementing the method A method of operating and monitoring a group of filter membrane modules connected in parallel and with the modules being periodically backwashed, in which: raw water to be treated is injected at a regulated pressure and the permeate outlet pressure is reg... | 12/14/1999 |
| 5975311 | Filter to be inserted into a pipe and heat exchanger equipped with a filter of this kind A filter includes, in a filter body, a filter unit in the general form of a wheel with, for local contraflow circulation of a cleaning fluid through its filter element, a circulation unit to which a pipe is connected. The pipe is an inlet pipe of the clea... | 11/02/1999 |
| 5972228 | Filters employing "filling bodies" to reduce the amount of backwashing fluid remaining in the filters after backwashing A filtering apparatus comprises: a pressure vessel; a plurality of filter elements arranged within the pressure vessel, the filter elements each having an upper end, a lower end and a side wall; filling bodies positioned within the filter elements; a firs... | 10/26/1999 |
| 5804062 | Water treatment plant with clarifier and peripheral filter Apparatus for treating a liquid containing suspended solids comprising a clarifying vessel and a number of filters positioned around the periphery of the clarifying vessel for receiving and filtering liquid from the clarifier. A filter may be backwashed b... | 09/08/1998 |
| 5785870 | Variable flow filter unit A filter unit (10) designed to filter process streams having different components and/or different fluid flow rates. The filter unit includes an elongated filter housing (12) having an inlet port (14) at one end and an outlet port (19) at the other end. A... | 07/28/1998 |
| 5770072 | Multiple inlet valve with means to isolate each inlet individually and direct a reverse flow therethrough The invention relates to a valve arrangement which can preferably be used in connection with a removal system comprising digester screens for digester liquids in cellulose digesters. The valve is characterized by a housing (1) with inlet openings (7) for ... | 06/23/1998 |
| 5770067 | Device for filtering a fluid A device for filtering a fluid, particularly a molten plastic, with a fluid-supplying canal and a fluid-draining canal is described, whereby two plate-like filters are movably arranged in and across the flow direction of the fluid to be filtered between t... | 06/23/1998 |
| 5762783 | Filter flushing arrangement A filter flushing arrangement is provided and includes a first filtering device, a second filtering device, and a valve arrangement connected to the first and second filtering devices. The valve arrangement is operative to change the direction of fluid fl... | 06/09/1998 |
| 5647980 | Apparatus and method for treating waste water from a residential home Disclosed is a system for processing relatively small volumes of waste water such as that found in residential home use. The system first comprises a chamber adapted to hold the waste water. The system further comprises a first filter adapted to remove co... | 07/15/1997 |
| 5643455 | Concentration of solids in a suspension using hollow fibre membranes A method of concentrating solids in a liquid suspension using a microporous filter assembly having a plurality of hollow microporous, elastic membranes within a vessel, the method including the steps of applying the suspension to an outer surface of the h... | 07/01/1997 |
