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| Number | Title | Issue Date |
| 4470913 | Method and apparatus for fluid assisted filter doffing A fluid assisted doffer (30) is disclosed in combination with a fluid filter (10). The fluid filter (10) includes a rotatably mounted drum (23) covered with a filter screen (25). Fluid is filtered through screen (25) from the upstream to the downstream si... | 09/11/1984 |
| 4447324 | Water screen with revolving screen member A water screen comprises a revolving screen member, e.g., a band screen or a drum screen, and a washing device. The washing device, comprises a sprayer on one side of the downstream run of the screen member and a recovery channel on the opposite side of t... | 05/08/1984 |
| 4431541 | Circular filter device A circular filter having separated inlet and outlet compartments such that cheese whey or the like is pumped into the vessel, is forced across a filter screen, and the filtered whey is discharged downstream for further processing. This invention incorpora... | 02/14/1984 |
| 4368125 | Apparatus for extracting liquid from a suspension Apparatus for extracting liquid from a suspension includes a horizontally mounted rotatable filter media covered concentrator drum with an inner drum rotatable about a horizontal axis within the concentrator drum and defining a suspension transition chamb... | 01/11/1983 |
| 4310424 | Apparatus and method for removing suspended solids from a stream An apparatus and method for filtering and classifying waste or process streams into three product streams using a polymeric net belt to drive a filter drum and hydrophobic polymeric filter element thereon. A matte of solids is doctored from the belt to pr... | 01/12/1982 |
| 4310414 | Liquid separator A portable machine for separating liquid from a slurry comprising an interconnected pair of beams cantilevered above the base with a plurality of rollers rotatably mounted between them. An endless belt is carried on and driven by the rollers to move upwar... | 01/12/1982 |
| 4279760 | Process and apparatus for continuous cake filteration under pressure The present invention utilizes a closed-type vessel comprising a filtering chamber, at least one perforated filter cylinder a portion of which is positioned within the filtering chamber, said filter cylinder being rotatable at any desired speed and having... | 07/21/1981 |
| 4265764 | Rotary drum vacuum filter In a rotary drum vacuum filter, the drum sectors are connected by conduits to apertures in a rotary valve member on the drum which is opposed to a fixed valve member. The valve members thus control supply of vacuum (to cause suction filtering) and pressur... | 05/05/1981 |
| 4256582 | Continuous separation system A continuous separation system which continuously purges, washes, dries, and removes solids with a minimum amount of mechanical handling and consequential crystal breakage. A separator within the continuous separation system of the present invention compr... | 03/17/1981 |
| 4239626 | Filter for removing fines A filter is disclosed for removing loose particles carried in a liquid stream such as loose paper particles in a bottle washing machine. An outer tank surrounds an inner rotatable finely perforated drum mounted on an axial shaft running throughout the dru... | 12/16/1980 |
| 4201674 | Apparatus for cleaning plate-type filter elements located in a tank filter In cleaning plate-type filter elements in a tank filter, the tank is opened and a cleaning tube is placed upwardly around one of the downwardly extending filter elements providing an annular flow space along the length of the element. A seal member is loc... | 05/06/1980 |
| 4169792 | Water intake device A water intake device comprising a substantially cylindrical rotatable screen adapted to be at least partially submerged in a body of water, means for rotating said screen, a water supply conduit communicating with the interior of said screen to receive w... | 10/02/1979 |
| 4159947 | Dewatering system The dewatering system includes a first endless filter belt movable along its length through an upper run, then through an arc about a dewatering drum, and then through a lower return run in a sinuous path about a plurality of rollers. A flowable aqueous m... | 07/03/1979 |
| 4146476 | Peeling centrifuge In a peeling centrifuge comprising a rotatable centrifuging drum which is surrounded by a stationary filtrate collection chamber having an outlet, and wherein the drum perforations communicate directly with that chamber, regeneration of the filter bed is ... | 03/27/1979 |
| 4139467 | Disc press for continuous pressing of aqueous or suspended pulp A disc press for continuous pressing of aqueous or suspended pulp for fractionating the pulp in a liquid fraction and a dry substance fraction, comprises two plane parallel pressing discs mounted for rotation about a shaft and having strainer plates which... | 02/13/1979 |
| 4137177 | Filtering apparatus for sludgy liquids Filtering apparatus comprising a stationary housing and a rotary filter d having a peripheral filter screen with elongated filter openings extending parallel to an axis thereof and disposed within the housing to define a space between the filter drum and... | 01/30/1979 |
| 4097379 | Self-cleaning filter assembly The self-cleaning filter assembly includes a collecting tank for receiving a liquid, such as the dirty wash water from a car washing installation, containing suspended or dispersed substances to be removed. The dirty wash water passes through a filter clo... | 06/27/1978 |
| 4092247 | Method and apparatus for dewatering thickened sludge Process for dewatering thickened sludge comprising the steps of depositing thickened sludge onto a porous support, partially dewatering the thickened sludge by establishing a vacuum within said porous support, compressing the partially dewatered sludge on... | 05/30/1978 |
| 4076623 | Continuous oscillation of liquid separator A liquid separating screen member is continuously oscillated, with an amplitude larger than the apertures in the screen member face, from a middle position with substantially the same speed in first and second opposite directions. The screen member separa... | 02/28/1978 |
| 4069154 | Vacuum filtration process employing a circular vacuum box A process which enables a mixture of liquid and gas, coming from a rotary vacuum filter, to be collected and simultaneously separated. The mixture of gas and liquid is passed from the filter into a vacuum box provided with a space which rotates around the axis... | 01/17/1978 |
| 4062779 | Apparatus for thickening and extracting the liquid from a sludge An apparatus for thickening and extracting the liquid from a sludge comprises a sludge-thickening assembly wherein solid matters in the sludge are coagulated to form coagulated flocs and the floc sludge is separated and thickened, and an assembly for extr... | 12/13/1977 |
| 4057437 | Continuous belt filter and filtration method An endless belt gravity filtration apparatus which includes a vacuum system for removing filter cake and for cleaning and keeping filter belt porous through reverse air flow on the endless belt filter. The belt filter has extensions along each of its cont... | 11/08/1977 |
| 4056363 | Apparatus for the fabrication of pure alumina from Al2 O3 and silica containing raw materials by leaching with hydrochloric acid An apparatus for the production of pure alumina from alumina and silicate containing raw materials comprising means to feed said raw material into the top of an acid resistant leaching tower; means to continuously feed a leaching liquor containing hydroch... | 11/01/1977 |
| 4032442 | By-pass and synchronized blow system and method for rotary vacuum filters A method and system for use with rotary vacuum filters having a plurality of circumferentially spaced filter segments, for selectively applying blower air to the filter segments at predetermined rotational positions at which relatively unrestricted openin... | 06/28/1977 |
| 4008158 | Dewatering machine A dewatering machine comprises an integral and cooperative combination of a vacuum filter of the rotary drum type and an expression device of the diaphragm type. An intermittently-indexed endless filter medium belt carries a sheet of filter cake to the ex... | 02/15/1977 |
| 4000074 | Centrifuge having an inner, invertible, funnel-like container Primary explosives, e.g. lead azide, dispersed in a liquid medium, e.g. enol, are filtered, washed and dried in a novel centrifuge, wherein the rotatable extractor basket has an open bottom, which is closed by peripheral attachment to the large open end ... | 12/28/1976 |
| 3998735 | Apparatus and method for separating a mother liquor into a concentrated particulate fraction and a filtrate fraction An apparatus provides for continuous filtration of a mother liquor and continuous removal of solids from the filter element so that the apparatus need not be shut down for cleaning or replacement of the filter element. The solids are separated from the mo... | 12/21/1976 |
| 3997447 | Fluid processing apparatus Described are fluid processing devices primarily intended for filtration but which devices may also be used for dispensing or sparging liquids and gases into a body of fluid medium. According to the method of using the disclosed devices, fluid medium to b... | 12/14/1976 |
| 3966611 | Filter In filters of the type in which a cake of solids deposited from a liquid slurry thereof on a generally horizontal filter medium is subjected to treatment involving passage of liquid through the cake while on the filter medium, means is provided for increa... | 06/29/1976 |
| 3959438 | Method for the fabrication of pure alumina from Al2 O3 and silica containing raw materials by leaching with hydrochloric acid A process for the production of pure alumina from alumina and silicate containing raw materials comprising feeding said raw material into the top of an acid resistant leaching tower; continuously feeding a leaching liquor containing hydrochloric acid into... | 05/25/1976 |
