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| Number | Title | Issue Date |
| 8118175 | Venting device for a disc filter A filter device having a vent device for inhibiting formation of a vacuum in the filter device. The filter device includes a drum for receiving the liquid wherein the drum includes a drum headspace. The filter device also includes filter sets for filtering the liqui... | 02/21/2012 |
| 7926666 | Rotary filtration system A rotary filtration apparatus for filtering a feed fluid into permeate is provided. The rotary filtration apparatus includes a container that has a feed fluid inlet. A shaft is at least partially disposed in the container and has a passageway for the transport of pe... | 04/19/2011 |
| 7374050 | High capacity and high efficiency filter deck assembly A rotary drum filter has a plurality of longitudinally extending division grids mounted about the outer circumference of a drum. A plurality of corrugated sheets are provided, with the leading and trailing edges of each sheet mounted to circumferentially adjacent pa... | 05/20/2008 |
| 7347916 | Vacuum washer drum A vacuum drum washer is designed to enable the use of an end-draining drum for drum lengths exceeding 20 feet. The drum washer includes a cylindrical drum having a mesh screen defining an exterior wall. A plurality of outer filtrate channels are disposed radially in... | 03/25/2008 |
| 7293659 | Drum structure for rotary drum filtering apparatus and methods of using same A drum structure for corrugated type rotary filters has relatively high filtering efficiency and relatively low manufacturing and/or installation costs. More specifically, a corrugated deck section is rigidly connected to a rotary drum structure by means of solid no... | 11/13/2007 |
| 7293658 | Drum filter assembly A drum filter assembly comprising a hollow drum filter having a longitudinal axis and an outer filter screen or mesh material, the drum filter being supported on external rollers for rotation about its longitudinal axis and an inlet for introducing liquid to be filt... | 11/13/2007 |
| 7285180 | Perforated deck made out of a plurality of segments A cylindrical rotating thickening device including an axial core, a plurality of longitudinally extending spaced apart support ribs extending radially from the axial core, and a shell surrounding the support ribs and supported thereon. The shell includes a plurality... | 10/23/2007 |
| 7249472 | Device for treating textile or similar in a continuous stream The invention relates to a device for treating web-type textiles, nonwovens or paper in a continuous stream, uses a gaseous treatment agent that circulates in the device. The product lies on the exterior face of a permeable drum (5), which is subjected to an ... | 07/31/2007 |
| 7150826 | Filtering apparatus A liquid filtering apparatus for mounting in a housing and positioned to filter liquid flowing from an inlet (23) to a drain. A rotatable wheel is disposed within and coupled to a rotating screen so that rotation of the wheel causes rotation of the screen. Th... | 12/19/2006 |
| 7104510 | Removable balancing assembly for rotating cylindrical structures The present invention provides an apparatus and a method for compensating for small variations in balance and alignment when supporting and rotating a massive cylindrical drum. The apparatus comprises a self-aligning flange having projections spaced 90° apart about... | 09/12/2006 |
| 6868973 | Drum type refining or washing apparatus The present invention provides a drum type refining or washing apparatus in which the refining or washing efficiency of a pulp suspension or a food suspension is remarkably enhanced by the filtration function of a rotary drum and by the filtrate sucking force of a f... | 03/22/2005 |
| 6579458 | Screening device A screening device includes a screening element connected to a reinforcing element by a frictionally engaging clamping connection. Spacers located between the screening element and the reinforcing element provide a radial clearance therebetween. The scree... | 06/17/2003 |
| 6311849 | Device for dehydrating and washing suspensions of fibrous material The invention relates to a device for dewatering and washing fibre stock suspensions with two counter-rotating rolls (2, 3), a stock feed (4, 5) and a stock discharge (6). It is mainly characterized by the headbox (4, 5) at the two rolls (2, 3) being arra... | 11/06/2001 |
| 6190551 | Reservoir shower for rotary vacuum filter The invention provides a shower module that includes an upper elongated chamber, a supply pipe located in the upper elongated chamber, wherein the supply pipe includes at least one discharge opening that faces a side wall of the upper elongated chamber, a... | 02/20/2001 |
| 6113783 | Device in a filter sector for a rotating filter disc A filter sector for a rotating filter disc has filtrate conduits for filtrate resulting from filtration which is discharged at the more narrow end of the filter sector. The filtrate conduits are outwardly defined by a filtrating layer permeable to the fil... | 09/05/2000 |
| 6006554 | Two stage counter current drum washer Paper fiber suspended in black liquor is washed in a rotating drum divided into a plurality of adjacent sectors. The fiber is formed into a mat on the drum, and the drum is rotated so the sectors progress through a first wash and a second wash of progress... | 12/28/1999 |
| 5925246 | Apparatus for aseptic vortex flow concentration An apparatus is provided having a rotor inside a membrane for the aseptic vortex flow concentration of a liquid or semisolid dispersion which has a shed-resistant bearing interface so that unwanted bearing material does not contaminate the substances, e.g... | 07/20/1999 |
| 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 |
| 5901585 | Drum supported by support rollers for washing fibre material Apparatus for treating pulp, comprising a stand (1); a rotatably mounted drum (3); feeding and discharging members (6, 8) for the pulp; a wall member (2) which surrounds the jacket (40) of the drum in order to delimit therebetween a material space (5) wit... | 05/11/1999 |
| 5798039 | Drum filter system with removable filter elements and a pawl rotation mechanism A drum filter system includes a tank in which a rotary drum is disposed with liquid to be filtered entering inside the drum and exiting peripherally of the drum. The drum consists of a plurality of individual filter elements that are removable in a direct... | 08/25/1998 |
| 5792352 | Disc filter and filter elements A disc filter for separation of liquids from suspensions, in particular fiber stock suspensions, having several filter elements, in particular sector-shaped filter elements, which have a frame and filter areas mounted on both sides, over which a filter me... | 08/11/1998 |
| 5792349 | Drum filter for separating solids/liquid mixtures In order to create a rotating drum filter with a filter medium that is extremely fine-meshed and nonetheless has a long service life, whereby the filter medium need not be completely replaced given localized damage thereto, it is inventively proposed that... | 08/11/1998 |
| 5722264 | Single roll displacement wash press A single roll wash press comprising a housing and a drum rotatably mounted within the housing. The drum includes a perforated outer wall and a longitudinally extending centerline axis and is rotatable about the axis. The press further comprises a means fo... | 03/03/1998 |
| 5683582 | Air inflow restrictor for vacuum filters A rotary drum filter valve is provided with a valve having a valve segment with a first part which partially restricts the flow of filtrate from a head section and a second part which blocks from the head section.... | 11/04/1997 |
| 5683581 | Belt-type filter apparatus for removing foreign particles from liquid baths A belt-type filter apparatus for removing foreign particles from liquid baths includes a basin containing the liquid, a filter belt which is constructed as an endless perforated circulating support belt and/or a filter belt fleece which can be wound from ... | 11/04/1997 |
| 5676847 | Method for recovering crystals from slurry with wash water recycle means A method for recovering crystals from a crystal-containing slurry, which comprises supplying the slurry to a rotary filter having a rotating cylindrical filter medium, filtering the supplied slurry in a filtering region to retain the crystals on the filte... | 10/14/1997 |
| 5674396 | Rotary filter with a device for separating a solids/liquid mixture, particularly a pulp suspension The invention refers to a rotary filter with a device for separating a liquid-solid mixture, particularly a pulp suspension, with several separate zones, at least one of which is of variable design. It is mainly characterized by the variable design for th... | 10/07/1997 |
| 5667642 | Pulp slurry-handling press roll and twin and single roll slurry handling presses A drum having a longitudinal axis, and an outer periphery, has a multiplicity of longitudinal, drainage grooves formed therein, and a cylindrical sheath encloses the drum, the sheath having a multiplicity of holes formed therein. The drum is imperforate. ... | 09/16/1997 |
| 5641402 | Multistage disc filter A disc filter used in the pulp and paper industry meets modern requirements by axially dividing the tank and shaft (with the flow channels) into at least two separate and distinct portions, so that the treatment of pulp in several different stages using t... | 06/24/1997 |
| 5620598 | Suction head arranged between a filtrate channel and a barometric leg of a rotating filter A suction head arranged between a filtrate channel and a barometric leg of a rotating filter having at least one filter means communicating with the filtrate channel. The filtrate channel is connected to the barometric leg through the suction head. In ord... | 04/15/1997 |
| 5607588 | Scraper for scraping filter cake from moving filter medium An elongate scraper apparatus for scraping filter cake from a moving filter medium of a filter apparatus comprises an elongate bar or scraper having a length sufficient to substantially span the face of the filter medium upon which filter cake is deposite... | 03/04/1997 |
| 5582728 | Pressure washer drum In prior pressure washer drums, the filter deck was supported on the central shaft by spokes welded to the central hub which was in turn welded to the shaft. The extreme forces caused premature failure of the welded joints. The present invention provides ... | 12/10/1996 |
| 5529319 | V-notch seal for non-flooded zone of disc filter valve A circumferential seal for a disc filter valve to rotary collection pipe is formed by a radially compliant circumferentially restrained and tensioned seal disposed in a split "V" notch formed in a non-flooded zone between the stationary valve plate and th... | 06/25/1996 |
| 5503737 | Air inflow restrictor for disc filters A rotary filter valve is provided with a variable restriction of the timing plate which minimizes bypass gas entering the vacuum system during emergence of the filter elements from the submerged condition.... | 04/02/1996 |
| 5480546 | Rotating screen drum with a stainless lining A screen dram for the dewatering and/or washing of cellulose pulp, comprises a first cylinder (2) made from non-stainless material, which is rotatable about its axis (5); a cylindrical screen plate (6) arranged coaxially on the outside of the first cylind... | 01/02/1996 |
| 5480545 | Cross braced vacuum washer A washer drum is provided with unique cross bracing which prevents twisting, reduces vortex formation in radial inflow ports, and further provides support for the decking between closely spaced intermediate heads.... | 01/02/1996 |
| 5470471 | Anti-rewet deck for press rolls An anti rewet deck is provided for press rolls used to increase consistency of fibrous pulp slurry from approximately 4 percent up to about 30 to 50 percent. This is accomplished by biasing the location of the drainage holes in the roll shell to the forwa... | 11/28/1995 |
| 5460019 | Washer The invention concerns a drum washer. The washer has a shaft formed by two cones (46) placed with their bases against one another. The shaft can be used as a supporting structure for the drum. Vanes (48) can also be placed on it for assisting in collectin... | 10/24/1995 |
| 5443737 | Rotary drum with radial spray jets A separation device for suspensions comprises a housing (1), a filter body (3) with a wall of filter material situated in the housing, spray means (14) adapted to spray jets of a suspension to be separated directly onto one side of the wall of filter mate... | 08/22/1995 |
| 5421176 | Drum washer The invention concerns a drum washer. The washer has two plates (14; 18) located after each other in parallel with the drum, and the pulp to be washed is conducted between these plates. Between the plates there is a gap (22) closed by a flap valve (25) by... | 06/06/1995 |
