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| Number | Title | Issue Date |
| 7334986 | Centrifugal fan A centrifugal fan, in which an expansion angle of a radius of curvature of the outer periphery of a scroll housing from a position angle of a cutoff portion, serving as a suction portion, to a designated portion from the former in the direction of air flow is gradua... | 02/26/2008 |
| 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 |
| 7258238 | Debris filter with a rotating debris extractor A filter for filtering solid particles from liquids, especially for use in steam condensers and heat exchanger in thermal and nuclear power plants, said filter comprising a housing (4), a screen basket (2) located within said housing (4), a debr... | 08/21/2007 |
| 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 |
| 7083735 | High debris content strainer A high debris content strainer that utilizes a cylindrically-shaped screen having four removal assemblies positioned evenly around the screen periphery. Each removal assembly includes a backwash spray bar on the downstream side of the screen and a scraper/brush and ... | 08/01/2006 |
| 7055699 | Self-cleaning mechanical filter A self-cleaning mechanical filter comprises a mechanism for simultaneously cleaning the internal surface and the external surface of a filter element. The filter is provided with structure for performing suction scanning of solid materials accumulated on the interna... | 06/06/2006 |
| 6918951 | Disc-type air filters An air filter includes a stack of filter discs formed with contacting faces having surface formations defining filtering passageways between adjacent discs for removing solid particles from the air passing through the stack. The filter discs in the stack further inc... | 07/19/2005 |
| 6833077 | Sequential swinging precoat removal and renewal system, filter so equipped and method A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of t... | 12/21/2004 |
| 6495038 | Centrifugal separator with vertically detachable casing The present invention provides a centrifugal separator comprising a top lid, a rotatable basket, a drive unit for the rotatable basket and an outer case, the rotatable basket and the drive unit being mounted on the top lid, the rotatable basket and the ou... | 12/17/2002 |
| 6495031 | Enclosed belt filter apparatus A liquid filter apparatus includes a filter media belt enclosed by sealably mated cover pan and floor pan defining a vacuum chamber connected to a sealed clean liquid tank, with clean liquid pumped out continuously to draw liquid to be filtered into an up... | 12/17/2002 |
| 6431370 | Direct enzyme agglomeration process Detergent formulations are prepared by directly agglomerating a fermentation broth extract, containing a detergent-type enzyme and a nonionic detergent-type surfactant, with a suitable detergent base mixture, without need for prior isolation of the enzyme... | 08/13/2002 |
| 6294098 | High efficiency backwash shoe In an apparatus containing rotating filter media that removes solids from a fluid stream, the invention provides devices and methods for improved cleaning of the filter media. Solids trapped on the filter media are removed by the application of a suction ... | 09/25/2001 |
| 6251294 | Ultrasonic filter regenerating apparatus and method A self-regenerating filter unit having a housing which carries an ultrasonic transducer periodically energizable to dislodge caked solids from a filter element in the housing. The removed solids collect in a storage zone where they are periodically remove... | 06/26/2001 |
| 6241879 | Filtering machine and filter cloth therefor A filter cloth comprising at least a base layer and a filtering layer, characterized in that the ratio T/L of the thickness (T) of the filtering layer to the length (L) of fibers of fiber bundles constituting the filtering layer is 0.02 to 0.7 and the sum... | 06/05/2001 |
| 6136202 | Forced fluid induced backwash A system for filtering fluids uses the pressure differential across a filter element between an internal filter volume and an external filter volume to control the rate of fluid flow through the filter element. The internal filter volume communicates with... | 10/24/2000 |
| 6105786 | Surfactant-based extraction process A process is disclosed for preparing a detergent powder containing enzymes where the enzymes are extracted from a fermentation broth with a salt and surfactant mixture and directly agglomerated with detergent paste and dried to form the detergent powder. ... | 08/22/2000 |
| 5946766 | Cleaning belt for an industrial belt The invention provides a cleaning method for removing dirt on an industrial belt and a cleaning belt used in the same. A cleaning belt having through-holes is provided onto an industrial belt. The cleaning belt comprises structural unit pieces in parallel... | 09/07/1999 |
| 5614094 | Vibrating screen unit A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the fram... | 03/25/1997 |
| 5554284 | Backwashable filter for fluids A backwashable fluid filter formed with a filter element which is disposed so that it can be rotated about its axis inside the filter housing by a drive mechanism and through which a radial flow passes. A backwashing device is provided which includes a di... | 09/10/1996 |
| 5370791 | Backwashable self-cleaning strainer A backwashable self-cleaning strainer has a vertical housing containing a rotatable strainer basket. The housing has an inlet adjacent the top thereof and an outlet adjacent the bottom wall, with a flush discharge opening in the bottom wall. Components fo... | 12/06/1994 |
| 5312551 | Mobile mud dehydrator A mobile multi reservoir unit aspirates liquid with solids from septic tanks, treats immediately the liquor by a flocculent polymer and dehydrates the product by a low speed vertical centrifugal machine; the liquid is returned to the septic tank and the s... | 05/17/1994 |
| 5264138 | Method and apparatus for treating a fiber suspension A method and apparatus for fibrous suspensions in the wood processing industry and more specifically to a so-called drum cylinder, the basic construction of which comprises a vessel, into which suspension being thickened is supplied and a wire-surface cyl... | 11/23/1993 |
| 5194153 | Apparatus for sealing a center valve vacuum filter A seal for a rotating center valve vacuum filter drum has a non-flat cross section with an elastomeric core and a chemical resistant sheathing. The seal is installed under tension so that, as wear occurs during operation, positive sealing contact is maint... | 03/16/1993 |
| 5183568 | Self-cleaning strainer A self-cleaning strainer comprises a vertically disposed housing which contains a rotatable strainer basket. The housing has an open top, closed by a closure plate, an inlet adjacent the top of the housing and an outlet adjacent a closed bottom of the hou... | 02/02/1993 |
| 5171433 | Back-flushable filter A filter device includes a tube connectible to a fluid line for the fluid to be filtered, and a housing enclosing the tube and including a partition dividing its internal chamber into two compartments each including a filter body. The housing and partitio... | 12/15/1992 |
| 5059313 | Conveyor rake sieve with hook-like plates A separating apparatus, in particular for clarification plants, comprises a revolving strainer rake or rake sieve having a plurality of series connected rake sieve sections which each consist of adjacently disposed hook-like plates, each plate having a ho... | 10/22/1991 |
| 4986918 | Membrane separation system and method of operation An improved separation system and its method of operation for the separation of solutes, colloidal particles, or suspended matter from solutions of suspensions containing the same is disclosed. In a preferred embodiment, this invention relates to a simple... | 01/22/1991 |
| 4867879 | Pipeline sieve with a suction removal device A device for mechanically purifying liquids in a pipeline includes a rotation-symmetrical sieve chamber forming a section of the pipeline and having an inlet with a central axis, a rotation-symmetrical sieve body having an inner surface and being disposed... | 09/19/1989 |
| 4769986 | Apparatus for washing cellulose with a rotary drum An apparatus for washing cellulose, wherein the cellulose is conducted through between a rotary drum and a stationary shell encircling it, in the form of a layer supported by the permeable mantle surface of the drum. The principle of operation of the appa... | 09/13/1988 |
| 4740302 | Direct-flushing filter and discs particularly useful therein A direct-flushing fluid filter comprises a filter body disposed within a housing and defining a first plurality of parallel flow paths from the housing inlet to the filtered fluid outlet, and a second plurality of parallel flow paths from the housing inle... | 04/26/1988 |
| 4683059 | Vacuum breaker valve-discharge elbow assembly for rotary drum filters A rotary drum filter of the pipe machine type has a stationary vacuum breaker valve-discharge elbow assembly at the discharge end of the drum which defines a streamlined, smoothly curving, and substantially unobstructed discharge flow passage with gradual... | 07/28/1987 |
| 4608171 | Adjustable mounting for valve-discharge elbow of rotary drum filters A vacuum breaker valve-discharge elbow assembly for a rotary drum filter of the pipe machine type is adjustably mounted to the drive gear housing for the filter via a separate mounting plate. A valve flange is secured to the mounting plate. The mounting p... | 08/26/1986 |
| 4608170 | Angularly adjustable breaker valve-discharge elbow for rotary drum filters A vacuum breaker valve-discharge elbow assembly for a rotary drum filter of the pipe machine type is adjustably mounted to the drive gear housing for the filter via a separate mounting plate. A valve flange comprising a separate clamping ring clamps the v... | 08/26/1986 |
| 4427545 | Dual fuel filter system A fuel filter is provided for internal combustion engines and particularly for diesel engines utilizing a dual filter zone arrangement fed by two separate fuel supply lines, each of these lines being valved to operate in an open mode in which fuel is pump... | 01/24/1984 |
| 4226715 | Apparatus and method for separating entrained particulate matter from a conveying fluid An apparatus and method for separating entrained particulate matter from a fluid wherein particulate matter is collected in an overlying porous layer on an upstream side of a rotatable, fluid-permeable filter in a first chamber, and rotatably conveyed int... | 10/07/1980 |
| 4154687 | Replaceable valve seat for center valve filter drum A rotary drum filter of the center valve type has replaceable valve seats in the form of pairs of opposed arcuate valve seat segments which are threadedly connected to channel sidewall portions of the drum in the region of the annular channel which receiv... | 05/15/1979 |
