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| Number | Title | Issue Date |
| 6892891 | Manure management system using sloped screen separator A manure management system that removes a large percentage of solids from a manure slurry when the slurry is run across a series of sloped screen separators. The sloped screen on the separator has very small openings. In addition, the separator has a water line with... | 05/17/2005 |
| 6726022 | Screening device and rotor for use in a screening device Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject p... | 04/27/2004 |
| 6585115 | Apparatus and method for transferring dry oil and gas well drill cuttings An apparatus and method for removing and recovering up to 98 percent of the residual drilling mud and fluids from drill cuttings for reuse and storing the drill cuttings in a relatively dry state thereby reducing cuttings volume requirements for storage a... | 07/01/2003 |
| 6352159 | Dual deck dewatering screen A vibrating dual deck dewatering unit which includes a lower screen deck and an upper screen deck. Material being processed by the unit is discharged from the upper screen deck onto the lower screen deck in such a manner that excess water is allowed to ba... | 03/05/2002 |
| 6155427 | Zoned pressure screen Pressure screening apparatus for screening a suspension of papermaking stock employing an enclosing housing and a cylindrical screen, with a drum type rotor, has the screen divided or formed with axially spaced annular screening zones and a corresponding ... | 12/05/2000 |
| 6149811 | Dredging system The present invention is directed to a continuous, portable dredging system that employs a series of screens and gravity separation devices with flocculation to remove sediments from the dredged slurry. The system produces a treated water stream having lo... | 11/21/2000 |
| 6138836 | Blade arrangement for pulp screening apparatus In the arrangement, the cross section of a blade rotating close to the surface of a screen cylinder changes in such a way that as the pulp consistency changes in the vertical direction of the screen cylinder, the cross section of the blade also changes in... | 10/31/2000 |
| 6019228 | Vibrating screen deck support framework system A modular deck support framework system employing support tray framework sections for vibrating screens having an essentially rectangular outlined perimeter framework. Each support tray perimeter framework has at least: two opposed side framework members ... | 02/01/2000 |
| 5967334 | In-situ self-cleaning feed system for separation equipment A process and apparatus that allows a portion of a feed system to be cleaned quickly by sequentially closing a feed passageway which leads to a sieve section; rotation of the sieve section to an upside-down position to allow blocking clumps of particles t... | 10/19/1999 |
| 5938936 | Method for dewatering flocculated materials The present invention is directed to a continuous, portable dredging system that employs a series of screens and gravity separation devices with flocculation to remove sediments from the dredged slurry. The system produces a treated water stream having lo... | 08/17/1999 |
| 5778910 | Washing trough for residual concrete The invention relates to an apparatus for reprocessing residual concrete with a trough (3), conveying equipment (33) with an adjoining bucket wheel (37) and discharging equipment (11). The inventive apparatus is distinguished owing to the fact that the wa... | 07/14/1998 |
| 5624038 | Curved free standing garden sieve A free standing curved garden sieve of parabolic shape to separate stones and coarse matter from garden soil as the garden soil travels from upper substantially vertical portions to lower substantially horizontal portions.... | 04/29/1997 |
| 5497886 | Screening apparatus for papermaking pulp A hydrodynamic device for generating negative pressure excursions in a pulp slurry during fine screening, includes a plurality of half-foil members disposed on a substantially cylindrical outer surface of a rotor. The rotor is mounted within and co-axial ... | 03/12/1996 |
| 5472608 | Overflow sieve An overflow sieve in which the sieve bottom is in the form of a slotted hole sheet whose slots have a width less than 1.0 mm and a length of 0.5 to 4 mm or a fine hole sheet with noncircular holes of a greatest width or diameter of less than 2 mm.... | 12/05/1995 |
| 5429247 | Method and apparatus for screening peat moss material Method and apparatus for screening peat moss material. The method comprises the steps of forming an aqueous slurry of peat moss material and flowing the slurry on a screen to separate fines from coarser particles in the slurry. A spray of relatively large... | 07/04/1995 |
| 5354467 | Sieve bend Apparatus of the type known as Sieve Bends which serve to separate particles differing in size. The apparatus includes a headbox that receives feed slurry and a throat that receives the slurry from the headbox. Means is provided in the throat for yieldabl... | 10/11/1994 |
| 5307939 | Screening apparatus for papermaking pulp A hydrodynamic device for generating negative pressure excursions in a pulp slurry during fine screening, includes at least one half-foil member disposed on a substantially cylindrical outer surface of a rotor. The rotor is mounted within and co-axial wit... | 05/03/1994 |
| 5141650 | Pressure screen A portable pressure screen apparatus is disclosed having a cylindrical shaped pressure housing defining upper and lower hingedly connected halves. The housing includes a slurry inlet aperture raised relative to a filtered slurry discharge port situated at... | 08/25/1992 |
| 5123542 | Method and apparatus for cleaning, distributing and aerating grain An improved apparatus for cleaning, distributing and aereating grain is mounted in a storage structure and includes a frustro-conical screen device secured symetrically to an imperforate funnel-shaped member. A fan assembly is secured to the funnel-shaped... | 06/23/1992 |
| 5108602 | Straining apparatus with a continuous inwardly helical open channel The invention relates to a straining apparatus for the separating of solid-liquid mixtures with a downwardly tapering straining basket, the basket inside wall of which has an inclination () increasing from top to bottom, the charging of material to... | 04/28/1992 |
| 4952309 | Auger-type flour sifter A flour sifter for separating doughballs from fine particulate matter in a breading mixture, comprises a hopper for receiving the breading mixture. The lower portion of the hopper includes a sifting screen along most of the longitudinal length that is siz... | 08/28/1990 |
| 4902409 | Nozzle for screen apparatus A nozzle block (66) and a sieve screen unit (12), in which the outlet aperture (78) of the nozzle body (68) has a substantially oval shape to produce a fan-shaped flow pattern against the screen (24). Two nozzle blocks (66a), (66b) are mounted within the ... | 02/20/1990 |
| 4849105 | Apparatus for removing solid particles from cooling water An apparatus for removing solid particles from cooling water having a tubular housing (1), a funnel-shaped trap sieve (4) attached to the inner housing wall with the tip facing in the flow direction, and a pressurized water sprayer (11). The sprayer inclu... | 07/18/1989 |
| 4750997 | Grain cleaner and spreader A portable, collapsible grain cleaner and spreader apparatus is used to evenly spread and clean grain or similar crops as the grain is introduced into a storage structure. The grain cleaner and spreader apparatus comprises a vertically disposed grain rece... | 06/14/1988 |
| 4710296 | Static sieve feed control In a static sieve assembly having a housing for mounting a sieve or screen, a feed box having a discharge spout for feeding material tangentially to and across the sieve, a side of the spout having flexibly connected fixed upper and movable lower parts, a... | 12/01/1987 |
| 4696738 | Material separating surface An aggregate separator has a fan-shaped separating surface made up of an array of diverging end-stretched wires which are permitted to oscillate individually in response to vibratory stimulus. The surface includes a plurality of identical fan-shaped panel... | 09/29/1987 |
| 4561972 | Combine sieve plate A grain harvesting combine is provided with an improved sieve plate for more efficient cleaning of the grain. The sieve plate is mounted on the combine adjacent the rearward end thereof and is substantially rectangular in shape. The sieve plate has forwar... | 12/31/1985 |
| 4512880 | Method of removing slimes from slurries Method of removing slimes from slime-containing slurries in which the slurry is force fed at an acute angle onto a downwardly directed screen surface of a welded profile wire screen having fine screen openings at a pressure which for the slime content and... | 04/23/1985 |
| 4422937 | Static screen A reversible static screen for classifying and dewatering flowing slurries, the screen being inclined and having a flow or screening surface formed by laterally spaced screen wires disposed normal to the flow direction of the slurry and so spaced that the... | 12/27/1983 |
| 4371435 | Placer mining sluice A placer mining sluice for separating relatively heavy particulate valuable materials from relatively light waste material. The mining sluice includes an inverted generally V-shaped grizzly screen having first and second sides which slope downwardly and o... | 02/01/1983 |
| 4269701 | Cyclone separator for the removal of heavy particles and dust particles from fibre material A cyclone separator for separating heavy particles and dust particles from fibre material. The separator includes a cyclone housing (2), an inlet tube (9) that opens substantially tangentially into the housing (2), an overflow pipe (6) for the removal of ... | 05/26/1981 |
| 4265742 | Screen element The invention provides screen elements of polyurethane, or a material having similar characteristics, having metal reinforcing rods embedded in and extending only in a single direction and across the full width of the screen element between lateral suppor... | 05/05/1981 |
| 4251356 | Apparatus for classifying the constituents of a pneumatically conveyed tobacco-containing stream The outlet of a pneumatic conveyor delivers a mixture of tobacco leaves and sand to the upper end of an arcuate duct which is located below a rotating air withdrawing wheel. That wall of the duct which faces the outlet of the pneumatic conveyor has holes ... | 02/17/1981 |
| 4250038 | Screen device and method A sieve or screen of the type supported in an inclined position so that a slurry can cascade downwardly over a working surface of the screen is formed with spaced apart, generally parallel rods or wires which extend transversely to the direction of slurry... | 02/10/1981 |
| 4246998 | Conical screen structure An improved, multiple-well screen structure is provided which is especially adapted for use in a large scale reactor employed in oil shale processing operations. The screen includes a plurality of adjacent, juxtaposed concavities each presenting perforate... | 01/27/1981 |
| 4129259 | Apparatus for pulping waste paper materials Recovery of paper fiber for reuse from waste paper materials containing plastic sheet and film is facilitated by the combination of a pulper in which the waste paper materials are pulped in a pulper equipped with a junk remover connected with the bottom o... | 12/12/1978 |
| 4120790 | Synthetic rubber dewatering apparatus and method An apparatus and method for dewatering rubber crumb in which a slurry of rubber crumb and fines overflowed from a feed tank onto a curved screen for dewatering is subjected to a change in direction away from the screen by a fixed baffle in the feed path u... | 10/17/1978 |
| 4113626 | Dewatering screen Screening apparatus provides improved dewatering of liquid slurries by flowing the slurry across a generally parabolically shaped perforate screening surface inclined at an angle to the horizontal. The angularity of the generally parabolically shaped scre... | 09/12/1978 |
| 4097382 | Dewatering screen Screening apparatus that provides improved dewatering of liquid slurries includes a plurality of spaced, ridge-shaped flow disruption elements secured to the vertical side walls of the screening apparatus and a plurality of deflector elements disposed alo... | 06/27/1978 |
| 4047913 | Dust collector for dental technician A collector of dental scrapings and dust for use by a dental technician. The collector consists of a main housing which is provided with a dust inlet at the lower portion of its front side and which has an open rear side normally closed by a filtering cov... | 09/13/1977 |
