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| Number | Title | Issue Date |
| 7416085 | Sieving device having beating elements The invention relates to a sieving device provided with a sieving mat (2), which has sieving openings, and with beating elements (7), which are located underneath the sieving mat and which strike against the underside of the sieving mat (2) in o... | 08/26/2008 |
| 7389882 | Multi-hardness composite screen frame A self-cleaning screen assembly for a vibratory separator is disclosed. The self-cleaning screen assembly includes a peripheral frame having a top mounting surface to which at least one screen cloth is affixed and a bottom mounting surface to which a flow through su... | 06/24/2008 |
| 7303079 | Screening element The invention provides a screen which has a screen body (12) and a plurality of ribs which extend across the screen body. Screening apertures (118) are defined in the screen body by the ribs. A reinforcing frame (124) is embedded in the screen b... | 12/04/2007 |
| 7220361 | Torque-limited drive system, method, and apparatus for a fluid screening system A drive system for driving a screen in a fluid screening system comprises an electric gear motor equipped with a mechanical torque limited coupling. The system is sized to provide the torque required to drive the screen throughout the desired speed range, as well as... | 05/22/2007 |
| 7182206 | Screen energizer A screening system including a vibratory screen separator having a resiliently mounted frame with a low frequency vibratory drive coupled to that frame. A taut screen is rigidly mounted in the frame and a vibration transmitter assembly is resiliently mounted to the ... | 02/27/2007 |
| 7017755 | Large coating lump removing device Rear ends of pushing rods 40 are axially connected to a support base 50, which is movably engaged with guide rails 60. A drive unit 70 is disposed to rotatably move wire belts 74 between wheels 73 and 71 at longitudin... | 03/28/2006 |
| 6953122 | Smart screening machine A screening machine that includes a screen having a periphery and a central porous region is provided. A motion amplifier is substantially rigidly attached in direct contact with the periphery of the screen and not in direct contact with the central porous region. A... | 10/11/2005 |
| 6938778 | Smart screening machine A screening machine having a base is provided. A screen is coupled to the base to separate material by size. The screening machine includes a vibration motor having piezoelectric elements and a vibration amplifier located between the piezoelectric elements and the s... | 09/06/2005 |
| 6925961 | Pet litter apparatus A pet litter apparatus has an upper screen to retain litter and debris, a plurality of upper bars, a lower plurality of bars, mechanism for lowering the lower plurality of bars to define spaces for passage of particulate matter between the upper and lower bars, by r... | 08/09/2005 |
| 6913690 | Debris removal system An automatic debris removal system for screening an effluent stream. The automatic debris removal system comprises a support frame positioned proximate the effluent stream, a bucket positionably connected to the frame, and a camming system attached to the support fr... | 07/05/2005 |
| 6726023 | Method and arrangement for cleaning the screening device of a screen The invention relates to a method and an arrangement for cleaning the screening device (2) of a screen (1). The screen (1) comprises at least said screening device (2) which has openings for the separation of particles of different sizes ... | 04/27/2004 |
| 6685028 | Screening equipment A screening panel assembly (10) includes a frame (12) on which a screening panel (14) is supported. The frame (12) has frame members and intermediate members with the panel (14) being secured only to the frame members of the frame (12).... | 02/03/2004 |
| 6609617 | Trommel A trommel for classifying and sorting objects. The trommel is an open cylinder including a drive plate and a feed plate. A series of supporting rods extend between the drive plate and the feed plate. Disposed therebetween is a rod support ring dividing th... | 08/26/2003 |
| 6550620 | Pulp screening device The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation ... | 04/22/2003 |
| 6543620 | Smart screening machine A screening machine that uses electrically controlled transducers to vibrate a separating screen. The transducers can be piezoelectric patches, discrete piezoelectric components, or electromagnetic shakers. Further, the transducers can be coupled directly... | 04/08/2003 |
| 6364118 | Sieve insert for a cylinder sieve machine A sieve insert for a cylinder sieve machine, and especially for a tumbling sieve machine. A sieve insert is provided with the features of a level sieve onto which the material to be sieved is charged, a rebound bottom substantially parallel and arranged a... | 04/02/2002 |
| 6360895 | Separating device for elongate solid pieces A separating device for elongate solid pieces includes a vibrating base with longitudinal grooves having a depth which decreases in a conveying direction, to allow efficient separation of elongate solid pieces, in particular of short pieces of wire, and t... | 03/26/2002 |
| 6305552 | Apparatus for removing matter from tobacco stems An apparatus for separating tobacco stem particles from a mixture containing such particles and tobacco stalk particles obtained in a threshing and separating process employed in a tobacco stemmery includes a hollow drum having a longitudinal axis, the ho... | 10/23/2001 |
| 6220447 | Variable frequency screening apparatus A variable frequency screening device consisting of a pair of spaced elongated side members, a flexible screen surface supported between the side members, a frame member supported between the side members and beneath a flexible screen surface, at least on... | 04/24/2001 |
| 6193073 | Paper stock screening apparatus and method Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor in which a single impulse or foil member is carried or positioned to move along a discrete portion of the screen surface. This arrangement improves efficiency of ... | 02/27/2001 |
| 6129215 | Programmed method of and apparatus for screening debris A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove ... | 10/10/2000 |
| 6105785 | Composite rollers for continuous-belt drilling mud separation unit A pair of cylindrical composite rollers formed of a metallic drum having a thick outer elastomeric layer are mounted transversely in a rectangular frame of a drilling mud separation unit over which a wide endless-loop chain-link belt is driven in a contin... | 08/22/2000 |
| 6095339 | Sieve box screen and pan cleaner A sieve box for a particulate sifter has a pan, a screen, and a number of screen and pan clearing devices. Each device has a first member with fingers engageable with the pan to remove particulates that accumulate on the pan and a second member with finge... | 08/01/2000 |
| 6073773 | Separation of semiconductor material A method and a device for the separation of semiconductor material has the separation procedure carried out on screens coated with ice made of ultrapure water, optionally mixed with particles of semiconductor material. During the separation, the screens a... | 06/13/2000 |
| 6016920 | Programmed method of and apparatus for screening debris A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove ... | 01/25/2000 |
| 6010013 | Universal method of and apparatus for screening debris A universal bar screen cleaner removes debris from a screen positioned in a channel guiding a flow of liquid, solids and the debris. The screen is to prevent the flow of the debris to a liquid treatment basin downstream of the screen. The screen has an up... | 01/04/2000 |
| 5810175 | Adjustable size sorting apparatus for round produce An apparatus for sorting round produce by diameter size using a conventional transport conveyer assembly and including a sorting size adjustment mechanism to automatically adjust the produce sorting size and an anti-pinch mechanism to prevent damaging the... | 09/22/1998 |
| 5799799 | Ultrasonic screening system A device for screening cohesive material, and for eliminating screen blinding, is disclosed. The device includes a transducer for transmitting ultrasonic frequency throughout the screen surface, with the transducer supported independently of the screen in... | 09/01/1998 |
| 5562208 | Tool bit storage case A tool bit storage case includes a front cover preferably hingedly interconnected with a back cover, with the covers being selectively separable and movable toward and away from each other between open and closed positions and together defining a generall... | 10/08/1996 |
| 5476178 | Rotor for pressurized hydrodynamic purification of paper pulp and equipment fitted with this rotor The invention concerns a rotor for the pressurized, hydrodynamic purification of paper pulp from old papers in known purifying equipment comprising a cylindrical screen, characterized in that it comprises a generally cylindrical case extending along a lon... | 12/19/1995 |
| 5385240 | Screening apparatus with adjustable hydrofoil portion Apparatus for screening a papermaking pulp or stock suspension through a stationary cylindrical screen includes a rotating hydrofoil member which has a curved outer or camber surface portion mounted for rotation with the camber surface in a close but spac... | 01/31/1995 |
| 5190160 | Method and apparatus for enhancing transport of knots in a knot drainer A method and apparatus for enhancing knot transport in a knot drainer has a provision for decreasing tangential velocity of the feed slurry in the inlet chamber, a hydrodynamic force reduction provision in the screening chamber, and a provision for increa... | 03/02/1993 |
| 5082553 | Concrete aggregate collecting apparatus An aggregate collecting apparatus. A meter which measures the gross weight of the rotary drum is linked to the speed change gear for the rotary drum in such a manner as to be operationally connectable therewith so that the speed of rotation of the drum ca... | 01/21/1992 |
| 5078878 | Pressure knotter screening apparatus A rotor is disposed concentrically within a cylindrical screen. The rotor carries a plurality of blades in close proximity to the screen to produce hydrodynamic pulses opposing fluid flow to clear the screen. Each blade includes a first portion affixed to... | 01/07/1992 |
| 5071544 | Filtering device for solid wastes A filtering device is provided for solid wastes which includes a rotating drum having longitudinal rows of separating holes located through its outer surface. Plates are located between these rows and extend from the drum at a predetermined height in prop... | 12/10/1991 |
| 4944874 | Centrifugal separator A centrifugal filter separator includes a detachable tubular screen disposed between an annular filter and the inner peripheral surface of a basket, the screen having an annular flange detachably connected to an open end of the basket from the outside of ... | 07/31/1990 |
| 4861462 | Method of forming sieve unit for screening machine A screen unit for a screening machine comprises a screen layer which is bonded to a screen frame spanning an opening thereof. The screen layer is uniformly heated before such bonding is effected so that cooling after bonding generates a tension in the scr... | 08/29/1989 |
| 4832834 | Elastomer sieve screen A process of manufacture of a lattice configurated elastomer screen for classification, screening and washed of fragmented hard stocks of material. The process of manufacture of this lattice screen employs a cutting device with at least one rotary cutting... | 05/23/1989 |
| 4776951 | Screening apparatus for fiber suspensions An improved screening apparatus for fiber suspensions is provided comprising at least one stationary, generally cylindrical screen drum into which the fiber suspension is fed having a central axis and a plurality of apertures through which rejectable mate... | 10/11/1988 |
| 4763794 | Produce sorting apparatus An apparatus for sorting produce by size is disclosed. The produce travels over a series of openings (34), ranging from small to large. The produce falls through the openings and is collected beneath them. The openings are adjustable (91) to handle variou... | 08/16/1988 |
