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| Number | Title | Issue Date |
| 7997416 | Oscillating screen An oscillating screen comprises a screening container inside which a screening means is disposed lying on a determinate screening plane (P), coinciding or inclined with respect to a horizontal oscillation plane (X), and oscillation means to move the screening contai... | 08/16/2011 |
| 7331469 | Vibratory separator with automatically adjustable beach A vibratory separator having a basket for supporting screen apparatus for treating material, the basket pivotably mounted on a base, vibratory apparatus connected to the basket for vibrating the basket, the material forming a pool on the screen apparatus, and a beac... | 02/19/2008 |
| 7302871 | Oscillation generating device The invention relates to an oscillation generating device for use in a soil compacter with a tipping moment compensation device. A second unbalance shaft pair with oppositely rotating unbalance shafts is arranged adjacent to a first unbalance shaft pair as a tipping... | 12/04/2007 |
| 7278540 | Adjustable basket vibratory separator A vibratory separator having a base, a basket movably mounted on the base and for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto, vibratory apparatus connected to the... | 10/09/2007 |
| 7240800 | Vibratory sand reclaiming apparatus having normal and reject modes An attrition mill for reclaiming foundry sand from deposited material having lumps of used foundry sand and included material includes a housing defining a chamber for receiving the lumps of used foundry sand and included material. A base is disposed within the hous... | 07/10/2007 |
| 7182207 | System and process for break detection in porous elements for screening or filtering A detector for breaks in screens and filters employed in material separators includes a transmitter of RF signals and a receiver of RF signals located to either side of a screen. The separator includes a chamber having a barrier to RF signals with a path through the... | 02/27/2007 |
| 7025210 | Method and apparatus for attenuating sound from vibratory screening machines A method of attenuating the sound emanating from a bank of a plurality of vibrating screens of a plurality of vibrating screening machines including the steps of providing a master pulse of known phase and frequency, comparing the phase and frequency of a plurality ... | 04/11/2006 |
| 6997325 | System and process for break detection in porous elements for screening or filtering A detector for breaks in screens and filters employed in material separators includes a transmitter of RF signals and a receiver of RF signals located to either side of a screen. The separator includes a chamber having a barrier to RF signals with a path through the... | 02/14/2006 |
| 6918492 | Baffle assembly for a sealed shaft on a vibratory apparatus A sealed wheel case for use on a vibrating aggregate processing device comprises a housing sized to hold a rotatable wheel supported on a shaft, the housing having a base, a peripheral sidewall, and a cover. The cover includes an aperture adapted to receive therethr... | 07/19/2005 |
| 6679385 | Motor control system for vibrating screen separator A vibrating screen separator. The vibrating screen separator may be operated in a linear, an elliptical, or in a transition from elliptical to linear modes of operation. In the linear mode of operation, the screen separator moves along a reciprocating str... | 01/20/2004 |
| 6669026 | Portable screening plant with displaceable eccentric A vibration-reducing eccentric weight system mounted to the driveshaft of a screen box in a portable screening plant with the eccentric weight system's center of gravity on the driveshaft's axis of rotation. The eccentric weight system includes a weight t... | 12/30/2003 |
| 6513664 | Vibrating screen separator A vibrating screen separator. The vibrating screen separator may be operated in a linear or elliptical mode of operation. In the linear mode of operation, the screen separator moves along a reciprocating straight line path, and, in the elliptical mode of ... | 02/04/2003 |
| 6401933 | Displaceable eccentric for vibratory screen A vibration-reducing eccentric weight system mounted to the driveshaft of a screen box in a screening plant with the eccentric weight system's center of gravity on the driveshaft's axis of rotation. The eccentric weight system includes a weight that is ra... | 06/11/2002 |
| 6386375 | Lubrication system for vibrating flat screens A vibrating screen supported by springs and vibrated via rotating gear sets. The gears are provided with off center weights synchronized to produce angularly directed vibration for moving the material from end to end on the screen. The gears are lubricate... | 05/14/2002 |
| 6382424 | Portable screening device and method A truck mounted particle screener for mounting atop the dump body of a dump truck having a support frame, a screen deck, a plurality of spring assemblies connecting the screen deck to the support frame, and a vibrating mechanism attached to the screen dec... | 05/07/2002 |
| 6349834 | Vibratory screen separator A vibratory screen separator having a resiliently mounted frame with a screen mounting to receive screens for material flow thereacross. Eccentric weight systems are rotationally mounted with effective axes of eccentric force coincident. The weight system... | 02/26/2002 |
| 6082551 | Vibration-type screening machine A vibration-type screening machine capable of screening loose material with a significantly enhanced efficiency includes a stationary base frame, a pair of upstanding side plates supported on the stationary base frame through spring suspensions and dispos... | 07/04/2000 |
| 6029822 | Drive system for a vibratory screening plant A vibratory screening device includes a frame and a screen, supported by the frame, for separating undersize and oversize material. A vibrating device, coupled to the screen includes a first output shaft with an axis of rotation that oscillates relative t... | 02/29/2000 |
| 6003679 | Sieving device with duel independent frequency input A sieving device includes a sieve having a base, a drum and a main rim. A screen assembly having a mesh screen and a screen frame extending around a periphery of the mesh screen is resiliently mounted within the main rim. A low frequency vibrational drive... | 12/21/1999 |
| 5984107 | Vibratory drive for a screening machine A vibratory drive for use with a screening machine for draining and/or sizing of grain solids, the drive having two eccentric shafts which are driven synchronously and in counterrotation and which have different unbalanced masses 7, 8. The eccentric shaft... | 11/16/1999 |
| 5951864 | Screening system A vibratory separator having a resiliently mounted housing with a vibratory drive. A screen extends across the housing and a cover is positionable over the screen. The screen includes a discharge port therethrough aligned with a discharge passage for remo... | 09/14/1999 |
| 5921401 | Mobile screening apparatus A mobile screening apparatus can be vibrated by two similarly-constructed vibration units that are mounted on or near the front and rear walls of the box that contains the vibrating screen assembly. Each vibration unit comprises an hydraulic motor having ... | 07/13/1999 |
| 5896998 | Vibratory screening apparatus A vibratory screening apparatus has two vibrator motors (19, 20, 19', 20') having respective out-of-balance weights arranged to produce substantially linear vibratory movement when, in use, these motors (19, 20, 19', 20') are running in mutually opposite ... | 04/27/1999 |
| 5816412 | Screening systems and methods for screening particulate material The subject invention relates to a screening system, preferably a finger screening system, for screening particulate material. The screening system for screening particulate material comprises a screening assembly including a housing. A plurality of scree... | 10/06/1998 |
| 5749471 | Vibrating screen A vibrating screen for the sizing of granular material such as gravel, sand, crushed stone, etc., having a frame (1) and a screen body (2) supported on springs (6), directional oscillating movements being imparted to the screen body by a motor powered vib... | 05/12/1998 |
| 5685982 | Vectored thrust shale shaker A vibratory vectored thrust shaker for separating solid materials from fluids has a base frame and a screen bed support frame carrying a mesh screen supported horizontally above the base frame by resilient supports. An eccentrically weighted vibratory sha... | 11/11/1997 |
| 5683580 | Nonuniform forward elliptical motion end feed separator A vibratory deck of an end feed separator transfers material in a linear direction from the feed end to the discharge end of a screen mounted on the separator frame. A pair of rotary eccentric vibrators is independently mounted in mirror relationship on o... | 11/04/1997 |
| 5666852 | Jointed weight for a vibratory apparatus A counterweight is freely pivoted on a rotatably driven unbalanced eccentric weight member such that at start up the counterweight does not add materially to the unbalance created by the eccentric weight member and such that as the motor attains operating... | 09/16/1997 |
| 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 |
| 5443163 | Apparatus for screening granular materials This invention concerns an apparatus and method for separating particles according to size, shape, and/or density. The apparatus includes a single vibrating mechanism and a frame forming a vibrating space having classifying elements in the form of cloths,... | 08/22/1995 |
| 5328036 | Vibratory screening apparatus There is disclosed a vibratory screening apparatus comprising a frame having a pair of opposed screen frame sides, a multi-deck screen mounted on the frame sides, and a shaft-driven vibratory mechanism coupled with the screen in order to impart vibration ... | 07/12/1994 |
| 5301814 | Increasing the relative motion of a screen deck The screening efficiency of a gyratory screening machine, of the type having a moving base, is significantly increased by mounting to the base a spring/mass system which is tuned so that operation of the machine drive produces amplified movement of the ma... | 04/12/1994 |
| 5265730 | Vibratory screen separator A vibratory screen separator having a base, resilient mountings and a separator frame. Screens are fixed in the separator frame. Rotary eccentric vibrators are positioned on each side of the frame at the center of mass and inclined both in the direction o... | 11/30/1993 |
| 5232099 | Classifying apparatus and method Classifying apparatus and methods are disclosed for the classification of extremely small solid particles of 18 mesh or less in which low frequency, high amplitude vibrations are imparted to a screen simultaneously with high frequency, low amplitude vibra... | 08/03/1993 |
| 5232098 | Screening apparatus for efficiently separating coarse material from finer material The screening apparatus for efficiently separating coarse material from finer material, comprises a frame having a lower portion for resting on a surface, and a higher portion; a vibrating screen unit including a first material separating screen having a ... | 08/03/1993 |
| 5220846 | Asymmetric mechanical vibrator with external setting for vibrating screens and other equipment An asymmetric mechanical vibrator with external adjustment for vibrating screens and other equipments having a bearing housing fixable to a sidewall P of the equipment and supporting through bearings a central portion of a shaft, which has an end portion,... | 06/22/1993 |
| 5084176 | Vibrating filter A vibrating filter has a housing, top and bottom plates spaced vertically in an upper portion of the housing and defining an outlet chamber therebetween, at least one filter element dependent from the bottom plate into a filter chamber defined in the hous... | 01/28/1992 |
| 5037535 | Superposed two frame system elastic screening machine having independent oscillating drives for each frame system In a screening machine comprising two screening frames (13 and 31) each having mutual oppositely located feed and discharge ends on which there is arranged an elastic screening lining (54) and which are caused to oscillate by independent oscillating drive... | 08/06/1991 |
| 5003833 | Gyrating drive for particle screening machine A drive for a particle screening machine or the like in which a bearing support plate is attached to two side walls of the screening machine. A stationary bearing hub is mounted on the support plate in registration with an opening through the plate, and t... | 04/02/1991 |
| 4978488 | Concrete block molding machine having continuously driven vibrating shaft mechanism which can be programmably vibrated and method of programmably vibrating such machines A concrete block molding machine has a vibratible mold box incorporating at least one molding cavity for a cement mixture which is to be densified in the cavity. A continuously driven shaft assembly mounts an eccentric fixed portion and a circumferentiall... | 12/18/1990 |
