Abstract: A screening apparatus includes a vibrating screen assembly that includes a screen and a vibrating mechanism operable on the screen to cause vibration of the screen, the screen having a feed end and a discharge end. At least one shield member is positioned on the screen and is configured to cover part of the screen between the feed end of the screen and a position intermediate the feed and discharge ends of the screen, such that particulate material for screening by the screen can be fed on to the, or each, shield member, the, or each shield member being positioned on the screen so that a vibrational pattern of the screen is imparted to the shield member. An adjustment mechanism is operatively engaged with the, or each, shield member to adjust a position of a discharge end of the, or each, shield member relative to the discharge end of the screen.

Abstract: A screening arrangement including two side walls, each having an inward facing side and an outward facing side, and a screen holder arrangement extending between the inward facing sides of the side walls for use in connecting a first and a second screening element. The screen holder arrangement includes a first screen connector and a second screen connector. The first screen connector includes a pivotable element arranged to pivot about an axis that is parallel with a longitudinal extension of the first screen connector. The pivotable element includes a connection portion arranged to hold one end of the first screening element. The pivotable element is arranged to pivot between a first position and a second position, where the pivotable element is arranged such that when it is in the second position and a screen is connected to the pivotable element, particles larger than a predetermined size are prevented from passing between the first and second screen connectors.

Abstract: The present invention provides a three-degree-of-freedom hybrid vibratory screening mechanism, a control method thereof, and a harvester. The three-degree-of-freedom hybrid vibratory screening mechanism comprises a frame, a vibrating screen, a first driving mechanism, a second driving mechanism, sensors and a controller; parallel drive of hydraulic motors are used for achieving two-degree-of-freedom rotational adjustment of the horizontal attitude angle and inclination angle of the screen surface of the vibrating screen, and the first driving mechanism drives the vibrating screen to reciprocate in one degree of freedom, so as to realize three-degree-of-freedom vibration adjustment of the screen surface; a vibration parameter control model is established by means of theoretical analysis in combination with experiment.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: A bucket mounted sifter assembly includes a ring that is positionable around a top end of a bucket. A pair of handles is each coupled to the ring for gripping. A first screen is positioned within the ring, and rocks and particulates can be positioned on the first screen. The first screen has openings therein of approximately 0.5 inches in size to facilitate the particulates to fall therethrough while inhibiting the rocks from passing therethrough for sifting the rocks. A second screen is positionable on the first screen and the second screen has openings therein of approximately 0.25 inches in size. Thus, the second screen reduces the size of material that can pass through the second and first screens. A fastener is extendable through the first and second screens when the second screen is positioned on the first screen for releasably coupling the second screen to the first screen.

Abstract: A grain pan for a combine harvester comprises a plurality of grain pan members with a closed surface grain contacting surface adapted to engage the harvested crop. More than one of the grain pan members are grain pan members comprising a first connection element and a second connection element, the first connection element being adapted to effectuate a detachable connection with the second connection element of another grain pan body member and vice versa. The grain pan members are detachably connected to each other, one behind the other via their respective first and second connection elements, in a direction substantially parallel to the main direction of grain transportation.

Abstract: A shaker screen for attachment to a bed of a shaker includes a screen frame having at least one mesh screen attached to the top side of the screen frame, wherein the screen frame is preferentially bowed prior to attaching the mesh screen to the screen frame.

Abstract: A screening apparatus includes a plurality of spaced apart parallel beams and a plurality of screen panels mounted to the beams to form a planar screening surface. The panels are mounted to the beams by fixing members that extend in the longitudinal direction of the beams and that engage side edges of the panels. The fixing members have a pair of upstanding, longitudinal rails that are spaced apart to define a longitudinal gap between them and the panels are mounted to the beams by engagement between side edges of each panel with a rail of a fixing member. The side edges of each panel include an overhang that overlies an upper end of each rail and that extends into the gap between the rails. The rails and the overhang include locating gaps to receive a locking member to locate panels relative to the fixing members.

Abstract: A screen and rotor assembly is provided having a rotor of cylindrical shape having a plurality of toolholders in a preselected spaced pattern about an outer surface of the rotor, cutting tools connected to the plurality of toolholders and a screen positioned adjacent the rotor in close tolerance to the cutting tools. The screen has a plurality of transverse extending screen segments defining a plurality of apertures therebetween wherein the apertures form rows in a circumferential direction about the rotor. The cutting tools are centered relative to one or more of the apertures in an axial direction of the rotor. A path of the cutting tools aligned with respect to a row of the apertures extending in a circumferential direction.

Abstract: Screen assembly for a vibrating separator, the screen assembly including a frame having a pair of parallel opposed sides and a pair of parallel opposed ends, a convex underside of the frame, a reverse-crowned top side of the frame opposed to the convex underside, and at least one screen cloth layer fixed to the top side of the frame for separating solid materials from liquids, where the deck of the vibrating shaker has a profile which is substantially planar or crowned.

Abstract: A gasket for aligning and sealing a screen in a round separator includes a deformable annular wall having a first lobe at a top end, a second lobe at a bottom end, an exterior surface, and an interior surface from which an upper lip and a lower lip project inward to generally define a U-shaped channel, wherein the deformable annular wall, the upper lip, and the lower lip together have a pi-shaped cross-section.

Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.

Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.

Abstract: A compact mobile variable angle vibrating screen with a suspension and dampening system configured to rapidly accommodate variable angles and exhibit acceptable vibration levels; especially during power up and power down surge vibration at the variable angles. The system comprises a group of bi-directional dual pivot leg vibration damper mechanisms, including nesting tubes, one with holes for receiving pins and the other with a semi-circular cutout at the bottom edge.

Abstract: A shaker screen comprises a frame that has a plurality of opposing sides. The shaker screen also comprises a screen assembly attached to the frame. In addition, each side of the shaker screen comprises a tubular member having an inner edge, an outer edge, and defining a central axis. Further, a horizontal plane intersects the central axis, the outer edge, and the inner edge of each side.

Abstract: A particle size separator includes an upper separator frame, a lower separator frame, a screen disposed between the upper separator frame and the lower separator frame, a large size particle outlet having an inlet disposed below the screen, a small size particle outlet disposed in the lower separator frame and a combined baffle and seal unit disposed in an opening in the screen. The unit has a seal face configured to sealingly engage the inlet of the large size particle outlet. The unit has a baffle configured to constrain movement of particles on an upper surface of the screen into the inlet. The baffle is configured to sealingly engage an interior wall of the upper separator frame.

Abstract: A clamp is described and which includes a base portion, a handle which is affixed to the base portion, a moveable clamp portion which is individually pivotally attached to the base portion; a pair of force transmitting couplings pivotally attached to the handle, and the movable clamp portion; and an elongated resilient biasing member with a distal end, and which is mounted on the movable clamp portion, and which is further operable to engage an adjacent object of interest and hold it in a given orientation relative to a vibratory conveyor.

Abstract: A screening panel and screening arrangement are provided for screening materials. The screening panel includes a peripheral frame having a first side frame member and an opposing second side frame member defining an opening therebetween. Further, the screening panel includes a plurality of spaced elongated screening ribs defining a screening surface of the screening panel. The screening panel includes a one or more sets of screening ribs that extend continuously across at least a portion of the screening surface of the screening panel in a non-parallel direction relative to a flow direction of material in the screening arrangement.

Abstract: There is provided a plug (1) for repairing a sifting or filtering screen, the plug having at least one line of weakening (5) which can be ruptured whereby the plug has a plurality of possible plug sizes so that the plug is capable of plugging at least two different sizes of cell of the screen. Each possible plug size has a seal (2) extending around the complete periphery of the chosen plug size, in use the seal serving to engage and seal against the screen in order to plug a cell aligned with a damaged area of the screen.

Abstract: A seal can have a middle portion, an upper lip, and a lower lip. The upper lip has a configuration with an upper end portion, an upper top portion, and an upper bottom portion with a void space defined in part by the upper end portion, the upper top portion, and the upper bottom portion. The lower lip can have a configuration with a lower end portion, a lower top portion, and a lower bottom portion with a void space defined in part by the lower end portion, the lower top portion, and the lower bottom portion. A middle portion connects the upper lip and the lower lip.

Abstract: A support structure for supporting screening media in a vibrating screen. The support structure is received on longitudinal beams of the vibrating screen. The support structure is formed of fixation strips having fixation parts, on which fixation parts carriers are received. The fixation strips and carriers are placed perpendicular to each other.

Abstract: A screen panel for mining and quarrying industries adapted to be mounted on a screen deck including at least a screening portion having one or more rider bars and a bottom reinforcement portion, the screen panel being designed such that the rider bars are adapted to be replaced from the screening portion as and when required. The rider bars are attached to a portion of the screening portion and/or the reinforcement portion by button type snug fitting.

Abstract: The invention relates to a screen frame adapted for use in a shaker to separate solids from a liquid/solid mixture and to which woven wire mesh is to be attached, comprising an outer perimeter and a plurality of plastics ribs extending between opposing regions of the perimeter, the plastics ribs together forming an upper face and a lower face, wherein the frame further comprises at least one metal rib extending between opposing regions of the perimeter and extending from the upper face to the lower face, and to a shaker comprising at least one such screen frame.

Abstract: A compact mobile variable angle vibrating screen with a suspension and dampening system configured to accommodate variable angles and exhibit acceptable vibration levels; especially during power up and power down surge vibration at the variable angles. The system comprises a group of bi-directional dual pivot leg vibration damper mechanisms which are effective only during times of excessive vibration such as during the power up and power down vibration surges.

Abstract: A screen deck assembly has an elongated connecting member for securing screen panels to a vibratory machine. The connecting member has a first end and a second end, a body, a transverse arm contiguous with and generally perpendicular to the body, and a radial dome top extending above the transverse arm such that a locking channel is formed between the transverse arm and the radial dome top. A screen, which has a locking profile that corresponds to the locking channel in the connecting member, is detachably secured to the connecting member by sliding or pressing the locking profile into the locking channel.

Abstract: A screen retainer having adjustable tensioning includes a bushing and a tensioning device. The bushing has a center and a thickness that varies radially about the center. The tensioning device includes a surface adapted to receive the bushing, a spring, an engagement member, and at least one screen contact surface. The engagement member is coupled to the tensioning device and is adapted to engage the bushing. The engagement member can be eccentric with respect to the center of the bushing in an installed configuration. The at least one screen contact surface is adapted to engage and place a compressive force on the screen when the spring is placed in compression by an exertion of force by the engagement member on the bushing. The compressive force placed on the screen can be varied based at least in part on a rotation of the bushing on the surface.

Abstract: An apparatus includes a vibratory separator, a screen support coupled to an inner surface of the vibratory separator, a screen having a first side with a sloped edge and a second side, the second side having a sloped edge, a screen retainer coupled to the vibratory separator, a wedge retainer coupled to a sidewall of the vibratory separator opposite the screen retainer, and a wedge having a first surface configured to engage the wedge retainer and a second surface configured to engage the a sloped edge of the second side of the screen. A method includes disposing a screen on a screen support in a vibratory separator, engaging a first side of the screen with a screen retainer coupled to the vibratory separator, and applying at least one of a downward vertical force and a lateral force to a second side of the screen with a clamping apparatus.

Abstract: An apparatus, method, and system are provided for separating material. In some embodiments the separator may include a deck. The deck may accept the material to be separated at a feed end and may provide separated output material at a discharge end. The flow of the material along the deck from the feed end to the discharge end may define a feed direction. The deck may be subject to a vibration or conveyance aligned with the feed direction. The deck may include riffles or corrugations. The riffles may be oriented at an angle relative to a direction of the vibration or conveyance, or at an angle relative to the feed direction. The deck may be subjected to an end-to-end elevation or slope. The end-to-end slope may be positive/downhill, negative/uphill, or zero.

Abstract: The invention concerns a spiral module (1) for a trommel screen comprising a flat part (5) that transports ore and that is designed as a product that becomes worn, with an elastic cladding (27) that functions as wear lining, intended to interact with the charge for the transport of the charge forwards on a sieving deck (2) that is a component of the sieving drum, mounting fixtures (9, 9?) intended for coupling with hole openings (3) in the sieving deck and supporting the part that transports ore directed in towards the central axis of the sieving drum.

Abstract: A screen system having a plurality of screen elements that can be readily removed and replaced to vary one or more characteristics of the screen surface formed by the screen system. The screen system includes a support system for supporting at least one screen element to prevent deformation of the screen element that typically would occur due to the insufficient structural stability of the at least one screen element relative to the weight of the product being screened. Preferably, the support system includes one or more support elements that can be readily and easily installed and removed from the screen system. The support system is preferably configured to permit the one or more support elements to be positioned at different locations in the screen system. Preferably, the support system is configured to permit a variety of different support elements to be used to allow a greater variety of screen elements to be used.

Abstract: The invention relates to a screen frame adapted for use in a shaker to separate solids from a liquid/solid mixture and to which woven wire mesh is to be attached, comprising an outer perimeter and a plurality of ribs extending between opposing regions of the perimeter, the ribs defining an upper horizontal face to which a screen is to be attached, wherein at least one rib extends downwardly from the upper face at an angle off set to vertical, and to a shaker comprising at least one such screen frame.

Abstract: Mechanical separators and screening machines, and methods for flexible sieve mat screening are disclosed. In an example configuration, a flip-flow type flexible mat screening apparatus is provided with optimized relative elevation positions for adjacent pairs of first and second mat supports. In one configuration, a portion of the first mat supports is arranged at a lowered or offset position relative to adjacent second mat supports.

Abstract: A screening apparatus includes beams and screen panels forming a broad screening surface. Each panel is mounted to a pair of beams along opposite side edges to bridge between two adjacent beams. The panels are mounted to an upwardly facing edge of the beams by elongate fixing members extending in the longitudinal direction of the beams. The fixing members engage opposite side edges of the panels and include a pair of projections that extend into openings provided in the edge of the beams. Each projection is engaged by a locking clip to prevent release from the openings. The openings into which the projections extend are of greater diameter than the outside diameter of the projections providing a loose fit within the openings, to allow movement of the fixing rails and the screen panels before the projections are engaged by a locking clip.

Abstract: A method and apparatus for separating material, particularly excavated material is presented. The method and apparatus utilize a releasable and interchangeable screen assembly which is positioned on top of a frame having a slanted grate. The screen assembly includes bar members which traverse the top of the screen and inverted hook members attached to a top surface of the bar members to enable an equipment bucket to engage the inverted hook members in order to lift and move the screen assembly.

Abstract: An ore screening deck frame system which consists of a machine frame having a machine attachment portion and a panel attachment portion having holes spaced along the length there of and a cover which is adapted to extend parallel to the panel attachment support portion has dependent edge skirts that depend below the surface of the panel attachment support portion and also has dependent tubular bosses spaced to fit in the holes of said panel attachment support portion. The frame is made from an inverted L section steel frame member with the upper flange providing the panel attachment support portion. The cover is molded from polyurethane or rubber and encloses the upper flange. The tubular bosses extend from recesses in the surface of the cover and the recesses incorporate an annular shoulder that corresponds to the top of the tubular bosses. The tubular bosses are adapted to receive fastening pins that extend into the bosses and end below the lower surface of the upper flange.

Abstract: A method and apparatus for separating material, particularly excavated material is presented. The method and apparatus utilize a releasable and interchangeable screen assembly which is positioned on top of a frame having a slanted grate. The screen assembly includes bar members which traverse the top of the screen and inverted hook members attached to a top surface of the bar members to enable an equipment bucket to engage the inverted hook members in order to lift and move the screen assembly.

Abstract: The present disclosure is generally directed to vibratory separators that are used for processing drilling fluid, and in particular, vibratory separators that utilize electro-magnetic clamping apparatuses for attaching screen assemblies to a basket assembly. In one exemplary embodiment, an illustrative vibratory separator is disclosed which includes, among other things, a basket assembly having at least one screen support, and at least one screen assembly that is adapted to be releasably secured to the at least one screen support. Additionally, the disclosed vibratory separator also includes an electro-magnetic clamp apparatus that is adapted to releasably secure the at least one screen assembly to the at least one screen support when the electro-magnetic clamp apparatus is energized to a magnetized state, and to release the at least one screen assembly from the at least one screen support when the electro-magnetic clamp apparatus is de-energized to an un-magnetized state.

Abstract: Methods and apparatus for vacuum operated sorting. The apparatus may include a plurality of casing members each having a passageway with a filter member across the passageway. The casing members may be removably coupled to one another in a desired order and/or quantity and attached to a vacuum source to provide sorting of objects such as beads into a plurality of size ranges.

Abstract: A shaker screen for attachment to a bed of a shaker includes a screen frame having at least one mesh screen attached to the top side of the screen frame, wherein the screen frame is preferentially bowed prior to attaching the mesh screen to the screen frame.

Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame is a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by rigid metal members which extend orthogonally between hollow box-section members which define a sub-frame for reinforcing the four edge regions of the frame. The orthogonal members are secured at their ends to the sub-frame. The ends of the sub-frame members are joined at the four corners of the sub-frame. In this way not are only the edge regions of the frame reinforced internally but so also are some of the orthogonally intersecting ribs, so as thereby to produce a rigid frame for the screen.

Abstract: A screen clamp (400) including a track (402) configured to secure a shaker screen (420) to a shaker, the track including an angled surface configured to contact a corresponding beveled edge of the shaker screen, the screen clamp further including an upper retainer (404) configured to extend from an inner wall of the shaker over at least a portion of the shaker screen.

Abstract: A method and apparatus are disclosed for screening materials. A vibratory screening machine includes a first frame and a second frame. The second frame is attached to the first frame by elastomeric mountings. A vibratory motor is configured to vibrate the first frame and the second frame. An attachment arrangement is configured to secure a replaceable screen assembly to the first frame. The replaceable screen assembly is in contact with the second frame such that the second frame excites the replaceable screen assembly.

Abstract: A vibratory screening apparatus includes a screen module. The screen module includes: a panel frame having opposed side portions joined by opposed end portions, the end portions configured to locate the panel frame between spaced panel support rails; at least one intermediate portion extending between the opposed side portions and/or opposed end portions and dividing the panel frame into panel portions; the side portions and the at least one intermediate portion having engagement formations provided on upper surfaces thereof; and at least one pair of screen panels, the screen panels overlying respective panel portions of the panel frame and including complementary engagement formations on an underside periphery thereof for engagement with the peripheral panel engagement formations, defined by the engagement formations of the panel frame and panel support rails.

Abstract: A screening machine of the type used to separate or classify mixtures of solid particles of different sizes includes a fixed base and a perforate screen mounted for movement relative to the base during a screening operation. The screens are pre-tensioned and mounted in a perimeter frame for separating various granular and particulate material. The frame is slid into the side of the machine in a direction parallel with two opposing bevel lips at the ends of the frame which mate in the screening machine with a complementary channel such that when the screen is raised into sealing contact in the screening machine, the bevel ends of the screen panel frame align the screen panel in the machine. The bevels on the screen panel frame provide a positive sealing surface for contact with the adjacent portions of the channel to prevent product from escaping off of the screen during use.

Abstract: A vibratory separator including a screen frame and a screen attachment. The screen attachment including at least one vertically disposed latch on the screen frame, at least one vertically disposed catch on the screen frame, and at least one bearing surface proximate the at least one vertically disposed catch. Additionally, a method of securing adjacent screens including inserting a vertically disposed latch of a first screen into a catch of a second screen, wherein the inserting includes contacting the latch of the first screen with a bearing surface of the second screen adjacent the catch of the second screen. The method further includes forming a planar alignment of the first screen to the second screen.