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: An apparatus comprising a chamber having a smooth inner surface, the chamber including a first hemisphere and a second hemisphere, wherein the first hemisphere is removably attached to the second hemisphere; a plurality of apertures located on a bottom center surface of the second hemisphere; a plurality of nozzles, each of the plurality of nozzles having an inlet and an outlet, wherein each of the outlets penetrate the plurality of apertures without intersecting the smooth inner surface; an air compressor; a compressed air regulator; an air hose connected to each of the inlets of the plurality of nozzles and the air compressor.

Abstract: In a sieve apparatus, a housing (1) is provided with an inlet section with a feed inlet for material to be sifted and a discharge section including at least one outlet. Means are provided for vibrating the screen mesh. The housing has two substantially vertical side walls (2), and a screen mesh (5) having at least one side edge (51) is supported by a support structure (6, 7) connected to the respective side wall (2). The support structure includes a support element (7) along each side wall and adapted to support the screen mesh (5). Each support element is provided as a support profile (7) having an inclined support surface (73) for the side edge (51) of the screen mesh and constituting a V-shaped structure protruding into the housing, said support surface (73) meeting a lower surface (74) in an apex (75) located at a distance from the side wall (2) inside the housing (1). Specifically, each V-shaped support profile (7) is formed as an integral part of the respective side wall (2).

Abstract: Disclosed may be an apparatus and related methods for simply and inexpensively extracting the psychoactive resins of cannabis skuff. Further disclosed may be apparatus and related methods of extracting cannabis resins without the drawbacks of heretoforknown apparatus. Yet still disclosed is apparatus and methods for using more of a harvested cannabis plant. In a preferred embodiment, the apparatus comprises: a tumble box with a door with a plurality of screened traps; and, a motor for rotating the box around an axis, and, shaking the tumble box along the axis. The more specific aspects of the disclosed apparatus are further described with reference to the drawings.

Abstract: A drive device is provided for a screening body of a screening machine, in particular for mineral materials for crushing, such as oil sand, with a drive motor, a synchronous transmission gear which is operatively connected thereto and has at least two output shafts which rotate in pairs in antiphase at the same rotation speed with respect to one another. The drive motor and the synchronous transmission gear are mounted in a stationary manner, separately from the screening body, at the side alongside the screening body, and do not oscillate therewith. Each output shaft has a single associated horizontal shaft which has unbalance elements, and which is connected to the output shaft by means of a rotationally rigid universally jointed shaft and is arranged with its axis parallel to the adjacent shaft and transversely with respect to the conveying direction of the screening body.

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 system and method for separating mixed materials employing an angled screen that is moved through a vertically oriented circular path by a single drive element.

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: A sifting screen shaker assembly defined by a generally vertical hollow frame includes a pivotally supported yoke at its base provided with a foot pedal at its apex to articulate a pair of vertical links that are confined in their motion by the convolutions of shaped apertures, with the ends of the links articulating a screen assembly supported within a hinged tray above a collection receptacle in which the sifted particulates passed by the screen assembly are collected while additional particulates are added. The particulates accumulated in the screen assembly are then periodically discarded by articulating the tray around its hinge.

Abstract: A roller-type grader having adjustable, widening gauging passages between consecutive rotating grader rollers and an associated method for adjusting the gauging passages. A drive rotates all the rollers in the same direction on their axes. The ends of the rollers at each end are rotatably and pivotally suspended from adjustment yokes that are movable laterally in unison along tracks by an adjustment shaft. Positioning the yokes positions the ends of the rollers relative to each other. Minimum and maximum widths of the gauging passages at opposite ends of the rollers are adjusted by rotating the adjustment shafts.

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 perforated plate for use in a high g vibratory device in the separation of solid particles within a slurry. The plate is rigid and has perforations with a span of no greater than 3/16 inch.

Abstract: An extra-large vibrating screen with duplex statically indeterminate mesh beam excitation body and plate type combined bearing beam comprises plate type flat and rigid statically indeterminate combined bearing beam (12) arranged in a screen box (1), a plurality of Y-shaped statically indeterminate combined reinforcing beams (5) arranged on the side plates (3) of the screen box alternately, duplex statically indeterminate supporting plates (22) linking a plurality of mesh beams (21) to the statically indeterminate connecting plate (4) and the side plate (3) so as to form a container made of a beam system, the vibration exciters (10) in the statically indeterminate mesh beam unit comprising eight sets of vibration exciters, which are aligned in pair horizontally and linked together through universal couplings (9), and connected to the duplex statically indeterminate mesh beam excitation body (11) to form a highly rigid integral vibrating assembly.

Abstract: A shale shaker comprises a base and at least one deck coupled to the base. The deck is configured to support a mud screen. The shake also comprises a support frame coupled to the base and further includes an asymmetric planetary drive assembly coupled to the support frame for vibrating the support frame and the deck. The asymmetric planetary drive assembly comprises a flywheel gearbox a planetary gear and at least one eccentric weight coupled to the planetary gear. The planetary gear comprises a central axis bore that receives a planetary gear shaft through a central hole in the planetary gear. The gearbox receives a main shaft through a central hole in the flywheel gearbox. The planetary gear shaft is offset from the main shaft. The eccentric weight is coupled to the planetary gear offset from the main shaft.

Abstract: An apparatus and a method of screening a material containing a solid and fluid where the material is placed on an upper side of a screen element and the material is at least being acted on by vibrations produced by at least one acoustic sound source. The at least one acoustic sound source is arranged to transmit pressure waves to at least a portion of an underside of the screen element.

Abstract: The present invention provides a screen assembly having a base, a screen box having a screen medium and a pair of mutually opposed bearings, a shaft having a pair of eccentric journals that are rotatably supported in the respective pair of mutually opposed bearings, and at least one articulated suspension assembly having a first leg having a first torsion joint and a second torsion joint, a second leg having a third torsion joint and a fourth torsion joint, and a third leg having a first end pivotably secured to the second torsion joint and a second end pivotably secured to the third torsion joint, for pivotally interconnecting the screen box and the base to dampen vibrations.

Abstract: A drive device is provided for a screening body of a screening machine, in particular for mineral materials for crushing, such as oil sand, with a drive motor, a synchronous transmission gear which is operatively connected thereto and has at least two output shafts which rotate in pairs in antiphase at the same rotation speed with respect to one another. The drive motor and the synchronous transmission gear are mounted in a stationary manner, separately from the screening body, at the side alongside the screening body, and do not oscillate therewith. Each output shaft has a single associated horizontal shaft which has unbalance elements, and which is connected to the output shaft by means of a rotationally rigid universally jointed shaft and is arranged with its axis parallel to the adjacent shaft and transversely with respect to the conveying direction of the screening body.

Abstract: The invention relates to a coating powder sieving device, specifically for a powder paint coating installation, having a screen surface for sieving a coating powder. The screen surface is angular. An ultrasonic probe excites vibrations in the screen surface wherein the vibrations in the screen surface occur substantially in a direction perpendicular to the screen surface. A powder fluidization hopper incorporating the coating powder sieving device and a powder coating installation including plural powder fluidization hoppers are also disclosed.

Abstract: A sifter apparatus is provided that comprises a body having a crank fastener and a mesh sifter support, a lid configured to be attached to the body, a crank configured to be coupled to the crank fastener, a wire structure configured to be coupled to the crank, a bottom configured to be attached to the body, and a mesh sifter configured to be supported by the mesh sifter support.

Abstract: A screening machine includes wall 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: The aim of the invention is to provide a sieve jigger comprising a sieved-product rocker that can be pivoted upwards and downwards, whose lifting displacement and/or lifting frequency can be controlled beyond previously accepted limits and which does not require vibration dampers that are subject to wear. To achieve this, the sieved-product rocker is operated by means of a lifting and braking cylinder comprising an integrated measuring device for the displacement of the cylinder piston and a working chamber, to which a hydraulic-oil supply and evacuation conduit is connected, said conduit containing an integrated proportional control valve. The lifting and braking cylinder interacts with the proportional control valve by means of a displacement sensor and a governor in order to control the displacement upwards and downwards and thus the lifting height and/or the lifting frequency of the rocker.

Abstract: A vibratory separator including a frame, a screen configured to connect to the frame, a first actuator coupled to the frame, and a second actuator coupled to the frame, wherein the first actuator imparts a high frequency motion to the frame, and wherein the second actuator imparts a low frequency acceleratory motion to the frame is disclosed. Also, a method for processing drilling waste including imparting a low frequency acceleratory motion to a frame of a vibratory separator and imparting a high frequency motion over the low frequency acceleratory motion is also disclosed.

Abstract: 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 of vibrating screens with the known phase and frequency of said master pulse, and adjusting the phase and frequency of said bank of plurality of vibrating screens so that the waveforms produced thereby tend to cancel each other. An apparatus for implementing the method is also disclosed.

Abstract: A sieving device having a mesh screen detachable from a frame body is capable of easily removing particulate material remained on the mesh screen and cleaning of the mesh screen and being installed even in a confined space requiring a sanitary condition. The particulate material sieved through the mesh screen is prevented from getting out of a collecting container or scattering around. With a vibration generating means in the sieving device, sieving vibration can be efficiently produced with a relatively small power with preventing coagulation and agglomeration of the particulate material. By corrugating the bottom of the mesh screen, the efficiency of sieving the particulate material be increased remarkably.

Abstract: The invention provides a vibrator assembly (5) having a pair of vibrators (1) held in spaced apart relationship by a frame (10), screen assembly (1), having a screen (2, 3) extending between a pair of side plates (4), is securable between the vibrators (11) to the frame (10). The frame (10) transmits loadings transverse to the side plates (4) directly between the vibrators (11) to avoid undesirable stresses being absorbed by the screen assembly (1).

Abstract: An ultrasonic sieving apparatus (10) is described which comprises a de-coupler (18) for enabling a combination of a transducer (T) and a first resonator (16) to be supported with respect to a sieve which includes a separation medium (14) provided in a frame (12) such that vibrations generated by the transducer (T) are transmitted to the separation medium (14) via the first resonator (16). The first resonator (16) is of substantially circular cross-section and has first dimensions. The ultrasonic de-coupler (18) which is also of generally circular cross-section and of second dimensions, is connected to and is concentric with the first resonator (16). In use the de-coupler (18) is attached to a bracket (20) adapted to mount the de-coupler (18) onto the frame (12).

Abstract: A screening system having a resiliently mounted housing with a screen extending thereacross. The housing is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is employed to vibrate the screen in the range of 20,000 Hz. The high frequency vibration is generated at the peripheral frame about the screen. The screen may be responsive to the high frequency vibrations in a plate-like manner or as a membrane. With the high frequency drives mounted within the housing, a structure made of a sheet extends from a mounting flange inwardly to a mounting ring supporting the screen and the high frequency drives and inwardly to a collecting system including a trough and a central dome. The center of the dome may be fixed to the screen and include a high frequency drive.

Abstract: A screening system having a resiliently mounted frame with a screen extending thereacross. The frame is vibrated by a low frequency vibratory drive using eccentric weights. About the peripheral frame of the screen, a high frequency drive or drives is employed to vibrate the screen in the range of 20,000 Hz. The high frequency vibration is generated at the peripheral frame about the screen. The screen is responsive to the high frequency vibrations in a plate-like manner rather than as a membrane.

Abstract: A mobile screening apparatus includes a horizontal rotary drum preferably fed by underflow from a prescreening device that is reversible endless belt of screening grizzly bars. The belt reverses for expelling oversize material caught between bars. Force needed to turn the drum is monitored, as a way of controlling drum feeding by the prescreening device, for preventing protracted over-filling of the drum. The screening drum includes an outer peripheral cage of longitudinal bars, at least some of which preferably are movably mounted. A set of wires is circumferentially wrapped about the bar cage, with sufficient flexibility to permit the wires to locally elastically flex away from the bars sufficient to pass slightly oversize material and facilitate cleaning of debris lodged in spaces among the bars and wires. Brushes help dislodge lodged debris.

Abstract: A shale shaker or the like comprises a hollow body having an inlet and an outlet. A screen is mounted generally horizontally in the hollow body between the inlet and the outlet. A motive assembly is operatively connected to the screen for repetitively moving the screen. At least one generally horizontal tube is connected to the screen for movement therewith. A solid weight freely movable longitudinally in the tube automatically adjusts the center of gravity of the attached screen.

Abstract: Sieving apparatus has a piezoelectric transducer directly bonded to a grating (100), the transducer comprising a number of piezoelectric elements (1) sandwiched between first and second bodies (2,3 ). The first body (2) is in two parts (2A, 2B) which are releasably secured together (6, 7), one part (2B) being directly bonded (5) to the grating (100). The arrangement allows use of a transducer with different gratings with different parts (2B) of a first body (2) bonded thereto in order to achieve a required operational mode.

Abstract: Sieving apparatus has a piezo-electric transducer (1) directly bonded to a grating (100), the supply to the transducer (1) being controlled by sensing resonance of the grating (100) and any deviation therefrom and controlling the supply to maintain resonance.

Abstract: A screen filter comprising a plurality of rollers arranged in parallel, spaced relationship with a plurality of carriers positioned between the rollers with the axes of the carriers parallel to the axes of the rollers. An endless wire is wound spirally over the rollers and engages the surfaces of the carriers so as to form a screen. A driving means engages at least one of the rollers for driving the endless wire. The raw material to be screened is deposited onto the screen.

Abstract: A vibratory apparatus for use in association with a vacuum casting apparatus wherein the box containing the sand and casting upon completion of the vacuum casting is moved on track means to a vibrating station where it is lifted off the track, tilted, and vibrated to discharge the sand and separate the sand from the casting.

Abstract: A two-mass heavy duty vibratory machine has a frame in the form of a box-like cage in which a working member, such as a screen, is received. In one embodiment of the disclosure, the frame is resiliently mounted on a stationary support surface and the working member is resiliently suspended from the frame. In another embodiment of the disclosure, the working member is resiliently mounted on the stationary support surface and the frame is suspended from the working member. In both embodiments, an exciter is mounted on the frame at a location outside the frame and spaced from the working member.

Abstract: The invention relates to vibratory material handling apparatus and more particularly to a dual exciter system derive for vibrating the apparatus wherein the exciters are positioned on either side of the center of gravity of the apparatus and direct vibrations at obtuse and acute angles, respectively, through the center of gravity of the apparauts, the arrangement being much whereby the vibratory force exerted by each exciter may selectively be varied so as to cause the apparatus to vibrate vertically, or displaced from the vertical, so as to convey in one direction or the opposite direction. The arrangement is such that the spring system connecting the exciters to the material-handling apparatus acts as isolation springs when the vibration generator associated therewith is inoperative, and as tuned natural frequency systems when the vibrator is actuating.