Abstract: An apparatus that generates vibrational motion is disclosed. The apparatus includes a first mass, a second mass, a drive system, and a control system. The first mass is eccentrically mounted on, and configured to rotate about, a first shaft. The second mass is eccentrically mounted on, and configured to rotate about, a second shaft, with first and second shafts sharing a common axis. The drive system imparts rotational motion to first and second shafts, and the control system controls rotational frequencies, directions, and initial angles of the first and second masses. Linear, elliptical, or circular vibratory motion of the apparatus may be induced by controlling such rotational properties of the first and second masses. The apparatus may include a measurement device that measures angular position and/or velocity of the first and second masses. The control system may control the vibrational motion based on measurements taken by the measurement device.

Abstract: A dryer for material to be dried (T), wherein an air supply channel (4) for supplying a drying gas to the drying region is provided, and at least one exhaust-gas opening (8) is provided for removing the drying gas, wherein the air supply channel (4) is surrounded at a distance by an outer wall (11), which has at least one supply opening (12) and at least one removal opening (13) for the cooling medium (K), wherein between the at least one supply opening (12) and the at least one removal opening (13) a flow section (14) for the cooling medium (K) is formed between the outer wall (11) and the air supply channel (4).

Abstract: There is provided a screen frame adapted for use in a shaker to separate solids from liquid/solid mixture and to which woven wire mesh is to be attached, comprising a plurality of intersecting elongate members (12) defining a plurality of openings (10), or cells, wherein at least one protrusion (26) in the form of an elongate rib extends partway across each opening (10).

Abstract: 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 container with respect to a fixed supporting structure. The oscillation means comprises a first movement unit provided with a first rotary shaft associated with a first eccentric element cooperating with the screening container, and a second movement unit having at least a second rotary shaft provided with a second eccentric element cooperating with the screening container. A transmission means connects the first rotary shaft and the second rotary shaft with each other, so that they have the same angular velocity.

Abstract: A mobile vibrating screen with a readily stowable and pivoting drive system comprising a motor with an attached drive sheave, a belt, a driven sheave and plurality of universal joints which are configured to maintain a connection between the motor and an eccentric weight shaft when said drive system is switched from an operational configuration to a stowed configuration. In an alternate embodiment, some small d parts, e.g. drive shaft, need to be removed and stowed elsewhere on the plant when drive is converted from operation to transport.

Abstract: Apparatus is provided, in or for a screen separator for sieving materials, for clamping one or more sieve screen frames 78 within the confines of a chassis 40 of the separator to prevent egress of material from the separator. The apparatus comprises a sheath 50 extending around and embracing the chassis 40 and one or more expandable elements 66 for urging the sheath 50 against the chassis 40 and the screen frame(s) 78 to impart uniform clamping pressure to the clamped elements. The sheath 50 is designed to provide ease of mounting and release.

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 comprises 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 a structure comprising two spaced apart layers of orthogonal intersecting spaced apart wires, running parallel to the length and breadth of the rectilinear shape of the frame within the ribs to increase their rigidity. The edge regions of the frame are reinforced internally by metal box-section members joined at their four corners and defining perimeter reinforcement, and the ends of the wires are secured to the box-section members.

Abstract: A screening apparatus having a screening box movably mounted on a support member (22) via biasing members (23), the screening box having a pair of opposing side walls (14, 15) and a vibrating arrangement (100) for vibrating the screening box relative to the support member (22). The vibrating arrangement (100) comprising a shaft housing member (42) for housing at least one rotatable shaft (1, 2, 3) and shaft coupling members (41) for coupling the shaft housing member (42) to the opposing side walls (14, 15) of the screening box. A shaft (1, 2, 3) is rotatably housed in the shaft housing member (42). The vibrating arrangement (100) further comprising a throw generating assembly (53) rotatably mounted on both ends of the shaft housing member (42). The throw generating assembly (53) is releasably fixed to the shaft (1, 2, 3).

Abstract: A sifting device including a sieve box (1), which is caused to oscillate using a drive (4), as a fundamental oscillation system having essentially horizontal first transverse carriers (1.3) and a supplementary oscillation system (2), attached to the sieve box (1), having essentially horizontal second transverse carriers (2.3), positioned essentially parallel to the first transverse carriers, which are each positioned between two first transverse carriers (1.3) and are connected thereto by stretchable sieve liner strips (3), with, for two sequential transverse carriers, the transverse carrier closer to the feeding side (A) being higher than the subsequent transverse carrier, which is closer to the discharge side (B), with the sifting device having at least two sections, in which the height difference between the centers of gravity of two sequential transverse carriers (1.3, 2.3) is greater in the particular feeding-side section than in the discharge-side section.

Abstract: A rotatively oscillating separator comprising separating vessels 4 each having cone-shaped separating plate 5 disposed in the vessel, and drive means 6 for rotatively oscillating said separating vessels 4, mixed rice consisting of unhulled rice and unpolished rice being fed onto the separating plates in the separating vessels at a given location to separate the unhulled rice and the unpolished rice from each other, the unpolished rice being discharged through raised peripheral portions of the vessels, and the unhulled rice being discharged through the central bottoms of the separating vessels.

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: 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 straight line path, and, in the elliptical mode of operation, the screen separator moves along an elliptical path. In the transitionary mode of operation, the screen separator is transitioned from movement along the elliptical path to movement along the linear path.

Abstract: An apparatus and method for sizing and separating particles of generally low-density materials includes a stand, a frame movably suspended on the stand by a plurality of suspension assemblies, and an elongated screen box mounted on the frame. The screen box receives material to be processed at an input end and includes openings at an output end for discharging processed material. The frame and screen box are disposed at an incline relative to a horizontal surface on which the stand rests, so that material travels downwardly in the screen box toward the output openings. A vibrator motor is mounted on the frame input end. The arrangement of the motor and suspensions results in imposition of a combination generally circular planar motion to the frame and screen box at the input end and a generally oblong linear reciprocating motion at the central portion and the output end of the apparatus.

Abstract: 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 operation, the screen separator moves along an elliptical path.

Abstract: A structural mount for a vibrator of a screen separator is provided in which the vibrator mounting plate is secured at an angle directly to the basket side wall structure or to a load bearing structure which is parallel and fixed to the basket side wall structure. In a preferred embodiment of the invention, an opening or pocket is provided in the basket side wall to accommodate protrusion of the inward end of the vibrator into or even through the basket side wall. Access to and removal of the cap from the inward end of the vibrator is accomplished in the former case from the inside of the basket and in the latter case from the outside of the basket. The basket side wall reinforcing structure preferably includes a Y-shaped yoke with the mounting plate being fixed proximate the Y-connection point. Transverse reinforcing members of the basket have their ends fixed to the extremities of the Y-shaped yoke.

Abstract: In a screening machine with a three-dimensional oscillating screening movement and a control unit for converting a given vibration level into the required energy supply for the electromagnet, the results of screening analyses are to be reproducible or comparable; to this end it is provided that the control unit (26) is designed for calculating the machine acceleration as a function of the respective determined vibration level and the simultaneously determined frequency value as a control value for the energy supply to the electromagnet and for the setpoint-actual value comparison of the calculated machine acceleration actual value with a given machine acceleration setpoint value and for compensating a determined machine acceleration deviation by adjusting the energy supply to the electromagnet (21) on the basis of the change in the vibration level calculated as a function of the given frequency.

Abstract: The present invention provides an apparatus for retrofitting traditional derrick motor vibrators. In particular, an off-center shaft rotates, shaking a bed in an oscillatory manner. An apparatus of the present invention may be advantageously used to retrofit known shale shakers, achieving significant savings in the cost of repair.

Abstract: 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 mass along at least one of two perpendicular axes on which the base moves. Movement of the mass reduces the net force on the base along the axis on which the mass oscillates. The reaction force of the machine drive on the base along the other of the two perpendicular axes may be offset by a rotary counterbalance operated by the drive. Movement of the base relative to the ground is thereby reduced, and movement of the screen deck relative to ground is increased. This both increases the effectiveness of the screening motion and decreases the total reaction force transmitted through the base.

Abstract: A seed cleaning device includes a frame and first and second screened grids, each of which is pivotably mounted to the frame. Two crankshafts are mounted to the frame and are coupled to one another to remain 180 degrees out of phase with respect to one another. Each of the crankshafts causes a respective one of the screened grids to oscillate, such that the oscillation of the first screened grid is out of phase with the oscillation of the second screened grid.

Abstract: Chip screen whose screen basket has been divided into two basket sections (13, 14) that counter-balance each other and that are interconnected and operated by a vertically positioned revolving machine member, e.g. a crankshaft (15). Part (9) of one (14) of the basket sections is located above, and part (12) of it underneath, the center of cavity of the other basket section (13). Both of the basket sections (13, 14) may be supported by means of two support ropes (18, 19), whereby one support rope (18) of one basket section is connected with one support rope (19) of the other basket section by the intermediate of a balance (20) supported by its articulation point (21).

Abstract: A material treatment apparatus having a bowl or container for the material to be treated. The bowl is suspended by resilient means, and a vertical reciprocating motion is applied to the bowl, the resilient means during the vertical motion imparting a rotary oscillation to the bowl or container.

Abstract: The vertical cylinder screen in a cleaning machine is adapted to be given a rotary motion at oscillating angular velocity. This is obtained with this invention in that the cylinder screen is adapted to be given an oscillatory motion by means of a driven eccentric unit coupled to it and a rotary motion in that the eccentric unit is mounted on a carrier therefor which is adapted to rotate about the center shaft of the cylinder screen.

Abstract: This invention pertains to unidirectional vibration apparatus using resilient shock absorber mounting means to change multidirectional vibration into unidirectional vibration forces. Three embodiments pertain to the use of pressurized air for driving an eccentric weight at a desired speed. One embodiment employs a turbine which is carried between and by resilient disk members secured to mounting rings. A roller is driven by pressurized air and the vibrating apparatus is carried within and by a resilient ring. A ball vibrator also uses a resilient ring as a shock absorber.

Abstract: A vibratory screen apparatus is employed to continuously separate particles of random sizes, such as wood chips, into groups large, medium and small sized particles. A vibratory frame has a horizontal platform driven in vibratory movement to convey particles on the platform to one end of the platform. Upper and lower inclined screens are mounted upon the platform, particles are fed to the upper end of the upper screen which will pass medium and small sized particles passing through the lower screen to the platform. Gravitational movement of particles down the inclined upper screen is delayed by the vibratory movement of the screen; abutment surfaces on the upper surface of the upper screen imparting intermittent upward movement to particles on that surface which resists, but does not overcome gravitationally induced flow of the particles.

Abstract: A method and apparatus for separating entangled parts includes a receptacle container mounted for reciprocating movement in a vertical direction and having a grid structure at the bottom thereof for supporting and separating component parts which are entangled. In order to overcome the unbalance of the reciprocating container or parts bin a counterweight structure is provided which will effectively counteract or neutralize the unbalance created by the reciprocation of the parts bin. A drive motor through reduction means and connecting rod and crankshaft structure is appropriately connected to both the parts bin and the counterweight structure. The grid structure of the parts bin may be replaced with different size spacing grids for different size of parts to be untangled. The parts are untangled by the method of shaking them in a vertical direction and allowing the parts to be so vibrated that they tend to separate and become unentangled.

Abstract: A platform or tray for holding laboratory containers such as test tubes is driven in orbital motion by an eccentric drive mechanism housed in a cabinet. First and second pairs of tracks are mounted respectively beneath the tray and to the top of the cabinet. An intermediate plate holds four disc-shaped, low-friction bearing elements, each coupled to and guided by an upper and a lower track to maintain said tray in the same disposition during its orbital motion. An electronic circuit controls orbital speed in a continuous manner over the operating range, even at low speeds. The system operates in either a continuous mode or timed mode under control of a switch. The motor which drives the platform also drives a dc motor, the terminal voltage of which is displayed as a signal representing the speed of operation. Both the speed and the time (in timed mode of operation) may be controlled by the operator. A vibration-free mounting system is used to secure the main motor and drive train within the cabinet.