Abstract: An extractor can be used to extract solvent-soluble molecules, such as aqueous or organic-soluble molecules, from solid material feedstock for downstream processing and recovery. In one configuration, the extractor is a percolation extractor having one or more extraction chambers each containing a screen supporting the solid materials as it is conveyed through the chamber, a fluid supply system delivering extraction fluid disposed above the solid material, and a fluid recovery system disposed below the solid materials for receiving the extraction fluid and solvent-soluble molecules contained therein. The extractor further includes a screen washing system disposed under the screen and supported against movement. The screen washing system includes a washing fluid intake and a plurality of outlet nozzles directed upward towards the screen. The screen washing system can keep the screen from plugging during operation, improving the extraction efficiency of the extractor.

Abstract: The invention relates to a sieve screen, which can be positioned in a utility machine-operated screen bucket or in a screening station maneuverable with its own actuator. As shown in FIG. 7, a plurality of screening plates (3) are spaced from each other and establish a screening surface (2), which is provided with screening slots and on top of which can be placed the material to be screened. Rotatable shafts (4) are present below the screening surface (2). The shafts (4) feature blades (5), which protrude from the shafts and extend through the screening slots to above the screening surface (2). Fraction size is adapted to be changed without removing the shafts (4), by re-grouping the blades (5) and a necessary number of the screening plates (3). The blades (5) can be grouped in such a way on the shafts (4) that at least two blades (5) are set adjacent to each other and the adjacent blades are located within the same screening slot.

Abstract: The invention disclosed and claimed herein is a device for processing minerals and a method for its use, which device and method employ gravimetric principles to separate values in a feedstock from gangue, thereby allowing recovery or concentration of the values. The invention includes a table that receives and holds the feedstock, a chassis for supporting the table, and a mechanism for imparting a specific motion to the table, the motion being referred to as “compound cyclic,” which is a reciprocating, rectilinear, to-and-fro motion parallel to or coincident with the working axis of the table, combined with a simultaneous, continuous, and smooth vertical up-and-down motion that eliminates vertical jolting, jarring, or bumping.

Abstract: A process for classifying water-absorbing polymer beads, wherein the polymer beads are separated into n particle size fractions by means of at least n screens and n is an integer greater than 1.

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 modular screening apparatus has four parallel shafts arranged in a single plane mounted to each module. The shafts extend between the sides of the machine frame and are driven by a motor and timing belts which connect the shafts directly or indirectly to the drive motor. Each shaft supports three beater bars which are equally spaced about the axis of the shaft. A screen bed defined by a perforated polyurethane plastic sheet overlies the plane containing the driven shafts. The sheet serves as a screen which is clamped at its upstream edge, the downstream end extending over a fixed bar and vertically downwardly, to suspend a weight. The sides of the screen abut adjustable side plates which are mounted to the machine frame and define the boundaries of the screen bed. The beater bars rotate on the shafts to strike the underside of the screen.

Abstract: A garden sieve for a wheelbarrow has a collar frame adapted to conform to and fit loosely on the rim of a wheelbarrow. A sieve frame connected to the collar frame supports a wire screen adapted for sifting granular material. A motor can be connected between the wheelbarrow and the sieve to reciprocate the wire screen. The frame can include a partially removable gate for the removal of strained material and can include roller bearings to reduce friction between the sieve and the wheelbarrow.

Abstract: An apparatus and method for cleaning, desanding, and desilting drilling mud which contains unwanted solids utilizes an enclosure divided into a plurality of compartments connected with a system of vibratory screen shaker separators, desanders, and desilters. Drilling mud is separated by a primary vibratory shaker into coarse solids which is discarded and screened liquid mud which enters a first compartment and is further separated by a desander cyclone into a lighter liquid mud faction and a heavier liquid mud faction. The lighter faction is sent back to the first compartment and recycles, the heavier faction is further separated by a second vibratory shaker and enters a second compartment, and the solids are discarded. The liquid mud from the second compartment is further separated by manifolded desilter cyclones into a heavier faction and a lighter faction.

Abstract: A sieve for powder. The sieve has a housing in which a transverse screen is mounted to divide the housing into upper and lower chambers. Air under pressure carries powder into a cyclone stack mounted on top of the housing from which it is directed onto the screen. A vibrator is connected to the screen to vibrate and thus to assist in the sieving operation. The screen is downwardly inclined and overlying its lower end an inspection cover is mounted in the housing to permit access to the screen for removal for the material which does not pass through the screen.

Abstract: A power sieve has a generally planar and longitudinally extending frame having upstream and downstream ends and a pair of laterally spaced side members extending longitudinally between the ends, a generally planar screen spanned longitudinally within the frame, and a plurality of longitudinally spaced and substantially parallel beater beams underneath the screen and having beam ends juxtaposed with the frame side members. Respective horizontally extending leaf springs each have one end secured to the respective side member and another end secured to the respective beam end. Thus the beams can move generally vertically on the springs. Respective beater arms extending generally parallel to the screen from the beater beams have outer ends engageable with the underside of the screen.

Abstract: A vibratory power screen normally has a generally planar and longitudinally extending frame having upstream and downstream ends and a pair of laterally spaced side members extending longitudinally between the ends. A generally planar screen is spanned longitudinally within the frame normally between its ends. The entire frame is tilted down from the upstream to the downstream end. Thus when particulate material is loaded onto the screen at the upstream end the particulate material migrates down along the screen to the downstream end with the smaller fractions falling through the screen. This sieve has respective pivot plates rotatably supporting beater shafts on the side members of the frame for rotation about respective substantially parallel adjustment axes extending transversely of the frame underneath the screen. Beater arms, which extend parallel to the screen from the beater shafts, have outer ends which engage the underside of the screen.

Abstract: In a rotary screen for sorting wood or other particles of a desired size from other particles such as fine, moist, sticky sawdust particles, a plurality of balls are suspended beneath the screening surfaces in a manner such that the gyratory motion of the rotary screen imparts a resonant, pendulum-type motion to the balls, causing them to strike the bottom of the screening surfaces and loosen particles from the screen which would tend to clog the openings therein. The rotary screen includes a collection tray or "dust pan" to catch undersize particles, and a plurality of balls are also suspended beneath the bottom surface of the dust pan to strike it and prevent material build up in the dust pan.