Abstract: Apparatus for reclaiming aggregate from unset concrete comprising an inclined rotating drum, a reservoir space in the drum, and means for separating the slurry in the reservoir from aggregate in the reservoir, the slurry exiting from the lower end of the drum and the aggregate exiting from the upper part of the drum.

Abstract: A screening apparatus for fiber suspensions comprising a stationary cylindrical screen one side of which is in flow communication with the inlet for the fiber suspension and the other side, from which the accepted stock emerges, forming an annular space with a rotor comprising a cylindrical wall having elevations for producing positive and negative pressure thrusts serving to keep the screen clear and openings behind the projections through which some of the accepted stock passes to provide an alternative path to the outlet for the accepted stock.

Abstract: A relatively quiet vibrating screen has a rotatable eccentric mass drive supported on the screen body by isolator mounts which transmit vibratory forces at shaker frequency unrestrained to the screen body and attenuate forces at higher harmonics of shaker frequency that would otherwise excite wall panels of the screen body into resonance, thereby reducing the noise level of the screen.

Abstract: A screening machine (FIG. 3) having a vibrator constructed so that the striking elements 7 move substantially only vertically. The vibrator comprises springs having crossing elements 2,3 mounted on the frame and connecting member 4. The connecting member 4 can be moved to rotate the striking elements about the crossing point D of the crossing elements, which is disposed substantially in the plane of the spring.

Abstract: An archaeological sifting basket is disclosed for use at the site of an archaeological dig, said basket comprising a frame, with wire mesh screen attached. The basket is hinged to be collapsible and has a bottom wall made up of two planar areas arranged at an angle to each other for increased flexibility of use.

Abstract: An apparatus for sorting wood chips or other particulate material into groups according to size. The apparatus includes a housing having an opened top, a first screen attached to the housing substantially covering the opened top thereof, a second screen attached to the housing beneath the first screen, and a hopper fixedly attached to the housing for holding a quantity of wood chips and for depositing wood chips onto substantially the center of the first screen. The first and second screens slope downwardly from the centers thereof so that any wood chips of a size too large to pass therethrough will pass, aided by the force of gravity, to the periphery thereof.

Abstract: A frusto-conical screen separator having its longitudinal axis inclined from the horizontal so that its undersurface lies in an essentially horizontal plane, the separator being divided internally into three zones, the first zone comprising a dewatering zone at its largest diameter end, the second zone comprising a washing zone, and the third zone comprising a final dewatering zone at its smallest diameter end, the separator having external shower means overlying the first and second zones, breaker bars in the first zone, internal baffle means in the second zone, and guide bars in the third zone, the materials to be separated passing through the separator from its larger to its smaller end, a recovery tank underlying the separator for recovering separated materials passing through the screen, the unscreened residual materials being discharged at the smaller end of the separator.

Abstract: An apparatus having a bowl-shaped screen with a large opening at the upper end thereof and a smaller opening at the lower end thereof for screening annularly distributed influent. An influent manifold is located above the screen to distribute influent downwardly into the upper opening. An effluent receiver is positioned about the screen while a concentrate receiver is positioned below the lower opening of the screen. A distributor cone is positioned in the upper opening to direct influent outwardly and downwardly to the screen. The cone is vertically adjustable to vary the size of the annular opening between the cone and the screen. The cone is also rotatably mounted to aid in uniformity of distribution. A tangential influent feed is employed to induce rotation of the distribution cone. A rotatably mounted backspray manifold extends about the screen with nozzles directed to induce rotation of the manifold.

Abstract: A clarification device for solids-liquid separation by gravitational settling has a peripheral inlet trough connected to a plurality of uniformly spaced inlet conduits which direct influent liquid and solids toward the center of the clarifier. The size of the hole in the inlet trough communicating with each inlet conduit can be selectively controlled and individually changed. This enables the volume of liquid and solids withdrawn through each hole to be controlled so as to cause the velocity energy decrease at each hole to generally equal the friction energy loss between any hole and the preceding hole while maintaining about the same volume of discharge flow into the clarifier through each inlet conduit.

Abstract: Apparatus for the refinement of colloidal asbestos dispersions comprises a horizontally disposed cylindrical tube having a plurality of closely spaced holes around the periphery thereof, a helical screw disposed within the tube, and a flanged jacket concentric with and spaced outwardly from the tube. A slurry of unrefined dispersion is continuously fed into the tube to fill it. Refined slurry is drawn through the holes by a suction pump connected to the jacket while contaminants are retained in the tube and moved by the screw to the outlet end of the tube where they are compacted and removed as sludge through a spring loaded discharge door.

Abstract: A bi-directional filter drier is provided for reverse flow applications as encountered, for example, in heat pump systems. The filter drier includes a shell defining a chamber, the shell having an inlet and an outlet, preferably axially aligned with one another, which communicate with the chamber. A suitable filter means is positioned in the chamber and a fluid flow path within the chamber is designed so that fluid flow through the filter always occurs in a single direction, regardless of the direction of flow through the inlet and outlet. Flow within the chamber and thus the filter is controlled by a simply constructed valve combination at the inlet and the outlet.

Abstract: A filter assembly including a filter frame with filter media disposed therein and a border flange arranged to engage the edge of the filter frame, the border frame being clamped to the frame by a deformable resilient clamp which is inserted between the filter frame and the flange.

Abstract: A rubber screen for a vibratory screening apparatus comprises a plurality of first parallel rope members having suitable cross sectional shapes and arranged in a particle flowing direction, each of said first rope members having a tensile member composed of a strand of filament having a high elongation at break and an organic material having flexibility and/or elasticity and covering the tensile member, and a plurality of second parallel rope members having suitable cross sectional shapes and arranged in a direction normal to the first rope members, each of the second rope members having a tensile member of a material having a low elongation at break and an organic material having flexibility and/or elasticity and covering the tensile member, each point of intersection between the first and second rope members being suitably bonded.

Abstract: Severed metal bearing ore is placed in a vessel having a water inlet at the bottom and an outlet at the top. A propeller causes water to flow upwardly through the vessel and to be discharged through the outlet carrying gangue with it. Concentrate, which is heavier because it contains the metal to be recovered, does not rise to the level of the outlet and therefore remains in the vessel. To achieve better vertical separation of the gangue and concentrate, a horizontal screen is positioned above the propeller to equalize pressure and inhibit rotational flow in the upper portion of the vessel.

Abstract: A multiple deck trommel screen is provided having at least an inner course screen and an outer fine screen, both having a diameter greater than the rotating drum to which they are attached for separating fines from course material. A deflector plate is provided at the end of the trommel screen for impingement of air-borne particles so that they fall on the inner trommel screen. A first hopper is provided under the outer trommel screen for receiving the fines and a second hopper is provided beyond the end of both of the trommel screens for receiving the course material. The outer trommel screen is made up of generally flat screen sections which extend as chords around the periphery of a trommel screen frame.

Abstract: A mixture of liquids and solids flowing at high velocity is discharged into a well which reduces its velocity. The mixture flows from the well over a dam and is deposited uniformly onto a moving porous woven filter belt which drains the liquid and transports the solids to a place where the solids fall from the belt or are scraped from it.

Abstract: A mechanism for screening a stock slurry for a paper making machine including a cylindrically shaped tubular screen with a stock supply at one end and a discharge at the opposite end for rejected stock and an annular receiving chamber outwardly of the screen for material which passes the screen and rotating axially extending foils within the screen, each foil having a rib projecting radially inwardly and extending in a helical direction at an angle to the foil to move the stock from the supply end of the screen to the discharge end.

Abstract: An air classifier system for separating mixed materials and comprising the combination of a horizontal drum or tunnel having a feed screw therein at one end of which mixed materials are deposited for movement toward the discharge end of the drum, and means for directing a flow of air through the drum at relatively high velocity for entraining and removing light materials from the drum while permitting heavy materials to be independently moved out of the drum by the screw.

Abstract: Grit is removed from liquid sewage by flowing such sewage into a settling chamber and causing the sewage to flow in a toroidal pattern around the periphery of the chamber. Grit falls to the floor of the settling chamber and passes radially to and then through a central opening into a grit collection chamber therebeneath. Organic solids are kept in motion in the toroidal flow pattern, or lifted from the settling chamber floor into such flow pattern, and are discharged through an outlet adjacent the upper surface of the liquid in the settling chamber. Toroidal flow is created and maintained by obstructing the tangential flow path of incoming sewage with a baffle which blocks the tangential inlet and has an edge extending above the upper surface of the liquid. A propeller rotating about a vertical axis in the center of the chamber is adjustable so as to keep the contents of the chamber impinging against the baffle as they flow around the tank in the toroidal pattern.

Abstract: This invention relates to a separator with a vertical axis, with a fan for producing the separating air stream coaxially disposed on a hollow shaft in the separator housing, a scatter plate rotating in the separator chamber, a counter-impeller system also rotating in the separator chamber, together with a drive mechanism mounted on the separator housing cover and comprising a drive motor, first gearing coupled with the hollow fan-shaft, and second adjustable gearing which drives the scatter plate and the counter-impeller system through a core shaft coaxially disposed in the hollow fan-shaft.