Abstract: A drilling fluid shaker screen system includes a screen assembly that includes a screen including a plurality of screen sections. A first screen section includes a first screen mesh size and a second screen section includes a second screen mesh size different than the first screen mesh size. The drilling fluid shaker screen system further includes a rotation assembly mounted to the screen assembly. The rotation assembly includes one or more rollers moveable to rotate the screen assembly about an axis of rotation. The drilling fluid shaker screen system further includes a motor assembly coupled to the screen assembly and configured to vibrate the screen assembly. A housing includes a cuttings outlet that is fluidly coupled to a cuttings inlet formed in the screen and a liquid outlet separate from the cuttings outlet that is fluidly coupled to the plurality of screen sections.

Abstract: A computer-implemented method and system for verifying the identity of a user in an identity authentication and biometric verification system which includes collecting information from the user regarding the user's identity, which is then electronically authenticated. Upon authentication, personal information regarding the verified identity of the user is retrieved from a source database which is used to verify the identity of the user, via user interaction. Upon successful verification and authentication, biometric data regarding the user is electronically collected.

Abstract: The present invention provides a vibratory screening apparatus (1) for use in removing solids from a liquid feed, and a basket (4) therefore. The apparatus comprises a static outer housing (2), and a floating basket vibratable by a vibrator device (10). The basket mounts a stack (7) of screen assemblies (8) provided with respective flow directing trays (9) for receiving filtrates from the screen assemblies. A flow distributor (15) divides the feed into at least first and a second feed streams and directs them onto respective screen assemblies, and receives from the flow directing trays, filtrates from respective screen assemblies.

Abstract: The present invention provides a vibratory screening apparatus (1) for use in removing solids from a liquid feed, and a basket (4) therefore. The apparatus comprises a static outer housing (2), and a floating basket vibratable by a vibrator device (10). The basket mounts a stack (7) of screen assemblies (8) provided with respective flow directing trays (9) for receiving filtrates from the screen assemblies. A flow distributor (15) divides the feed into at least first and a second feed streams and directs them onto respective screen assemblies, and receives from the flow directing trays, filtrates from respective screen assemblies.

Abstract: The present invention provides a vibratory screening apparatus (1) for use in removing solids from a liquid feed, and a basket (4) therefore. The apparatus comprises a static outer housing (2), and a floating basket vibratable by a vibrator device (10). The basket mounts a stack (7) of screen assemblies (8) provided with respective flow directing trays (9) for receiving filtrates from the screen assemblies. A flow distributor (15) divides the feed into at least first and a second feed streams and directs them onto respective screen assemblies, and receives from the flow directing trays, filtrates from respective screen assemblies.

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: A vibratory separator including basket apparatus for holding screening apparatus, at least one upper screen apparatus in the basket, the at least one upper screen apparatus having a fluid exit end, at least one lower screen apparatus in the basket below the at least one upper screen apparatus, fluid flowable from the at least one upper screen apparatus down onto the at least one lower screen apparatus, flow diffusion apparatus mounted below the fluid exit end of the at least one upper screen apparatus and above the at least one lower screen apparatus, so that fluid flowing down from the at least one upper screen apparatus flows onto the flow diffusion apparatus and is diffused thereby, and vibrator apparatus for vibrating the basket and the screen apparatus therein.

Abstract: A vibratory screening machine including an outer frame, an inner frame resiliently mounted on the outer frame, a plurality of screening units mounted in stacked and staggered relationship on the inner frame, each of the screening units including a screen-supporting surface and a chamber underlying the screen-supporting surface and an outlet duct in communication with the chamber, an undersize trough underlying the plurality of stacked and staggered screening units, a plurality of inlet ducts in the undersize trough with each of the inlet conduits in communication with one of the outlet conduits, and an oversize trough underlying the undersize trough and the stacked and staggered screening units.

Abstract: A method of manufacturing a large stationary, aggregate processing screening tower by fabricating weldment modules and preassembling them with aggregate processing equipment internal within the weldment modules, transporting the preassembled weldment modules to a field work site where the tower is to be erected on a foundation, aligning the modules and stacking the modules in layers and then bolting adjacent modules together. A large stationary, aggregate processing screening tower has weldment modules preassembled with aggregate processing equipment internal within the modules. The preassembled modules are stacked up on one another and secured together and can receive aggregate product at the top module and the product is processed by screening and sizing as it moves downwardly by gravity through the modules and their processing equipment for final clarification and collection of the product.

Abstract: A tandem shale shaker having at least a base, at least one upper shaker screen, at least one lower shaker screen, a basket, an apparatus for vibrating the basket, at least one distribution conduit, a flowback pan, a flow director, and a distribution apparatus. The upper and lower shaker screens are releasably mounted on the basket. The at least one lower shaker screen is mounted at a level below the level of the at least one upper shaker screen and underlies the at least one upper shaker screen. The flowback pan is disposed between the at least one upper shaker screen and the at least one lower shaker screen and overlies at least a portion of the at least one lower shaker screen. The flowback pan directs the screened material passing through the at least one upper shaker screen to the at least one distribution conduit.

Abstract: A vibratory screening machine including an outer frame, an inner frame resiliently mounted on the outer frame, a plurality of screening units mounted in stacked and staggered relationship on the inner frame, each of the screening units including a screen-supporting surface and a chamber underlying the screen-supporting surface and an outlet duct in communication with the chamber, an undersize trough underlying the plurality of stacked and staggered screening units, a plurality of inlet ducts in the undersize trough with each of the inlet conduits in communication with one of the outlet conduits, and an oversize trough underlying the undersize trough and the stacked and staggered screening units.

Abstract: A vibrating dual deck dewatering unit which includes a lower screen deck and an upper screen deck. Material being processed by the unit is discharged from the upper screen deck onto the lower screen deck in such a manner that excess water is allowed to backflow beneath the upper screen deck, while solids are directed in an opposite direction. The upper screen deck is provided with a jagged discharge lip which creates interruptions or gaps in the flow of discharged solids. The excess water which is discharged from the upper screen deck is allowed to backflow through the interruptions or gaps in the discharged solids that are created by the jagged discharge lip of the upper screen deck.

Abstract: A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the frame and comprises alternating closed channels and screen rows which alternate across the width of the frame.

Abstract: A sifter having a resiliently mounted housing with horizontal vibrated screens. Airborne material to be sifted is introduced between the screens where it is deflected by a deflector and a breaker ring to distribute material both upwardly and downwardly to the screens. An external passage from above the upper screen conveys air and material to a discharge pipe below the lower screen and below a bottom pan which feeds into the distribution pipe. An extended passage for discharging oversize material from between the screens is open along its length to the lower screen. A weir at the inlet of the extended passage has a thin slit below and a larger hole above to allow material under certain conditions to flow into the outlet passage.

Abstract: The screening apparatus for efficiently separating coarse material from finer material, comprises a frame having a lower portion for resting on a surface, and a higher portion; a vibrating screen unit including a first material separating screen having a lower edge sloping downward with respect to said surface, and supported by the frame between the lower and higher portions; a shaker attached onto the vibrating screen unit for shaking the vibrating screen unit; a pivoting skip sufficiently wide for accommodating a payloader shovel, having two side arms pivotally connected onto the higher portion of the frame at a level that is sufficiently low for accommodating the payloader shovel; and a vibrator unit connected onto the skip.

Abstract: Apparatus for removing debris from granular material includes a set of scalper assemblies and striker assemblies, which are disposed between an inlet and an outlet, and which are interconnected by a mechanical system to help urge the flow of the material through the housing to the outlet. The scalper assemblies are disposed on a set of frames covered with removable screens so that the flow of material falling against the scalper screens, cascades down the screens to form a flowing sheet of material, which falls off of the terminal end of the frame. The scalper screens are tiered and portions thereof are raised and dropped to help urge the larger debris within the granular material downwardly across the scalper screen towards its terminal end, while concurrently permitting the smaller granular material disposed thereon to fall through the screen meshings.

Abstract: A multiple deck screening machine wherein the feed material is divided into separate equal fractions on a rubble screen deck and scalp screen decks. Each deck includes downwardly slanting distribution panels having serrated lower edges. Particulate flow over the serrated edges is divided into separate fractions. Each adjacent fraction passes into a different parallel vertical channel which serves a particular screen deck via a chute. The chutes and channels extend the full width of the screens. Flow across the serrated edges is separated due to the notches and tongues and upstanding dividers along the common edge to each notch and tongues. Each notch and tooth of the rubble screen deck is disposed in juxtaposition to an opposed tongues and notch respectively so that excess flow over a tongues may pass over its channel into the channel of the opposed notch. The rubble screen deck including a pair of downwardly and inwardly inclined distribution panels which oppose each other and define a flow gap therebetween.

Abstract: An apparatus for sizing or separating different types of particulate material such as grain, seeds and the like without the need for replacing the sizing screens includes a movable diverter disposed between upper and lower sets of screens. When the diverter is in a first position, material passing through a first sizing screen is directed to the top of a second sizing screen and material which has not passed through the first sizing screen is directed to a discharge pan. When the diverter is in a second position, material which has passed through the first sizing screen is directed toward a discharge pan and material which has not passsed through the first sizing screen is directed toward a second sizing screen.

Abstract: An improved wood chipping installation of reduced overall height has conveyor means for feeding wood pieces to a chipping machine. The conveyor means includes a conveyor type screening device for separating proper size chips from oversize chips. Means are provided for transferring material chipped by the chipping machine back to the infeed end of the screening device so that oversize chips are fed by the conveyor, along with other wood pieces, back into the chipping machine while proper size chips and fines are separated out.

Abstract: A grain scalping and cleaning apparatus for removing impurities in grain according to size is disclosed. The apparatus includes multiple grain movement paddles moving relative to appropriate screens. An endless chain drives the grain movement paddles. Both large and small impurities are separated from the grain through the use of the screens and paddles with the aid of gravity. A method for removing impurities in grain is also disclosed.

Abstract: The invention is directed to a process of dissolving a high molecular weight olefin polymer having an inherent viscosity of at least 3.5 in a hot hydrocarbon solvent to form solutions which are totally free of undissolved polymer particles. Apparatus for carrying out the process also is described.The process includes stirring a slurry of fine particles of the polymer and the solvent in a chamber whose inlet and outlet are covered with screens. The outlet screen has a smaller mesh than the inlet screen. The solution is filtered through the outlet screen into a second chamber which is similar to the first one except that the second outlet screen is finer than the first outlet screen. The stirring and filtering through successively finer outlet screens is repeated in a series of chambers until a solution which is free of undissolved polymer particles is obtained. The solution is kept at least 190.degree. C throughout the process.