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 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 vibratory screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.

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 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 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 screen assembly for separating solid materials of differing sizes in a material stream, having a support, and a screen arrangement placed upon the support, wherein the support has at least one seal placed on the support, the seal configured to interface with a mounting surface of a shaking apparatus.

Abstract: A molded polyurethane vibratory screen including a body having opposite side edge portions, upper and lower edge portions, an upper surface and a lower surface, first members extending between the side edge portions and the second members extending between the lower edge portion and the upper edge portion, third members substantially parallel and extending transversely between the side edge portions and having multiple first members therebetween, the fourth members substantially parallel and extending transversely between the lower edge portion and the upper edge portion and having multiple second members therebetween, reinforcement members molded integrally with the third and fourth members.

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 screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.

Abstract: A method and apparatus for centrifuging.

Abstract: An undulating molded plastic vibratory screen including a base, a plurality of spaced substantially parallel undulations on the base, screen configurations on the undulations, and supporting rib structure within the undulations.

Abstract: Disclosed within is a fist bracket comprising a base and a circumferential portion extending from the base in which the circumferential portion comprises an outer surface and an inner surface and the outer surface comprises a curved section and a planar section. Also disclosed within is a combination of a motor mount bracket and fist bracket comprising a fist bracket with a base and a circumferential portion extending from the base. The circumferential portion includes an outer surface and an inner surface and the outer surface comprises a curved section and a planar section. The combination further includes a bushing disposed within the circumferential portion of the fist bracket.

Abstract: A vibratory screening machine having opposite sides with a plurality of stationary aligned tensioning members mounted on one side and a plurality of nut actuated movable tensioning members mounted on the opposite side and a vibratory screening screen mounted on the stationary and movable tensioning members. The tensioning members have upstanding fingers which are received in apertures in the plates of the vibratory screen, and the edge portions of the vibratory screen include screening material which extends all of the way to the extreme edges of the supporting plate and the fingers are below the screening material. Also, the tensioning structure is mounted on the side walls of the vibratory screening machine below the vibratory screen.

Abstract: An oil and gas drilling installation having a drill rig with a bell nipple having an outlet at a predetermined elevation, a screening machine having a feeder and an angularly adjustable vibratory frame, a weir positioned between the feeder and the vibratory frame, the weir having an elevation which is lower than the predetermined elevation of the outlet of the bell nipple but immediately above the portion of the screen frame adjacent to the weir, and a downwardly inclined conduit between the bell nipple conduit and the feeder. A vibratory screening machine and feeder combination including an angularly adjustable vibratory frame on the vibratory screening machine, and a weir and flexible seal between the feeder and the vibratory frame at an elevation which is immediately above the portion of the vibratory frame which is adjacent to the weir.

Abstract: A screen assembly which includes a frame, a plurality of openings in the frame, a screen overlying the openings, a plurality of spaced tapered ribs on the opposite side of the frame from the screen, a first end on the frame with a lip, and a second end on the frame with a clip thereon. Another embodiment has a first end with a ledge and a second end with an overhanging portion, and a seal on the ledge.

Abstract: An oil and gas drilling installation having a drill rig with a bell nipple having an outlet at a predetermined elevation, a screening machine having a feeder and an angularly adjustable vibratory frame, a weir positioned between the feeder and the vibratory frame, the weir having an elevation which is lower than the predetermined elevation of the outlet of the bell nipple but immediately above the portion of the screen frame adjacent to the weir, and a downwardly inclined conduit between the bell nipple conduit and the feeder. A vibratory screening machine and feeder combination including an angularly adjustable vibratory frame on the vibratory screening machine, and a weir and flexible seal between the feeder and the vibratory frame at an elevation which is immediately above the portion of the vibratory frame which is adjacent to the weir.

Abstract: A screen assembly which includes a frame, a plurality of openings in the frame, a screen overlying the openings, a plurality of spaced tapered ribs on the opposite side of the frame from the screen, a first end on the frame with a depending lip, and a second end on the frame with a clip thereon. Another embodiment has a first end with a ledge and a second end with an overhanging portion, and a seal on the ledge.

Abstract: A screen assembly comprising a support, a screen comprising peaks and troughs, and a coating on at least a portion of a plurality of the peaks. An apparatus for screening material comprising a frame, a motor mounted to the frame, a screen assembly supported by the frame, a chamber beneath the screen assembly adapted to be placed intermittently at less than atmospheric pressure, a screen formed in an undulating shape comprising a plurality of peaks and troughs, and a coating on at least a portion of a plurality of the peaks.

Abstract: Disclosed within are methods and apparatus for screening a slurry, in which the slurry is vibrated and conveyed across a screen and suction is applied from below the screen. Air, particles and liquid are drawn through openings in the screen and may be conveyed to a separator, where the particles and liquid are then separated from the air.