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| Number | Title | Issue Date |
| 7416658 | Elliptical motion drive device for a step screen Disclosed herein is an elliptical motion drive device for use in a step screen. The elliptical motion drive device comprises first and second eccentric wheels coupled to a single drive shaft to be eccentrically positioned to each other. Upon rotation of the drive sh... | 08/26/2008 |
| 7331469 | Vibratory separator with automatically adjustable beach A vibratory separator having a basket for supporting screen apparatus for treating material, the basket pivotably mounted on a base, vibratory apparatus connected to the basket for vibrating the basket, the material forming a pool on the screen apparatus, and a beac... | 02/19/2008 |
| 7278540 | Adjustable basket vibratory separator A vibratory separator having a base, a basket movably mounted on the base and for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto, vibratory apparatus connected to the... | 10/09/2007 |
| 7216767 | Screen basket and shale shakers A screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, the basket including two opposed spaced-apart side walls having first e... | 05/15/2007 |
| 7198156 | Dam basket for vibratory separators A vibratory separator and a screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, at least one screen assembly mounted in the b... | 04/03/2007 |
| 7186347 | Vibratory apparatus for separating liquid from liquid laden solid material A vibratory apparatus for separating a liquid from a liquid-laden solid material. The apparatus includes an inclined trough having a base with a first end and a second elevated with respect to the first end. A deck is attached to the trough base, the deck defining s... | 03/06/2007 |
| 7168569 | Vibratory screening machine for earth drilling installation 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, t... | 01/30/2007 |
| 7108793 | Method of separating liquid from liquid laden solid material A method of separating a liquid from a liquid-laden solid material includes providing a trough having a deck defining a support surface with passages extending through the support surface. The liquid-laden solid material is deposited onto the support surface so that... | 09/19/2006 |
| 7093678 | Method and apparatus for removing fluids from drill cuttings A method and apparatus is provided for removing fluids, particularly entrained and/or adherent fluids, from drill cuttings generated during the well drilling process. A generally cylindrical wire-wrapped screen having a bore therethrough rotates about its longitudin... | 08/22/2006 |
| 6932883 | Screens for vibratory separators A method for making a screen assembly for a vibratory separator, the method including, in at least certain aspects, gluing together with glue at least two layers of fine screening material, allowing the glue to set, preheating the glued together at least two layers ... | 08/23/2005 |
| 6669854 | Stepping screen assembly hydraulically driven A stepping screen assembly bottom portion is located in a liquid waste stream containing solids. The assembly contains a grid structure containing dynamic and static bars horizontally spaced apart. An outer frame on one side of the grid structure contains... | 12/30/2003 |
| 6592765 | Method and device for collecting oil mixed with ice blocks A method and a device for separating oil from ice. In the method, ice is pressed under the water along an inclined surface formed by a bar screen (3) or a grating. The oil is separated from the ice by vibrating the inclined surface formed by the bar scree... | 07/15/2003 |
| 6564947 | Method of screening material utilizing a plurality of undulating screen assemblies A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to t... | 05/20/2003 |
| 6340089 | Method of fabricating undulating screen for vibratory screening machine A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to t... | 01/22/2002 |
| 6251294 | Ultrasonic filter regenerating apparatus and method A self-regenerating filter unit having a housing which carries an ultrasonic transducer periodically energizable to dislodge caked solids from a filter element in the housing. The removed solids collect in a storage zone where they are periodically remove... | 06/26/2001 |
| 6053332 | Method of fabricating undulating screen for vibratory screening machine A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to t... | 04/25/2000 |
| 6000556 | Screen assembly for vibratory screening machine A screening screen assembly for a vibratory screening machine including an apertured plate having side edge portions with first apertured bands extending between the side edge portions and second unapertured bands alternating with the first bands, the sec... | 12/14/1999 |
| 5967336 | Vibrating screen assembly with improved frame A vibrating screen assembly having a frame with a pair of opposed sides and a pair of opposed ends. The frame includes a planar surface and an upstanding lip extending vertically from the planar surface to form a rim enclosure. A leg extends downward vert... | 10/19/1999 |
| 5958236 | Undulating screen for vibratory screening machine and method of fabrication thereof A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to t... | 09/28/1999 |
| 5944993 | Screen assembly for vibrating screening machine A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel r... | 08/31/1999 |
| 5876552 | Method of fabricating screen for vibratory screening machine A screening screen assembly for a vibratory screening machine including an apertured plate or frame, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid... | 03/02/1999 |
| 5868929 | Screen assembly for vibrating screening machine A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel r... | 02/09/1999 |
| 5853583 | Multi-functional linear motion shaker for processing drilling mud A multi-functional linear motion shaker includes a rectangular outer support frame with a tank, often referred to as a "possum belly", for receiving the incoming drilling fluid flow. A set of adjustable louvers and a tray is positioned on the side of the ... | 12/29/1998 |
| 5814218 | Distorted rectangular filter cloth screen for vibrating screening machine A screen for use with a vibrating screening machine to filter undesired particles from a liquid uses a filter cloth having a substantially rectangular mesh suitable for separating the undesired particles from the liquid bonded in laminar relationship to a... | 09/29/1998 |
| 5783077 | Undulating screen for vibratory screening machine A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bond... | 07/21/1998 |
| 5720881 | Screen assembly for vibrating screening machine A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel r... | 02/24/1998 |
| 5685982 | Vectored thrust shale shaker A vibratory vectored thrust shaker for separating solid materials from fluids has a base frame and a screen bed support frame carrying a mesh screen supported horizontally above the base frame by resilient supports. An eccentrically weighted vibratory sha... | 11/11/1997 |
| 5683580 | Nonuniform forward elliptical motion end feed separator A vibratory deck of an end feed separator transfers material in a linear direction from the feed end to the discharge end of a screen mounted on the separator frame. A pair of rotary eccentric vibrators is independently mounted in mirror relationship on o... | 11/04/1997 |
| 5641070 | Shale shaker A shale shaker has been developed which, in one aspect, has one or more upper screens and one or more lower screens with an upper screen at a discharge end of the shale shaker and a lower screen disposed to receive material discharged from a discharge end... | 06/24/1997 |
| 5636749 | Undulating screen for vibratory screening machine A screening screen assembly for a vibratory screening machine includes a substantially planar apertured plate and an undulating subassembly of a support screen and a fine screening screen having ridges and troughs. A fused plastic grid bonds the fine scre... | 06/10/1997 |
| 5614094 | Vibrating screen unit 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 fram... | 03/25/1997 |
| 5593585 | Spray system for cleaning a filter screen A screening chamber for filtering paper coatings is cleaned with the use of a plurality of water sprays. The water sprays are provided by nozzles located on spray bars positioned transversely across the width of the screening chamber. The nozzles are orie... | 01/14/1997 |
| 5417793 | Undulating screen for vibratory screening machine and method of fabrication thereof A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bond... | 05/23/1995 |
| 5417858 | Screen assembly for vibrating screening machine A screen assembly for a vibratory screening machine including a frame in the nature of a plate having spaced apertures therein, spaced frame members on opposite sides of the apertures, a screen formed in an undulating shape having substantially parallel r... | 05/23/1995 |
| 5417859 | Undulating screen for vibratory screening machine and method of fabrication thereof A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bond... | 05/23/1995 |
| 5221472 | Vacuum filtration apparatus with horizontal filter-like conveyor A vacuum filtration apparatus is provided with one or more vacuum chambers fixedly secured at predetermined positions. The interior of the vacuum chamber alternates between a partial vacuum and atmospheric pressure. An endless filter belt has a horizontal... | 06/22/1993 |
| 5190645 | Automatically adjusting shale shaker or the like A shale shaker or the like comprises a hollow body having an inlet and an outlet. A screen is mounted generally horizontally in the hollow body between the inlet and the outlet. A motive assembly is operatively connected to the screen for repetitively mov... | 03/02/1993 |
| 5076921 | Filtering screens A vibratory filtering screen assembly comprises an upwardly inclined member (12) on which is mounted the main filtering screen (14). At the exit (16) of the main screen is a secondary screen module (20) comprising a plurality of transverse supports (22) o... | 12/31/1991 |
| 4911834 | Drilling mud separation system A separation system for removing drilled solids from a drilling fluid being circulated in a well including a vibratory screen apparatus (10) and method for separating materials having a base (12) supporting a vibratory support frame (13) for relative vibr... | 03/27/1990 |
| 4886608 | Apparatus and method for separating liquids and solids An apparatus for separating liquids and solids from a mixture thereof comprises a trough structure (12) in which is suspended a filter means (14) on which the mixture can be placed. A vacuum mechanism (16) draws a vacuum beneath the filter means to draw t... | 12/12/1989 |
