Including Discharge-related Structure In Nature Of (a) Outlet Having Device For Controlling Quantity Of Flow, (b) Element Associated With Pickup Of Material And Adjustable For Varying Quality Of Flow, Or (c) Static Scraper Or The Like For Engaging Material In Moving Bowl Patents (Class 494/56)
  • Patent number: 6796934
    Abstract: Prior continuous discharge centrifugal concentrators for separating higher density particles from a slurry have used pinch valves to control the flow of discharge. Such pinch valves tend to be blocked by coarse particles, requiring shutdown of the machine. The present invention provides a muscle-type valve to provide a circular orifice for the valve bore of continuously variable perimeter.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: September 28, 2004
    Assignee: Falcon Concentrators Inc.
    Inventors: Steven A. McAlister, Mark Henry Vinchoff, Stephen Scott Thomas
  • Publication number: 20040178138
    Abstract: A centrifuge with controlled discharge of dense materials disclosed. A centrifuge includes a fluid separation wall placed within a sleeve to form a containment zone therebetween. The fluid separation wall aligns and rotates parallel to an axis of rotation. A receptacle forming a part of the fluid separation wall includes a void area. An opening extending through the fluid separation wall from the void area to the outer surface of the receptacle transports the more dense material to the containment zone. A valve ring forming a part of the fluid separation wall includes a valve orifice. The valve ring aligned perpendicular to the axis of rotation and slides along the fluid separation wall to move between open and closed positions. The valve orifice aligns with the opening such that the more dense material exits the fluid separation wall and moves into the containment zone.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 16, 2004
    Applicant: Phase, Inc.
    Inventors: Curtis Kirker, Berkeley F. Fuller
  • Patent number: 6767461
    Abstract: A separator for separating particles entrained in a fluid is disclosed. The separator includes a sleeve adapted to be mounted over a rotatable shaft for forming a cavity therebetween, an inlet to the cavity, an outlet to the cavity and means for imparting a centrifugal force on fluid within the cavity. The means for imparting the centrifugal force is operatively connected to the shaft so that, in use, spinning of the shaft creates the centrifugal force. In use, a slurry of fluid and particles enters the cavity through the inlet, the particles are caused to separate from the fluid by action of the centrifugal force, and the separated particles and fluid leave the cavity via the outlet with the particles tending to be closer to the sleeve than the shaft.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 27, 2004
    Assignee: Environmental Separation Technologies PTY LTD
    Inventor: Richard Caulfield
  • Patent number: 6755969
    Abstract: A centrifuge with specific wall and opening shapes for receptacles is disclosed. A centrifuge may include a fluid separation wall aligned substantially parallel to an axis of rotation and include an inner surface, a void area, and an outer surface. The inner surface may be placed in contact with the fluid medium. The inner surface may include at least one receptacle. The receptacle may aid in separation of the more dense particles from the fluid medium. The centrifuge may further include at least one fluid flow path extending through the separation wall from the inner surface to the outer surface. The fluid flow path may transport the more dense particles to the containment zone.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: June 29, 2004
    Assignee: Phase Inc.
    Inventors: Curtis Kirker, Berkeley F. Fuller
  • Patent number: 6740027
    Abstract: A solid bowl centrifuge with liquid release during rotation includes a frame, solid bowl, drive device, scraper assembly, slurry spray, and liquid collection trough. The solid bowl includes a centrifuge chamber, and a liquid evacuation chamber. A plurality of openings are formed on the outer wall of the liquid evacuation chamber. The solid bowl is pivotal retained in the frame. The liquid collection trough is disposed around the liquid evacuation chamber. The drive device causes the solid bowl to rotate. Slurry is sprayed on to the wall of the centrifuge chamber while in rotation and eventually scraped-off the wall of the centrifuge chamber. A second embodiment of the solid bowl centrifuge with liquid release during rotation utilizes at least three bearing wheels to support an outer perimeter of the solid bowl at a bottom thereof. The liquid evacuation chamber is replaced with a liquid ring attached to a bottom of the centrifuge chamber and a liquid collection trough disposed around the liquid ring.
    Type: Grant
    Filed: April 20, 2002
    Date of Patent: May 25, 2004
    Inventor: Ronald D. Benson
  • Patent number: 6733433
    Abstract: A system for separating biological fluids into components, comprises a set of containers for the biological fluid to be separated and the separated components, optionally an additional container for additive solution, and a hollow centrifugal processing chamber having an axial inlet/outlet for the biological fluid. The processing chamber contains a piston movable to intake a selected quantity of biological fluid and express processed biological fluid components via the outlet. Optical means monitor the position of piston to control the amount of intaken fluid and the expression of components. A distribution valve arrangement selectively communicates the processing chamber and the containers or places them out of communication. The system is arranged to operate in a seperation mode and in a non-separation transfer mode, especially for adding preservative solution to separated blood stem cells.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: May 11, 2004
    Assignee: Biosafe S.A.
    Inventor: Claude Fell
  • Publication number: 20040072667
    Abstract: A rotating machine has a rotatable bowl generating a cylindrical slurry pool and at least one liquid phase discharge port assembly provided on the bowl. Each of one or more liquid phase discharge port assemblies on a bowl head define a liquid phase discharge path having a circumferential component oriented in opposition to a direction of rotation of the bowl. Each discharge port assembly includes a tubular member having at least one or two elbow pipe sections.
    Type: Application
    Filed: February 3, 2003
    Publication date: April 15, 2004
    Applicant: Baker Hughes Incorporated
    Inventors: Woon-Fong Leung, Ascher H. Shapiro
  • Publication number: 20040072668
    Abstract: In a rotating machine, at least one liquid phase discharge port assembly is provided on the bowl. The bowl is rotatable about an axis to generate a cylindrical pool of a feed slurry. The discharge port assembly includes at least one fluid guide member mounted at least indirectly to the bowl to define a liquid phase discharge path having no bends or turns, with a circumferential component oriented in opposition to a direction of rotation of the bowl.
    Type: Application
    Filed: February 3, 2003
    Publication date: April 15, 2004
    Applicant: Baker Hughes Incorporated
    Inventor: Woon-Fong Leung
  • Publication number: 20040058796
    Abstract: In order to separate solid-liquid mixtures in a solid bowl centrifuge containing a simply designed, adjustable weir for draining the liquid which makes it possible to control or adjust the level of the liquid in the centrifuge basket (10) during the operation of the centrifuge with the least possible expenditure of energy, the invention proposes to realize the adjustable weir in the form of a stationary, i.e., non-rotating, annular cup (20) that is connected to the centrifuge housing (18) and covers the liquid drain openings (13) of the basket (10) from the outside at a certain distance, wherein the annular cup contains at least one through-opening on its circumference, the size of which can be varied, and where the liquid drains into the liquid collection chamber (15) of the centrifuge housing through the aforementioned through-opening.
    Type: Application
    Filed: October 3, 2003
    Publication date: March 25, 2004
    Inventors: Bernward Feldkamp, Reinhold Schlip, Ralf Mueller, Manfred Seifert
  • Publication number: 20040023781
    Abstract: The centrifugal separator (10) has a scraper (60) for peeling and separating the solid content (94) which is accumulated in the vicinity of the peripheral wall (28) of the container (16) in association with the rotation of the container (16). This scraper (60) is provided with a guide portion (62) which changes the flow of a liquid whirling in the annular space (32) in association with the rotation of the container (16) and allows the liquid to flow obliquely and downwardly onto the solid content (94).
    Type: Application
    Filed: May 8, 2003
    Publication date: February 5, 2004
    Inventors: Kei Mukai, Yoshio Nishida
  • Publication number: 20040023780
    Abstract: A centrifugal processing bag, system and method for separating the components of a mixed material is presented. The processing bag includes a hub and a first port for receiving the mixed material, where the first port includes an outlet positioned within the processing bag at a perimeter of the bag. The processing bag also including a second port having a second port inlet spaced proximate the hub and away from a central axis of the hub. The second port directs a separated material collected from the second port inlet out of the processing bag.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 5, 2004
    Inventor: Keith Rosiello
  • Publication number: 20030232711
    Abstract: A centrifuge is provided for recovering material of interest from the interstitial fluids of plant tissues. The centrifuge includes a rotatable centrifuge bowl having a radially outer wall inclined outwardly so that during centrifugation liquid in the bowl climbs the outer wall. The centrifuge bowl is contained in a vacuum sealed housing so that a material of interest contained in the bowl including said liquid can be subjected to a vacuum. A system for automated cleaning of the centrifuge is also provided.
    Type: Application
    Filed: June 17, 2002
    Publication date: December 18, 2003
    Inventors: Bradley I. Berit, Barry Bratcher, R. Barry Holtz
  • Patent number: 6641552
    Abstract: A system compact enough to be located entirely beside the donor's chair, and able to process the blood while the donor is still resting in the chair after having donated the blood. The separated blood components (plasma and red blood cells) may be stored in their individual optimum environments immediately after the whole blood is drawn, and the blood does not need to be transported back to a separation laboratory for processing. The system includes a needle (72) (or other cannula-like device) for insertion into a vein of the donor and drawing whole blood therethrough, a rotor (2a) for holding the blood after it is drawn, and a motor (50) for spinning the rotor so as to cause the blood to separate into components, for example, plasma and red blood cells.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: November 4, 2003
    Assignee: Haemonetics Corporation
    Inventors: Gordon F. Kingsley, Thomas D. Headley, Lise N. Halpern
  • Patent number: 6632191
    Abstract: A system for collecting red blood cells (RBCs) and other blood components that reduces the need for human intervention. A disposable set is provided having a port, an RBC container, a centrifuge rotor having a variable total volume, and a filter, along with tubing connecting the port, the container, the rotor and the filter. A control unit is also provided and includes a spinner in which the rotor may be held, a flow-control arrangement for controlling flow among the various components of the disposable set, and an electronic controller. The whole blood is directed by the flow-control arrangement from the port through the tubing to the rotor. The rotor includes an elastic diaphragm, and the control unit's flow-control arrangement includes a pump or other device for applying a positive and negative pressure to the rotor's elastic diaphragm. The spinner rotates the rotor so as to separate the whole blood into plasma and RBCs.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: October 14, 2003
    Assignee: Haemonetics Corporation
    Inventors: Thomas D. Headley, Edward T. Powers
  • Patent number: 6589155
    Abstract: A belt-driven blood centrifuge with side-mounted drive motor for rotating the centrifuge at a rotation speed selected to separate blood components. The centrifuge includes a drive shaft assembly rotated at an input rotation speed and a rotor assembly rotatably linked to the drive shaft assembly rotated at an output rotation speed twice the input rotational speed. A drive motor is provided with a drive pulley to drive a belt, a chain, and the like to provide the motive force to rotate the drive shaft at the input rotation speed. In one embodiment, a belt is provided to contact both the pulley of the drive motor and an outer surface of a rotatable shell of the drive shaft assembly. A base is included in the centrifuge upon which the drive shaft assembly is mounted. The drive motor is positioned adjacent the drive shaft assembly and mounted on the base.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: July 8, 2003
    Assignee: Medtronic, Inc.
    Inventor: Victor D. Dolecek
  • Patent number: 6530871
    Abstract: A centrifuge, comprising: a centrifuge basket for separating a fed substance to be centrifuged into different constituents; a receptacle surrounding a portion of the basket; a bag insertable into the receptacle, the bag having an exterior wall and an interior for catching at least a portion of the constituents delivered by the centrifuge basket; a space surrounding the bag; and wherein the interior of the bag near an axis of rotation of the centrifuge basket is connected by a hose with the space surrounding the bag. A method of operating the centrifuge including the steps of mounting the receptacle, feeding the substance to be centrifuged, rotating the centrifuge basket and catching solids in the bag while separating the solids and liquid.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: March 11, 2003
    Assignee: Westfalia Separator AG
    Inventors: Wilfried Mackel, Werner Kohlstette, Thomas Kleimann, Willi Niemerg
  • Publication number: 20030008758
    Abstract: A horizontal solid-bowl centrifuges with cleaning-in-place jet nozzles for cleaning the bowl in a manner complying with good manufacturing procedure is provided. The bowl is cleaned by a defined arrangement of the cleaning jet nozzles, as the bowl rotates at a speed insufficient to produce a centrifugal force equal to gravitational acceleration, where gravitational acceleration is equal to 1.0 g. The cleaning liquids are then removed after the bowl stops rotating, at the lowest point of the bowl.
    Type: Application
    Filed: March 22, 2002
    Publication date: January 9, 2003
    Inventors: Achim Astheimer, Peter Kraemer, Dl Wolfgang Sittig, Bernhard Unger, Frank Zwilling
  • Patent number: 6468198
    Abstract: The invention is a method and apparatus for adjusting a liquid content of a liquid and solid mixture withdrawn from a self-discharging centrifugal drum of a separator. The method includes the steps of: feeding a solid and liquid mixture into the separator; rotating the drum; separating the liquid and solid mixture during the rotation; bringing the separator to a halt; aspirating the liquid remaining in the interior of the centrifugal drum until a quantity remains which corresponds to a required consistency of a solid; and emptying the centrifugal drum of the solid with the required consistency from the centrifugal drum at a suitable rotational speed. The apparatus is a separator including: a self-discharging centrifugal drum; withdrawal openings; a solid space and a separating space; a feeding tube; a shutoff element; and a piston-type slide valve. A connection piece for the connection of a suction device is arranged below the shut-off element.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: October 22, 2002
    Assignee: Westfalia Separator AG
    Inventor: Wilfried Mackel
  • Patent number: 6440054
    Abstract: Liquid—liquid extraction apparatus includes a separator tank rotatable about an axis extending through the tank, a tank inlet for a mixture of two liquids of different densities and which are substantially insoluble in each other, a tank outlet on the axis of rotation for the light liquid, and a tank outlet spaced from the axis of rotation for the heavy liquid. In terms of method, a mixture of the two liquids is rotated about an axis extending through the mixture to cause the light liquid to concentrate at the axis of rotation, and to cause the heavy liquid to concentrate at the periphery of the rotating liquid. The light liquid is removed from the body of liquid along a flow path co-linear with the axis, and the heavy liquid is removed from the periphery of the rotating body of liquid.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: August 27, 2002
    Inventor: George M. Galik
  • Patent number: 6379293
    Abstract: A centrifugal extractor for extraction of an organic phase from a liquid mixture, such as liquid radioactive wastes, is disclosed. In the centrifugal extractor, both the separating weir and the divert disk are designed to be adjustable in their vertical positions. The extractor, thus, desirably separates the organic phase, including usable elements in addition to chemically toxic high radioactive elements, from the aqueous phase and desirably controls the reaction time of the two phases regardless of a variation of the mixing ratio and the rotational speed of the two phases. In the centrifugal extractor, a liquid suction and rotation unit sucks and rotates the liquid mixture and separates the organic phase from the aqueous phase while controlling the reaction time of the two phases. A height-adjustable separation weir unit is designed to locate the separating weir at a boundary layer between the two separated phases.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: April 30, 2002
    Assignees: Korea Atomic Energy Research Institute, Korea Electric Power Corporation
    Inventors: Young-Hwan Kim, Ji-Sup Yoon, Jae-Hoo Jung, Seong-Won Park, Hyun-Soo Park
  • Patent number: 6312610
    Abstract: A method for segregating and transporting heavy particles thrown by centrifugal force from a flowing, spinning column of liquid or gas, whereby an outer cylinder whose inner walls present or face the center core with horizontal, circular bands of pyramidal or conical shaped voids, which bands can be vertically stacked to surround a device of any length, and the voids of which present to the heavy particles being thrown from the fluid a receiving surface consisting entirely of outward sloping surfaces, all of which sloped-surface voids accept, accumulate and gravitationally guide said heavy particles towards exit orifices or nozzles, which nozzles penetrate the outer cylinder and together with the sloped voids, permit the continuous, non-mechanically assisted accumulation and ejection of said heavy particles along the entirety of a centrifugal device of any length and thus for any desired duration (or residence time) of fluid flow.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: November 6, 2001
    Assignee: Phase Inc.
    Inventors: Curtis Kirker, Berkeley F. Fuller
  • Patent number: 6290636
    Abstract: The centrifuge continuously separates free flowing substances that have different densities. The centrifuge includes a rotor 14 having a cylindrical drum 16 and a conical drum 18. The rotor wall includes discharge ports 48, 48′, 48″ for a heavy phase and weirs 38 for a light phase arranged on a front end wall 36 of the cylindrical drum. The rotatable scroll conveyor 22 includes a hollow shaft 26 and a helix 24 for transporting the heavy phase toward the discharge ports. A feed pipe 28 is coaxially within the hollow shaft and opens into a chamber 32 within the hollow shaft. A plurality of nozzles each within a respective discharge port in the conical drum and a non-restrictive discharge port 60 in the end section of the conical drum discharge the heavy phase from the centrifuge. The nozzles are preferably arranged in a plurality of circumferential rings.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 18, 2001
    Inventors: Georg Hiller, Jr., Dietmar J. Neidhardt
  • Publication number: 20010011056
    Abstract: Apparatus for the centrifugal separation and the extraction of at least one liquid component (1) and a solid component (2) from a compound product (P), comprising means (200,300,400) for recovery of part of the energy from the extracted liquid component (1).
    Type: Application
    Filed: January 24, 2001
    Publication date: August 2, 2001
    Applicant: NUOVA M.A.I.P. Macchine Agricol Industrial Pieralist S.P.A.
    Inventor: Gennaro Pieralisi
  • Patent number: 6267899
    Abstract: Centrifugation separations apparatus including centrifugation means having an inlet, a liquids discharge and a solids discharge, a deflector operatively associated with the solids discharge, wherein the solids discharge is adapted to operatively discharge solids being discharged from the centrifugation means at a trajectory and the deflector is adapted to interrupt the trajectory to decelerate and change the direction of travel of the solids, or wherein the deflector is operatively associated with the solids discharge and cooperable with solids being discharged from the solids discharge whereby buildup of solids on the deflector is substantially prevented, or wherein the solids discharge includes a lip configuration which causes the trajectories of the discharging crystals to be relatively independent of their size and/or their residual syrup/moisture content, or including support means, such as a spider like construction having one or more webs substantially parallel to the angular motion of the solids being
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: July 31, 2001
    Assignee: STG-FCB Holdings PTY Ltd.
    Inventors: Christopher Roy Greig, Peter James Tait, Russell Kirk
  • Patent number: 6248053
    Abstract: The invention relates to a device and process for centrifugal separation of solid particles from a liquid. The device comprises a vessel rotatable around a vertical axis. The vessel has a separation zone with separation surface elements. The separation surface elements are formed by a plurality of adjacent, axially oriented tubular elements or channels open at both ends. The process is characterized in that the liquid is caused to flow with essentially laminar flow through a plurality of axially oriented, parallel channels and is subjected to a g-number, preferably less than 100, in order to centrifugally deposit the particles on the channel walls.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: June 19, 2001
    Inventors: Lars Ehnström, Hyosong Lee
  • Patent number: 6241901
    Abstract: A centrifuge has a hub and a first bowl section extending about the hub. The first bowl section has a given diameter at a downstream end of a heavy phase transport path along the first bowl section. The centrifuge further comprises a second bowl section having an input end at the downstream end of the first bowl section. The input end of the second bowl section has a diameter which is greater than the diameter of the first bowl section at the downstream end thereof. The input end of the second bowl section is disposed radially outwardly of the first bowl section at the downstream end thereof. A feed accelerator is disposed at the downstream end of the first bowl section, and more particularly between the downstream end of the first bowl section and the input end of the section bowl section, for tangentially accelerating a thickened feed or cake between the downstream end of the first conical bowl section and the input end of the second bowl section.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: June 5, 2001
    Assignee: Baker Hughes Incorporated
    Inventor: Woon-Fong Leung
  • Patent number: 6238329
    Abstract: A machine for separation two liquids of different densities from a mixture has a separation chamber with radially disposed fins that rotates about a central axis. The separation chamber has an outside wall with a first weir extending toward the central axis and spaced from the central axis a distance or radius that is less than the distance of the boundary between the two fluids in the separation chamber. The mixture separates into a first volume of the first fluid and a second volume of the second fluid. The first fluid exits past the first weir. The second fluid passes into a channel or volume and then past a second weir. The channel or volume is sized so that the angular momentum of the second fluid is conserved and develops a force to retain the first fluid and the second fluid in the separation chamber. The separation chamber is in a housing which contains a first collecting chamber to collect the first fluid and a second collecting chamber to collect the second fluid.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: May 29, 2001
    Inventor: Ernest E. Rogers
  • Patent number: 6221315
    Abstract: Apparatus for separating a biological component from a biological fluid are disclosed. The apparatus includes a chamber for receiving a biological fluid including a biological component, and a rotor for creating a centrifugal field within the chamber. A source of particles may be included wherein the particles have a binding site for selectively binding to the biological component. The particles may be aseptically introduced into the chamber. The apparatus may withdraw whole blood from a donor, separate the whole blood to obtain a target cell population and return a selected one of either the target cell population or at least a portion of the whole blood remainder to the donor or patient. A disposable separation inset for use in conjunction with a rotatable separation device such as the apparatus described above may also be provided.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: April 24, 2001
    Assignee: Baxter International Inc.
    Inventors: Richard Giesler, John R. Chapman, Dale R. Ellis, Daniel F. Bischof
  • Patent number: 6203483
    Abstract: Disclosed is a modified centrifugal contactor for separating solutions of near equal density. The modified contactor has a pressure differential establishing means that allows the application of a pressure differential across fluid in the rotor of the contactor. The pressure differential is such that it causes the boundary between solutions of near-equal density to shift, thereby facilitating separation of the phases. Also disclosed is a method of separating solutions of near-equal density.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: March 20, 2001
    Assignee: UT-Battelle, LLC
    Inventors: Joseph F. Birdwell, John D. Randolph, S. Paul Singh
  • Patent number: 6149572
    Abstract: A centrifuge bowl for separating heavier particles from lighter particles and water comprises a first conical bowl wall leading to a pair of annular recesses at actually spaced positions. Each recess is generally re-shaped with an upper side wall, a lower side wall and a base. The base contains a plurality of angularly spaced discharge ducts each having a mouth projecting through the base into the interior of the bowl for collecting the heavier particles. A pinch valve is formed as an integral assembly with the mouth and duct and is mounted within a housing carried within the wall of the bowl. The housing, valve and duct can therefore be removed as a separate assembly by pulling from a chamber within the wall of the bowl. A compression fluid supply duct passes through the wall to communicate with the chamber.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: November 21, 2000
    Inventor: Benjamin Knelson
  • Patent number: 6110096
    Abstract: A decanter centrifuge comprises a bowl rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening at one end and a liquid phase discharge opening. The bowl has a cylindrical portion and a beach portion disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor is at least partially disposed inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor includes a helical screw disposed inside the bowl for scrolling a deposited solids cake layer along the inner surface of the bowl towards the cake discharge opening.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: August 29, 2000
    Assignee: Baker Hughes Incorporated
    Inventors: Woon-Fong Leung, Ascher H. Shapiro
  • Patent number: 6102843
    Abstract: A one-pass centrifuge separator for mixtures of two liquids which may also contain gas. The centrifuge uses separation zones on a rotor's inner wall to improve separation efficiency and minimize turbulent mixing. The zones consist of surface and interface vanes, and baffle plates to control flow at the fluid interface. The zones also retain an open concept to facilitate washing by cleaning fluids which are provided by nozzles installed on a stationary feedpipe mounted along the rotational axis of the centrifuge. A fluid accelerator gradually accelerates the fluid from the feedpipe to the inner wall of the rotor.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: August 15, 2000
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Lonny R. Kelley, Mark E. Ehrhardt, Mukhtiar S. Purewal, Jeffrey W. Frederick, Houston G. Wood, III, James P. Johnston
  • Patent number: 6095965
    Abstract: A centrifugal separator for separating two components of a dry mixture has an annular surface inclined upwardly outwards and having a vertical axis of symmetry and a drive mechanism for rotating the surface around the vertical axis of symmetry. A centrally located feed mechanism feeds the mixture onto the surface. At least a first part of the surface is configured such that particles of one component are retained on the surface while particles of the other component progress upwards across the surface and over the upper edge. The separation process may be based on ridges or barriers which prevent upward movement of small particles, or on frictional differentials between types or shapes of particles. Multiple concentric surfaces may be used to separate mixtures in multiple components.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: August 1, 2000
    Assignee: Sortech Separation Technologies Ltd.
    Inventors: Boris Eiderman, Boris Rozenwald
  • Patent number: 6083147
    Abstract: A device and a process for centrifugal separation of solid particles from a liquid is disclosed. The device comprises a vessel rotatable around a vertical axis. The vessel has a separation zone with separation surface elements. The separation surface elements are formed by a plurality of adjacent, axially oriented tubular elements or channels open at both ends. The process is characterized in that the liquid is caused to flow with essentially laminar flow through a plurality of axially oriented, parallel channels and is subjected to a g-number, preferably less than 100, in order to centrifugally deposit the particles on the channel walls.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: July 4, 2000
    Assignee: Centritech HB
    Inventors: Lars Ehnstrom, Hyosong Lee
  • Patent number: 6059712
    Abstract: The apparatus for the continuous separation of liquid and relatively fine particles from a liquid slurry includes one or more centrifuge vessels disposed about a longitudinal axis of rotation, and a driver for rotating the centrifuge vessel or vessels. A feed inlet introduces the liquid slurry into each centrifuge vessel, each of which extends at an oblique angle to the axis. A first outlet is provided adjacent to the inner end for the lighter liquid component, and a second outlet is provided adjacent to the outer end for the heavier solid particle component. The inlet of the each centrifuge vessel is preferably located between the first end and the second end, and the second outlet preferably comprises a plurality of solids removal capillary passages connected to a continuous solids removal tube, which can be connected to a source of vacuum to form a vacuum chamber for withdrawing the solids. A supernatant liquid collection chamber is also connected to the first outlet for receiving the supernatant liquid.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: May 9, 2000
    Assignee: Lucid Treatment Systems, Inc.
    Inventors: Gary L. Corlett, Glenn A. Roberson, Jr.
  • Patent number: 6015375
    Abstract: A centrifuge has a centrifugal drum with a peeling chamber and a hydrohermetic chamber (locking chamber) (7). The centrifuge is so designed that solids deposited at the periphery (outer bottom 19) of the locking chamber (7) are carried away with the overflow stream of the sealing liquid or/and with the flow of the cleaning medium during CIP method of the space located between the centrifugal drum (2) and the centrifuge housing. A second locking chamber lid (1) is located between a locking disk (9) of the locking chamber (7) and a lid (17) for forming with the first lid a flow channel (20) for carrying away solids deposited on the outer bottom of the locking chamber via an overflow weir (16). The centrifuge is used in the field of separation technology, in particular when high hygienic requirements are applied, e.g. in the field of the foodstuff industry.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: January 18, 2000
    Assignee: Westfalia Separator AG
    Inventor: Reinhard Moss
  • Patent number: 5935051
    Abstract: A separator and a method for quickly separating an aliquot of plasma or serum from cells in a sample of blood is provided herein. The separator includes a housing which defines a separation container, an outlet aperture, a valve which selectively seals the outlet aperture, and a spinner. Initially, the spinner rotates the housing at a separation speed which causes the heavier cells to separate from the serum or plasma. Subsequently, the spinner rotates the housing at a faster, expellant speed which causes the valve to open and the cells to be expelled through the outlet aperture. After the cells have been expelled from the separation container, rotation of the housing is stopped and the serum or plasma is collected from the separation container. Since the separator provided herein does not use a separation gel, the separator is easy to clean and reusable.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: August 10, 1999
    Assignee: Beckman Instruments, Inc.
    Inventor: Michael L. Bell
  • Patent number: 5919124
    Abstract: The apparatus for the continuous separation of liquid and relatively fine particles from a liquid slurry includes one or more centrifuge vessels disposed about a longitudinal axis of rotation, and a driver for rotating the centrifuge vessel or vessels. A feed inlet introduces the liquid slurry into each centrifuge vessel, each of which extends at an oblique angle to the axis. A first outlet is provided adjacent to the inner end for the lighter liquid component, and a second outlet is provided adjacent to the outer end for the heavier solid particle component. The inlet of the each centrifuge vessel is preferably located between the first end and the second end, and the second outlet preferably comprises a plurality of solids removal capillary passages connected to a continuous solids removal tube, which can be connected to a source of vacuum to form a vacuum chamber for withdrawing the solids. A supernatant liquid collection chamber is also connected to the first outlet for receiving the supernatant liquid.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: July 6, 1999
    Assignee: Lucid Treatment Systems, Inc.
    Inventors: Gary L. Corlett, Glenn A. Roberson, Jr.
  • Patent number: 5916083
    Abstract: Rotor for a centrifugal separator, which rotor (1) during operation rotates in a space (4) and inside itself forms a chamber (12) and a passage (7), which extends radially outwardly from the chamber (12) to the outside of the rotor (1).
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: June 29, 1999
    Assignee: Alfa Laval AB
    Inventor: Rolf Bjorkstrom
  • Patent number: 5885202
    Abstract: A solid-bowl centrifuge has a rotatable drum having an interior and a space adjacent to the interior of the drum for receiving separated off liquid conveyed from the drum. A weir disk is disposed between the interior of the drum and the chamber and is rotatable with the drum. Liquid is conveyed past an inner diameter of the weir disk to the space and that determines a level of the liquid in the interior of the drum. Two barrier disks on opposite sides of flat surfaces of the weir disk are gas-tightly joined together by a cylinder extending through the inner diameter of the weir disk. One barrier disk is immersible in the liquid in the interior of the drum and the other barrier disk is immersible in the liquid in the space. The barrier disks and cylinder define a chamber and a gas-supply channel supplies gas to the chamber to vary the pressure therein and thereby vary the level of the liquid in the interior of the drum.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 23, 1999
    Assignee: Westfalia Separator Aktiengesellschaft
    Inventor: Willi Ostkamp
  • Patent number: 5840007
    Abstract: A decanter centrifuge comprises a bowl rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening at one end and a liquid phase discharge opening. The bowl has a cylindrical portion and a beach portion disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor is at least partially disposed inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor includes a helical screw disposed inside the bowl for scrolling a deposited solids cake layer along the inner surface of the bowl towards the cake discharge opening.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: November 24, 1998
    Assignee: Baker Hughes Incorporated
    Inventors: Woon-Fong Leung, Ascher H. Shapiro
  • Patent number: 5788621
    Abstract: A method and apparatus for centrifugal solids separation for use in the drilling industry, concerned with the conservation of drilling mud. The apparatus comprises a rotatable container, a device for inputting used mud to the container preferably with minimal turbulence, a collection device for collecting and compacting separated solids material, a device for wiping separated solids material from the sides of the container and preferably directing this material to the collection a device and an output from the container for cleaned mud. So that the apparatus may be employed for continuous mud cleaning or solids separation, the collection device may be isolated from the container to allow dumping of collected solids material. Where there are multiple collection compartments there may be a synchronised cycle of dumping of the collection device to maintain balance of the container during continuing centrifugal rotation.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: August 4, 1998
    Inventor: Robert Ernest Charles Eady
  • Patent number: 5779619
    Abstract: Centrifugal separator comprising a rotor, which forms an inlet and an outlet chamber (17) surrounding the rotational axis, in which a liquid present therein rotates around the rotational axis with a radially inwardly directed free cylindrical liquid surface. A stationary discharge device (21) extends in the outlet chamber (17) from the rotating liquid body radially inwardly to a central outlet (25) and forms a flow channel (26) with an inlet opening (23).
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: July 14, 1998
    Assignee: Alfa Laval AB
    Inventors: Leonard Borgstrom, Patrik Brehmer, Claes-Goran Carlsson, Peter Franzen, Claes Inge, Torgny Lagerstedt, Hans Moberg
  • Patent number: 5713827
    Abstract: A centrifugal filter device includes a housing having an essentially cylindrical housing wall about an axis of the housing and an annular trough located radially inwardly of the housing wall, a cap fitted to the housing and having a lid spaced from an upper edge of the housing wall, the cap further comprising an annular side wall spaced radially outwardly from the housing wall and defining an annular catchment chamber having an annular tapered deflection surface therein, a first exit port in the side wall of the cap, a second exit port at the trough of the housing, an inner chamber situated within the housing and adapted to rotate about the axis, the inner chamber having an essentially cylindrical wall inwardly spaced from the cylindrical wall of the housing so as to define an annular space therebetween, an internal drain communicating an interior of the chamber with the trough of the housing, and an annular closure element having an opening communicating the interior of the chamber with the annular catchment
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: February 3, 1998
    Assignee: Trylock Pty Ltd
    Inventor: Rowland Alexander Errington
  • Patent number: 5713826
    Abstract: A centrifuge of the type having a rotary basket with a bottom wall, side wall and a top wall with a central opening therein includes a liquid feed pipe extending into the basket through the top opening to a point spaced above the basket bottom wall at the rotary axis thereof for conducting a feed liquid into the basket. A feed accelerator projects from the basket bottom wall opposite the feed pipe. The accelerator rotates with the basket so that, the accelerator will impart radial and angular acceleration to the liquid issuing from the feed pipe so that that liquid is redirected and accelerated toward the basket side wall. The centrifuge also incorporates a liquid drain in the basket bottom wall adjacent to the rotary axis of the basket for draining liquid from the basket when the rotation of the basket is stopped.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: February 3, 1998
    Assignee: Waterlink, Inc.
    Inventor: James D. West
  • Patent number: 5709643
    Abstract: Centrifugal separator comprising a rotor which inside itself forms an inlet chamber (16), a separation chamber (5) and an outlet chamber (12). The outlet chamber (12) is connected to the separation chamber (5) via a passage (13) through which a liquid separated during operation flows into the outlet chamber (12) and in the same forms a rotating liquid body with a radially inwardly directed free liquid surface (14). The outlet chamber is provided with an outlet (19), which is located radially outside the free liquid surface (14). In the outlet chamber (12) at least two wall elements (22) are arranged fixedly connected to the rotor and arranged to form a channel between themselves in order to during operation entrain the separated liquid into the rotation of the rotor and at the same time admit flow of the same radially outwardly in the outlet chamber (12).
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: January 20, 1998
    Assignee: Alfa Laval Separation AB
    Inventors: Leonard Borgstrom, Hans Moberg, Claes-Goran Carlsson, Torgny Lagerstedt, Olle N.ang.bo, Claes Inge, Peter Franzen
  • Patent number: 5695442
    Abstract: A decanter centrifuge comprises a bowl rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening at one end and a liquid phase discharge opening. The bowl has a cylindrical portion and a beach portion disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor is at least partially disposed inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor includes a helical screw disposed inside the bowl for scrolling a deposited solids cake layer along the inner surface of the bowl towards the cake discharge opening.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: December 9, 1997
    Assignee: Baker Hughes Incorporated
    Inventors: Woon-Fong Leung, Ascher H. Shapiro
  • Patent number: 5685819
    Abstract: Discharge passages for concentrated and separated liquids are separately formed in shafts of a rotary bowl 1 and a screw conveyor 2. In an inlet passage of the radial discharge passage leading from the inside of the rotary bowl 1 to the discharge passage in the shaft, an annular space is divided into sectors by a plurality of deceleration vanes 23, 24 which are mounted on the screw conveyor 2 and extend in a radial direction from the axis of the machine.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: November 11, 1997
    Assignee: Tsukishimi Kikai Co., Ltd.
    Inventors: Katsunori Nishida, Keiichiro Miyano, Masaki Iwase, Eiji Ichinose
  • Patent number: 5643169
    Abstract: A decanter centrifuge comprises a bowl and a worm or screw type conveyor. The bowl is rotatable about a longitudinal axis and has a cake discharge opening at one end and a liquid phase discharge opening. The conveyor includes a conveyor hub having at least a portion disposed inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor further includes a helical screw or worm attached to the conveyor hub and disposed inside the bowl for scrolling a cake layer along an inner surface of the bowl towards the cake discharge opening. An adjustable component on the hub forms a gap between the hub and the inner surface of the bowl so that the gap has a size adjustable independently of hub rotation speed. The adjustable gap enables an optimization of the moisture content of cake exiting the bowl at the cake discharge opening for a given solids throughput and cake rheology.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 1, 1997
    Assignee: Baker Hughes Incorporated
    Inventors: Woon-Fong Leung, Ascher H. Shapiro, Robert S. Yarnell
  • Patent number: 5624371
    Abstract: A centrifugal separator comprises a drum (1) rotatable about its axis within which annular walls (10, 20) define discharge chambers (11, 21) at the ends of the drum, from which separated fluids of different specific gravities are discharged by respective scoops (14, 24). Alternatively, annular walls (44, 45 and 47, 49) define both such chambers at one end only of the drum. The dimensions of the annular walls are chosen so that the separator is self-regulating, in that the separated fluids are discharged independently of the proportions of the fluids in the incoming mixture, so that operation of the separator does not have to be controlled in response to sensing of the separation process within the drum.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: April 29, 1997
    Assignee: Framo Developments (UK) Limited
    Inventor: Frank Mohn