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: 5618409
    Abstract: The centrifuge (1) described has at least one device (11,12) designed to control the operation of the centrifuge, the devices being mounted to rotate with the rotating part of the centrifuge and to be operated by a mechanical actuator (13) also rotating with it. Such devices may, for instance, be drain valves, periodically opening discharge valves, sill height adjustment devices, pressure-control devices, temperature-control devices, etc. At least one part of the devices of this centrifuge to be controlled independently of the centrifugal force is designed so that the rotating actuator (13) changes its shape as a function of the temperature and has at least one temperature-specific shape.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: April 8, 1997
    Assignee: FLottweg GmbH
    Inventor: Walter Kreill
  • Patent number: 5611363
    Abstract: A system for removing oil from oil/water or oil/sand or oil/water/sand mixtures. An oil/water mixture is taken from an oil spill on the surface of the water or from other sources such as producing oil wells and is transported to a surge tank where it is agitated and then passed on to a separator which separates the oil from the water. The system also covers separating oil from sand or earth when the spill is on land.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: March 18, 1997
    Assignee: Separation Oil Services, Inc.
    Inventors: Willis R. Campbell, Forrest L. Robinson, Bruce A. Perry, Dan Schwlefert
  • Patent number: 5601524
    Abstract: A centrifugal separator for separating heavy metals from lighter ore includes a bowl rotatable about its axis and defining annular collection areas on the peripheral surface of the bowl at axially spaced positions along the bowl. At the peripheral wall in each area is provided a plurality of angularly spaced discharge openings which are controlled by pinch valves to periodically allow the radial escape of the collected material. The pinch valves of a first area are controlled at different timing to the pinch valves of a second area to vary the concentration of the materials collected in the different areas. The pinch valves are operated by a pressurized liquid system which is fed to the different areas through a swivel coupling mounted at a longitudinal shaft supporting the bowl.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: February 11, 1997
    Inventor: Benjamin Knelson
  • Patent number: 5601523
    Abstract: A centrifuge bowl is used for separating particulate materials of different specific gravity and has a first generally frusto-conical portion of the peripheral wall of the bowl over which the materials are caused to flow, and two axially spaced annular recesses downstream of the first portion and prior to an open mouth of the bowl. The feed materials pass over the peripheral wall causing heavier material to collect within the recesses and the lighter material to discharge through the open mouth. Each recess has a series of angularly spaced discharge ports controlled by pulsed valves. In front of each discharge port is provided a spherical body which directs the material to all sides around the body as it moves towards the discharge port in a generally conical shape. The conical shapes of adjacent discharge ports overlap to provide full discharge of all the material. The first recess acts as a main concentrate collector.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: February 11, 1997
    Inventor: Benjamin V. Knelson
  • Patent number: 5599271
    Abstract: Method in a centrifugal separator of regulating during operation the outlet flow through a stationary discharge device, which is arranged in an outlet chamber, of a separated liquid and a centrifugal separator to carry out the method.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: February 4, 1997
    Assignee: Alfa Laval Separation AB
    Inventor: Jon Eiken
  • Patent number: 5593377
    Abstract: In a solid-jacket centrifuge drum for separating out a liquid phase, a weir is rotatable with the drum around an axis, is disposed in a path of the separated out liquid phase and has at least one channel for the separated out liquid phase. A choke plate regulates flow through the at least one channel in the weir and thereby the level of liquid inside the drum. The choke plate is stationary relative to the rotation of the weir and the drum and is axially displaceable relative to the weir to form a gap therebetween for the separated out liquid phase. The gap has a distance which is varied with the axial displacement of the choke plate.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: January 14, 1997
    Assignee: Westfalia Separator Aktiengesellschaft
    Inventors: Helmut Figgener, Paul Bruning
  • Patent number: 5591340
    Abstract: A centrifugal separator has a housing with a generally cylindrical inner surface defining an inner chamber. A hollow rotor is disposed within the chamber for rotation therein. At least one inlet is provided for introducing a liquid mixture into the annular volume between the rotor and the housing, where it is then directed into the rotor. An upper rotor assembly separates the liquid mixture by phase densities with the disparate components directed to respective outlets. In one embodiment of the invention, the upper rotor assembly includes an easily removable weir ring to facilitate "tuning" of the separation process. The rotor of the separator is mounted on a unitary rotor shaft that extends axially through the separation chamber to upper and lower bearing assemblies in the separator housing.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: January 7, 1997
    Assignee: Costner Industries Nevada, Inc.
    Inventors: David H. Meikrantz, Lawrence L. Macaluso, H. William Sams, III, Charles H. Schardin, Jr., Alfred G. Federici
  • Patent number: 5586965
    Abstract: A centrifuge bowl includes a flat base and a generally conical peripheral wall upstanding from the base. A jacket surrounding the bowl allows injection of water from a chamber between the bowl and the jacket through openings in the peripheral wall into the bowl for fluidization of materials within the bowl. A feed duct extends to the base and discharges feed materials onto the base for moving outwardly onto the peripheral wall and passing over the peripheral wall. A first portion of the peripheral wall is smooth, imperforate and frusto-conical. At the upper edge of the first portion is provided a pair of axially spaced recesses with injection openings at the base of the recesses for the fluidizing water. Heavier materials collect within the recesses and are discharged outwardly through a plurality of controlled discharged openings around the recesses. Lighter materials escape through the open mouth of the bowl.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: December 24, 1996
    Inventor: Benjamin V. Knelson
  • Patent number: 5545119
    Abstract: An apparatus for the centrifugal separation of a solid-liquid mixture including an elongate centrifuge drum rotatable about a central axis, a coaxially located conveyor worm within the drum having worm helix flights on a worm drum therein, an opening for the discharge of a light fraction and an opening for the discharge of a heavy fraction, the opening for the discharge of the light fraction located in a radius from the drum axis less than the radius of the worm drum and the opening for the heavy fraction being located at a radius relative to the axis of the drum less than the radius of the worm drum.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: August 13, 1996
    Assignee: Kloeckner-Humboldt-Deutz Aktiengesellschaft
    Inventors: Reinhold Schilp, Wolfgang Epper
  • Patent number: 5542903
    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: December 17, 1993
    Date of Patent: August 6, 1996
    Assignee: Tsukishima Kikai Co., Ltd.
    Inventors: Katsunori Nishida, Keiichiro Miyano, Masaki Iwase, Eiji Ichinose
  • Patent number: 5518494
    Abstract: A centrifugal separator has a rotor, which forms an inlet chamber, a separation chamber (5) and an outlet chamber (10), in which a liquid, separated during operation, forms a rotating liquid body with a radially inwardly directed free liquid surface. A stationary discharge device (17) is provided together with rods 20 which are arranged to entrain, during the operation of the rotor, the liquid present in the outlet chamber (10) and to admit flow of such liquid radially outwardly to an inlet (19) in the discharge device (17). The rods are distributed around the rotational axis and rotate with the rotor and form flow spaces which extend axially, radially and in the circumferential direction. They entrain the liquid in the outlet chamber (10) efficiently and to admit flow of the liquid radially outwardly to the inlet (19) with reduced risk of air admixture. A wing extending radially and axially in the outlet chamber may also be provided.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: May 21, 1996
    Assignee: Alfa Laval Separation AB
    Inventors: Leonard Borgstrom, Claes-Goran Carlsson, Peter Franzen, Claes Inge, Torgny Lagerstedt, Hans Moberg
  • Patent number: 5490453
    Abstract: An improved centrifugal fat extraction apparatus for removing surface liquid from food which comprises a housing assembly having mounted at its bottom a self-centering drive assembly having a shaft extending vertically from the self-centering drive assembly within the housing assembly, a rotatable spindle mounted onto the shaft, a means for rotating the spindle at a variable speed between 750 and 1200 rpm for approximately a 45 second time span, and a rotatable cylindrical slotted basket capable of holding foods. The self-centering drive assembly prevents undesirable vibration from being imparted to the housing assembly as the result of eccentric loading of the foods into the slotted basket.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: February 13, 1996
    Assignee: SAS TV Products, Inc.
    Inventor: Spencer L. Mackay
  • Patent number: 5484383
    Abstract: An orbital separator for separating denser and lighter components of a mixture employing a separation container having an inlet end and an outlet end. An inlet tube is secured to the separation container inlet end and communicates between the exterior and interior of the separation container. In like manner, an outlet tube is secured to the separation container outlet end and communicates between the exterior and interior of the separation container. The inlet and outlet tubes are coaxial and each are rotationally supported to thereby rotationally support the separation container. Formed in the outlet end of the separation container and surrounding the outlet tube is an annular denser component discharge opening. Positioned externally of the separation container outlet end is a closure member that can be moved towards and away from the discharge opening to thereby vary the area of the discharge opening, so that thereby the performance characteristics of the separator can be varied.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: January 16, 1996
    Assignee: Bardyne, Inc.
    Inventors: Ernest C. Fitch, Jr., Ing T. Hong
  • Patent number: 5462513
    Abstract: Prior centrifugal concentrators for separating higher density particles from a slurry have not combined effective separation of concentrate with continuous discharge of the concentrate. The present invention provides a continuous discharge centrifugal concentrator having a retention zone for accumulating the concentrate in which a plurality of mass-flow hoppers are provided at the retention zone, with flow control devices to control the discharge of concentrate from the hoppers.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: October 31, 1995
    Inventor: Steven A. McAlister
  • Patent number: 5423734
    Abstract: A feed accelerator system for use in a centrifuge, the system comprising a conveyor hub rotatably mounted substantially concentrically within a rotating bowl, the conveyor hub including at least one passageway connecting an inside surface of the conveyor hub to an outside surface of the conveyor hub for a feed slurry exiting the conveyor hub. The passageway may be associated with a variety of feed slurry accelerator enhancements such as a baffle extending into a slurry pool formed on the inside of the conveyor hub, a divider, a U-shaped channel, an extension tube, and/or a flow directing and overspeeding member. These accelerator enhancements may be combined within the passageway or incorporated into a feed slurry accelerating nozzle apparatus removably secured to the passageway. The passageway and/or the nozzle apparatus may include a cross-sectional area having a longer axis approximately parallel to the conveyor hub axis of rotation.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: June 13, 1995
    Assignee: Baker Hughes Incorporated
    Inventor: Woon F. Leung
  • Patent number: 5368541
    Abstract: A method of separately extracting mercury and gold from mine tailings includes a centrifugal separator comprising a centrifuge bowl having a plurality of annular rings on the peripheral surface. An outer bowl or sleeve member provides a jacket from which water is injected through holes in the inner bowl into recesses between the annular rings. Feed materials containing gold and mercury are separated so that the gold and mercury is collected with the heavies in the recesses. The liquid mercury escapes through the holes in the inner bowl onto the inner surface of the outer bowl which is provided with an annular receptacle and is shaped to collect the mercury at the receptacle axially spaced from the open mouth of the bowl. A plurality of outlets in the annular receptacle allow the escape of the mercury into a secondary launder inside the outer launder for the main discharge materials from the open mouth.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: November 29, 1994
    Inventor: Benjamin V. Knelson
  • Patent number: 5354256
    Abstract: An enhanced gravity laminar flow separation system is provided by a conical drum which has a plurality of flow channels along the inside surface of the drum. Feed material for separation is fed into the drum and accelerated by an impeller so as to enter the channels at a feed end at the base of the drum and to move along the channels to a discharge end at the mouth of the drum of increased diameter. Heavies are stripped from the base of the channel and the lights escape from the open mouth of the bowl longitudinally of the channel. The channel changes cross-section from the feed end to the discharge end decreasing in width and increasing in depth by the addition of a V-groove at the base. Tangential forces from the acceleration of the material which act on one side of the channel are balanced by the shape of the channel to provide symmetrical flow.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: October 11, 1994
    Inventor: Benjamin V. Knelson
  • Patent number: 5344381
    Abstract: The equipment of the present invention serves to eliminate light particles, inks and air from a fibrous suspension, and consists of a vertical separating cup which spins at high speed. Feeding of the fibrous suspension and light contaminants takes place through the upper vertical portion, or through the lower vertical portion; the equipment comprises a stabilizer which serves to control the inner turbulence of the suspension, in order for light contaminants to be concentrated at the center.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: September 6, 1994
    Inventor: Luis F. Cabrera y Lopez Caram
  • Patent number: 5338284
    Abstract: A centrifugal separator with substantially continuous discharge of the concentrate comprises a centrifuge drum with axially spaced rings projecting inwardly from the peripheral wall of the drum. The material between the rings is fluidized by injection of water. Each channel between the rings has a number of exit openings at the base of the channel for discharge of the concentrate. Each exit opening includes a pinch valve to restrict the discharge to predetermined time periods. Each exit includes injection openings around the exit for injecting water to replace the material discharged to maintain the fluidization between the channel.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: August 16, 1994
    Inventor: Benjamin Knelson
  • Patent number: 5328441
    Abstract: An imperforate bowl centrifugal separator includes an imperforate separator bowl; a housing for rotatably mounting the bowl including a chamber in which the bowl rotates; an outlet for removing the centrate from the chamber; a discharge port in the housing for removing solids from the bowl; and a gate for closing the discharge port during extraction of centrate from the chamber and opening the discharge port to remove the solids after substantially all of the centrate has been removed from the chamber. The solids and centrate are removed from the same outlet in the bottom of the bowl.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: July 12, 1994
    Assignee: Carr Engineering Associates, Inc.
    Inventor: Robert B. Carr
  • Patent number: 5317964
    Abstract: The apparatus comprises a base unit, a rotatable shaft extending vertically from the base unit, a means for rotating the shaft, and a rotatable cylindrical basket capable of holding fried foods. The basket comprises an horizontally disposed circular bottom piece and a vertically disposed cylindrical piece of porous material being attached at its lower open end to the outer edge of the circular bottom piece to form the vertical wall of the basket. The basket is vertically connectible to and removable from the rotatable shaft. The apparatus further comprises a means for coupling the rotatable shaft to the rotatable basket so that the axis of the shaft is aligned with the axis of the basket. The apparatus also comprises a solid vertical wall surrounding the porous vertical wall of the rotatable basket. The solid vertical wall has an annular channel on the inside of its lower edge so that it has a substantially J-shaped cross section.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: June 7, 1994
    Inventor: Malcolm J. Prudhomme
  • Patent number: 5277809
    Abstract: The invention relates to a process and a centrifuge for removing solids located on a cylindrical casing wall (3) of a rotating centrifuge, in particular solids precipitated in the centrifuge from a liquid-solid mixture, to a solids exit opening (6) by sweeping the entire casing inner wall (9) in the direction of the solids exit opening (6). In order to reduce clogging, it is proposed according to the invention that in each case the casing inner wall (9) is swept in strips up to the solids exit opening (6), during one sweep up to the solids exit opening (6) only a part of the casing inner wall (9) is swept, and after a certain time the entire casing inner wall (9) is swept by strips (11) swept sequentially in time.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: January 11, 1994
    Inventor: Wolfgang Eder
  • Patent number: 5269849
    Abstract: An apparatus and method for reducing sugar, crystal impact damage and lump formation in a sugar centrifugal includes a resilient deflector ring which absorbs most of the impact energy of the crystals while deflecting the crystals out of the path of trailing high speed crystals. An air flow parallel to the local surface of the deflector ring causes vibration of the deflector ring to reduce the tendency for crystals to stick while addition of a supply of water aspirated and atomized by the air flow maintains the ring surface free of syrup build-up which could cause crystals to adhere to the ring surface and form lumps.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: December 14, 1993
    Assignee: Silver-Weibull
    Inventor: Ted D. Milner
  • Patent number: 5267937
    Abstract: A centrifuge with a self-evacuating drum, with a line for feeding the drum with the stock to be centrifuged, with at least one outlet line with an elastic section for extracting a liquid phase from the drum under pressure, and with a mechanism for expelling solids from the drum at prescribed intervals. The elastic section is accommodated in an air-tight housing. The housing communicates with a compressor through a line. The line accommodates a valve that opens prior to every solids expulsion and subjects the elastic section to pressure from outside, compressing it in response to the reduction in pressure accompanying the solids expulsion and forcing as much product from the elastic section as solids are expelled from the drum.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: December 7, 1993
    Assignee: Westfalia Separator AG
    Inventors: Karl-Heinz Zettier, Siegfried Smigielski
  • Patent number: 5263921
    Abstract: A centrifugal separator in which a wash fluid zone is formed within the confines of an annular weir, with excess wash fluids passing via a spillway to an excess wash fluid outlet. Recyclable fluids are forced into a wash fluid/recyclable fluid interface on top of the wash fluid zone by centrifugal force with recyclable fluids being skimmed from the wash fluid/recyclable fluid interface through a recyclable fluid outlet. Solids are propelled by centrifugal force outwardly toward interior sidewalls and washed down sloped interior sidewalls toward a solids outlet by wash fluids fed continuously in through a wash fluids inlet. A rotating shaft is provided having a plurality of arms which extend to immediately adjacent the solids outlet. The arms have paddle shaped extremities.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: November 23, 1993
    Inventor: Earl Gingras
  • Patent number: 5261869
    Abstract: A decanter centrifuge including a discontinuous screw conveyor having flights only within the generally cylindrical portion of the centrifuge bowl. A restricting disc is provided adjacent to the heavy phase material discharge ports such that the restriction contacts the build-up of heavy phase within the portion of the bowl where the flights are discontinuous.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: November 16, 1993
    Assignee: Alfa Laval Separation, Inc.
    Inventors: John W. Caldwell, Raymond S. Lemmerman
  • Patent number: 5259828
    Abstract: A worm centrifuge having a rotatable drum and a rotatable worm therein each independently rotatable at different speeds, adjustable weir plates at one end on the drum adjacent liquid fraction discharge openings, a ring seal including first and second rings in the region of the liquid discharge openings with one ring on the worm and the other ring on the drum, annular anti-wear protection segments on the seal ring on the auger with the segments on carriers which are removable through an end wall of the drum for replacement and for assimilating wear of material flowing through the liquid discharge openings wherein the wear on the seal ring rotating with the conveyor worm is avoided due to the anti-wear protection segments detachably joined to the seal ring.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: November 9, 1993
    Assignee: Kloeckner-Humboldt-Deutz AG
    Inventor: Bernd Schlieperskoetter
  • Patent number: 5259829
    Abstract: Apparatus for separating oil and water from a stream of fluid may include a stationary housing in which is centrally disposed for rotation therein a chamber assembly including an upper and lower chamber. A plurality of U-tube assemblies extend radially outward of the chamber assembly providing a plurality of U-tube paths which are inclined downwardly from the chamber assembly. A power device rotates the chamber assembly and the U-tube assemblies subjecting the stream of fluid to centrifugal forces and separating oil and water into the upper and lower chambers, respectively, for exit therefrom.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: November 9, 1993
    Inventor: Cornelis F. H. VanEgmond
  • Patent number: 5257968
    Abstract: A decanter centrifuge having an inflatable dam for controlling the pond level. Inflation of an annular bladder adjacent to the liquid discharge opening controls the radial height of the pond surface within the bowl of the centrifuge.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: November 2, 1993
    Assignee: Alfa Laval Separation Inc.
    Inventor: John W. Caldwell
  • Patent number: 5254075
    Abstract: A centrifugal extractor for making liquid-liquid extraction by bringing an organic phase and an aqueous phase into mutual contact and utilizing centrifugal force. A rotor rotating at a high speed is disposed inside a cylindrical casing having inlets for both phases. Draw ports for both phases are disposed at an upper portion of the rotor. An organic phase/aqueous phase mixture mixed at the bottom of the casing enters the rotor from the bottom of the rotor, and is subjected to phase separation by centrifugal force. The separated phases are withdrawn from respective draw ports. Part of the organic phase discharged from the organic phase draw port is refluxed to the bottom of the casing by a reflux cover fitted to the upper part of the rotor. The flow rate of the organic phase thus refluxed is added to the flow rate of the organic phase introduced from outside into the casing.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: October 19, 1993
    Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
    Inventors: Shin-ichi Nemoto, Ryo Shimizu, Hiroshi Takeda, Tomio Kawata
  • Patent number: 5252209
    Abstract: A centrifugal separator for the separation a slurry into a light phase fraction and a heavy phase fraction including a rotatable shell having a cylindrical portion and a conical portion with a rotatable auger therein and a light phase opening at one end and a heavy phase opening at a second end sized to throttle the flow of light phase liquid and heavy phase liquid and sized in the cross-sectional area ratio of A/B so that the discharge from the separator will continue to be in the ratio of A/B regardless of throughput and in one form the separator has a second heavy phase opening in the cylindrical portion and in another form, an annular barrier vane on the auger blocking flow of liquid fraction toward the heavy fraction opening.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: October 12, 1993
    Assignee: Kloeckner-Humboldt-Deutz AG
    Inventor: Eric Retter
  • Patent number: 5250180
    Abstract: An apparatus for recovering oil from used lubricant includes a centrifugal separation unit having a centrifugal tank for receiving and separating used lubricant and a scraping unit having blades provided in the tank for scraping contaminant from the inner side of the wall of the tank. A synchronizing mechanism is provided for simultaneously rotating the tank and the blades at different rates to cause the blades to scrape the contaminant.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: October 5, 1993
    Assignee: FWU Kuang Enterprises Co., Ltd.
    Inventor: Yun-Te Chang
  • Patent number: 5244502
    Abstract: A continuously operable centrifuge for spinning off sugar massecuite has an upwardly conically expanded strainer basket (20) mounted for rotation about a vertical axis (16). A downwardly conically expanding massecuite distributor (40) rotating with the basket reaches into a floor region of the strainer basket substantially coaxially to the strainer basket. The lower rim of the distributor forms a throw-off edge. Inside and in the upper region of the massecuite distributor (40), a distributing cup (30) is for distributing massecuite. The peripheral wall of the massecuite distributor (40) is formed by several ring elements (41), (42, 43) which partly overlap in the axial direction leaving an annular gap (44, 45). The product distributor is surrounded by a downwardly conically expanding stationary bell (51) which forms a further gap or gap space between itself and the rotating rings.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: September 14, 1993
    Assignee: Braunschweigische Maschinenbauanstalt AG
    Inventors: Helmut Schaper, Heinrich Kurland
  • Patent number: 5244584
    Abstract: A method and apparatus for the separation of a slurry into a light fraction and a heavier fraction with a rotatable drum separator having a rotatable worm therein driven independently of the drum with an inlet for the slurry into the drum, an outlet for a liquid fraction, and outlet openings adjacent one end of the drum such as in the conical portion for the removal of the heavier abrasive sludge fraction with the openings extending at an angle opposite the direction of rotation of the drum and having wear-resistant inserts in the opening attached to webs beside the openings and removable by being pivoted out through the openings.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: September 14, 1993
    Assignee: Kloeckner-Humboldt-Deutz AG
    Inventor: Bernd Schlieperskoetter
  • Patent number: 5217428
    Abstract: An apparatus for controlling the level of liquid in a centrifugal separator drum by regulating the flow of liquid out of the drum. The drum includes a plurality of circumferentially spaced openings in a radial end wall of the drum. The openings have movable weir plates in one form controlling the openings with the weir plates movable and positionable in a radial direction by axially movable linkage. In another form, a conduit passage leads from an end opening. By controlling the flow through the openings in the end wall, the liquid level is functionally controlled within the drum. The control mechanisms are situated externally of the drum for ease of repair and to provide control which can be continually monitored.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: June 8, 1993
    Assignee: Kloeckner-Humboldt-Deutz Aktiengesellschaft
    Inventors: Reinhold Schlip, Wolfgang Epper
  • Patent number: 5190515
    Abstract: An apparatus for degassing a continuously flowing liquid stream comprising an air-tight housing, in which is mounted for rotation a centrifuge bowl of circular cross-section and having an inner surface for spreading centrifugally impelled liquid to be degassed and an annular peripheral trough for retaining centrifugally impelled degassed liquid. The liquid stream is fed into the bowl and the degassed liquid is withdrawn through a tube extending from an exit line outside the housing to an open end of elongate cross-section which is positioned within the trough of the bowl and is immersible in the degassed liquid. The apparatus further provides for measuring the pressure of the exiting degassed liquid, the pressure measurement being used to regulate the flow of liquid into the bowl so as to maintain a substantially constant level of liquid therein.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: March 2, 1993
    Assignee: Eastman Kodak Company
    Inventors: Donald E. Eaton, Errol S. Francis, Eric L. Dillenbeck, Lawrence D. Meston, Walter Johannes
  • Patent number: 5169377
    Abstract: A rotary centrifuge for the separation of substances at different density having an outer cylindrical housing and a worm within the housing and the worm and housing driven at different rotational speeds, the housing having an opening for the discharge of the heavier fraction with the opening controlled by an external control element preferably stationarily supported and connected by a linkage to a movable valve member for controlling the opening, preferably a ring which moves axially to change the size of an annular discharge gap between the ring and a circular discharge opening in the end wall of the drum, but the opening can also be in the form of axial radial facing openings controlled by a movable valve member.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: December 8, 1992
    Assignee: Kloeckner-Humboldt-Deutz Aktiengesellschaft
    Inventors: Reinhold Schlip, Wolfgang Epper
  • Patent number: 5163895
    Abstract: A centrifugal drier for a product, comprises a horizontally supported rotating drive shaft including an axial passageway adapted to be a filling pipe for the product; a drum having a closed end secured to one end of the drive shaft and an open end; a conical filter mounted inside the drum, tapering from narrow to wide toward the drum open end; a rotatably mounted baffle disk being displaceable between a closed position sealing the drum open end and an open position for adjustable discharge of the dried product, the filter and the baffle disk defining a work area, the axial passageway communicating with the work area; an annular duct operably associated with the drum open end and cooperating with the baffle disk for receiving the dried product when the baffle disk is in the open position; and a backflusher disposed outside the filter for backflushing the filter with fluid.
    Type: Grant
    Filed: April 23, 1991
    Date of Patent: November 17, 1992
    Inventor: Hans-Joachim Titus
  • Patent number: 5160311
    Abstract: Centrifugal separator having a discharge device for the transformation of kinetic energy of a liquid rotating in a chamber around a rotational axis to pressure energy. The device comprises an element for the discharge of liquid out of the chamber, which element has a surface (20) surrounding the rotational axis arranged to be so located in the rotating liquid body that liquid flows in a predetermined direction along and in contact with the surface (20). The discharge element forms at least one outlet channel (21), which has an inlet opening (22) located in said surface (20) and which from this inlet opening (22) extends in the flow direction. Seen in the flow direction the inlet opening (22) is delimited by two opposite side edges (23, 24) and a cross edge (25) located downstream of the side edges.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: November 3, 1992
    Assignee: Alfa-Laval Separation AB
    Inventors: Claes Inge, Peter Franzen, Torgny Lagerstedt, Leonard Borgstrom, Claes-Goran Carlsson, Hans Moberg, Olle Nabo
  • Patent number: 5160609
    Abstract: A separator comprises a frame supporting a closed cylindrical drum, a motor for rotating the drum about a central, longitudinal axis, an inlet through which a liquid from which constituents are to be separated is introduced into the drum, and an outlet through which relatively clean liquid is dischargeable from the drum. During the separating process, centrifugal force causes a layer of the heavier constituents to collect on the interior surface of the drum, displacing the relatively clean liquid into an annular layer situated concentrically with and between the constituent layer and the entering volume of liquid, such that the contents of the annular layer is separately dischargeable from the drum in a continuous manner.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: November 3, 1992
    Inventor: Jan W. Van Der Herberg
  • Patent number: 5147426
    Abstract: As gas-liquid centrifugal separator includes a housing having a gas separating chamber that communicates with a source of a gas sample. A rotating plate can be positioned within the gas separating chamber for the centrifugal separation of liquids and/or solid particulates from the sample gas. The gas separating chamber is maintained at a pressure differential below that of the source of the gas sample. The discharge passageway communicates with the separating chamber to remove the separated liquid and solid particulates. A pressure regulator assembly is connected to the discharge passageway and a source of a pressurized gas in order to be responsive to variations in the pressure status of the discharge passageway and thereby vary the flow of the secondary pressurized gas to render the pressure level in the discharge passage constant to enable a constant effluence of the separated liquid and solid particulates.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: September 15, 1992
    Assignee: Horiba, Ltd.
    Inventors: Hideki Koike, Junji Aoki
  • Patent number: 5147280
    Abstract: A centrifugal separator having a device for the transformation of kinetic energy of a liquid rotating in a chamber (12) to pressure energy comprising a discharge element (17) for the discharge of liquid out of the chamber. The discharge element (17) has a surface (20) arranged to be so located in the rotating liquid body that liquid flows in a predetermined direction along and in contact with the surface (20). The discharge element (17) forms an outlet channel (19) having an inlet opening (22) located in said surface (20), and limited downstreams by a cross edge (25) from which the outlet channel (19) extends a bit essentially in said predetermined direction. An increased outlet pressure is achieved by the fact that at least two passages (27, 28) are arranged in the discharge element (17) connecting a part each of the outlet channel located at axial ends of the cross edge (25), respectively, to the chamber (12) in such a manner that liquid flows through the passages (27, 28 ).
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: September 15, 1992
    Assignee: Alfa-Lavel Separation AB
    Inventors: Claes-Goran Carlsson, Claes Inge, Peter Franzen, Torgny Lagerstedt, Leonard Borgstrom, Hans Moberg, Olle Nabo
  • Patent number: 5098368
    Abstract: A centrifugal apparatus including an annular shell of flexible material with annular end rings and means for driving the shell in rotation through the end rings, an external discharge roller in engagement with the outer surface of the shell and directing material toward a discharge nozzle within the shell with the nozzle leading outwardly for delivery of the material from the shell. In one form, the ends of the shell are connected to the rigid ends by rings of flexible material. An arrangement is provided for applying axial tension to the flexible material of the shell.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: March 24, 1992
    Assignee: Kloeckner-Humboldt-Deutz Aktiengesellschaft
    Inventor: Paul Schmidt
  • Patent number: 5090953
    Abstract: A sensor is provided for the level of liquid or the surface characteristics of the solids and liquid layers in a centrifuge drum and controls a scoop by terminating the removal of the liquid when a surface-characteristic change representing the solids layer is reached or when the rate of change in the level within the drum approaches zero.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: February 25, 1992
    Assignee: Krauss-Maffei Aktiengesellschaft
    Inventors: Otto Buttner, Bruno Hegnauer
  • Patent number: 5024648
    Abstract: The present invention concerns a centrifugal separator comprising a rotor, which forms an inlet (12) for a liquid mixture, a separation chamber (5), connected to the inlet (12), for separation of components in a liquid formed mixture and a discharge chamber (10). The discharge chamber is delimited by two axially separated end walls (12, 13) and a circumferential wall (14) extending between these and has an inlet (11, 11a) connected to the separation chamber (5), an outlet in a discharge device (17) arranged in the discharge chamber (10), and means, which together with parts of the inner surfaces of the discharge chamber (10) are arranged, during operation of the rotor, to entrain into rotation a component present in the discharge chamber (10) so that this forms a rotating liquid body. This liquid body has a radially inwards directed, essentially cylindrical, free liquid surface radially inside the circumferential wall (14).
    Type: Grant
    Filed: January 17, 1990
    Date of Patent: June 18, 1991
    Assignee: Alfa-Laval Separation AB
    Inventors: Claes Inge, Peter Franzen, Torgny Lagerstedt, Leonard Borgstrom, Claes-Goran Carlsson, Hans Moberg, Olle
  • Patent number: 4978370
    Abstract: In connection with reduction of the pressure of newly produced oil, i.e. a mixture of hydrocarbon compounds, this conventionally is performed stepwise, a momentary pressure drop occurring at each stage.According to the invention it is suggested that oil is caused to flow radially inward in a chamber (12), which is formed by a rotating vessel (1) and which is only partly filled with rotating oil, whereby the pressure drop in the oil can occur relatively slowly. A free liquid surface is maintained in the chamber (12), and a certain gas pressure is maintained in the liquid free part thereof, while evaporated hydrocarbon compounds are removed through a central gas outlet (18).
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: December 18, 1990
    Assignee: Alfa-Laval Separation AB
    Inventor: Kjell Klintenstedt
  • Patent number: 4976678
    Abstract: A centrifugal separator which enables extraction of particles as concentrated liquid of a uniform concentration under a low pressure without damaging to the particles and is particularly suitable for extraction of weak cells such as animal cells. The centrifugal separator includes a plurality of particle collecting chambers (104: 104a) partially defined by an inner wall face (121) of a rotor (103) the diameter of which increases substantially continuously and suddenly comparing with the diameter of another adjacent portion for the inner wall face of the rotor. Particles centrifugally separated from liquid in a separating chamber (109) in the rotor are introduced into the particle collecting chambers in which they are accelerated suddenly to form soil suspension having an increased fluidity. The soil suspension is then introduced into horizontally extending deriving pipes (105: 105a: 105b: 105c: 105d: 105e) of a small sectional area and then extracted to the outside by way of an extracting pipe (118).
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: December 11, 1990
    Assignee: Meiji Milk Products Co., Ltd.
    Inventors: Yutaka Suginaka, Shigeru Taniguchi
  • Patent number: 4966576
    Abstract: A continuously operating centrifuge drum for concentrating suspended solids. The solids that precipitate in a stack of disks accumulate in a solids space and are diverted into a receiving chamber through mouthpieces. The mouthpieces contain throttle bores and communicate with the periphery of the solids space. To improve the known centrifuge drum to the extent that an optimal solids concentration can be obtained at low expense with no detriment to the clarified phase, there are secondary mouthpieces that also contain throttle bores, that communicate with a radially inner zone of the solids space, and that another receiving chamber is associated with. Since the volume of solids that can be diverted through the primary mouthpieces is less than the volume of solids separated in the drum, the solids flow out of the primary mouthpieces at the maximum attainable concentration, whereas the excess solids flow out through the secondary mouthpieces.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: October 30, 1990
    Assignee: Westfalia Separator AG
    Inventors: Dieter Schulz, Ulrich Wrede, Wilfried Mackel
  • Patent number: 4964845
    Abstract: To separate minerals, they are made up into a slurry A applied to a hollow tapered cylinder 301 spinning on its axis to generate 10 g centrifugal force.The cylinder 301 is also subjected to axial vibration at 5 to 10 Hz. The cylinder widens at a half-angle of, and its axis is inclined at upwardly in the direction of widening.A film of slurry is held centrifugally to the internal surface of the cylinder and kept in suspension by the vibration. The denser (i.e. higher specific gravity) particles in the slurry tend to move preferentially radially outwardly (centrifugally) and to move downwardly in the boundary layer (under Earth's gravity). The action of the washing water B is to displace waste accidentally entrained with the higher-specific-gravity-particles.The valuable higher-specific-gravity particles overflow downwardly continuously at C and are collected.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: October 23, 1990
    Assignee: National Research Development Corporation
    Inventor: Richard H. Mozley
  • Patent number: 4961723
    Abstract: The intake space of a centrifuge drum is divided into a vestibule with ribs and an intake chamber without ribs. The vestibule communicates with the intake chamber through an annular gap between the outside diameter of a disk secured to an intake pipe and the inside diameter of the intake space. The intake chamber communicates with a set of disks through channels. The diameter D.sub.K of the intake chamber at the level of the channels is longer than the diameter D.sub.F that must be maintained at the upper surface of the centrifugate in a skimming chamber during operation. Since the incoming centrifugate does not rotate in the intake chamber and since no rotational pressure is accordingly generated, the intake pressure in the intake pipe is transmitted when the intake chamber is full to the centrifugate in the intake chamber, until the requisite level of centrifugate in the skimming chamber is attained.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: October 9, 1990
    Assignee: Westfalia Separator AG
    Inventors: Paul Bruning, Wilfried Mackel, Ulrich Wrede, Willi Niemerg