Static Scraper Or The Like For Engaging Material In Moving Bowl Patents (Class 494/58)
  • Publication number: 20150148213
    Abstract: The rotary bowl (1) of this centrifugal separator is lined with conical structures divided into sectors (7) separated by angularly offset gaps (9) so as to promote a regular spiral fluid flow therein, which is laminar and enhances separation efficiency significantly: in the case of two-phase or three-phase suspensions, a “cake” is obtained on the side wall (8). A scraper (15) rotating at a slightly different speed may be added to enable simultaneously routing of the solid cake to the outlet and continuous processing.
    Type: Application
    Filed: June 27, 2013
    Publication date: May 28, 2015
    Inventors: David Chezaud, Jean-Pierre Feraud, Joël Robin, Tojonirinia Randriamanantena
  • Publication number: 20140256528
    Abstract: A discontinuous centrifuge consists of a rotatable centrifuge drum incorporating a drive spindle, a casing and a base. A hub of the centrifuge drum comprises a plurality of arms for the indirect or direct connection of the casing of the centrifuge drum to the drive spindle of the centrifuge drum. A scraper serves for scraping a product off the inner wall of the casing of the rotatable centrifuge drum. The scraper comprises an element which is pivotal about an axis, which axis extends in parallel with the axis of rotation of the centrifuge drum. The element comprises a blade which extends over almost the entire height of the centrifuge drum and makes contact with the product after the pivotal movement. The scraper is not moveable vertically. The arms of the hub have upper surfaces which are located below the drum base. The scraper is mounted independently of the swinging suspension of the centrifuge drum.
    Type: Application
    Filed: November 20, 2012
    Publication date: September 11, 2014
    Applicant: BMA Braunschweigische Maschinenbauanstalt AG
    Inventors: Hans-Heinrich Westendarp, Dirk Spangenberg
  • Publication number: 20110028296
    Abstract: A centrifuge concentrator bowl has feed deposited onto a base of the bowl and includes a plurality of recesses at axially spaced positions along a peripheral wall of the bowl. The peripheral wall is formed of a rigid metal skeleton frame of rings and upstanding support members on which is molded a urethane liner material to form an integral structure with the rings located at ribs between the recesses. A fluidization water injection system includes an outer container on the bowl, which also acts as a clamping assembly and a plurality of liquid entry openings through the peripheral wall at the base of the recesses allowing flexing of the peripheral wall in response to changes in pressure in the fluidizing liquid. The bowl is formed of separate sections defined by a bottom concave base section and the cast skeleton wall all clamped together to allow replacement of the separate parts.
    Type: Application
    Filed: July 13, 2010
    Publication date: February 3, 2011
    Inventors: Edwin John William Zonneveld, John Douglas Corsan, Michael McLeavy, Michael John Fullam
  • Publication number: 20110003677
    Abstract: A centrifuge for separating solid-liquid mixtures including: a rotating bowl having a head wall with at least one drain opening for clarified liquid, said bowl having a rotational axis; a weir plate fixed to the head wall of the bowl and rotating with bowl, wherein the weir plate is aligned with the at least one drain opening; a choke plate coupled to and rotating with the rotating bowl, the choke plate having surface axially aligned with the drain opening or the weir plate, wherein said choke plate is movable axially with respect to the head wall, and a gap having between the drain opening or the weir plate, wherein the gap has a radially inward inlet receiving the clarified liquid from the bowl and a radially outward outlet for discharging the clarified liquid from the bowl.
    Type: Application
    Filed: June 3, 2010
    Publication date: January 6, 2011
    Applicant: ANDRITZ S.A.S.
    Inventors: Gernot Krammer, Laurentiu Pasol, Jean-Marc Huyghe
  • Publication number: 20080248940
    Abstract: A solid-bowl centrifuge comprising, a centrifugal drum rotatable about a horizontal axis of rotation, the centrifugal drum including a weir to drain a liquid out of the centrifugal drum, the weir including a passage having at least one passage opening in an axial end region of the centrifugal drum that includes a drum lid: a deflector plate arranged outside the centrifugal drum and in front of the drum lid, the deflector plate being stationary during an operation of the centrifugal drum and widening at least in sections as the deflector plate extends away from the centrifugal drum: and the deflector plate including an interior jacket, and a distance of the interior jacket from the horizontal axis of rotation not being constant but widening.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 9, 2008
    Inventors: Helmut Figgener, Markus Fleuter, Ulrich Horbach, Ludger Horstkotter, Martin Overberg, Stefan Terholsen
  • Patent number: 7033311
    Abstract: A centrifuge having a drum rotatable in a predetermined direction about a drum axis has a cleaning device with a cleaning shaft extending generally parallel to the drum axis into the drum along a shaft axis. A pair of elongated slat-shaped cutters have inner ends fixed on the shaft, outer ends, and project radially outward of the shaft axis from the shaft. The inner ends are separated by a relatively narrow space, and the cutters diverge from their inner ends toward their outer ends. The shaft can be moved such that the cutters are displaced between a standby position offset from the drum and a cleaning position closely juxtaposed therewith. A cleaning liquid is fed to each cutter such that it flows along the cutters.
    Type: Grant
    Filed: October 6, 2001
    Date of Patent: April 25, 2006
    Inventor: Guntram Krettek
  • Patent number: 6991738
    Abstract: A process includes coating a cylinder having an inner wall and a cylinder axis with a gel coating on the inner wall. Then a specimen mixture including solvent is made to flow through the cylinder while the cylinder is being continuously rotated. The specimen mixture is initially directed to flow along the cylinder axis and such that specimen particles from the specimen mixture are accelerated off the cylinder axis toward the inner wall, so as to form a film of specimen particles embedded into the gel coating.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: January 31, 2006
    Assignee: University of Washington
    Inventors: Mark E. Fauver, Alan C. Nelson
  • Publication number: 20040259711
    Abstract: Disclosed is a wet classification device in the form of a centrifuge provided with a stationary outer housing, a centrifugal drum arranged in the outer housing, a device for cleaning sediment deposited on the wall of the centrifugal drum, and inlets and outlets. The cleaning device comprises a shaft which extends into the centrifugal drum and has cutting devices arranged on the periphery thereof, in addition to a device for introducing a dispersing fluid in the centrifugal drum. The cutting devices are configured and arranged in such a way that turbulence can be created in the infed dispersing fluid, thereby resulting in a wash-out effect with respect to the sediment cake and facilitating the removal thereof.
    Type: Application
    Filed: March 30, 2004
    Publication date: December 23, 2004
    Inventor: Guntram Krettek
  • Patent number: 6776752
    Abstract: A centrifugal separator provides for discharge of solids by either an axial-motion scraper or a piston/extrusion assembly. The axial-motion scraper (80) is used with hard-packed or friable solids, and includes and integral feed liquid accelerator and feed holes. The piston/extrusion assembly is used with pasty solids, and includes a piston (12) extending into a bowl (10) and having openings (45) permitting fluid communication across the piston. After separation is complete, a centrate valve (34) closes one end of the bowl, and the piston is moved axially in the bowl by an actuator. A bowl suspension employs a spherical mounting structure (96) and a short spindle (98). A bearing (100) and the spindle (102) of the bowl are mounted within the bearing housing. The suspension is retained by a ring and retaining member secured to the separator in compressive contact with the spherical portion of the bearing housing.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: August 17, 2004
    Assignee: Wagner Development, Inc.
    Inventor: Robert B. Carr
  • 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: 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
  • 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: 20030195105
    Abstract: A centrifugal separator provides for automatic discharge of solids by either an axial-motion scraper or a piston/extrusion assembly. The axial-motion scraper is used with hard-packed or friable solids, and includes an integral feed liquid accelerator and feed holes. The piston/extrusion assembly is used with pasty solids, and includes a piston extending into a separator bowl and having openings permitting fluid communication across the piston. After high-speed separation is complete, a centrate valve closes one end of the bowl, and the piston is moved axially in the bowl by an actuator. Accumulated solids are scraped from the sides of the bowl and extruded out of the piston openings for discharge from the bowl. A bowl suspension employs a spherical mounting structure and a short, stiff spindle. A spherical portion of a bearing housing is mounted in a spherical mounting region at one end of the separator, with a cylindrical portion of the bearing housing extending along the rotational axis.
    Type: Application
    Filed: April 14, 2003
    Publication date: October 16, 2003
    Applicant: R. B. CARR ENGINEERING, INC.
    Inventor: Robert B. Carr
  • Patent number: 6632166
    Abstract: A centrifugal separator includes a rotatable separator bowl, a hollow shaft spindle in the bowl along the rotational axis of the bowl, and a variable-drive motor for selectively rotating the bowl at a high separating speed and at a lower scraping speed. A scraper and feed assembly including scraper blades is supported by the shaft spindle within the separator bowl. A feed liquid is supplied to the separator bowl via the scraper and feed assembly at substantially the interior surface of the separator bowl. The scraper assembly rotates with the bowl at the separating speed while centrate is drawn off. While the bowl is operated at the scraping speed, the scraper assembly is prevented from rotating with the bowl and is moved axially with respect to the bowl to scrape accumulated solids from the interior surface of the bowl. Loosened solids exit the centrifuge via a discharge port at the bottom of the bowl.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: October 14, 2003
    Inventor: Robert B. Carr
  • Patent number: 6478163
    Abstract: The screw conveyor 200A includes a first flight 211 and a second flight 212 for transporting cake to cake discharging ports 105 in the small diameter section 103. Each flight 211, 212 has a small clearance portion 211a, 212a defining a small clearance d1 and a large clearance portion 211b, 212b defining a large clearance d2 between the tip of the flight and the inner peripheral surface of the small diameter section 103. The whole region of the large clearance portion 211b, 212b of each flight 211, 212 overlaps with the small clearance portion 212a, 211a of another flight 212, 211 at the same point in the direction of the rotation axis C.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: November 12, 2002
    Assignee: Tomoe Engineering Co., Ltd.
    Inventor: Takaharu Otsuka
  • Patent number: 6439394
    Abstract: A system for dry separation of powders into at least two fractions including a powder to be separated and a separator including a hollow body rotating about an axis and defining a cavity having a powder engaging surface, the surface of the cavity being a surface of revolution which rotates about the axis, an upper edge of the cavity having a greater diameter than a lower edge, a system controlling the rotation of the body, at least one feeder continuously feeding dry powder into a feeding zone adjacent to the cavity surface near the lower edge, the length of the feeding zone being at least an order of magnitude less than a circumference of the cavity surface of the lower edge, at least one discharge device continuously discharging the powder from the cavity surface, the at least one discharge device including a body arranged along substantially the entire length of the generatrix of the cavity surface and located immediately in front of the feeding zone aligned with the rotation of the cavity surface, a first
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: August 27, 2002
    Assignee: SorTech Separation Technologies, Ltd.
    Inventors: Boris Eiderman, Haim Levy, Moshe Voskoboinik
  • Patent number: 6425849
    Abstract: A solid bowl centrifuge with liquid release during rotation includes a frame, solid bowl, drive device, scraper assembly, slurry spray, liquid collection trough, and speed control circuitry. 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 by the frame. The liquid collection trough is disposed around the liquid evacuation chamber. The drive device causes the solid bowl to rotate. The speed control circuit controls the speed of the drive device. Slurry is sprayed on to the wall of the centrifuge chamber while in rotation. The speed of the solid bowl is reduced to allow liquid to exit the centrifuge chamber through the liquid evacuation chamber into the liquid collection trough. The speed of the solid bowl is further reduced and the scraper assembly is activated to remove the solid material from the wall of the centrifuge chamber.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: July 30, 2002
    Inventor: Ronald D. Benson
  • Publication number: 20020016243
    Abstract: A centrifugal separator is provided which maximizes solids recovery yield and separated solids dryness with minimal user intervention. The centrifugal separator includes a rotatable separator bowl, which is selectively rotatable and supported by a hollow shaft spindle. A scraper and feed assembly including a plurality of scraper blades is supported by the shaft spindle within the separator bowl. A feed liquid is supplied to the separator bowl from the scraper blades at substantially the interior surface of the separator bowl so that the feed liquid is gradually accelerated upon entering the separator bowl. High speed operation of the centrifugal separator is performed to generate separation forces as high as 30,000 g's at the interior surface of the separator bowl. This allows the feed liquid to be safely and effectively separated at lower stress levels within the separator bowl.
    Type: Application
    Filed: June 29, 2001
    Publication date: February 7, 2002
    Inventor: Robert B. Carr
  • Patent number: 6224532
    Abstract: An improved blade design and method for enhancing the efficiency of operation of a centrifuge is disclosed based on measuring a varying value of the load on the centrifuge as the flow of contaminated fluid is injected into the centrifuge. The centrifuge has a plurality of blades with radially overlapping edges to keep the fluid being centrifuged compartmentalized and thus quiet for maximum efficiency. Additionally, the scraping blade assembly has blades which are angled in the scraping direction to force the solids towards the exit of the centrifuge, whether that be at the bottom or the top. A programmable logic controller monitors the load on the drive motor and compares a baseline value of load after accelerating the rotor to speed to the value of load while the contaminated fluid is injected into the rotor.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: May 1, 2001
    Inventor: Jeffery N. Beattey
  • Patent number: 6177021
    Abstract: The invention relates to a method and a device for clearing product, e.g., sugar, from the inside of a centrifuge basket of a discontinues centrifuge. A scraper blade, which is attached to a clearing rod, is pivoted toward the spun-off layer of product. The scraper blade scrapes off the product with a cutting edge, which is directed in a direction that is opposite to the direction of rotation of the basket. To optimize the product removal, it is preferable if the scraper blade, after it has been pivoted inward, contacts the product over virtually the entire height of the basket and at the same time scrapes off the product from the layer of product which is rotating at the clearing rotational speed in layers over the entire height of the basket. Once the product has been substantially completely removed from the basket, the scraper blade is pivoted back away from the basket wall.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: January 23, 2001
    Assignee: Braunschweigische Maschinenbauanstalt AG
    Inventors: Siegfried Matusch, Mario Winnemuth
  • Patent number: 6145669
    Abstract: A centrifuge includes a conveyor for moving cake along a cake flow path towards a cake discharge opening and further includes a baffle mounted to the conveyor and disposed along the cake flow path. The baffle is provided on an upstream side, facing substantially away from the discharge opening, with a concave profile or surface. This concave profile or surface serves to direct a portion of the cake, which is headed downstream along the cake flow path, into a recirculation or churning path directed partly back towards a pool. The recirculation or churning of the particulate material facilitates an enhanced washing thereof and improves the removal of valuable solutes or undesirable impurities from the cake.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: November 14, 2000
    Assignee: Baker Hughes Incorporated
    Inventor: Woon-Fong Leung
  • Patent number: 5743840
    Abstract: A centrifuge of the type including a housing and a rotatable bowl, and including a heating jacket located therebetween. The heating jacket is established through inflatable seals which selectively seal a space located between the bowl and the housing. The seals may be inflated when the bowl is stationary. A heating fluid is then introduced into the heating jacket so that collected solids in the bowl may be heated and dried. A vacuum may be applied to the bowl to assist in the removal of moisture from the solids. A scraper assembly, including at least one scraper, is disposed within the bowl. The scraper assembly pivots between a stowed position and an operative position to remove the solid that has collected on the inside wall surface of the bowl.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: April 28, 1998
    Assignee: Carr Separations, Inc.
    Inventor: Robert B. Carr
  • Patent number: 5733238
    Abstract: A scraper assembly for removing the collected solids component of a feed material from an interior wall surface of a centrifugal separator bowl comprises a supporting shaft positioned within the bowl along a vertically disposed longitudinal axis. The supporting shaft is pivotal between a stowed position and an operational position. At least two longitudinally spaced scraper blades are attached to the supporting shaft along the longitudinal axis and are adapted to contact the solids component when the support shaft is in the operational position. An upper scraper blade is angularly offset with respect to the lower scraper blade along the longitudinal axis so that any collected solids component removed by the upper scraper blade may freely drop clear of the lower scraper blade.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: March 31, 1998
    Assignee: Carr Separations, Inc.
    Inventor: Robert B. Carr
  • Patent number: 5468389
    Abstract: The application discloses double-acting pusher centrifuges comprising a rotatable sieve drum (6) which carries out separation of a mixture (17) into liquid and solid matter portion (40) in the form of filter cakes (14, 15). A centrally located pusher floor device, movable to-and-fro along the axis (9) of the sieve drum (6), pushes out alternately to one side and the other by its outer annular region the filter cake (14) deposited since the last clearing of the drum region. The pusher floor is provided at the height of the filter cake with a plurality of axial throughflow openings (12), which are fed through associated radial feeding openings (13) with a mixture. Deflection into the axial throughflow openings takes place automatically according to the resistance at the outlet which is large on the pushing-out side against the filter cake (14) to be moved, while on the opposite side behind the retreating pusher floor an empty space (16) is created into which the mixture can flow.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: November 21, 1995
    Assignee: Sulzer-Escher Wysse AG
    Inventor: Niklaus Keller
  • Patent number: 5425698
    Abstract: A centrifuge separator system includes a centrifuge bowl for receiving the feed to be separated; a flexible suspension for rotatably, flexibly supporting the bowl; and a retractable restrainer device for constraining the bowl during scraping action of a scraper blade to remove solids from the bowl. Alternatively, the bowl could be radially and rotationally constrained and the scraper rotated to remove solids from the bowl.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: June 20, 1995
    Assignee: Carr Engineering Associates, Inc.
    Inventor: Robert B. Carr
  • Patent number: 5356367
    Abstract: A centrifuge separator system includes a centrifuge bowl for receiving the feed to be separated; a flexible suspension for rotatably, flexibly supporting the bowl; and a retractable restrainer device for constraining the bowl during scraping action of a scraper blade to remove solids from the bowl. Alternatively, the bowl could be radially and rotationally constrained and the scraper rotated to remove solids from the bowl.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: October 18, 1994
    Assignee: Carr Engineering Associates, Inc.
    Inventor: Robert B. Carr
  • 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: 5275727
    Abstract: An indexable separator screen for use with a rotatable centrifugal separator device in which the screen is adapted to be moved relative to the bowl so that one or more wear areas on the screen can be moved from at least a first position to a second position relative to the bowl.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: January 4, 1994
    Assignee: Inter-Source Recovery Systems, Inc.
    Inventor: Robert J. Nemedi
  • Patent number: 5252208
    Abstract: A liner or wrap for use in the scroll or discharge housing of a centrifugal separator device. The wrap comprises a one-piece, elongated strip of material which is releasably secured to the interior wall which is replaceable in the event of excessive wear. The wrap is compressible and can be placed into the separator device without having to remove the blade assemblies. The releasable wrap is seated against the discharge housing wall contiguous to blades which are rotatable in the discharge housing.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: October 12, 1993
    Assignee: Inter-Source Recovery Systems, Inc.
    Inventor: William D. Nemedi
  • Patent number: 5252202
    Abstract: A water treatment method and device can perform a regeneration treatment of the muddy water once used in a water excavation work to decrease its specific gravity for reuse in the water excavation work, and a dehydration treatment of various waste waters such as muddy water from the water excavation work and industrial waste water for final disposal.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: October 12, 1993
    Assignee: Daiyo Kiko Industry, Inc.
    Inventor: Kaoru Hirose
  • Patent number: 5199938
    Abstract: A centrifuge drum for concentrating suspended solids, which are conveyed through channels out of an outer solids space in the drum and into a radially inner peeling chamber, whence they are diverted by a peeler and by an associated concentrate line. A separated clear phase is continuously extracted from the interior of the drum by another peeler and by an associated clear-phase line. The object is to prevent the concentrated solids from heating up undesirably even when their volume is small. There is an opening-and-closing communicating line between the concentrate line and the clear-phase line and an opening-and-closing recirculation line extending into the first peeling chamber from the clear-phase line. The communicating line and the recirculation line are closed to divert the solids and opened to discontinue the diversion.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: April 6, 1993
    Assignee: Westfalia Separator AG
    Inventors: Werner Kohlstette, Aloys Bokamp, Friedhelm Siegmann
  • Patent number: 5182031
    Abstract: The device comprises a closed chamber (1) equipped with an inlet pipe (3) for the aerated liquid, an outlet pipe (4) for the deaerated liquid, and an air evacuation pipe (5); and a rotor having a shaft extending into the chamber. The shaft carries means (7) for centrifugation of the liquid and means (8,9,10) for intensive agitation of the centrifuged liquid.The device works according to the following process: continuously, the liquid is introduced into the closed chamber and it is vigorously centrifuged there in with the aid of mechanical means (7) and simultaneously subjected to intensive agitation with the aid of second mechanical means (8,9,10).The released air gathers freely at the center of the chamber whence it is evacuated, as the deaereated liquid is evacuated through the outlet pipe.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: January 26, 1993
    Assignee: E & M Lamort (Societe Anonyme)
    Inventor: Jean-Pierre Lamort
  • Patent number: 5066271
    Abstract: A centrifuge has a generlly stationary and closed housing, a drum rotatable in the housing about a drum axis and having an end wall and an outer drum wall, a blade extending generally axially in the housing generally parallel to the drum wall, and a blade holder having an inner end carrying the blade and an outer end projecting through the housing end wall out of the housing. Seals snugly engaged between the outer end and the housing hermetically seal the housing around the holder and a guide fixed on the end wall supports the outer holder end on the housing for sliding movement of the holder and blade on the housing in an adjustment direction generally radial of the drum axis. An actuator engaged between the housing and the outer holder end displaces the holder and blade in the adjustment direction relative to the housing.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: November 19, 1991
    Assignee: Krupp Industrietechnik GmbH
    Inventors: Guntram Krettek, Wilhelm Schmitz
  • Patent number: 5024649
    Abstract: A centrifuge bowl head including a bowl head plate, a bowl spoke attached to an outer circumference of the bowl plate, and a bowl spoke plow attached to the bowl spoke, the bowl spoke plow impinging upon a wearing material at an angle less than seventy-five degrees.A bowl head further including a bowl head plow connected to the bowl head plate, the bowl spoke plow having an additional directing angle, the bowl spoke plow being of unitary construction and the bowl spokes defining discharge ports, the area of the bowl spokes forming a ratio with the area of the discharge ports to allow material under the bowl spokes to have an included angle of 120 degrees or less.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: June 18, 1991
    Assignee: Bird Machine Company
    Inventor: Clement V. Smith
  • Patent number: 4898571
    Abstract: A method and apparatus for separating mixtures of different densities into a lighter phase and a heavier phase including a rotary drum providing a cylindrical settling sump at the outer wall, a displacement member rotatably located within the drum forming a settling sump between the displacement member and the drum wall, a discharge element for lighter phase material spaced radially inwardly from the settling sump, a discharge conductor for heavier phase material leading from the settling sump at the deepest location at the outer circumference of the drum, and a compressed air conduit connected to the discharge for heavier phase material aiding in the removal thereof, and vanes on the displacement member aiding in movement of the material through the drum.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: February 6, 1990
    Assignee: Klockner-Humboldt-Deutz Aktiengesellschaft
    Inventors: Wolfgang Epper, Hans-H. Gildemeister
  • Patent number: 4840119
    Abstract: A tomato-squeezing device includes a bowl-shaped container for collecting the juice, in which a motor-driven basket having a perforated peripheral wall and entrainment formations in the form of curved blades on its base wall is rotatably mounted. A shaped cover intended for insertion into the basket has a system of lateral and base walls which define, in addition to an inner waste-collection chamber, a squeezing duct converging generally from an entry region with a duct for the supply of the tomatoes to be squeezed towards a terminal region having an aperture which communicates with the waste-collection chamber.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: June 20, 1989
    Assignee: Girmi S.P.A. Corso Matteoth
    Inventor: Carlo Caldi
  • Patent number: 4818296
    Abstract: A scraper for a sugar centrifuge comprises a scraper blade mounted on an arm which is moved down into and pivoted within the centrifugal bowl, such that the edge of the scraper blade is moved against but out of contact with the bowl wall for scraping off the sugar adhering to the bowl wall. After the scraping edge, the scraper blade has an afterscraper in direct or indirect contact with the bowl wall. The afterscraper comprises in one embodiment a block whose boundary plane facing the scraping edge forms an acute angle with the tangential plane along the line of contact of the block with the bowl wall.
    Type: Grant
    Filed: November 27, 1987
    Date of Patent: April 4, 1989
    Assignee: Nils Weibull AB
    Inventors: Conny Hejman, Laszlo Koran, Bo Mossheden
  • Patent number: 4753633
    Abstract: A fluid stream solids separator provides a curved flow confining chamber to cause heavier constituents in a fluid stream, or slurry, flowing in the resulting curved path in the chamber to migrate radially outward with time and distance travelled. At least one skimmer blade is provided to protrude some distance into the stream from the radially outer flow boundary. The blade skims a strata of the heavier constituents from the stream and directs skimmed products into a separate exit flow path. A series of skimmer blades can be used to skim consecutive strata from the main stream. Fluid flow confining chambers of both mushroom and cylindrical shape are provided. Adjustment means, optionally provided, move the input guiding surfaces to change velocity and move the skimmer blades to change the thickness of strata extracted from the main stream.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: June 28, 1988
    Assignee: Stephen R. Callegari, Sr.
    Inventors: Stephen R. Callegari, Sr., Mitchell G. Labiche
  • Patent number: 4718887
    Abstract: In a vertical centrifugal separator having a basket and a skimmer, laminar flow occurs at the bottom of an upper skimming disk and extends over the skimming-disk shaft into an annular catch chamber. Liquid-diversion channels leads from the catch chamber into an intake. Although the product is fed into the intake under higher-than-atmospheric pressure, the catch chamber, which is at atmospheric pressure, empties through the liquid-diversion channels because the high rate of flow in the intake produces an injector effect.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: January 12, 1988
    Assignee: Westfalia Separator AG
    Inventor: Michael L. A. Gunn
  • Patent number: 4718886
    Abstract: A continuous-operation centrifuge bowl for concentrating suspended solids. The separated solids are conveyed through channels provided with nozzle-like orifices from the periphery of the bowl to a skimming chamber located in the diameter of an incomplete circle that is shorter than the outside diameter of the bowl. The concentrate is diverted out under pressure by means of a skimmer. Each channel communicates through a communicating channel with a distribution chamber, into which some of the diverted-out solids are returned. To create a centrifuge bowl in which the concentrate that is to be recirculated never leaves the vicinity of the bowl, there is another skimmer in the skimming chamber that returns some of the concentrate conveyed into the skimming chamber directly back into the distribution chamber.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: January 12, 1988
    Assignee: Westfalia Separator AG
    Inventor: Wilfried Mackel
  • Patent number: 4685899
    Abstract: The solid jacket centrifuge is a plural chamber centrifuge (1). A housing (2) is, together with the centrifuge, stationarily supported, noting that a carrier (6) for cylindrical mantle surfaces (7 and 8) is provided within the housing (2). The cylindrical mantle surfaces (7 and 8) delimit annular chambers (9 and 10) and are shiftable in the direction of the axis of the shaft (3). There is further provided a screw conveyor (12) for introducing the material to be dewatered. The material to be dewatered enters the first annular chamber (9) via radial channels (15). By shifting the cylindrical mantle surface (7) in the axial direction, the material is discharged in a radial direction into the concentric greater annular chamber (10). When subsequently the mantle surface (8) is moved in the axial direction, discharge is again effected in the radial direction.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: August 11, 1987
    Assignee: Voest-Alpine Aktiengesellschaft
    Inventors: Vilim Cvitas, Karl Faltejsek, Reinhart Hanke, Alois Janusch, Gerhard Larch
  • Patent number: 4652254
    Abstract: A centrifugal separator is disclosed which is capable of carrying out the discharge of substantially all solid matter formed by the liquid-removing of stock liquid by suction. The centrifugal separator includes an annular recess provided at the bottom of a rotatable basket to receive solid matter scraped by a scraper and a solid matter discharge pipe having a solid matter intake inserted in the recess of the basket to discharge the solid matter received in the recess therethrough to the exterior of the basket.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: March 24, 1987
    Assignee: Matsumoto Machine Mfg., Co., Ltd.
    Inventor: Takashi Matsumoto
  • Patent number: 4648864
    Abstract: A method of separating solid particles present in a liquid in which the solid particles float by subjecting the liquid to centrifugal force in a chamber thereby causing the solid particles to move radially inwardly and produce a pack of solid particles while the liquid freed of solid particles flows radially outwardly; continuously withdrawing liquid freed of solid particles from the chamber; and continuously removing solid particles from the pack.Apparatus for centrifugal separation of solid particles from a liquid in which they are buoyant, comprising a chamber adapted to be rotated about an axis; a conduit to continuously feed liquid containing the solid particles to the chamber; a conduit to continuously withdraw liquid substantially free of solid particles from the chamber; and a scraper to continuously remove solid particles from a pack of solid particles which forms in the chamber as a result of centrifugal force when the chamber is rapidly rotated.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: March 10, 1987
    Assignee: Chicago Bridge & Iron Company
    Inventors: Timothy J. Evans, Richard J. Kooy
  • Patent number: 4631048
    Abstract: A method and an apparatus for pneumatically evacuating a vertical centrifuge (12), the drying gas moving as a secondary flow (54) being converted--prior to its combination with the mixture of product and gas conveyed through the discharge pipe--into a turbulent longitudinal flow essentially enclosing the discharge pipe as far as its downstream end, in order to prevent caking of the centrifuged material within the discharge pipe or in conveying lines (20) attached thereto and also to shorten the length of the drying pipe.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: December 23, 1986
    Assignee: Krauss-Maffei Aktiengesellschaft
    Inventor: Hans-Joachim Titus
  • Patent number: 4493768
    Abstract: The twin pusher centrifuge comprises a sieve or filter drum having discharge openings on both sides thereof. At the center of the sieve or filter drum there is provided a pusher rotating at a rotational speed which differs from the rotational speed of the sieve or filter drum. The pusher contains pushing surfaces which are inclined at an angle relative to the direction of product movement. Product infeed pipes open to the rear of the pushing surfaces. These pushing surfaces are alternatingly positioned at opposite inclinations or comprise two pushing surfaces directed at opposite inclinations with respect to one another. Due to such an arrangement the product which is infed to the center of the sieve or filter drum is pushed from such center or central region of the drum towards both sides thereof in the direction of the discharge openings. An energy-saving and jerk-free operation of the centrifuge is thus obtained while employing a particularly simple construction of centrifuge.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: January 15, 1985
    Assignee: Sulzer-Escher Wyss Ltd.
    Inventors: Vaclav Kubr, Bruno Mulhaupt, Hansjoachim Paschedag
  • Patent number: 4493769
    Abstract: The twin pusher centrifuge contains a sieve or filter drum having discharge openings at both of its ends. At the center of the sieve or filter drum there is arranged an inclined pusher or thrust floor member. This pusher floor member rotates at a rotational speed differing from the rotational speed of the sieve or filter drum. Consequently, the pusher floor member performs a wobbling or wobble movement between two extreme positions. Due to the wobbling or wobble movement the centrifuged product is pushed towards the two ends of the sieve or filter drum. The product infeed opens within a central aperture formed in the pusher floor member, whereby the product is uniformly infed on both sides of the pusher floor member. The product infeed occurs either in a continuous or periodic fashion. In this manner an energy-saving jerk-free operation of the centrifuge is achieved using a particularly simple construction.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: January 15, 1985
    Assignee: Sulzer-Escher Wyss Ltd.
    Inventors: Hansjoachim Paschedag, Bruno Mulhaupt, Vaclav Kubr