Comprising Plurality Of Elements, Each Concentrically Encircling Axis Of Bowl And Spaced Therealong Patents (Class 494/68)
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Patent number: 10471440Abstract: A centrifugal separator and a method for separation of particles from a gas stream is disclosed. The separator includes a frame, a gas inlet and a gas outlet. A centrifugal rotor is arranged to be rotatable in the frame around a rotational axis and includes a separating member. A central gas chamber in the rotor communicates with a radially inner portion of the separating member and the gas outlet. A space surrounding the rotor communicates with a radially outer portion of the separating member and the gas inlet. A drive provides rotation of the centrifugal rotor for separating particles from the gas stream being conducted from the space surrounding the rotor, through the separation member and towards the central gas chamber. A ring-formed sealing arranged between and in sealing contact with the first frame portion and the centrifugal rotor.Type: GrantFiled: November 17, 2015Date of Patent: November 12, 2019Assignee: ALFA LAVAL CORPORATE ABInventors: Thomas Eliasson, Per Fonser
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Patent number: 9885265Abstract: An internal combustion engine crankcase ventilation rotating coalescer includes an annual rotating coalescing filter element, an inlet port supplying blow by gas from the crankcase to the hollow interior of the annular rotating coalescing filter element, and an outlet port delivering clean separated, air from the exterior of the rotating element. The direction of flow by gas inside-out, radially, outwardly from the hollow interior to the exterior.Type: GrantFiled: July 1, 2014Date of Patent: February 6, 2018Assignee: Cummins Filtration IP Inc.Inventors: Brian W. Schwandt, Scott P. Heckel, Saru Dawar, Chirag D. Parikh, Christopher E. Holm, Peter K. Herman, Gregory W. Hoverson, Rohit Sharma, Benoit Le Roux, Jean-Luc Guichaoua, Shiming Feng, Gerard Malgorn, Arun Janakiraman, Jerald J. Moy, Himani Deshpande, Barry M. Verdegan, Howard E. Tews, Roger L. Zoch
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Patent number: 9724625Abstract: An in-line centrifuge-separator pump includes a shaft, a shroud, and a plurality of spaced-apart corrugated, and concentrically disposed separator structures. The shaft is adapted to receive a drive torque and is configured, upon receipt thereof, to rotate. The shroud is spaced apart from and is coupled to the shaft to be rotated thereby. The separator structures are at least partially disposed within the shroud and are coupled to both the shroud and the shaft to simultaneously rotate therewith. Each separator structure has a plurality of perforations formed therein.Type: GrantFiled: April 14, 2015Date of Patent: August 8, 2017Assignee: HONEYWELL INTERNATIONAL INC.Inventor: Charles Lo
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Patent number: 8549890Abstract: The invention refers to a method and a press tool for manufacturing a separating disk adapted to be included in a disk package of a centrifuge rotor of a centrifugal separator. The separating disk extends around an axis of rotation and has a tapering shape with an inner surface and an outer surface along the axis of rotation. A blank of a material is provided. A central opening is made in the blank. The blank is positioned in a charging position by means of a projecting central portion. The blank is pressed against the first tool part having a shape corresponding to the tapering shape of the separating disk.Type: GrantFiled: September 30, 2009Date of Patent: October 8, 2013Assignee: Alfa Laval Corporate ABInventors: Kjel Klintenstedt, Sven Olov Olsson, Lars Johan Rudman
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Patent number: 8308626Abstract: A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing wherein the rotor unit is disposed about a central axis of rotation, an inlet for supply of a mixture of components to be separated, at least one outlet for a component separated during operation, whereby the rotor unit, at least parts of which are made of metal, comprises a separating chamber formed inside the rotor unit, an inlet chamber connected to the inlet and the separating chamber, is formed radially within said separating chamber and is usually shielded from the separating chamber, at least one outlet connected to the separating chamber, a plurality of separating discs disposed at a distance axially from one another in said separating chamber coaxially with the axis of rotation, at least a number of the metal parts of said rotor unit are undetachably joined together to form a composite assembly.Type: GrantFiled: March 29, 2007Date of Patent: November 13, 2012Assignee: Alfa Laval Corporate ABInventor: Kjell Klintenstedt
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Publication number: 20120077662Abstract: A method and apparatus for continuous removal of submicron sized artificial oxygen carriers (rAOC) and other materials such as cancer cells and bacteria from blood and other liquids. A centrifuge rotor having a curved shape is offset on a spinning rotor base and creates contiguous areas of low to high centrifugal force depending on the distances from the axis of the rotor base. This creates a density gradient field that separates materials of different densities input to the centrifuge that exit via different outputs. A monitor detects any red blood cells (RBC) with the rAOC before they exit the centrifuge. If there are any RBC detected logic circuitry changes the speed of rotation of the rotor, and the flow rate of pumps inputting and removing separated blood and rAOC to and from the centrifuge until there are no RBC in the rAOC exiting the centrifuge.Type: ApplicationFiled: August 24, 2010Publication date: March 29, 2012Inventors: Agnes Ostafin, Hiroshi Mizukami
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Patent number: 8020498Abstract: The teachings of the present disclosure provide methods and apparatus for enhanced incineration. A method for improving the performance of an incinerator may comprise separating one or more substances from a process fluid using a classifying centrifuge, ejecting a first substance from the classifying centrifuge, the first substance having characteristics optimized for incineration, incinerating the first substance, and using heat generated from the incineration of the first substance to enhance the combustion efficiency of an additional substance separated from the process fluid.Type: GrantFiled: May 1, 2008Date of Patent: September 20, 2011Assignee: Phase Inc.Inventors: William A. Cavaliere, Berkeley F. Fuller
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Publication number: 20110212821Abstract: A centrifuge, such as a continuously working separator, includes a drum having a vertical rotational axis, a single or double conical inner jacket, an inlet pipe, and a distributor into which the inlet pipe opens. The distributor includes at least two distributor channels distributed about a circumference of the distributor. The centrifuge further includes a disk package including separator disks.Type: ApplicationFiled: May 11, 2009Publication date: September 1, 2011Applicant: GEA WESTFALIA SEPARATOR GMBHInventors: Wilfried Mackel, Helga Tietz
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Patent number: 7790468Abstract: A test object receptacle, capable of measuring a test object in a wide range of concentrations with good accuracy and within a short time, contains a plurality of fine protruding portions inside grooves. The test object receptacle can fix antigens, antibodies and test objects faster than without the protruding portions. Furthermore, the protruding portions are so formed that the surface area thereof increases gradually to the downstream with respect to the movement direction of the test object in the grooves, the detection intensity (intensity of color development) of the test object is not saturated downstream of the grooves even when the test object has a high concentration. For this reason, the test object can be detected within a short time and the measurements can be conducted within a wide concentration range.Type: GrantFiled: March 4, 2005Date of Patent: September 7, 2010Assignee: Brother Kogyo Kabushiki KaishaInventors: Chisato Yoshimura, Hideo Nakano, Takanori Ishishika
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Patent number: 7527587Abstract: A centrifugal separator includes devices for light matter extraction and for heavy matter extraction. Each embodiment provides for a plurality, e.g., two or more stacked or layered chambers, and connected to a central compartment of the chambers is a rotating drive shaft. In the light matter extraction, a central conduit feeds fluid input into the lower chamber. An upper portion of the lower chamber communicates with the lower portion of a mid chamber via a port formed in a plate dividing the chambers. The upper portion of the mid chamber communicates with the lower portion of an upper chamber via a port formed in a plate dividing the chambers. The chambers can be fixably connected to one another. In the heavy matter extraction an initial feed conduit feeds fluid into the upper chamber.Type: GrantFiled: April 17, 2007Date of Patent: May 5, 2009Inventor: Henry J. Laughlin
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Publication number: 20080015099Abstract: A separator including a vertical axis of rotation, a drum having solids discharge openings and a conical centrifugal space, and a disc stack located in the conical centrifugal space. Also included is a plurality of conical discs super-imposed on one another and having disc bores forming at least one rising channel in the disc stack. Further included is a drum, a distributor and a lower base section which expands radially, and on which lower base section are one or more distributor channels.Type: ApplicationFiled: August 4, 2004Publication date: January 17, 2008Inventor: Holger Heinrich
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Patent number: 6969343Abstract: A centrifuge, comprising a distributor for introducing material to be centrifuged and a sieve system having a plurality of axially mutually offset membrane plates, the membrane plates being arranged radially with respect to the distributor and having at least two axially-spaced membrane disks. The sieve system is arranged such that a flow directions of material to be centrifuged emerging from the distributor and a flow direction of particles deposited on the membrane plates are identical. Alos included is centrifugal drum having a centrifugal compartment with the sieve system arranged therein and a piston slide valve for closing the centrifugal drum. The invention is also a method for cleaning the centrifuge, the steps comprising: opening a piston slide valve, thereby allowing a return flow of liquid through the sieeve system; and removeing one or more of substances baked to the sieve system and impurities from the sieve system.Type: GrantFiled: May 30, 2001Date of Patent: November 29, 2005Assignee: Westfalia Separator Food Tec GmbHInventors: Wilfried Mackel, Jochen Hamatschek
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Patent number: 6939286Abstract: An imperforate bowl centrifuge for phase separation employing a rotatable outer cylinder having an interior wall with a plurality of indentations each with an orifice, and an outer wall with heavy phase waste routing channels leading from the orifices to a waste control valve. Separated heavy phase particles collect in the channels and flow by force of pressure, and exit through the waste control valve at one end of the outer cylinder when it is opened to release the waste. An outlet for the separated light phase fluid is disposed at another end of the outer cylinder. The channels in the outer wall may be axially or angularly disposed to force the separated heavy phase toward the waste control valve.Type: GrantFiled: April 29, 2002Date of Patent: September 6, 2005Assignee: Archon Technologies Inc.Inventor: Elman Dail Hurdlow
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Patent number: 6743632Abstract: Centrifugal analyzer and method for staining biological or non-biological samples in microgravity, wherein the method utilizes an increase in weight of a fluid sample as a function of g-load, to overcome cohesive and frictional forces from preventing its movement in a preselected direction. Apparatus is characterized by plural specimen reservoirs and channels in a slide, each channel being of differing cross-section, wherein respective samples are selectively dispensed, from the reservoirs in response to an imposed g-factor, precedent to sample staining. Within the method, one thus employs microscope slides which define channels, each being of a differing cross-section dimension relative to others. In combination therewith, centrifugal slide mounting apparatus controllably imposes g-vectors of differing magnitudes within a defined structure of the centrifuge such as a chip array.Type: GrantFiled: March 14, 2001Date of Patent: June 1, 2004Assignee: Universities Space Research AssociationInventors: Mark S. F. Clarke, Daniel L. Feeback
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Publication number: 20040097358Abstract: A filter may have a housing with an inlet and an outlet. A shaft may be rotatably supported in the housing. A rotor may be attached to the shaft, the rotor having an inlet and an outlet. A plurality of members may be attached to the rotor, and a plurality of chambers may be defined in the rotor. The plurality of chambers are placed relative to the members to direct fluid in successive relation across the plurality of members as the fluid commutes between the inlet and the outlet of the rotor.Type: ApplicationFiled: November 20, 2002Publication date: May 20, 2004Inventor: Thomas J. Hajek
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Patent number: 6652439Abstract: A self-driven centrifuge for separating particulate matter out of a circulating liquid includes a base plate and a rotor shell. The base plate has a center tube extending therefrom along a longitudinal axis. The center tube is constructed and arranged to deliver fluid containing particulate matter. A rotor shell has an inner cavity and a plurality of spiral vanes extending along the longitudinal axis within the inner cavity. The spiral vanes extend spirally around the center tube and the spiral vanes are integrally formed with the rotor shell. In one form, spiral vanes are also formed on the base plate and are nested in between the spiral vanes of the rotor shell.Type: GrantFiled: July 20, 2001Date of Patent: November 25, 2003Assignee: Fleetguard, Inc.Inventors: Peter K. Herman, Kevin South, Hendrik N. Amirkhanian, Richard Jensen
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Patent number: 6551230Abstract: A self-driven centrifuge for separating particulate matter out of a circulating liquid includes a stand pipe that is constructed and arranged to deliver fluid. A vane assembly is adapted to receive fluid from the stand pipe. The vane assembly includes a liner and a plurality of vanes. The liner defines an inner cavity and the vanes extends within this inner cavity. Each of the vanes has a radially outer edge portion and integrally formed with the liner and an opposite free edge. The vanes are oriented in a parallel relationship with the stand pipe, and the free edges of the vanes define a stand pipe passage in which the stand pipe is received.Type: GrantFiled: July 20, 2001Date of Patent: April 22, 2003Assignee: Fleetguard, Inc.Inventors: Peter K. Herman, Jean-Luc Guichaoua, Richard Jensen
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Patent number: 6540653Abstract: A self-driven centrifuge for separating particulate matter out of a circulating liquid includes a base having a pair of tangential jet nozzles for generating the self-driven force. Connected to the base is a centrifuge shell which defines a hollow interior space. A disposable liner is positioned within the centrifuge shell. A hollow rotor hub is assembled to the base and extends through the hollow interior space. A support plate is positioned within the hollow interior space and, in cooperation with the rotor hub, defines an annular flow exit. Positioned within the hollow interior space is a unitary separation vane module which is constructed and arranged so as to extend around the rotor hub. The separation vane module includes a plurality of axially-extending and spaced-apart separation vanes. In one embodiment the vane module and a liner shell are formed as a unitary component.Type: GrantFiled: February 2, 2001Date of Patent: April 1, 2003Assignee: Fleetguard, Inc.Inventors: Peter K. Herman, Richard Jensen
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Publication number: 20020142470Abstract: Centrifugal analyzer and method for staining biological or non-biological samples in microgravity, wherein the method utilizes an increase in weight of a fluid sample as a function of g-load, to overcome cohesive and frictional forces from preventing its movement in a preselected direction. Apparatus is characterized by plural specimen reservoirs and channels in a slide, each channel being of differing cross-section, wherein respective samples are selectively dispensed, from the reservoirs in response to an imposed g-factor, precedent to sample staining. Within the method, one thus employs microscope slides which define channels, each being of a differing cross-section dimension relative to others. In combination therewith, centrifugal slide mounting apparatus controllably imposes g-vectors of differing magnitudes within a defined structure of the centrifuge such as a chip array.Type: ApplicationFiled: March 14, 2001Publication date: October 3, 2002Inventors: Mark S.F. Clarke, Daniel L. Feeback
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Publication number: 20010029227Abstract: A self-driven centrifuge for separating particulate matter out of a circulating liquid includes a base having a pair of tangential jet nozzles for generating the self-driven force. Connected to the base is a centrifuge shell which defines a hollow interior space. A disposable liner is positioned within the centrifuge shell. A hollow rotor hub is assembled to the base and extends through the hollow interior space. A support plate is positioned within the hollow interior space and, in cooperation with the rotor hub, defines an annular flow exit. Positioned within the hollow interior space is a unitary separation vane module which is constructed and arranged so as to extend around the rotor hub. The separation vane module includes a plurality of axially-extending and spaced-apart separation vanes. In one embodiment the vane module and a liner shell are formed as a unitary component.Type: ApplicationFiled: February 2, 2001Publication date: October 11, 2001Inventors: Peter K. Herman, Richard Jensen, Shirley Ann Jensen
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Patent number: 6296765Abstract: A centrifuge oil filter includes a centrifuge filter housing and a replaceable centrifuge cartridge. The centrifuge oil filter is adapted to remove soot from oil in engine applications. The centrifuge filter housing can be mounted directly on the frame of a vehicle for support and provides top access for a mechanic to service and replace the cartridge from the top of the filter. The centrifuge housing includes a lid at the top which can be removed to allow top access to the cartridge. The lid carries a bearing support and bearings upon which the upper end of a drive shaft is journalled to facilitate rotation of the cartridge. In the lower end of the housing another bearing assembly is provided with at least one set of bearings upon which the lower end of the drive shaft is journalled and an electrical motor which drives the drive shaft and therefore the cartridge.Type: GrantFiled: October 18, 1999Date of Patent: October 2, 2001Assignee: Baldwin Filters, Inc.Inventors: Gene W. Brown, Steven J. Merritt, Farrell F. Calcaterra
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Patent number: 6261455Abstract: A centrifuge oil filter includes a centrifuge filter housing and a replaceable centrifuge cartridge. The centrifuge oil filter is adapted to remove soot from oil in engine applications. The centrifuge filter housing can be mounted directly on the frame of a vehicle for support and provides top access for a mechanic to service and replace the cartridge from the top of the filter. The centrifuge housing includes a lid at the top which can be removed to allow top access to the cartridge. The lid carries a bearing support and bearings upon which the upper end of a drive shaft is journalled to facilitate rotation of the cartridge. In the lower end of the housing another bearing assembly is provided with at least one set of bearings upon which the lower end of the drive shaft is journalled and an electrical motor which drives the drive shaft and therefore the cartridge.Type: GrantFiled: October 18, 1999Date of Patent: July 17, 2001Assignee: Baldwin Filters, Inc.Inventors: Gene W. Brown, Steven J. Merritt, Farrell F. Calcaterra
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Patent number: 6149569Abstract: The present invention is a centrifuge essentially comprised of a rotor and a transparent cover which can be fixed to the rotor. The cover is provided with a plurality of spaced concentration lines each extending around the cover and a plurality of different graduated scales extending radially from the center of the cover across the concentration lines at spaced angular intervals. The rotor and the cover also have opposing snap lock elements at a central portion of the rotor and the cover.Type: GrantFiled: April 10, 1998Date of Patent: November 21, 2000Assignee: Firma Andreas HettichInventor: Guenter Eberle
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Patent number: 5902224Abstract: A gas separation centrifuge is provided with a housing having a top, a bottom and a plurality of joined side walls parallel to an axis and forming a predetermined regular polygon cross-sectional shape perpendicular to the axis. A rotor is mounted for coaxial rotation within the housing, including a plurality of inverted truncated pyramid plates forming the predetermined regular polygon shape at an outer periphery, and forming the predetermined regular polygon shape at an interior edge. The plurality of inverted truncated pyramid plates are stacked coaxially and are axially spaced apart to form planar channels therebetween and define an interior annular volume with openings therefrom into the planar channels. There are also openings through the outer periphery. A first plurality of stationary concentric input tubes extends into the interior annular volume.Type: GrantFiled: March 14, 1997Date of Patent: May 11, 1999Assignee: Fuge Systems, Inc.Inventor: Michael R. Bloom
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Patent number: 5637217Abstract: A bypass circuit centrifuge for separating particulate matter out of a circulating liquid includes a hollow and generally cylindrical centrifuge bowl which is arranged in combination with a base plate so as to define a liquid flow chamber. A hollow centertube axially extends up through the base plate into the hollow interior of the centrifuge bowl. The bypass circuit centrifuge is designed so as to be assembled within a cover assembly and a pair of oppositely disposed tangential flow nozzles in the base plate are used to spin the centrifuge within the cover so as to cause particles to separate out from the liquid. The interior of the centrifuge bowl includes a plurality of truncated cones which are arranged into a stacked array and are closely spaced so as to enhance the separation efficiency. The incoming liquid flow exits the centertube through a pair of oil inlets and from there is directed into the stacked array of cones.Type: GrantFiled: January 5, 1996Date of Patent: June 10, 1997Assignee: Fleetguard, Inc.Inventors: Peter K. Herman, Byron A. Pardue
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Patent number: 5575912Abstract: A bypass circuit centrifuge for separating particulate matter out of a circulating liquid includes a hollow and generally cylindrical centrifuge bowl which is arranged in combination with a base plate so as to define a liquid flow chamber. A hollow centertube axially extends up through the base plate into the hollow interior of the centrifuge bowl. The bypass circuit centrifuge is designed so as to be assembled within a cover assembly and a pair of oppositely disposed tangential flow nozzles in the base plate are used to spin the centrifuge within the cover so as to cause particles to separate out from the liquid. The interior of the centrifuge bowl includes a plurality of truncated cones which are arranged into a stacked array and are closely spaced so as to enhance the separation efficiency. The stacked array of truncated cones is sandwiched between a top plate positioned adjacent to the top portion of the centrifuge bowl and a bottom plate which is positioned closer to the base plate.Type: GrantFiled: January 25, 1995Date of Patent: November 19, 1996Assignee: Fleetguard, Inc.Inventors: Peter K. Herman, Byron A. Pardue
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Patent number: 5244502Abstract: 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: GrantFiled: November 26, 1991Date of Patent: September 14, 1993Assignee: Braunschweigische Maschinenbauanstalt AGInventors: Helmut Schaper, Heinrich Kurland
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Patent number: 5221460Abstract: Hydrocarbon dewaxing using propane or other autorefrigerative dewaxing solvent can be practiced in a centrifuge wherein the centrifugal force generated in the centrifuge produces a pressure gradient permitting dewaxing to be practiced on a continuous basis.Type: GrantFiled: May 22, 1991Date of Patent: June 22, 1993Assignee: Exxon Research & Engineering CompanyInventor: Abraham R. DeKraker
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Patent number: 5188583Abstract: The device for separating plasma from a sample of whole blood by centrifuging comprises:a distributor-divider disposed centrally and provided with n compartments communicating with a sample-receiving well and communicating with one another via notches;a ring separator including n receptacles communicating with the n compartments and with n outer cells and terminating in an open funnel; anda removable plasma collector fitted onto said funnel.Type: GrantFiled: August 2, 1991Date of Patent: February 23, 1993Inventor: Jean Guigan
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Patent number: 5052996Abstract: The invention relates to a centrifugal separator with a rotor having a separation chamber, a stack of frusto-conical separation discs arranged spaced from each other in the separation chamber coaxially with the rotor, and means defining centrally in the stack of separation discs radially inside thereof an inlet chamber. Inlet chamber is closed from connection with the separation chamber along the axial extension of the stack but communicates with the separation chamber at least at one end of the stack. The inlet means for introducing a liquid mixture into the inlet chamber and annular acceleration discs are placed coaxially with the rotor in the inlet chamber and arranged for gradual entrainment of incoming mixture in the rotation of the rotor.Type: GrantFiled: May 14, 1990Date of Patent: October 1, 1991Assignee: Alfa-Laval Separation ABInventor: Christer Lantz
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Patent number: 5024648Abstract: 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: GrantFiled: January 17, 1990Date of Patent: June 18, 1991Assignee: Alfa-Laval Separation ABInventors: Claes Inge, Peter Franzen, Torgny Lagerstedt, Leonard Borgstrom, Claes-Goran Carlsson, Hans Moberg, Olle N.ang.bo
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Patent number: 4990129Abstract: An adapter preferably of ultra high molecular weight polyethylene is provided for use with a conical centrifuge tube in an ultracentrifuge swinging bucket rotor hole and is designed to allow the easy removal of the adapter and tube after centrifugation. At the top of the adapter is an integral annular rim with an outside diameter equal to that of a cylindrical upper portion of the centrifuge tube and with a minimal clearance to the diameter of the rotor hole. Immediately below the annular rim and adapter diameter reduces to a lesser diameter and continues until intersection with a hemispherical bottom region. The internal configuration of the adapter has a tapered conical section ending in a reduced diameter hemisphere, the internal taper and hemisphere of the adapter exactly matching the exterior of supported conical portion and hemispherical termination end of the sample tube.Type: GrantFiled: August 16, 1988Date of Patent: February 5, 1991Inventor: Steven T. Nielsen
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Patent number: 4976678Abstract: 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: GrantFiled: May 31, 1989Date of Patent: December 11, 1990Assignee: Meiji Milk Products Co., Ltd.Inventors: Yutaka Suginaka, Shigeru Taniguchi
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Patent number: 4966576Abstract: 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: GrantFiled: September 29, 1989Date of Patent: October 30, 1990Assignee: Westfalia Separator AGInventors: Dieter Schulz, Ulrich Wrede, Wilfried Mackel
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Patent number: 4961724Abstract: A low speed decanting centrifuge for separating relatively large particulate material (e.g. yeast) from a feedstock is disclosed. The centrifuge is clamped to a container and the centrifuge housing is pressurized to, in turn, pressurize the container and force feedstock upwardly into the lower bowl of the centrifuge. A plurality of inverted frustoconical discs carry supernatant downwardly and inwardly for vertical transfer to a discharge chamber. Particulate matter is centrifugally discharged continuously between engageable surfaces of the lower bowl member and the upper bowl member. The invention provides for continuous recycle as the discharged particulate matter is returned under gravity to the container. The centrifuge is reasonably inexpensive to produce from lightweight materials since it is not subjected to the high stresses of high speed centrifuges. Also, by operating at low speeds, under 1000 r.p.m.Type: GrantFiled: September 28, 1989Date of Patent: October 9, 1990Assignee: Occam Marine Technologies Ltd.Inventor: Dan R. Pace
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Patent number: 4930412Abstract: In a centrifuge rotor for separation of two liquids having different densities from a mixture thereof a stack of conical separation discs (21) is arranged in the separation chamber (13) with the base portions of the separation discs turned towards one end and with the apex portions of the separation discs turned towards the other end of the separation chamber. According to the invention the separation chamber (13) has an inlet for mixture situated at the end, towards which the separation discs turn their apex portions, and an outlet for separated relatively heavy liquid situated at the opposite end. The inlet for liquid mixture as well as both outlets for the separated liquids are situated at the same axial end wall of the centrifuge rotor.Type: GrantFiled: September 28, 1988Date of Patent: June 5, 1990Assignee: Alfa-Laval Separation ABInventor: Klaus Stroucken
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Patent number: 4637872Abstract: A centrifugal separator has a rotating tub with annular dams to trap the heavier components of the slurry fed into the tub through a centrally located feed tube. The latter rotates at a speed slightly different from that of the tub and supports radially extending spokes that have depending tines provided with lower nozzle defining ends in the annular spaces between the dams. Water under pressure emanates from these nozzles. An alternative tub configuration has annular water manifolds inside these annular spaces to provide water under pressure to nozzles in the tub itself for supplementing the action of the nozzles in the depending tines.Type: GrantFiled: April 12, 1985Date of Patent: January 20, 1987Inventor: Carl E. Balkus