Impetus And Countercurrent Patents (Class 209/145)
  • Patent number: 9409210
    Abstract: The invention relates to a separation-apparatus for separating from a particle-stream at least a first fraction with particles of a first group of dimensions, and a second fraction with particles of a second group of dimensions, comprising an infeed-device for the particle-stream, a rotatable drum having at its circumference plates, each plate having a radially extending hitting surface for the particles, at least a first receiving area proximal to the drum for receipt therein of particles of the first fraction, and at least a second receiving area distant from the drum for receipt therein of particles of the second fraction, wherein the apparatus has a housing so as to protect the particles from outside weather-conditions, allowing that the particles of the particle-stream to be processed by said apparatus have dimensions in the range 0-15 mm.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: August 9, 2016
    Assignee: ADR TECHNOLOGY B.V.
    Inventors: Simon Peter Maria Berkhout, Peter Carlo Rem
  • Patent number: 8172087
    Abstract: Disclosed is a separation apparatus comprising a conveyor; and a material separator positioned above a conveyor, the conveyor being arranged to convey a mixture of materials to the material separator; the material separator comprising a suction duct comprising a sidewall which defines a passageway linking an inlet positioned adjacent the conveyor to an outlet positioned away from the conveyor; and an airflow generator arranged to blow air through a slit in the sidewall into the passageway at a position between the inlet and the outlet; wherein, in use, the airflow generator blows air through the slit in a direction which is towards the outlet for creating a pressure difference between the inlet and the outlet thereby generating an airflow which causes relatively low density materials to be lifted from the conveyor and sucked into the passageway.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: May 8, 2012
    Assignee: Tek-Dry Systems Limited
    Inventor: Thomas Fryars
  • Patent number: 7900777
    Abstract: A compact housing for a dedusting apparatus utilizes a magnetic flux field to disrupt the static charge attracting dust particles to product particles, which along with fluidization and counter current airflow principles that are proven to dislodge dust particles from the product, provides a highly efficient, compact deduster. The housing supports a double wash deck with product flow separated between the back-to-back primary wash decks. A deflector directing the flow of product onto the primary wash decks is provided with an extension that extends parallel to the wash deck to eliminated product bouncing off of the wash deck. The lower air outlets are eliminated, while the upper air outlets are positioned in extensions to the main housing above the product inlet opening. Air flow through the Venturi zones is enhanced by directing clean air through slots formed in the lower deck members into the Venturi zones.
    Type: Grant
    Filed: May 24, 2008
    Date of Patent: March 8, 2011
    Assignee: Pelletron Corporation
    Inventors: Heinz Schneider, Paul Wagner
  • Publication number: 20100184861
    Abstract: The invention provides, inter alia, a method for producing granules from a powder, characterized in that compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating and removing fine particles and/or small granules from the other granules by entraining the fine particles and/or small granules in a gas stream. Also provided are apparatus for use in the process and tablets formed by compression of the resultant granules.
    Type: Application
    Filed: October 16, 2009
    Publication date: July 22, 2010
    Inventors: Giovanni Politi, Erkki Heilakka
  • Patent number: 6902067
    Abstract: An in-shell nut sorting and debris removal assembly for removing debris including empty shells and sorting out unacceptable in-shell nuts includes multiple spaced belt sorting assemblies to removed materials having desired size characteristics and send them into a collision chamber where the materials are subjected to air current to promote collisions between the materials. An inclined or angled separator screen mesh permits the upward air flow and sorts the materials by density as the collisions occur within the collision chamber. Upper and lower openings are used to remove the density sorted materials from the collision chamber. The lower opening is further divided to sort excessively dense materials such as rock from materials having the desired density characteristics.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: June 7, 2005
    Inventor: Henry H. Barnes, Jr.
  • Patent number: 6595369
    Abstract: A compact dedusting apparatus is mounted on the machine utilizing particulate material requiring contaminant cleansing to provide an economical and effective decontamination of particulate material immediately before utilization of the material. The dedusting apparatus includes a downwardly sloped infeed chute having an opening at the bottom thereof. A metering device in the form of a rotatable finned hub blocks the opening to constantly meter the flow of particulate material through the dedusting apparatus. The metering device is formed with flexible blades oriented at a slight angle to the slope of the infeed chute to provide a constant flow of material through the opening. A flow of air is directed through a wash deck positioned below the infeed chute to cleanse the particulate material. The air flow is directed along multiple paths including a path defining an air knife associated with the wash deck to facilitate the cleansing of the material.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: July 22, 2003
    Inventor: Jerome I. Paulson
  • Patent number: 6206202
    Abstract: A cyclone separator (1) has an elongated vertical housing (2), whose upper section (3) is equipped with a carrier gas/product inlet (4), a separating wheel (6), and a carrier gas/fine product discharge (7). A lower section (9) of the housing defines an oversized product discharge (11). The housing (2) has a central axially extending built-in unit (12), which separates the cyclone carrier gas/particle flow stream, downwardly in a peripheral region, and upwardly in a central region. A lower built-in unit section (14) is joined to a cylindrical middle built-in unit section (15). An entry area of the middle section (15) is equipped with a constrictor (19) which with the built-in body forms a Venturi. Finally, a secondary air supply (24) enters into a lower inlet opening (9) of the lower built-in unit section (14) facing the constrictor (19). An injector effect is achieved which increases the suction, resulting in further improvement of the separating and sorting properties.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: March 27, 2001
    Assignee: Hosokawa Mikropul Gesellschaft fur Mahl-und Staubtechnik mbH
    Inventors: Joachim Galk, Peter Hoffmann, Wolfgang Peukert
  • Patent number: 6032803
    Abstract: A bulk material separator having an at least substantially coaxial arrangement, includes an essentially rotationally symmetric, vertically oriented separator jacket (1) having in the upper section (11) an exit port (12) for air and light bulk material fractions and a narrowing section (15) followed by an expanding guide funnel (14), a downwardly oriented bulk material feed tube (2) extending into the top of the separator jacket (1) and ending in the region of the narrowing section (13), a displacement body (5) arranged coaxial with the bulk material feed tube (2) and arranged at least in the region of the guide funnel (14) and having an upwardly pointing conical tip (51), a container (6) having a separator air inlet port (61) and surrounding the guide funnel (14) and the displacement body (5). The bulk material feed tube (2) has a conically expanding mouth region (23), and the conical tip (51) of the displacement body (5) is immersed at least partially in this mouth region (23).
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: March 7, 2000
    Assignee: Waescle GmbH
    Inventors: Konrad Nicole, Ernst Reinhard, Norbert Wohnhas
  • Patent number: 5788083
    Abstract: The invention proposes an elbow/countercurrent classifier by means of which a pneumatically introduced bulk-material stream can be separated into coarse fractions and fine materials. In order to increase the efficiency of the classifier as regards the separating action, a wall profile which results in increased turbulence of the gas streams is selected, in particular, in the region of the acceleration section and of the classifying section which adjoins the latter at the bottom. This produces a rise in the air velocity in the vicinity of the wall and thus an air velocity which is constant over the cross section.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: August 4, 1998
    Assignee: Zeppelin Schuettguttechnik Gmbh
    Inventor: Wolfgang Krambrock
  • Patent number: 5294002
    Abstract: Apparatus (10) for separating intermixed particulate materials. The apparatus (10) includes a housing (12) having a coaxial core (14) disposed therewithin to define an annular space (24) between the core (14) and the wall of the housing (12). A recirculator (46) is provided to provide gas to the housing (12) for cyclonic flow within the annular space (24). The intermixed particulate materials are introduced into the housing (12) and permitted to fall, under the influence of gravity, into the annular space (24) where separation is effected by interaction of the upwardly spiralling gas with the downwardly-passing, intermixed particulate materials.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: March 15, 1994
    Assignee: Crown Iron Works Company
    Inventor: Darcy Moses
  • Patent number: 5238118
    Abstract: A separator includes two concentric pipe sections, with the inner pipe section enclosing a displacement body with cone-shaped tip. In order to improve separation of angel hair, the displacement body has evenly spaced circumferential ribs to provide the displacement body with a cross section of star-shaped configuration.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: August 24, 1993
    Assignee: Waeschle Maschinenfabrik GmbH
    Inventor: Robert Storf
  • Patent number: 5201422
    Abstract: A classifier for powdery material has a cylindrical casing formed at an upper portion thereof with an inlet port for introducing the material to be classified into the casing in a tangential direction of an inner wall thereof. The casing has a conical portion formed in its bottom end with an opening connected to a discharge pipe for discharging coarse particles. Further, an outlet pipe protrudes into the casing through its top. The inlet port is located higher than the bottom end of the outlet port. An externally-driven vane wheel is provided under the outlet pipe in a concentric relationship with respect to the casing.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: April 13, 1993
    Assignee: Kubota Corporation
    Inventors: Yoshitaka Ihara, Akira Ganse, Hidemasa Ishikawa, Takashi Katsurazako
  • Patent number: 5165549
    Abstract: A separator for classifying powder with air current comprises at least a classifying chamber and an introducing section for introducing powder into the classifying chamber, a powder feeding inlet for feeding powder formed at the upper portion of the classifying chamber, a cone-shaped classifying plate with a high central portion formed at the lower portion of the classifying chamber, a coarse powder discharging outlet for discharging coarse powder provided at the lower brim outer periphery of the classifying plate, a fine powder discharging outlet for discharging fine powder provided at the central portion of the classifying plate, a gas inflower for dispersing powder by whirling gas provided at the upper outer periphery of the classifying chamber, and a gas inflow inlet for creating a whirling current of gas for classifying powder provided at the lower portion of the classifying chamber.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: November 24, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Kanda, Toshiaki Sasaki, Masayoshi Kato, Satoshi Mitsumura
  • Patent number: 5120431
    Abstract: A pneumatic centrifugal separator comprises guide vanes disposed along the generatrices of a fictitious cylinder having a vertical axis, the guide vanes being adapted to impart to a gas stream entering the fictitious cylinder a rotary motion about the vertical cylinder axis, and a rotor coaxially positioned in the interior of the fictitious cylinder, the rotor being equipped with a first set of vertical blades distributed uniformly along the periphery of the fictitious cylinder and a second set of blades disposed between the blades of the first set and the cylinder axis. A gas stream and particulate material to be sorted is introduced between the guide vanes and the rotor, and the gas stream charged with particles of dimensions smaller than predetermined dimensions and sorted out of the particulate material is drawn out of a central outlet. The second set of blades is arranged to guide the streams of gas coming through channels between adjacent vertical blades of the first set to the central outlet.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: June 9, 1992
    Assignee: FCB
    Inventor: Alain Cordonnier
  • Patent number: 5032222
    Abstract: A spray drier (1) for the preparation of powders, agglomerates or the like, by the drying of pumpable products, has at an inlet (6) of its exhaust discharge line or lines (7) for the drying gas used in its drying chamber (3), a wind sifter (9) with a rotating bucket wheel (10). The flow generated by the rotating bucket wheel (10) of the wind sifter (9) acts against the exhaust suction flow. The discharge of fine materials is directed into the exhaust line (7) and the coarse material discharge (8) takes place in the drying chamber (3). Consequently, excellent desired separation of the coarse material component from the fine material component can be obtained within the drying chamber.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: July 16, 1991
    Assignee: Ciba-Geigy Corporation
    Inventor: Alain Millioud
  • Patent number: 4935123
    Abstract: The invention relates to an apparatus for the classification of solid materials, preferably that of hard and highly pure materials, comprising a housing provided with an inlet stub, fine fraction outlet stub and a coarse fraction outlet stub as well as vane-crowns. The fluid carrying the material to be separated or classified radially passes through two vane-crowns with the vanes oriented at an angle to the tangent of the vane-crowns. Upon passage through the first vane-crown the separating or classifying chamber is reached whereupon the coarse fraction is separated out and the fluid flows radially through the second vane-crown whereupon the flow becomes axial with the fluid exiting against gravity and the separated material being collected below in a closed storage tank associated with the coarse product outlet stub.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: June 19, 1990
    Assignee: Magyar Aluminiumipari Troszt
    Inventors: Zsolt Csillag, Geza Szentgyorgyi, Karoly Solymar, Tibor Kalman, Pai Toth, Ferenc Rosenmann, Janos Steiner, Janos Morzal, Laszlo Zsemberi, Bela Lajtai, Tibor Legat, Ferenc Sitkei, Ferenc Vallo, Balint Szabo, Gabor Molnar, Sandor Czafit
  • Patent number: 4882042
    Abstract: An apparatus and method for separating floss from particles conveyed in a primary gas. The primary gas strikes a plate in a closed hopper so that the primary gas, particles and floss are deflected downwardly through an annular passageway to an annular separation section. A secondary gas is jetted radially outwardly in the separation section to deflect the floss to a floss discharge tube. The heavier particles continue falling into a closed particle discharge passageway into which a tertiary gas is jetted so that it flows upwardly to the separation section. The particles but no gas are discharged from the lower end of the particle discharge passageway.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: November 21, 1989
    Assignees: Sumitomo Chemical Company, Ltd., The Nippon Aluminum Manufacturing Company, Ltd.
    Inventors: Koichi Manable, Mitsumura Naka, Mitsushi Futamura
  • Patent number: 4872972
    Abstract: An apparatus for classifying particles entrained by a solid-gas jet stream includes a feed nozzle, a cyclonic wall having an inner arcuate wall, and an auxiliary inner arcuate wall provided at an outlet port of the nozzle. The solid-gas stream is preliminarily bent along the auxiliary inner wall so that the particles are preliminarily or roughly classified into undersized and oversized particles by the action of the centrifugal force before they are classified by the cyclonic wall. The apparatus may include a collecting port disposed downstream of the nozzle outlet port and spaced slightly away from the inner arcuate wall of the cyclonic wall. The collecting port permits the apparatus to collect the undersized particles in a more effective manner.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: October 10, 1989
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Minoru Wakabayashi, Hiroyuki Murata, Yasuo Sugino, Masanobu Yamao, Takao Nishikawa
  • Patent number: 4756428
    Abstract: A method and mechanism for the separation of materials from a stream of pulverulent material such as cement including a rotatable plate onto which the material is fed with the material being centrifugally discharged in a bell shaped flow pattern, a radially inwardly directed flow of air across the veil carrying fine materials inwardly through a rotatable distributor; and coaxial dip tubes centrally located for receiving the gradations of fine material passing gravitationally downwardly, with the coarse materials remaining outside of the distributor and being received in a downward flow.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: July 12, 1988
    Assignee: Klockner-Humboldt-Deutz Aktiengesellschaft
    Inventor: Heinz Jaeger
  • Patent number: 4742919
    Abstract: Fines are separated from pin chips and a system in which a mixture of fines and pin chips is introduced onto a rotating disk which imparts centrifugal forces thereto for separation. In a first embodiment, the fines and the pin chips are propelled over different length paths to fall into separate collectors, the fines collector entraining the fines into an air stream for disposal. In this embodiment, the rotor comprises a rotary disk having a smooth upper surface, while in a second embodiment the upper surface is provided with a plurality of vanes on the upper surface thereof. In a third embodiment, the rotary disk is provided with a plurality of grooves for directing the fines over the periphery of the disk into its collector. In a fourth embodiment, the rotary disk is provided with a plurality of generally radial slots with vanes beneath in order to provide a classification between fines and pin chips.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: May 10, 1988
    Assignee: Beloit Corporation
    Inventor: Arne Eriksson
  • Patent number: 4670135
    Abstract: A high volume virtual impactor for sampling atmospheric aerosols has a plurality of inlet nozzles and associated receiving tubes mounted in a common frame or housing having passageways which divide the airflow through the inlet nozzles into a major flow and a minor flow. The minor flow, or the smaller volume flow, passes through the respective receiving tube into a common chamber, while the major flow is caused to turn 180.degree. between flow exit of the inlet nozzle and its associated receiving tubes and pass as through a small particle filter. The impactors are arranged in oppositely facing and aligned pairs. The exhaust ends of the receiving tubes in a part face each other, so that the flows from the receiving tubes will intermix in the center of a chamber, to prevent substantial particle impingement against the housing surfaces. The filters are located at the bottom of the housing to minimize losses.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: June 2, 1987
    Assignee: Regents of the University of Minnesota
    Inventors: Virgil A. Marple, Benjamin Y. H. Liu
  • Patent number: 4604192
    Abstract: In a powder classifier of the kind having a turbine-like horizontally rotating classifying rotor which is arranged to have air diametrically flow into radial passages and to cause the coarse powder portion of a powder material supplied to the inside of the radial passages to move to a circular passage encompassing the outer circumference of the rotor and the fine powder portion of the powder material to move diametrically toward the inside of the rotor, the circular passage has a discharge port formed in a part of the outer circumferential wall thereof. To the discharge port is connected a coarse powder discharge duct which approximately tangentially extends from the discharge port of the circular passage to a chute part arranged above a coarse powder recovering device; a powder return duct is connected to the chute part and extends approximately tangentially relative to the circular passage from the chute part to an opening provided in the outer circumferential wall of the circular passage.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: August 5, 1986
    Assignees: Nisshin Flour Milling Co., Ltd., Nisshin Engineering Co., Ltd.
    Inventors: Yukiyoshi Yamada, Shin Doi, Masayuki Yasuguchi
  • Patent number: 4560471
    Abstract: A powder classifier having two stages of classification blades which are arranged to intersect the radial directions of the powder classifier.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: December 24, 1985
    Assignees: Nisshin Flour Milling Co. Ltd., Nisshin Engineering Co., Ltd.
    Inventors: Yukiyoshi Yamada, Masayuki Yasuguchi
  • Patent number: 4526678
    Abstract: The present invention is directed to apparatus and a process for separating large from small particles suspended in a moving stream of gas by centrifugal forces which in a preferred embodiment includes sifting of large particles in a stream of gas to strip small particles away from the larger particles. The apparatus and process is especially adapted for separating dry finely divided particulate materials having small particles from about 0.05 micron to about 45 microns from larger particles suspended in the moving gas stream.
    Type: Grant
    Filed: June 22, 1983
    Date of Patent: July 2, 1985
    Assignee: Elkem Chemicals, Inc.
    Inventors: Jan Myhren, Svein E. Gitlestad
  • Patent number: 4523990
    Abstract: Apparatus for classifying carrier gas borne particulates including a chamber having a classifying rotor suspended therewithin fed by a jet pump induced transport path of carrier gas in the periphery of said chamber.
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: June 18, 1985
    Assignee: Mikropul Corporation
    Inventor: Robert W. Duyckinck
  • Patent number: 4486300
    Abstract: In a grader device grain is fed down a slide which ejects the grain outwardly and forwardly into an airstream. The slide is provided by a resilient flexible sheet, the contour and inclination of which is adjusted by a plurality of support rods against which the sheet presses and the positions of which are adjustable. A plurality of transverse collecting troughs with adjustable baffles, receive the separated grains according to the weight thereof with the top quality grain being heaviest, collecting in the forward trough. A suction fan extracts dust before it reaches the main airstream and diverts it into a cyclone or the like. Accurate airstream control is achieved by a plurality of adjustable wind boards strategically situated within the grader device.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: December 4, 1984
    Inventor: William Prieb
  • Patent number: 4365389
    Abstract: In apparatus for cleaning and removing dust from textile fiber tufts, which apparatus includes a channel for the passage of fiber tufts and including a member for introducing air into the channel, components defining an air separation zone having apertures and associated with the channel for separating air from the tufts in the channel, and a device for extracting air from the air separation zone, the components defining the air separation zone include at least one comb disposed a short distance downstream of the air introducing member at a location to enable tufts being carried through the channel to abut on the comb. An abutment member can additionally be disposed in the channel in the vicinity of the upstream end of the comb to aid in releasing dirt from the tufts.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: December 28, 1982
    Assignee: Trutzschler GmbH & Co. KG
    Inventors: Wolfgang Beneke, Ferdinand Leifeld
  • Patent number: 4242197
    Abstract: Raw and uncomminuted refuse is introduced through an entrance port into a substantially closed chamber as a horizontally flowing stream so that the refuse drops in the chamber along a path. A current of air is circulated in a closed circuit through the chamber and is directed in the chamber generally perpendicular to the path of the falling refuse and is inspired in the chamber through a sieve oriented substantially perpendicular to the current in the chamber. A minor portion of the air is withdrawn from the circuit, filtered, and released to the atmosphere. This withdrawn portion is replaced in the circuit by drawing air into the chamber substantially only through the entrance port so that slight subatmosphere pressure is created in the chamber to prevent the generation of unwanted dust or smell.
    Type: Grant
    Filed: February 24, 1976
    Date of Patent: December 30, 1980
    Assignee: Fritz-Aurel Goergen
    Inventors: Peter Voelskow, Horst Rothert, Gustav Schlotterer
  • Patent number: 4236997
    Abstract: The invention relates to an air separator having a rotor provided with feed passages for the material to be separated which extend radially outward and between which extraction openings are arranged. The space between adjacent feed passages which exists between the outer end of the feed passages and the extraction openings is axially delimited on at least one side by a stationary element forming part of an extraction housing. In this way, problems of wear in the outer region of the rotor are reduced. In addition, there is no longer any need for an exact sealing gap to be maintained between the rotor and the extraction housing. Finally, the free flow cross-section for the separation air is increased for the same overall dimensions of the separator.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: December 2, 1980
    Assignees: Josef Wessel, Polysius AG
    Inventors: Josef A Wessel, Manfred Muller, Otto Heinemann, Norbert Bredenholler
  • Patent number: 4235707
    Abstract: Solid Municipal Waste is loaded, or loaded and compacted, into a pressure vessel which has means for very fast opening for discharging the contents. The pressure vessel is pressurized, with steam, or a compressed gas such as compressed air. The pressure vessel can be fitted with a breech and a quick release muzzle cover and at the discharge end (muzzle) thereof is fitted with an orifice whose purpose is to promote a powerful turbulence and shock wave, through which the exiting solid material must pass to maintain pressure within the vessel during discharge, and to control the rate of discharge. The disruptive forces produced at the orifice, which can be either a sub-sonic, sonic, or supersonic flow orifice, are a function of the strength of the shock wave or the turbulence. The discharged material is then gravity separated in the wet or dry conditions and the separated materials are then employed in additional processes, or employed as landfill depending on its chemical and physical properties.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: November 25, 1980
    Assignee: Burke, Davoud & Associates
    Inventor: Jerry A. Burke, Jr.
  • Patent number: 4132634
    Abstract: In a method and apparatus for sifting particulate material in a cross current, the method and apparatus being of the type wherein all particles of the same size are propelled transversely at the same velocity of at least approximately 5 m/sec and with the same direction in a thin layer into a high velocity sifting gas current so as to preclude a determinative influence of gravity, the particles spread out into the current and after a time of flight of the order of magnitude of 1/100 second separated into two or more fractions by one or more knife edges disposed in a direction opposite to the material trajectories without previously rebounding from any wall, and the incoming sifting gas flow subdivided into at least two parts which are led off separately, improved separation characteristics are obtained by establishing an additional partial flow which is led off in a direction different from the influx direction of the sifting gas current, the partial flow having a momentum component in a direction opposite to
    Type: Grant
    Filed: June 28, 1977
    Date of Patent: January 2, 1979
    Assignee: Hans Rumpf
    Inventors: Hans Rumpf, Kurt Leschonski
  • Patent number: 4071441
    Abstract: A separator for the particles of a particle-air stream is provided which is capable of varying the composition of the particles obtained from the stream by providing typical swirling-air type separators with a by-pass whereby a portion of the original particle-air stream can be passed by the separation zone without being acted on by the swirling air.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: January 31, 1978
    Assignee: Gebr. Pfeiffer AG
    Inventor: Siegfried Schauer