Patents Examined by Frank W. Lutter
  • Patent number: 4657667
    Abstract: A particle classifier has a uniform, laminar, classifying air stream and a duct to introduce particulate material generally perpendicular to the air stream. The particulate material is entrained in a secondary air stream that is diverted as it enters the classifying air stream by a curved surface. The curved surface produces and diverts the air stream by the Coanda effect to minimize disturbance to the classifying air and segregate the particles from the secondary air.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: April 14, 1987
    Assignee: The University of Toronto Innovations Foundation
    Inventor: Bernard Etkin
  • Patent number: 4604193
    Abstract: The invention relates to a method and apparatus for sorting out recycled paper pulp obtained from scrap material containing contaminants in the form of large pieces of foreign material such as plastics, adhesives, pieces of rope and the like.The invention avoids the need to disintegrate such large pieces of foreign material prior to their removal.The device of the invention comprises a drum (1) with an horizontal axis (2), an end wall (3) of the drum being fitted with a perforated plate (4) and an helical stirrer (5) having profiled blades rotating in a plane parallel to this plate at a short distance thereof, these blades having a transverse cross-section with a hydrodynamic profile adapted for generating a depression in front of the perforated plate, and a leading edge (6) forming a Bernouilli spiral with a constant angle of approximately 30.degree.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: August 5, 1986
    Assignee: E et M Lamort S.A.
    Inventor: Jean-Pierre J. Lamort
  • Patent number: 4597861
    Abstract: In wet gravity separation of solids according to specific gravity an outer depleted band partly overlies an inner concentrate band limiting yield and/or purity of separated concentrate. The overlying depletion layer is diverted outwardly from inner wall (15) relative to the concentrate band. Deflection means (20) cause a bow wave in descending slurry which fans out the concentrate aiding precise setting of downstream splitter blade (18) as well as diverting the overlying depletion band towards outer wall (13). The water which has become separated from the slurry due to centrifugal force can be rehomogenized with the remaining concentrate by restricted passage between deflector means (22,26).
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: July 1, 1986
    Assignee: Mineral Deposits Limited
    Inventor: Douglas C. Wright
  • Patent number: 4595492
    Abstract: Process for recovery of elemental phosphorus from phosphorus sludge produced in a phosphorus furnace by treating the sludge in a centrifugal separator and separating a fine dirt slimes fraction from a recovered heavy fraction containing the major portion of phosphorus; treating the slimes fraction in hydrocyclones not over one inch (24.4 mm) in diameter to separate two streams, a first phosphorus-poor stream containing particles smaller than 8-15 micrometers, and a second phosphorus-rich stream containing particles larger than 8-15 micrometers; recycling the second, phosphorus-rich stream to the centrifugal separator for phosphorus recovery, and discarding the first, phosphorus-poor stream.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: June 17, 1986
    Assignee: FMC Corporation
    Inventors: David A. Crea, James A. Robertson, Jerry A. Keely
  • Patent number: 4595494
    Abstract: The invention relates to apparatus for separating ferromagnetic particles from a slurry, in which the slurry passes through a tunnel-shaped channel which is surrounded by a magnet coil the iron yoke of which is constructed asymmetrically in such a way that the magnetic field strength in the channel increases from the top towards the bottom.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: June 17, 1986
    Assignee: Krupp Polysius AG
    Inventor: Karl-Heinz Kukuck
  • Patent number: 4594149
    Abstract: A magnetohydrostatic centrifuge of unique geometry in which an elongated separation space is provided within the bore of an elongate cylindrically shaped multipolar magnet. Separations are accomplished both with and without rotation by passing particles to be separated through the separation space within a paramagnetic or ferromagnetic fluid. Certain separations are preferably made using a quadrupolar magnet configuration with a paramagnetic fluid, others with a quadrupolar magnet and a ferromagnetic fluid, and still others, with a sextupolar magnet and a ferromagnetic fluid. Efficient use is made of the magnetic field through the use of a plurality of inner ducts creating a plurality of thin, elongate separation channels characterized by long particle dwell time and short drift distances during the separation process. Significant throughput capacity is achieved in a system in which the magnetic medium is pumped through the separator.
    Type: Grant
    Filed: May 21, 1982
    Date of Patent: June 10, 1986
    Assignee: Mag-Sep Corp.
    Inventors: Uri T. Andres, Alan L. Devernoe, Michael S. Walker
  • Patent number: 4592833
    Abstract: A portable sluice box for classification of mineral particulate from detritus or placer deposits containing the same is comprised of an infeed table including upstanding sidewalls and a bottom wall for receiving and confining a charge of mineral-containing deposits for fluid compelled movement along a path lying in a material handling plane generally coincident with the bottom wall of the table; a classification table member, including upstanding sidewalls and a foraminous separation plate having downwardly depending, opposed marginal skirts for proximal engagement with the sidewalls of the separation table interiorly thereof, the separation plate also lying within the material handling plane; a plurality of riffles disposed transversely in a laterally and longitudinally extending spaced array between the skirts, defining a series of upper flow channels intermediate the separation plate and the top edge of the riffles and a lower, mat channel intermediate the bottom wall of the classification table and the bo
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: June 3, 1986
    Inventor: Vernon Perdue
  • Patent number: 4591432
    Abstract: In sieving apparatus, an undercarriage carries a belt conveyor, which has a frame that is adapted to be folded in length about a hinge. The belt conveyor carries at its discharge end a sieving machine, which is adapted to be driven and which has an adjustable inclination relative to the belt conveyor. Hydraulic cylinder-piston units are provided for adjusting the inclination of the sieve and for pivotally adjusting the pivotally movable section of the conveyor belt frame. The sieving machine is adapted to be swung against that side of the adjacent section of the conveyor belt frame which faces downwardly when the apparatus is in operating position. As a result, when the apparatus is entirely collapsed the upper section of the conveyor belt frame extends above and along the lower section of said frame and the sieving machine is disposed above the upper section of said frame.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: May 27, 1986
    Inventor: Franz Hartl
  • Patent number: 4588499
    Abstract: In a gravity flow amalgamator an elongated upright housing is provided with a removable bottom end tray containing a bath of mercury for collecting gold. A pair of partition walls extend inward and downwardly in parallel relation transversely of the housing to form a water channel downstream tortuous path characterized by return bends with each wall of the pair of walls respectively attached to the inner surface of the housing opposing side walls intermediate their height to define fluid compartments at opposite sides of the housing. The water channel discharges the water into one of the fluid compartments.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: May 13, 1986
    Inventor: Earnest Z. Coker
  • Patent number: 4585551
    Abstract: A rotor for a sorting apparatus for cleaning fibrous suspensions such as produced from the making of paper is described. The rotor is equipped with sorter blades which extend substantially parallel to the axis of rotation and are set at a desired angle relative to the direction of rotation of the rotor so as to create a hydrofoil effect. The sorter blades are mounted to one or more supporting walls shaped in a spiral form to provide spiral surfaces which are coaxial with the axis of rotation of the rotor and impart a conveying motion to the fibrous suspension. Upon rotation of the rotor in a fibrous suspension entanglements by impurities are avoided and the danger of the occurrence of a blockage of the strainer used in the sorter apparatus is reduced.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: April 29, 1986
    Assignee: J. M. Voith GmbH
    Inventors: Walter Musselmann, Juan Valdiva
  • Patent number: 4585547
    Abstract: The present invention is directed to a method and apparatus for separating coal from impurities, which comprises a first and second tank including drag conveyor means and agitation means for the combination of saturating a raw mass containing coal and impurities, dispersing the impurities in to water, separating the coal from the impurities and flowing the mass from the front of the tanks to the rear of the tanks. A crusher as arranged between the tanks through conveyor means for transferring the mass between from one tank to the crusher and from the crusher to the other tank. The mass from the second tank is conveyed in to a separator pan which includes a separator plate, the separator plate having a configuration and being located within the separator pan at a position, so that an upper flow portion of the mass having a lower specific gravity passes thereover, and so that a lower flow portion of the mass having a higher specific gravity passes thereunder and out a hole in the bottom of the separator.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: April 29, 1986
    Inventor: G. W. Nicholson
  • Patent number: 4584094
    Abstract: A method and system for reclaiming coal by separating useable coal from refuse includes a pre-conditioning stage wherein a raw feed stock of coal and refuse is mixed with a liquid medium, and a separation stage wherein the pre-conditioned feed stock is processed to separate useable coal from the refuse. In the pre-conditioning stage, the raw feed stock is used to prepare a slurried medium containing particulate material of a predetermined particulate size and of a pre-selected specific gravity. In the washing stage, the slurried medium is separated into two separated slurries, one being of lesser specific gravity than the slurried medium and the other being of greater specific gravity than the slurried medium. Usable coal is separated from the slurry of lesser specific gravity and refuse is separated from the slurry of greater specific gravity. The effluent from the slurries of lesser and greater specific gravities is collected for use in preparing the slurried medium in the pre-conditioning stage.
    Type: Grant
    Filed: June 6, 1984
    Date of Patent: April 22, 1986
    Inventor: William H. Gadsby
  • Patent number: 4582597
    Abstract: A vibratory screen structure which is rectangular in plan employing pretensioned screen panels and a pneumatic tube seal beneath the panels. Restraining members are positioned on two sides of the screen panels to hold the screen frames in position on the pneumatic tubes when sealed. The remaining sides are unrestrained and bow under the pressure of the pneumatic tubes to create a crown in each screen panel.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: April 15, 1986
    Assignee: Sweco, Incorporated
    Inventor: Gene A. Huber
  • Patent number: 4581045
    Abstract: A gas-distributing device for use in a gas passage which flares like a diffuser, particularly a passage leading to an electrostatic precipitator, formed by a set of components consisting of perforated sheet metal panels, carrying and connecting elements, in which the carrying elements have no wide end faces extending at right angles to the direction of flow so that the variations of the gas velocity over the entire flow area can be distinctly reduced. Besides, the set of components can be manufactured at lower total costs and the perforated sheet metal panels, which are connected by the connecting element to the carrying elements consisting of flat bar strips, is simplified.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: April 8, 1986
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventor: Egon Jury
  • Patent number: 4581132
    Abstract: A sifter apparatus comprises an oscillatory support comprising two side plates defining transversely aligned window openings at spaced locations along the side plates and first transverse bearing beams extending between the aligned window openings and connecting the side plates. Inertia is imparted to the oscillatory support by two side bearing beams extending along the two side plates and second transverse beams passing through the aligned window openings in the side plates and connecting the side bearing beams. Pairs of spring elements are connected to the side plates of the support at the spaced location, the two side bearing beams being gripped between the spring elements of each pair. Sifting mats are secured between respective ones of the first and second transverse beams.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: April 8, 1986
    Inventors: Hermann Fritz, Erich Neuhold, Richard Reder
  • Patent number: 4576713
    Abstract: A multiple deck screening machine wherein the feed material is divided into separate equal fractions on a rubble screen deck and scalp screen decks. Each deck includes downwardly slanting distribution panels having serrated lower edges. Particulate flow over the serrated edges is divided into separate fractions. Each adjacent fraction passes into a different parallel vertical channel which serves a particular screen deck via a chute. The chutes and channels extend the full width of the screens. Flow across the serrated edges is separated due to the notches and tongues and upstanding dividers along the common edge to each notch and tongues. Each notch and tooth of the rubble screen deck is disposed in juxtaposition to an opposed tongues and notch respectively so that excess flow over a tongues may pass over its channel into the channel of the opposed notch. The rubble screen deck including a pair of downwardly and inwardly inclined distribution panels which oppose each other and define a flow gap therebetween.
    Type: Grant
    Filed: July 19, 1984
    Date of Patent: March 18, 1986
    Assignee: Carter-Day Company
    Inventor: Gerald W. Melin
  • Patent number: 4575418
    Abstract: There is disclosed the process for the separation of the clay particles (ash) from coal particles by the use of two immiscible liquids followed by the separation and removal of the liquids from the solids.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: March 11, 1986
    Assignee: The Dow Chemical Company
    Inventor: Lanny A. Robbins
  • Patent number: 4575420
    Abstract: A power sieve has a generally planar and longitudinally extending frame having upstream and downstream ends and a pair of laterally spaced side members extending longitudinally between the ends, a generally planar screen spanned longitudinally within the frame, and a plurality of longitudinally spaced and substantially parallel beater beams underneath the screen and having beam ends juxtaposed with the frame side members. Respective horizontally extending leaf springs each have one end secured to the respective side member and another end secured to the respective beam end. Thus the beams can move generally vertically on the springs. Respective beater arms extending generally parallel to the screen from the beater beams have outer ends engageable with the underside of the screen.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: March 11, 1986
    Assignee: "RHEWUM" Rheinische Werkzeug- und Maschinenfabrik GmbH
    Inventors: Wolfram Blachetta, Horst Peterling
  • Patent number: 4574046
    Abstract: A centrifugal jig to beneficiate ore by separating a heavier particulate fraction from a lighter particulate pulp. The jig provides a rotor with a vertical cylindrical jig screen rotating in a fluid filled hutch to support a vertical jigging bed. The jigging bed is pulsed sequentially as it is rotated past plural spaced pulsing elements positioned in the hutch externally of the jigging screen. Pulsing may be by pressurized air in the form of fine bubbles, by pressurized fluid or a combination of both. Pulp material is fed at the bottom of the jigging screen to move upwardly thereacross with the lighter gangue material exiting above the screen for exhaustion and the heavier mineral bearing fraction exiting through the screen for subsequent recovery from the bottom periphery of the hutch area. The jig may be used as a bedded centrifuge or in the fashion of a traditional jig especially as when provided with ragging.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: March 4, 1986
    Inventor: Earnest A. Sprow
  • Patent number: 4574045
    Abstract: Substance particulate in the general size range of minus 30 Mesh U.S. Standard to about 1 micron is separated into portions based on the densities of those components making up the total by drying to about 1% moisture and air conveying the substance through a duct in which the material assumes a stratified arrangement dictated by particle density. Means are provided by air duct configuration and partial flow diversion to remove appropriate laminar segments of the air-solids mixture.Light, medium and heavy ash and pyritic Sulfur in substantial percentages can be removed from bituminous coal fines embodying this principle in a negative air atmosphere. After beneficiation of bituminous coal fines any undesired pyritic or organic Sulfur can be contained by intimately mixing calcium hydroxide with the coal in the amount of 2.24 parts of calcium hydroxide to one (1) part of Sulfur by weight.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: March 4, 1986
    Inventor: Edward Y. Crossmore, Jr.