Concave And Convex Sifters Patents (Class 209/274)
  • Patent number: 10612436
    Abstract: Aspects of the disclosure are directed to a deoiler. The deoiler includes an impeller, a housing arranged as a volute scroll, a splitter wall located at an exit of the deoiler that separates a lubricant and air discharged by the deoiler, and a port located at the exit that discharges the lubricant to at least one of a pump, a tank, or a gearbox.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: April 7, 2020
    Assignee: United Technologies Corporation
    Inventor: William G. Sheridan
  • Patent number: 10342179
    Abstract: A combine harvester is provided with a conveyance system for transporting crop material discharged by overhead grain separating apparatus to a grain cleaning shoe. The conveyance system includes a series of oscillating pans which move the grain in a generally longitudinal direction. A return pan conveys the collected material forwardly to a front discharge edge from where the material falls onto a stratification pan below. The stratification pan conveys the collected material rearwardly to a rear discharge edge from where the material falls into the grain cleaning shoe. At least one of the return pan and the stratification pan is non-rectangular and has a non-transverse discharge edge.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: July 9, 2019
    Assignee: AGCO International GmbH
    Inventors: Kenneth During, Morten Leth Bilde, David Marden
  • Patent number: 10321634
    Abstract: A grain cleaning system in a combine harvester including a pair of side walls, a rear wall that extends between the side walls, a sieve that oscillates in a fore-and-aft path between the side walls, a fan unit for generating a cleaning airstream, and an outlet for discharging residue from a grain-cleaning process. The outlet is framed in part by a lower edge of the rear wall. An aperture is provided in the rear wall to provide air relief to enhance the fore-to-aft flow of the cleaning airstream. Optionally, an auxiliary fan may drive air through the aperture.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: June 18, 2019
    Assignee: AGCO International GmbH
    Inventor: Morten Leth Bilde
  • Patent number: 8961786
    Abstract: A food container, comprising: a curved bottom; an opening in the bottom; a track connected to the bottom and adjacent the opening; a door slideable within the track, configured to encompass and occlude the opening in the bottom. When the door is opened, contents contained in the food container are pulled through the opening under the influence of gravity, and out of the food container without the need to rotate the container.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: February 24, 2015
    Inventor: Lesia Marie Farmer
  • Patent number: 8910796
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: December 16, 2014
    Assignee: Derrick Corporation
    Inventors: Keith Wojciechowski, Christian Newman
  • Patent number: 8800778
    Abstract: A suspension solution filter sieve basket for use in a flue gas desulfurization includes holes which widen in a flow direction of a suspension solution.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: August 12, 2014
    Assignee: REA Plastik Tech GmbH
    Inventors: Georg Neubauer, Jakob Wilhelm, Detlef Weber
  • Patent number: 8631945
    Abstract: A method for screening mixed particulate into multiple sized particulate simultaneously in a low dust high safety environment.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: January 21, 2014
    Inventor: James N. Cato
  • Publication number: 20130313168
    Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
    Type: Application
    Filed: March 13, 2013
    Publication date: November 28, 2013
    Applicant: Derrick Corporation
    Inventor: Keith F. Wojciechowski
  • Patent number: 8562832
    Abstract: A three-stage separator system for separating the solids and liquids from a slurry includes a first stage having an inclined housing defining a liquid channel. A slot sieve is disposed over an open surface of the channel. A mechanical vibrator assembly imparts mechanical vibration to a vibration zone of the slot sieve. A slurry delivery apparatus delivers the slurry to the slot sieve. A second stage includes an inclined conveyer positioned to convey partially-separated solids and includes a drive mechanism driven at a speed to cause the partially-separated solids to tumble as they are transported up the conveyor. A third stage includes a press positioned to accept partially-separated solids passing out of the tunnel press restrictor.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: October 22, 2013
    Inventor: Rejean Houle
  • Patent number: 8443984
    Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: May 21, 2013
    Assignee: Derrick Corporation
    Inventors: Keith Wojciechowski, Christian Newman
  • Patent number: 8123045
    Abstract: An apparatus is disclosed for separating popped corn from un-popped kernels. The apparatus includes a popped corn container that holds popped corn and a kernel separator located on a side of the popped corn container. The kernel separator includes a kernel separator screen with a plurality of holes, where a hole in the plurality of holes is larger than an un-popped kernel and smaller than a fully popped corn. The kernel separator also includes a reentry impedance means for impeding an un-popped kernel from entering the popped corn container through the kernel separator. The apparatus also includes a kernel container positioned outside the popped corn container and adjacent to the kernel separator such that the kernel container stores the un-popped kernel after the un-popped kernel has passed through the kernel separator. The apparatus may further include a cover container.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: February 28, 2012
    Inventors: Jeffrey M. White, Charles C. Hiigel
  • Patent number: 8084012
    Abstract: The present invention provides a method for selectively placing carbon nanotubes on a substrate surface by using functionalized carbon nanotubes having an organic compound that is covalently bonded to such carbon nanotubes. The organic compound comprises at least two functional groups, the first of which is capable of forming covalent bonds with carbon nanotubes, and the second of which is capable of selectively bonding metal oxides. Such functionalized carbon nanotubes are contacted with a substrate surface that has at least one portion containing a metal oxide. The second functional group of the organic compound selectively bonds to the metal oxide, so as to selectively place the functionalized carbon nanotubes on the at least one portion of the substrate surface that comprises the metal oxide.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: December 27, 2011
    Assignee: International Business Machines Corporation
    Inventors: Alina Afzali-Ardakani, Phaedon Avouris, James B. Hannon, Christian Klinke
  • Patent number: 8051988
    Abstract: A grain conveying apparatus and system for conveying and separating elements of a grain mixture of a first minimum size, such as cob pieces, and a second maximum size smaller than the first minimum size, such as grain or corn, including an upper passage having at least one aperture generally smaller than the cob pieces and larger than the grain or corn. As the grain mixture is conveyed through the upper passage, the cob pieces will pass across the apertures, and the grain or corn will pass through the apertures to the lower passage thereby separating the elements of the grain mixture as it is conveyed from a source bin to separate receiving bins.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: November 8, 2011
    Assignee: CNH America LLC
    Inventor: Herbert M. Farley
  • Patent number: 8042691
    Abstract: A method of heavy particle separation, including a primary separation stage which includes the steps of dropping, accumulating, concentrating and discharging of heavy particles and/or a secondary separation stage for concentrating heavy particles which includes the steps of infeeding, stilling and retaining such particles.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: October 25, 2011
    Assignee: IE-TEC Licensing Limited
    Inventors: Raymond Brian Brosseuk, Greig Oppenheimer
  • Patent number: 8020705
    Abstract: A screen retention mechanism for use with vibratory separators is disclosed. The screen retention mechanism includes a structural frame mounted to a vibratory separator into which a plurality of lightweight and flexible screen elements are inserted into multiple tows of perforated screen supports. The perforated screen supports are bonded to the structural frame and are aligned parallel to the direction in which solids are conveyed by a vibratory motion. The invention further features an improved retention mechanism whereby screen elements are conveniently and selectively restrained.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: September 20, 2011
    Inventors: Ari M. Hukki, Glenn T. Lilie
  • Patent number: 7905358
    Abstract: Apparatuses for screening granular solid particulate material include a generally planar first screen and a second screen. A plurality of apertures extends through the first screen. At least a portion of the second screen is oriented at an angle to the first screen, and apertures extend through a perforated region of the second screen. The second screen includes at least one region configured to prevent at least some particles of solid material from passing through the second screen.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: March 15, 2011
    Assignee: Alliant Techsystems Inc.
    Inventors: Douglas J. Backes, Clay B. Poulter, Max R. Godfrey, Dennis K. Tolman, Melinda S. Dutton
  • Patent number: 7757864
    Abstract: A screen assembly that is sufficiently flexible to adapt to a non-planar profile of a crowned deck on a vibrating shaker. When attached to the crowned deck, the screen assembly provides a screen with less curvature than the crowned deck.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: July 20, 2010
    Assignee: M-I L.L.C.
    Inventors: Robert M. Barrett, Brian S. Carr
  • Patent number: 7727505
    Abstract: A method for separating carbon nanotubes comprises: providing a mixture of carbon nanotubes; introducing an organic molecule having an end group capable of being chelated by a metal ion to the mixture of carbon nanotubes to covalently bond the organic molecule to at least one of the mixture of carbon nanotubes; and introducing a metal salt to the mixture of carbon nanotubes to chelate the end group of the organic molecule with the metal ion of the metal salt; and centrifuging the mixture of carbon nanotubes to cause the separation of the carbon nanotubes based on a density differential of the carbon nanotubes.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: June 1, 2010
    Assignee: International Business Machines Corporation
    Inventors: Ali Afazali-Ardakani, James B. Hannon, Cherie R. Kagan, George S. Tulevski
  • Patent number: 7584858
    Abstract: A screen assembly that is sufficiently flexible to adapt to a non-planar profile of a crowned deck on a vibrating shaker. When attached to the crowned deck, the screen assembly provides a screen with less curvature than the crowned deck.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: September 8, 2009
    Assignee: M-I L.L.C.
    Inventors: Robert M. Barrett, Brian S. Carr
  • Patent number: 7578394
    Abstract: A screening machine includes wall members, a screen assembly, and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: August 25, 2009
    Assignee: Derrick Corporation
    Inventors: Keith Wojciechowski, Christian Newman
  • Patent number: 7441661
    Abstract: A separator for separating solids and other objects (debris) from a liquid, and having a separator body (2) through which the liquid, having debris entrained therein (16, 19, 20), flows from an inlet (6) to an outlet (13), and a port (5) for diverting flow from the outlet during moderate flows whereby the debris entrained in the liquid is removed. A floor (11) wherein the separator is raised to form a hump (43) adjacent to or in which the opening (5) is located.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: October 28, 2008
    Assignee: Water Solutions (Aust) Pty Ltd.
    Inventor: Donald Ian Phillips
  • Patent number: 6892891
    Abstract: A manure management system that removes a large percentage of solids from a manure slurry when the slurry is run across a series of sloped screen separators. The sloped screen on the separator has very small openings. In addition, the separator has a water line with spray heads formed across the sloped screen. The spray heads direct water under pressure onto the sloped screen. Further, the separator controls the air flow through the sloped screen.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: May 17, 2005
    Inventor: Richard A. Dias
  • Patent number: 6863181
    Abstract: A large percentage of solids are removed from a manure slurry when the slurry is run across a sloped screen separator. The sloped screen on the separator has very small openings. In addition, the separator has a water line with spray heads formed across the sloped screen. The spray heads direct water under pressure onto the sloped screen. Further, the separator controls the air flow through the sloped screen.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: March 8, 2005
    Inventor: Richard A. Dias
  • Patent number: 6830155
    Abstract: There is provided screen apparatus comprising side walls having a lower edge portion configured to accept tubular screen support members. An upper edge extends from the inlet end of the side walls to an apex from which a declining edge extends to the foot of the side walls. The lower edge, upper edge and declining edge are each provided with edge stiffening. A torque tube is secured between the respective exciter mount castings, the torque tube and stiffened side wall being selected to provide that the first fundamental frequency mode greater than the exciter frequency is at least 2 Hz greater than the exciter frequency and the first fundamental frequency below the exciter frequency is at least 2 Hz lower than the exciter frequency.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: December 14, 2004
    Assignee: Ludowici Mineral Processing Equipment Pty Ltd.
    Inventors: Michael Trench, Robert John Allen, Peter Rubie, John Russell, Paul Dalziel, Ben Plant, John Oliver, Neville Warnes, Russell Taylor, John Ettingshausen, Edward McKerr
  • Patent number: 6814242
    Abstract: A rotatively oscillating separator comprising separating vessels 4 each having cone-shaped separating plate 5 disposed in the vessel, and drive means 6 for rotatively oscillating said separating vessels 4, mixed rice consisting of unhulled rice and unpolished rice being fed onto the separating plates in the separating vessels at a given location to separate the unhulled rice and the unpolished rice from each other, the unpolished rice being discharged through raised peripheral portions of the vessels, and the unhulled rice being discharged through the central bottoms of the separating vessels.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: November 9, 2004
    Assignee: Satake Corporation
    Inventors: Hideaki Masukane, Shigeki Kinoshita, Masashi Kageyama, Chozaburo Ikuta, Haruyoshi Yamaguchi
  • Publication number: 20040129611
    Abstract: A novel separator housed within a shell for the separations of solid and liquid components from a slurry. The separator has two stages, a first static screen and rotating brush assembly section and a second stage, with a screen and a roller press and brush assembly. The slurry is pumped into the separator through a weir box. The slurry flows into the first stage and most of the liquid component flows into a sump located below the two stages. The solid component is then directed into the second stage where the rollers squeeze remaining liquids from the solid component. The brushes then direct the remaining solid component of the slurry into a solids discharge area.
    Type: Application
    Filed: September 18, 2003
    Publication date: July 8, 2004
    Applicant: Nutrient Control Systems, Inc.
    Inventors: Bradford H. Whitsel, Timothy N. Rensch, H. Kenneth Kipe
  • Patent number: 6484885
    Abstract: A new and unique design use of directional and re-directional raised ribs on a solids control filtering screen, such as those used in drilling wells for hydrocarbons and other substances, in conjunction with a coordinated system of hanging such screens and directing and redirecting the flow of trapped solids over the surface of such screens, is disclosed for use with a vibratory shaker. The invention counteracts the natural tendency of trapped solids to migrate to and congregate in the lowest areas of a suspended screen and facilitates a dryer fluids discharge, as well as more effectively utilizing the available screening surface area, and therefore the invention reduces the incidence of screen wear and tearing and increases the flow rate conductants and drying capabilities through the screen.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: November 26, 2002
    Assignee: CPI Sales & Mfg., Inc.
    Inventors: Glenn T. Lilie, Fred B. Arehart
  • Patent number: 6149811
    Abstract: The present invention is directed to a continuous, portable dredging system that employs a series of screens and gravity separation devices with flocculation to remove sediments from the dredged slurry. The system produces a treated water stream having low solids content and a recovered solids product having a low water content.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: November 21, 2000
    Assignee: Solomon Ventures LLC
    Inventors: Michael Hodges, Robert Leland Schwartz, George C. Kane
  • Patent number: 6095338
    Abstract: A sieve screen utilizes a frame to support a plurality of profiled screen wires. These screen wires are arranged on the frame in a symmetrical manner about a center line which is transverse or normal to the direction of flow of material to be separated. The sieve screen can be inverted and rotated to extend its life after the profile screen wires initially situated above the transverse central line have lost their separatory effectiveness.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: August 1, 2000
    Assignee: Conn-Weld Industries, Inc.
    Inventors: Michael S. Connolly, Stephen R. Andretich
  • Patent number: 5938936
    Abstract: The present invention is directed to a continuous, portable dredging system that employs a series of screens and gravity separation devices with flocculation to remove sediments from the dredged slurry. The system produces a treated water stream having low solids content and a recovered solids product having a low water content.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: August 17, 1999
    Assignee: Solomon Technologies, Inc.
    Inventors: Michael Hodges, Robert Leland Schwartz, George C. Kane
  • Patent number: 5443162
    Abstract: The production capacity of a conventional high pressure feeder having a pocketed rotor with a slotted screen at the low pressure outlet port is significantly increased by constructing the screen so that its arcuate bars have a width much less than normal, and thus a much greater open area of the screen is provided. Structural integrity is maintained by providing a reinforcing bar extending transverse to the arcuate screen bars, typically attached at the convex mid-point area. The screen is formed from a cast metal body, and the width of the arcuate screen bars is typically between about 0.14-0.20 inches.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: August 22, 1995
    Assignee: Glentech Inc.
    Inventor: Michael I. Sherman
  • Patent number: 5368170
    Abstract: A colander structure is arranged of a generally semi-spherical configuration to include a matrix of first apertures directed therethrough of a first width, with a plurality of annular arrays of second apertures extending from a floor portion of the colander, wherein the second apertures are of a second width substantially greater than the first width to permit the reception of popcorn kernels therethrough to eliminate such kernels, with only fully expanded popcorn components remaining within the colander structure.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: November 29, 1994
    Inventor: Alfred C. Leis
  • Patent number: 5051169
    Abstract: A flour sifter for separating doughballs from fine particulate matter in a breading mixture, comprises a hopper for receiving the breading mixture. The lower portion of the hopper includes a sifting screen along most of the longitudinal length that is sized to allow only the fine particulate matter to pass therethrough. The hopper may be an insert for a sifter table that is readily removably mounted within a flour sifter enclosure. The hopper insert is mounted to accommodate a breading lug above the insert. A slot at one end of the hopper is large enough for the doughballs to pass therethrough. The enclosure is provided with mounting flanges to support another breading lug below the hopper insert to receive the sifted fine particulate matter. A doughball ejector chute is associated with the slot of the hopper insert to direct the doughballs from the hopper insert to a doughball collector pan. The hopper further includes an auger brush having a helical pattern of bristles along the length of the brush.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: September 24, 1991
    Assignee: Ayrking Corporation
    Inventor: Donald E. King
  • Patent number: 4820407
    Abstract: A new and unique pattern and use of flexible ribs on a solids filtering screen, such as those used in drilling wells for hydrocarbons and other substances, in conjunction with a coordinated system for hanging such screens and directing the flow of trapped solids over the surface of such screens, is disclosed. The invention counteracts the tendency of trapped solids to migrate to and congregate in the lowest areas of a suspended screen, and therefore the invention reduces the incidence of screen tearing and increases the flow rate through the screen.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: April 11, 1989
    Assignee: CPI Sales, Inc.
    Inventor: Kenneth R. Lilie
  • Patent number: 4810270
    Abstract: A separator for separating fibers from fines in a flow of gas includes an enclosed housing which includes a cylindrical upper section and a lower section. A screen basket is fixedly mounted in the housing, and this basket defines a screened cylindrical wall, a closed bottom, and an open top. The screen basket is positioned in the housing to define an annular chamber between the upper section of the housing and the screened cylindrical wall of the basket. A first duct is mounted to pass a first flow of gas, fibers and fines into an upper portion of the annular chamber, and is oriented tangentially to cause the first flow to swirl around the screened cylindrical wall. A second duct is mounted to remove gas and fines which have passed through the screened cylindrical wall, and a third duct is mounted to remove gas and fibers which have passed to the lower section of the housing from the lower section.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 7, 1989
    Assignee: Kimberly-Clark Corporation
    Inventors: Byron R. Terry, Kurt Niederer
  • Patent number: 4671877
    Abstract: Dewatering apparatus having a screen with alternate perforate sections and inperforate accelerator sections, both on a slope. The input feed may be pulsed the better to resist any tendency for the screen to blind.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: June 9, 1987
    Inventor: Barrie C. Godbeer
  • Patent number: 4650192
    Abstract: A game toy wherein a vibrator is incorporated in a scooper for scooping up a model piece of a goldfish or the like put in a vessel, and whereby competition is made for catching the model piece in the condition that the vibrations of the vibrator are propagated to the scooper.
    Type: Grant
    Filed: June 4, 1986
    Date of Patent: March 17, 1987
    Assignee: Staff Co., Ltd.
    Inventor: Masatoshi Todokoro
  • Patent number: 4410425
    Abstract: An apparatus for filtering drilling mud that is being recirculated out of the drill hole, which substantially comprises the flow conveying tubular section having at its first end a flanged base portion sealably attachable to the top portion of the hydril and open-ended at its second end for allowing fluid flow therethrough. Also provided is an outer tank portion encapsulating substantially the upper half portion of said tubular section, the tank portion having an open-ended top portion for receiving flow out of the end portion of the flow conveying tubular section and integrally attached at its bottom portion to the outer surface of the flow conveying tubular section, the outer tank portion defining a container for receiving the flow from the tubular section.
    Type: Grant
    Filed: August 5, 1981
    Date of Patent: October 18, 1983
    Inventor: Robert A. Gardes
  • Patent number: 4274952
    Abstract: A sieve chain having upper and lower ends is disposed in a housing and comprises a plurality of sieve sections and hinge means connecting adjacent ones of said sieve sections in series from one of said ends to the other. Each of said sieve sections has an inclination in the general direction from said upper to said lower end. A hinge connects one of said ends of said chain to said housing. An adjusting device is hingedly connected to the other end of said chain. The suspension flows over said sieve chain in the general direction from said upper to said lower end.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: June 23, 1981
    Assignee: Voest-Alpine Aktiengesellschaft
    Inventors: Reinhard Hanke, Kornel Jahn
  • Patent number: 4250038
    Abstract: A sieve or screen of the type supported in an inclined position so that a slurry can cascade downwardly over a working surface of the screen is formed with spaced apart, generally parallel rods or wires which extend transversely to the direction of slurry flow; and is characterized in that the means or hardware which secure the rods in spaced apart and parallel relationship are located at the working surface of the screen, as opposed to the traditional practice of locating such hardware at the opposite or underlying surface of the screen.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: February 10, 1981
    Assignee: Bixby-Zimmer Engineering Co.
    Inventor: Joseph L. Dryden
  • Patent number: 4231861
    Abstract: A grain cleaning apparatus having an upstanding housing with a grain inlet, at least one layer of screens disposed below the inlet and a foreign material receiving chamber disposed below the screen, with separate outlets for foreign material and cleaned grain and integral means for bypassing a selected, infinitely variable, between limits, proportion of incoming grain flow around the screens to the grain outlet.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: November 4, 1980
    Assignee: Parsons Manufacturing, Incorporated
    Inventors: Steven G. Hannie, Terry D. Tucker
  • Patent number: 4133751
    Abstract: A sizing screen for sizing particulate materials, for example, is provided which uses a plurality of wire loops arranged to define a plurality of parallel wire strands extending between a first end and a second end of a screen frame. The frame has anchor means mounted at its first end and tension means at its second end. In the simplest form of the invention, pairs of wire strands are adjusted simultaneously by the tension means. In more advanced forms of the invention, means are provided for adjusting pluralities of the wire loops, each wire loop adjustment corresponding to two wire strand adjustments. The frame is constructed so that the wire strands have a double crown. One crown extends along the width dimension of the frame, and a second crown extends along the length dimension of the frame. The double crown arrangement promotes more even spreading of material as that material travels along the wire screen and is important in maintaining wire strand position.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: January 9, 1979
    Inventor: Joseph E. Stengel
  • Patent number: 4113626
    Abstract: Screening apparatus provides improved dewatering of liquid slurries by flowing the slurry across a generally parabolically shaped perforate screening surface inclined at an angle to the horizontal. The angularity of the generally parabolically shaped screening surface is adjustable at any time or at any point in the screening process. The preferred embodiment of screen assembly, which incorporates multiple bars extending generally transversely of the flow direction of the slurry, is fabricated by a method which facilitates the provision of screening slots of different widths in different areas of the screening surface.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: September 12, 1978
    Assignee: The Black Clawson Company
    Inventor: Theodore E. Detcher
  • Patent number: 4085040
    Abstract: A static screen separator compact in both a vertical and a horizontal sense, including an inclined screen structure and a facing feed or head box from which a liquid-solids mixture overflows onto the screen. The head box is located to the front or flow face of the screen and nests therewith, substantially within the vertical and horizontal limits thereof. The head box embodies means defining an overflow lip which guides the slurry form of the liquid-solids mixture onto the flow face of the screen structure, which lip is flexible as to its contour both in the sense of flow and in a sense transversely thereof. The arrangement assures a smooth transition of the slurry from the head box to the screen flow surface irrespective of the nature or character of the contained solids.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: April 18, 1978
    Assignee: The Bauer Bros. Co.
    Inventor: John J. Egan