Clearers Patents (Class 209/379)
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Patent number: 11906395Abstract: A method includes performing a downhole operation in a borehole; capturing, during the downhole operation, downhole particles and drilling mud at the surface from the borehole into a screen of at least one shaker; shaking the screen to emit vibrations to separate the downhole particles from the drilling mud; defining a vibration limit for a normal operating condition of the at least one shaker; setting a vibration fault threshold based on the vibration limit for the normal operating condition; monitoring, using at least one sensor, the vibrations over time; and determining there is a fault condition for the shaker, in response to the vibrations exceeding the vibration fault threshold.Type: GrantFiled: February 12, 2019Date of Patent: February 20, 2024Assignee: Halliburton Energy Services, Inc.Inventors: Prashant Shekhar, Abhijit Kulkarni, Gillies Alexander MacDonald
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Patent number: 11904361Abstract: A screen plate for a separating device for classifying bulk material along with separating device having at least one screen plate therein classifying bulk material.Type: GrantFiled: August 24, 2020Date of Patent: February 20, 2024Assignee: Wacker Chemie AGInventors: Thomas Aigner, Franz Bergmann, Andreas Schneider, Jonas Killermann
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Patent number: 10052638Abstract: A method of recycling a filler included in artificial turf by sorting the filler into two or more materials, including: a first sorting operation of sorting the two or more materials based on a grain size; and a second sorting operation of sorting the materials, which are sorted by the first sorting operation and have grain sizes belonging to a predetermined range, based on specific gravity.Type: GrantFiled: December 12, 2016Date of Patent: August 21, 2018Assignees: KOLONGLOTECH, INC, SUNGWON RECYCLE CO., LTD.Inventors: Keon Su Park, Young Hoon Kwon, Kwang Su Cho, Kyoung Rok Kong, Ji Young Jang
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Patent number: 9827596Abstract: An assembly for separating selected defective objects from a group of objects used in tobacco industry, the group comprising regular objects having a form of substantially spherical external surface of a determined diameter and the remaining objects being defective objects, the assembly comprising a sieve element (105) having through channels (106) or holes and a generally flat blocking element (107) located under the sieve element, the blocking element having an upper surface/107B) and through holes (108), the sieve element and the blocking element being displaceable in a direction parallel and/or perpendicular with respect to each other at least between a first configuration and a second configuration.Type: GrantFiled: August 11, 2014Date of Patent: November 28, 2017Assignee: INTERNATIONAL TOBACCO MACHINERY POLAND SP. Z O.O.Inventors: Bartosz Cieslikowski, Leszek Sikora, Radoslaw Figarski, Marcin Mamerski
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Patent number: 9827595Abstract: A screening media of a vibrating screen screens fractions of stone or gravel. The screening media is formed of ribs extending from one end of the screening media to the opposite end thereof. Pins projecting perpendicularly from the ribs are placed on opposite sides of the ribs. Each pin ends at a distance from an adjacent rib. The dimension and placement of the pins are such that a continuous aperture is formed between two adjacent ribs. Each aperture is formed of a number of rectangular screening areas of identical size. Each screening area is placed perpendicular to each adjacent screening area and end areas of adjacent screening areas coincide.Type: GrantFiled: March 10, 2014Date of Patent: November 28, 2017Assignee: SANDVIK INTELLECTUAL PROPERTY ABInventor: Mats Malmberg
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Patent number: 8714364Abstract: The present invention relates to a method of manufacturing a rotor for a screening apparatus and a rotor structure for a screening apparatus. The rotor structure is particularly suitable in screening fiber suspensions of the pulp and paper industry. The apparatus relates to a novel rotor construction, and especially to a novel means of fastening a turbulence element on the rotor surface. The rotor is provided with easily replaceable turbulence elements so that at least a part of the rotor has at least one area —having a surface configuration different from the remaining rotor surface, on which area the turbulence element is fastened.Type: GrantFiled: August 5, 2009Date of Patent: May 6, 2014Assignee: Aikawa Fiber Technologies TrustInventor: Mathieu Hamelin
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Patent number: 8201693Abstract: An apparatus and method for separating solids from a solids laden drilling mud (14), the method comprising the steps of introducing solids laden drilling mud to a first side of a screen (13), the drilling mud passing through the screen (13) and screened drilling mud located the other side of the screen (13) characterized in that an oscillating tray (18) is located in the drilling mud and spaced from the screen, the oscillating tray imparting motion to the drilling mud to facilitate screening of said solids laden drilling mud in the screen (13).Type: GrantFiled: May 26, 2006Date of Patent: June 19, 2012Assignee: National Oilwell Varco, L.P.Inventor: Helge Sorensen Jan
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Patent number: 7445121Abstract: A dynamic separator for the processing of minerals such as coal is provided. The dynamic separator includes two movable trays that are pivotally connected to each other and actuated by a specially constructed crankshaft. The positive motion of the trays makes it possible to obtain a uniform water pulse distribution, thereby preconditioning the stimulation of mineral processing. In addition, energy consumption for mineral processing is substantially reduced, structural design of the device is simplified, and the reliability thereof is significantly increased. Good technical results of mineral processing and high reliability and operability is thereby achieved.Type: GrantFiled: August 4, 2003Date of Patent: November 4, 2008Inventors: Burkit Mainin, Gulnar Ermekova, Zhanat Mainina, Zhibek Mainina
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Patent number: 7416085Abstract: The invention relates to a sieving device provided with a sieving mat (2), which has sieving openings, and with beating elements (7), which are located underneath the sieving mat and which strike against the underside of the sieving mat (2) in order to free the sieving mat (2) from material to be sieved that is clogging the sieving openings. Said beating elements (7) are fastened to at least one elongated tensioned traction mechanism (5) such as a cable or band that extends underneath the sieving mat (2).Type: GrantFiled: June 26, 2003Date of Patent: August 26, 2008Assignee: Ludwig Krieger Draht- und Kunststofferzeugnisse GmbHInventor: Rolf Kadel
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Patent number: 7389882Abstract: A self-cleaning screen assembly for a vibratory separator is disclosed. The self-cleaning screen assembly includes a peripheral frame having a top mounting surface to which at least one screen cloth is affixed and a bottom mounting surface to which a flow through support screen is affixed. One or more cleaning elements are freely located between the support screen and the screen cloth. The peripheral frame includes a rigid support section, a cushioned top strain relief zone, and a cushioned bottom strain relief zone. The top strain relief zone, the bottom strain relief zone and the rigid support section may be discrete components wherein the strain relief zones are formed by strain relief pads that are located adjacent to a rigid support member. The top strain relief zone provides cushioned support to the screen cloth around the edge of the screen frame adjacent to the opening. The bottom strain relief zone provides cushioning for the support screen.Type: GrantFiled: July 9, 2007Date of Patent: June 24, 2008Assignee: M-I L.L.C.Inventors: Eric Cady, Brian Carr
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Publication number: 20080017555Abstract: A sieve box for the particle separation process is composed of a box with a pan, a mesh covering, and at least one cleaning device. The cleaning device serves a dual purpose brushes or knobs bounce against the mesh covering while the leg portion continually moves particulate in the pan.Type: ApplicationFiled: July 23, 2006Publication date: January 24, 2008Inventor: Andreas Schumacher
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Patent number: 7182206Abstract: A screening system including a vibratory screen separator having a resiliently mounted frame with a low frequency vibratory drive coupled to that frame. A taut screen is rigidly mounted in the frame and a vibration transmitter assembly is resiliently mounted to the frame and fixed to the taut screen. The vibration transmitter includes a planar ring compressed against the taut screen and vibration generators. The vibration generators are air turbines with eccentric weights. The frame includes support elements extending from the cylindrical outer housing sections of the separator to a concentrically mounted support ring. Compressed air is provided to the turbines through hollow structure within the frame. Valves control exhaust from the turbines. The low frequency vibratory drive operates in a range of about 8 Hz to 30 Hz while the vibration generators provided by the air turbines operate in a range of about 275 Hz to 600 Hz.Type: GrantFiled: May 1, 2003Date of Patent: February 27, 2007Assignee: M-I L.L.C.Inventors: Ari M. Hukki, Peter D. Knox
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Patent number: 7017755Abstract: Rear ends of pushing rods 40 are axially connected to a support base 50, which is movably engaged with guide rails 60. A drive unit 70 is disposed to rotatably move wire belts 74 between wheels 73 and 71 at longitudinal front and rear ends of the guide rails 60, and the support base 50 is connected to the wire belts 74. The drive unit 70 is activated to guide the pushing rods 40 by the guide rails 60 so to make pushing and pulling operation of the pushing rods 40. A door 33 which is disposed at the back wall of a static grate 31 in a clinker cooler 30 is opened to fit the pushing rods 40 into a seal material 34 on the opening to push a large lump of coating C2 retained on the static grate 31. The pushing rods 40 have a double tube structure and are cooled by injecting cooling water from supply pipes 45.Type: GrantFiled: May 31, 2000Date of Patent: March 28, 2006Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Masura Nakamura, Tsuyoshi Yamamoto, Asaaki Nishioka, Shigetoshi Toyooka, Yasufumi Matsuo, Shunichi Nagasaki
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Patent number: 6953122Abstract: A screening machine that includes a screen having a periphery and a central porous region is provided. A motion amplifier is substantially rigidly attached in direct contact with the periphery of the screen and not in direct contact with the central porous region. A transducer is substantially rigidly attached to the motion amplifier, wherein the transducer imparts a vibratory motion to the screen via the motion amplifier.Type: GrantFiled: December 17, 2002Date of Patent: October 11, 2005Assignee: Quality Research, Development & Consulting, Inc.Inventor: Daryoush Allaei
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Patent number: 6938778Abstract: A screening machine having a base is provided. A screen is coupled to the base to separate material by size. The screening machine includes a vibration motor having piezoelectric elements and a vibration amplifier located between the piezoelectric elements and the screen. One or more of the piezoelectric elements can be used as sensors to provide feedback for operation control.Type: GrantFiled: December 17, 2002Date of Patent: September 6, 2005Assignee: Quality Research, Development & Consulting, Inc.Inventor: Daryoush Allaei
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Patent number: 6925961Abstract: A pet litter apparatus has an upper screen to retain litter and debris, a plurality of upper bars, a lower plurality of bars, mechanism for lowering the lower plurality of bars to define spaces for passage of particulate matter between the upper and lower bars, by rotating rods on sprockets to lower the second plurality of bars.Type: GrantFiled: October 14, 2003Date of Patent: August 9, 2005Inventor: Dennis M. Langdale
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Patent number: 6726023Abstract: The invention relates to a method and an arrangement for cleaning the screening device (2) of a screen (1). The screen (1) comprises at least said screening device (2) which has openings for the separation of particles of different sizes into fine material and coarse material, an actuator means for moving the screening device, a first conveying means (4) for guiding the material to be screened to the screening device (2) of the screen and a second conveying (8) means for moving the fine material that has passed through the screening device (2) and means (9) for guiding the separated coarse material away from the screen (1). For cleaning the screening device (2) a material is blown with the pressure medium at least at intervals through the screening device (2) in the opposite direction regarding fine material passing through, the particle size of which material being at least mainly smaller than the size of the openings of the screening device (2).Type: GrantFiled: February 27, 2002Date of Patent: April 27, 2004Assignee: Raumaster OyInventors: Juha Junnila, Jouko Måkilå
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Patent number: 6685028Abstract: A screening panel assembly (10) includes a frame (12) on which a screening panel (14) is supported. The frame (12) has frame members and intermediate members with the panel (14) being secured only to the frame members of the frame (12).Type: GrantFiled: November 1, 2001Date of Patent: February 3, 2004Assignee: Weatherford Australia Pty. LimitedInventor: Peter Martin Olsen
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Patent number: 6609617Abstract: A trommel for classifying and sorting objects. The trommel is an open cylinder including a drive plate and a feed plate. A series of supporting rods extend between the drive plate and the feed plate. Disposed therebetween is a rod support ring dividing the trommel into a classifying zone and a discharge zone. A plurality of vibrating rods, floating in the vicinity of the rod support ring and anchored to the feed plate, oscillate and flex as the trommel rotates causing preselected sized objects to pass through the vibrating and support bars while the remaining objects are passed into the discharge zone with reduced clogging.Type: GrantFiled: April 8, 2002Date of Patent: August 26, 2003Assignee: Inco LimitedInventors: Ralph Edward Slayer, Barry Ross Bowerman, Kenneth Erwin Scholey
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Patent number: 6550620Abstract: The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.Type: GrantFiled: January 19, 2001Date of Patent: April 22, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hiromi Fukudome, Koukichi Maedera
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Patent number: 6543620Abstract: A screening machine that uses electrically controlled transducers to vibrate a separating screen. The transducers can be piezoelectric patches, discrete piezoelectric components, or electromagnetic shakers. Further, the transducers can be coupled directly to the screen or through a vibration amplifier. The transducers and/or amplifiers can be coupled to the screen at different attachment locations. One or more of the transducers can be used as sensors to provide feedback for operation control.Type: GrantFiled: February 23, 2001Date of Patent: April 8, 2003Assignee: Quality Research, Development & Consulting, Inc.Inventor: Daryoush Allaei
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Patent number: 6364118Abstract: A sieve insert for a cylinder sieve machine, and especially for a tumbling sieve machine. A sieve insert is provided with the features of a level sieve onto which the material to be sieved is charged, a rebound bottom substantially parallel and arranged at an interval to the sieve and carries a plurality of rebound bodies, a sieve frame for carrying the sieve, and a carrier frame carrying the rebound bottom and the sieve frame. The sieve insert is subdivided into a series of sieve segments, in which sieve frame supports the sieve segments along their contours.Type: GrantFiled: July 26, 2000Date of Patent: April 2, 2002Assignee: Allgaier Werke GmbHInventors: Helmuth Anderle, Joachim Heer, Wolfgang Weiss
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Patent number: 6360895Abstract: A separating device for elongate solid pieces includes a vibrating base with longitudinal grooves having a depth which decreases in a conveying direction, to allow efficient separation of elongate solid pieces, in particular of short pieces of wire, and to allow the separating device to operate continuously. The longitudinal grooves are adjoined by elongate, e.g. V-shaped, screen openings for separating the elongate solid pieces. Wide solid pieces can slide over the screen openings. The separating device is suitable in particular for separating small pieces of wire out of pyrolysis residue from a pyrolysis plant.Type: GrantFiled: November 22, 2000Date of Patent: March 26, 2002Assignee: Siemens AktiengesellschaftInventors: Reinhold Riggenmann, Winfried Von Rhein, Helmut Werdinig
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Patent number: 6305552Abstract: An apparatus for separating tobacco stem particles from a mixture containing such particles and tobacco stalk particles obtained in a threshing and separating process employed in a tobacco stemmery includes a hollow drum having a longitudinal axis, the hollow drum being mounted for rotational movement about its axis and the axis being disposed at a slight angle with respect to the horizontal so as to establish a higher inlet end and a lower outlet end of the hollow drum. A mixture handling structure is constructed and arranged with respect to the inlet end of the hollow drum to feed a supply of a mixture containing tobacco stem particles and tobacco stalk particles obtained in the threshing and separating process into the inlet end of the hollow drum.Type: GrantFiled: March 9, 2000Date of Patent: October 23, 2001Assignee: Universal Leaf Tobacco Company, Inc.Inventor: G. A. John Coleman
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Publication number: 20010011641Abstract: The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.Type: ApplicationFiled: January 19, 2001Publication date: August 9, 2001Inventors: Hiromi Fukudome, Koukichi Maedera
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Patent number: 6220447Abstract: A variable frequency screening device consisting of a pair of spaced elongated side members, a flexible screen surface supported between the side members, a frame member supported between the side members and beneath a flexible screen surface, at least one striking frame shaft rotatably mounted between the elongated side members and beneath the flexible screening material, a striking frame mounted to the striking frame shaft, a second striking frame mounted to the striking frame shaft, and a motor to rotate the striking frame shaft which, in turn, causes the first and second striking frames to alternately strike the underside of the flexible screen material. The apparatus is equipped to permit the striking frames located on additional striking frame shafts to strike the screening material at independently selected amplitudes and frequencies.Type: GrantFiled: February 17, 1999Date of Patent: April 24, 2001Inventor: Gene F. Lambert
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Patent number: 6193073Abstract: Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor in which a single impulse or foil member is carried or positioned to move along a discrete portion of the screen surface. This arrangement improves efficiency of operation of the pressure screen by reducing the rotational effect of the rotor on the stock suspension being screened and by providing a less disturbed screening region through which the single foil operates. Embodiments are shown in which multiple single impulse elements sweep over discrete portions of a screen and in which a single foil is combined, in screening apparatus, with multiple foils in accordance with the increase in consistency of the stock as it passes through the screen.Type: GrantFiled: August 6, 1998Date of Patent: February 27, 2001Assignee: Thermo Black Clawson Inc.Inventors: David E. Chupka, Peter Seifert, Christopher M. Vitori
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Patent number: 6129215Abstract: A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove the debris from the screen. Automatic and controllable raking operations are provided to handle the situation in which there is debris jammed in the screen. The jammed debris resists the movement of the rake along the screen, which is sensed via rake motor overloaded, indicated by motor current in excess of a limit. The existence of a jammed rake causes positive release of the rake from the face of the bars, and further movement of the rake is controlled according to the nature of the problem which caused the jamming.Type: GrantFiled: January 19, 2000Date of Patent: October 10, 2000Assignee: Meurer Industries, Inc.Inventors: Joseph Karl Brauch, Jerry Boyd Francis, Charles Lonnie Meurer, Douglas Lee Meurer
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Patent number: 6105785Abstract: A pair of cylindrical composite rollers formed of a metallic drum having a thick outer elastomeric layer are mounted transversely in a rectangular frame of a drilling mud separation unit over which a wide endless-loop chain-link belt is driven in a continuous loop moving along the longitudinal axis of the frame. The drive roller has a plurality of axially spaced circumferential rows of radially extending teeth that are machined in the surface of the elastomeric material. The endless belt is formed of a plurality of laterally adjacent jointed links hinged together by transverse rods. As drilling mud or drilling fluids are conducted onto the moving belt, liquids and particles smaller than the openings in the belt pass through the openings and liquids and particles larger than the openings are transported on the moving belt and are discharged off of one end as the belt completes its path.Type: GrantFiled: September 3, 1998Date of Patent: August 22, 2000Inventor: J. Terrell Williams
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Patent number: 6095339Abstract: A sieve box for a particulate sifter has a pan, a screen, and a number of screen and pan clearing devices. Each device has a first member with fingers engageable with the pan to remove particulates that accumulate on the pan and a second member with fingers adapted to engage the screen to clean the screen or particulates. The first and second members have cooperating structures that movably connect the structures to allow free combined lateral movement in the sieve box and independent relative rotational, vertical and wobble movements.Type: GrantFiled: June 1, 1999Date of Patent: August 1, 2000Assignee: Filip GmbHInventor: Hans Dieter Filip
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Patent number: 6073773Abstract: A method and a device for the separation of semiconductor material has the separation procedure carried out on screens coated with ice made of ultrapure water, optionally mixed with particles of semiconductor material. During the separation, the screens are sprayed with ultrapure water and the screen holes are cut free.Type: GrantFiled: October 1, 1999Date of Patent: June 13, 2000Assignee: Wacker-Chemie GmbHInventors: Reinhard Wolf, Dirk Flottmann
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Patent number: 6016920Abstract: A programmed bar screen cleaner removes debris from a screen positioned in a channel to prevent the flow of the debris to a liquid treatment. A rake has tines for engaging the screen to move the debris toward and past an upper end of the screen to remove the debris from the screen. Automatic and controllable raking operations are provided to handle the situation in which there is debris jammed in the screen. The jammed debris resists the movement of the rake along the screen, which is sensed via rake motor overloaded, indicated by motor current in excess of a limit. The existence of a jammed rake causes positive release of the rake from the face of the bars, and further movement of the rake is controlled according to the nature of the problem which caused the jamming.Type: GrantFiled: February 3, 1997Date of Patent: January 25, 2000Assignee: Meurer Industries, Inc.Inventors: Joseph Karl Brauch, Jerry Boyd Francis, Charles Lonnie Meurer, Douglas Lee Meurer
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Patent number: 6010013Abstract: A universal bar screen cleaner removes debris from a screen positioned in a channel guiding a flow of liquid, solids and the debris. The screen is to prevent the flow of the debris to a liquid treatment basin downstream of the screen. The screen has an upper end, a front side facing the upstream flow and a back side facing the downstream flow. A rake has tines for engaging the screen to move the debris toward and past the upper end of the screen to remove the debris from the screen. A frame supports the rake in a first rake position where the tines are engagable with the screen from the front side, or in a second rake position where the tines are engagable with the screen from the back side.Type: GrantFiled: February 3, 1997Date of Patent: January 4, 2000Assignee: Meurer Industries, Inc.Inventors: Joseph Karl Brauch, Charles Lonnie Meurer, Douglas Lee Meurer
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Patent number: 5810175Abstract: An apparatus for sorting round produce by diameter size using a conventional transport conveyer assembly and including a sorting size adjustment mechanism to automatically adjust the produce sorting size and an anti-pinch mechanism to prevent damaging the produce during the sorting process is disclosed. The conveyer assembly has a horizontal top run and a V-shaped bottom return run formed by a plurality of elastic conveyer bands trained about three elongated roller shafts. The conveyer bands are spaced across the width of the roller shafts at a fixed horizontal distance. As the produce is transported across the top conveyer run, the produce, whose diameter is smaller than the spacing between the adjacent conveyer bands, falls between adjacent conveyer bands for collection and the remaining produce travels to the end of the top conveyer run for separate collection.Type: GrantFiled: September 30, 1997Date of Patent: September 22, 1998Inventor: Robert L. Williamson
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Patent number: 5799799Abstract: A device for screening cohesive material, and for eliminating screen blinding, is disclosed. The device includes a transducer for transmitting ultrasonic frequency throughout the screen surface, with the transducer supported independently of the screen in order to prolong screen life and to lower screen replacement costs. The transducers are provided with adjustable mounting means in order to adjust the transducer position with respect to the screen.Type: GrantFiled: May 6, 1996Date of Patent: September 1, 1998Assignee: Kason CorporationInventors: Hossein Alamzad, William Zhao, Alfred Heidinger
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Patent number: 5476178Abstract: The invention concerns a rotor for the pressurized, hydrodynamic purification of paper pulp from old papers in known purifying equipment comprising a cylindrical screen, characterized in that it comprises a generally cylindrical case extending along a longitudinal axis of rotation 6 and comprising a sequence of n identical elements 8 arrayed side-by-side along the longitudinal axis 6, the screen-side wall evincing a shoulder 14 on either side of which it winds spirally around the longitudinal axis over at least 360.degree., the base and the top of the shoulder subtending a very slight angular gap .OMEGA. relative to said axis in such manner that the shoulder side 14 slopes toward the screen surface, the slope angle .alpha. relative to the radial plane through the shoulder base being between 5 and 80.degree., the elements 8 being mutually shifted in the direction of rotation around the axis 6 by an angle .beta. with a magnitude of at least 360.degree./n, where n is at least 3.Type: GrantFiled: June 14, 1994Date of Patent: December 19, 1995Assignee: E & M LamortInventor: Jean-Pierre Lamort
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Patent number: 5385240Abstract: Apparatus for screening a papermaking pulp or stock suspension through a stationary cylindrical screen includes a rotating hydrofoil member which has a curved outer or camber surface portion mounted for rotation with the camber surface in a close but spaced proximity to the inside surface of the screen, in which a discrete part or segment of the body of the member is movable with respect to the body and defines a portion of the curved camber surface, so that the effective spacing between the curved surface and the adjacent inside surface of the screen may be adjusted. The hydrofoil is fabricated from sheet metal and forms an outwardly opening spanwise slot, and a sheet metal fabricated segment is received within the slot and forms a substantial continuation of the outer surface, and is adjustable by a threaded fastener which is accessible through a slot formed in the face surface of the hydrofoil.Type: GrantFiled: April 30, 1993Date of Patent: January 31, 1995Assignee: The Black Clawson CompanyInventors: John J. Egan, III, James R. Jamieson, David E. Suica, Gary S. Williamson
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Patent number: 5190160Abstract: A method and apparatus for enhancing knot transport in a knot drainer has a provision for decreasing tangential velocity of the feed slurry in the inlet chamber, a hydrodynamic force reduction provision in the screening chamber, and a provision for increasing the ratio of circumferential friction forces to axial friction forces in a housing extension above the screening chamber. This drastically reduces frequency of knot transport interruptions which would otherwise occur in the knot drainer, thereby improving knot drainer performance efficiency.Type: GrantFiled: August 2, 1991Date of Patent: March 2, 1993Assignee: Ingersoll-Rand CompanyInventors: Patrick D. Murphy, Ian J. H. Clarke-Pounder, Brian J. Gallagher
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Patent number: 5082553Abstract: An aggregate collecting apparatus. A meter which measures the gross weight of the rotary drum is linked to the speed change gear for the rotary drum in such a manner as to be operationally connectable therewith so that the speed of rotation of the drum can be varied in accordance with variations in the amount of sludge charged in the drum. The upstream and downstream edges of a trommel in the rotary drum are intermittently twisted in each of opposite directions so that gravel clogging the trommel is automatically removed.Type: GrantFiled: December 18, 1990Date of Patent: January 21, 1992Inventor: Masao Tanii
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Patent number: 5078878Abstract: A rotor is disposed concentrically within a cylindrical screen. The rotor carries a plurality of blades in close proximity to the screen to produce hydrodynamic pulses opposing fluid flow to clear the screen. Each blade includes a first portion affixed to the rotor, this first portion including an inclined face and a substantially raidally extending face. A second portion of the blade is removably affixed to the radially extending face of the first portion. The removable second portion extends radially beyond the first portion. After the removable portion has become worn from extended use, it can be removed and replaced with a new second portion. In a preferred embodiment, the thickness of the second portion of the blade is equal to or greater than the diameter of holes in the screen. It is also preferred that the length of the second blade portion extending beyond the first portion be greater than the diameter of holes in the screen.Type: GrantFiled: July 7, 1989Date of Patent: January 7, 1992Assignee: Bird Escher WyssInventor: Ernest J. Charette
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Patent number: 5071544Abstract: A filtering device is provided for solid wastes which includes a rotating drum having longitudinal rows of separating holes located through its outer surface. Plates are located between these rows and extend from the drum at a predetermined height in proportion to the radial dimensions of the holes. The plates can be continuous of discontinuous and can extend either perpendicularly relative to the drum or slightly inclined relative to the drum in a direction opposite the rotation of the drum. If desired, transversely extending plates may also be employed. The plates prevents clogging due to the phenomena of winding wherein fibers exit a hole and re-enter another hole as the drum rotates.Type: GrantFiled: October 16, 1989Date of Patent: December 10, 1991Inventor: Cerroni, Manlio
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Patent number: 4944874Abstract: A centrifugal filter separator includes a detachable tubular screen disposed between an annular filter and the inner peripheral surface of a basket, the screen having an annular flange detachably connected to an open end of the basket from the outside of the basket. The centrifugal separator having such detachable screen is applicalbe to centrifugal separation of various materials.Type: GrantFiled: October 25, 1988Date of Patent: July 31, 1990Assignee: Kabushiki Kaisha Okawara SeisakushoInventors: Masaru Kobayashi, Sumio Kawai
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Patent number: 4861462Abstract: A screen unit for a screening machine comprises a screen layer which is bonded to a screen frame spanning an opening thereof. The screen layer is uniformly heated before such bonding is effected so that cooling after bonding generates a tension in the screen layer to allow it to have a trampoline or drumhead vibratile action. The tension is maintained by a reinforcing frame embedded in the frame body.Type: GrantFiled: September 11, 1987Date of Patent: August 29, 1989Assignee: Hein, Lehmann AGInventors: Wolfgang Lehmann, Christian Neukam
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Patent number: 4832834Abstract: A process of manufacture of a lattice configurated elastomer screen for classification, screening and washed of fragmented hard stocks of material. The process of manufacture of this lattice screen employs a cutting device with at least one rotary cutting blade. for extracting mutually spaced slots in the top and bottom layers of an elastomer sheet; with the top slots lying essentially above the bottom slots; being disposed transversely of one another. The top and bottom slots are cut at a common, intersecting depth of one another in the elastomer sheet: joining the bottom slots with the top slots; forming preferably rectangular apertures between the top and bottom slots areas of this lattice designed sifting body.Type: GrantFiled: July 11, 1988Date of Patent: May 23, 1989Inventor: Howard R. Baird, Jr.
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Patent number: 4776951Abstract: An improved screening apparatus for fiber suspensions is provided comprisingat least one stationary, generally cylindrical screen drum into which the fiber suspension is fed having a central axis and a plurality of apertures through which rejectable material from the suspension cannot pass and is retained on a reject side of the drum and through which accepted fibers from the suspension can pass to an opposite side of the drum;a generally cylindrical rotor, co-axial with the axis of the cylindrical screen drum;the rotor supporting a series of blades arranged circumferentially about the rotor and substantially aligned with the longitudinal axis of the rotor, with the lateral extent of each blade being adjacent the surface of the cylindrical screen drum; andeach blade in the series of blades having opposing ends and being inclined in the opposite direction to any adjacent blade relative to a line in the circumferential path of the blades which is parallel to the longitudinal axis of the rotor and the cylindricaType: GrantFiled: December 22, 1986Date of Patent: October 11, 1988Assignee: Hymac Ltd.Inventor: Stephen A. Rowland
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Patent number: 4763794Abstract: An apparatus for sorting produce by size is disclosed. The produce travels over a series of openings (34), ranging from small to large. The produce falls through the openings and is collected beneath them. The openings are adjustable (91) to handle various types and sizes of produce. A plurality of fingers (52) is provided which move from below up into the openings to dislodge any produce jammed in the openings.Type: GrantFiled: July 30, 1986Date of Patent: August 16, 1988Assignee: Billington Welding and Mfg.Inventors: Charles J. Billington, III, Richard K. Oyama, Kenneth H. Jepson, Thomas R. Skeen
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Patent number: 4717471Abstract: In screening apparatus for paper making fiber incorporating a cylindrical screen member provided with cylindrical screening perforations, each of the perforations is characterized by a concentric frustoconical inlet end portion having a maximum diameter at the inlet surface of the screening member which is substantially greater than the portion of the perforation of minimum diameter, the maximum diameter of these inlet end portions being such that adjacent such portions closely approach or intersect each other to define multiple ridges on the surface of the inlet side of the screening member.Type: GrantFiled: June 4, 1987Date of Patent: January 5, 1988Assignee: The Black Clawson CompanyInventor: Jimmy L. Winkler
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Patent number: 4702826Abstract: Disclosed is a device for sequentially cleaning the screens of a particle size analyzer of the indexing drum type, as each screen moves out of the screening position. The cleaning member is preferably removed from the drum during each screening step. The particles dislodged from the screen being cleaned are returned to the sample being analyzed in a manner which maintains the accuracy of the analysis. In an alternative embodiment, each screen is cleaned during a screening step, at an indexed position other than the screening position.Type: GrantFiled: February 3, 1986Date of Patent: October 27, 1987Assignee: Rotex, Inc.Inventor: Glenn J. Pogue
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Ultrasonic vibration sieving apparatus and process for purifying carbon black by using the apparatus
Patent number: 4693879Abstract: A process for purifying carbon black which contains solid impurities by removing the solid impurities thererom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to sieving treatment by an ultrasonic vibration sieving apparatus.Type: GrantFiled: October 9, 1985Date of Patent: September 15, 1987Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Shushichi Yoshimura, Yasunori Hiwatashi, Hiromu Kobayashi, Hozo Yamazaki, Nobu Nishino, Teruji Tahara, Hidenobu Kobayashi -
Patent number: 4680108Abstract: A device for screening fluidizible suspensions, such as medium consistency (e.g. 6-15 percent solids) paper pulp includes a housing with a main suspension inlet and a main (rejects) outlet. A rotor having a plurality of ribs is mounted in the housing for rotation about an axis. A stationary screen, which may be a planar screen or a cylinder, is disposed in the housing between the main inlet and outlet. The stationary screen defines, with the housing, a chamber, and the rotor is positioned so that the ribs sweep past the screen, with only a small clearance between the screen and ribs. One or more dividing walls divide the chamber into a plurality of accept chambers, the dividing wall(s) extending radially when the screen is cylindrical, and parallel to the axis of rotation when the screen is planar. Dilution liquid may be added at the wall area between accept chambers. A rotor in the shape of a drum is used with the cylindrical screen, and a disc shaped rotor with the planar screen.Type: GrantFiled: March 4, 1986Date of Patent: July 14, 1987Assignee: Kamyr ABInventor: Bjorn Ahs