Rubber Preparation Patents (Class 241/DIG31)
  • Patent number: 6102311
    Abstract: A waste substance is crushed and separated into a crushed waste metallic substance and a crushed waste non-metallic substance by the crushing in the fine adjustment in mm unit and striking by hammers, and then discharged out of a shredder through box-shaped spaces having an inclined plane of an inclined upper shredder damper rocking by the fine adjustment in mm unit of the shredder. Thereby the waste substance is crushed and separated securely and efficiently, and the crushed waste metallic substance in 2-5 mm unit and the crushed waste non-metallic substance can be manufactured in the state that they are valuable as articles of commerce and can be effectively utilized as resources. When the crushed waste metallic substance is supplied to a furnace, the melting speed can be improved and the fuel cost necessary for the melting can be saved. Also the invention contributes to prevention of abuses such as environmental pollution by soot and smoke and the contamination of the atmosphere.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: August 15, 2000
    Assignee: Fujikawa Kinzoku Co., Ltd.
    Inventor: Masakazu Fujikawa
  • Patent number: 6095440
    Abstract: An apparatus for devulcanizing vulcanized rubber or crosslinked polymeric material has an ultrasonic exposure portion including a body forming an exposure channel through which particles of the material flow and an ultrasonic generator including a horn extending generally traverse to the direction of the material flow. The apparatus also has a preconditioning portion for feeding the particles to the ultrasonic exposure channel. The method for devulcanizing vulcanized rubber or crosslinked polymeric material comprises the steps of preconditioning and feeding particles of the material, including heating the particles; feeding the particles through a pressurized exposure channel; and exposing the particles to ultrasonic energy within the exposure channel with an ultrasonic wave propagated in a direction traverse to the direction of the channel to effect devulcanization by breaking chemical bonds in the material.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: August 1, 2000
    Inventors: Paul R. Roberson, Tim M. Boron
  • Patent number: 6086452
    Abstract: A method for correcting the radial run-out and radial force variation of a pneumatic tire (12) with a tire uniformity machine (10). The tire is rotated at a high speed and radial run-out is measured. A center grinder assembly (24) is incrementally advanced into contact with sections of the tire having intrinsic radial run-out until all values of radial run-out about the tread circumference are within an acceptable value of radial run-out. In addition to the advancement of the center grinder assembly (24), top and bottom tread shoulder grinders (40A, 40B) may be advanced into contact with sections of the tire having phase adjusted lateral run-out. The extent of the advancement of the shoulder grinders into contact with the tread shoulders of the tire is dictated by a control signal generated by a computer program from the initial measurements of radial run-out.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: July 11, 2000
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: George Jeffrey Lipczynski, Gino Salvador Vicini, John Michael Maloney
  • Patent number: 6082642
    Abstract: An apparatus for pulverizing a collection of pieces of materials such as vulcanized rubber to create a very fine powder. The apparatus includes a piston and a cylinder which places the material to be pulverized under extremely high pressure of at least 1,000 psi and forcing the compressed material out of one or more exit ports. These exit ports are located at the end of a smoothly narrowed channel leading to the exit ports. A rapidly moving cutter is positioned so that its path completely covers the exit port. The compressible materials are thus compressed to the point where they have no voids and provide a solid incompressible cuttable face. The rapidly moving cutter creates a fine powder at the exit port.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: July 4, 2000
    Inventors: Robert J. Vieley, Kermit L. Achterman
  • Patent number: 6056216
    Abstract: The method for shredding wornout tire cases comprises exposing wornout tire cases to the effect of an explosion exerted thereon in a closed circular system so as to establish a directional circulating flow of explosion products. The device for carrying the method into effect comprises a chamber (1, 2) and a piping (3, 4) which forms, together with the chamber, a circular closed system, the chamber has a portion shaped as a cone-frustum shell (1), wherein shredding members (7) and a fixing unit of the explosive (13) are accommodated; a the smaller-diameter portion of the cone-shaped shell (1) communicates with one end of the piping (4) through a valve appearing as, e.g., a grid established by plates (7) in the area of the smaller base of the shell (1), while the other end of the piping (3) communicates with the chamber (1, 2) from the side of the larger-diameter portion of the cone-shaped shell (1).
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: May 2, 2000
    Assignee: Obschestvo S Ogranichennoi Otvetstvennostju "Explotekh"
    Inventor: Alexandr Andreevich Nabok
  • Patent number: 6047911
    Abstract: A method for reclaiming rubber comprising the steps of (a) producing scrap from used rubber materials; (b) milling said scrap to produce rubber crumbs characterised in that the crumbs of said milling step (b) are continuously fed to the milling machine at compression force preferably 100 metric tonnes and the temperature of the crumb feed being milled is maintained at a suitable temperature so as to obtain the reclaimed rubber. The preferred embodiment of the invention provides for a cooling system to keep the temperature of the milling process below 100.degree. C., the pressure being exerted by the mill rolls at close to zero nip with roll speeds at a 1:1.6 ratio, and the surfaces of the rolls are smoothen. Most preferably, the compression force is equivalent to 200 metric tonnes in weight and the crumb feed is continuously milled for about 30 revolutions.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: April 11, 2000
    Inventor: Choo Kiat Yap
  • Patent number: 6036128
    Abstract: A tire shredding machine which does not require the massive amount of machinery required for existing tire shredders and which is safe and simple to use is disclosed. The tire shredding machine of the present invention essentially includes a housing with a safety hood, several wheels, and guide elements or wings. In order to shred a tire, the tire is cut in half and each half is fed into the machine one at a time. The safety hood remains in an open position until the tire is fed into the machine. Once the tire is in the machine, the hood is placed into a closed position, a switch is activated, and the wheels pull the half of the tire into the machine. The tire contacts the guide elements which, in turn, spread out or flatten the tire so that the tire may be fed into a grinder which shreds the tire.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: March 14, 2000
    Assignee: Common Ground Recycling, Inc.
    Inventor: Neal Cramer
  • Patent number: 6015105
    Abstract: A machine, a method, and an air-cooled cutting brush for removing tread material for recycling from used motor vehicle tires prior to scrapping or retreading without damaging the tire cords and beads. The tread material is removed as fine particles, or buffings, ready for recycling without subsequent sorting out of cloth or metal. A tire is mounted in an upright position on a tire receiving assembly which expands to grip the tire beads. The tire receiving assembly is mounted on a supporting structure which pivots. An elongate, powered, rotating, cutting brush is mounted on a rolling mounting structure which moves the cutting brush into and out of engagement with the tread on the outer, ground-contacting portion and on the sidewalls of a tire. In operation, the tire is rotated as the cutting brush engages the tread material of the ground-contacting portion, the supporting structure is then pivoted to remove the tread material of one sidewall, and repeated on the opposite sidewall.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: January 18, 2000
    Assignee: Garb-Oil & Power Corporation
    Inventor: John C. Brewer
  • Patent number: 5975440
    Abstract: Batch mixing takes place in the gap (3) between grooved faces of counter-rotating discs (1,2) such that the spiral grooves (8) and lands (10) of each face traverse the grooves (8) and lands (10) of the other, to shear and split material drawn inwardly along the grooves (8) for distributive mixing. Modifications include plural-turn spiral, straight, and truncated spiral grooving (FIGS. 5 to 10), and batch mixing in which only one disc (28) rotates (FIG. 11). Continuous mixing involving shear is carried out within a cylindrical barrel (40 FIG. 12;57 FIG. 13) between its internal helical-grooving (43;590 and the helical grooving (44;60), of opposite hand, of a rotor (41;58). The shearing can produce mechanochemical reactions that break down the molecular structure of the material, notably in the context of mastication and solubilising of used rubber in reclaim from vehicle-tyres.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: November 2, 1999
    Inventor: William Ferguson Watson
  • Patent number: 5975449
    Abstract: An apparatus is provided for the pulverization of vulcanized rubber pea-size pellets. The apparatus consists of a barrel entrance, an extruder forcing section, a multiple rotor barrier section and an end discharge which presents the extrusion to a high speed wire brush-like member which shatters the extrusion into extreme small pieces. The hopper forcing section is provided with an extremely long hopper opening the design of which permits an insert which completes the barrel bore to 360 degrees. By adding inserts, the length of the forcing section is adjustable and adiabatic extrusion can be achieved. The now adjustable forcing section is followed by a section of rotor barriers, which consist of a wide top diagonal barrier crossing the extruder groove in a manner which requires all of the process material to pass through the clearance barrier top to barrel bore. The wide top barriers are provided with a set of circumferential grooves which start at capacity and end downstream at zero capacity.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: November 2, 1999
    Inventor: Paul Geyer
  • Patent number: 5927627
    Abstract: An improved continuous crumbing machine for recycling rubber tires and other materials such as polyethylene containers, gypsum, hardboard, tin cans, glass jars and bottles. The device comprises a pair of rotating rolls having negative rake teeth of interlocking sprocket design formed on the outer periphery of each roll. The materials to be fragmented or crumbed are fed between pairs of rotating rollers having negative rake teeth. A plurality of stages of rotating rollers are placed in series to obtain the desired particle size.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: July 27, 1999
    Assignee: Honey Creek Industries, Inc.
    Inventors: Gerald E. Edson, William F. Brown, Paul G. Thomson
  • Patent number: 5927620
    Abstract: An improved method for treating crumb rubber particles for use in asphalt compositions is characterized by activating the particles to enhance the rheological properties thereof. A slurry of crumb rubber particles is formed by adding water thereto. The slurry is heated to a temperature of 85-90.degree. C. to release excess oils and chemicals from the particles into the slurry. The slurry is dried to produce a fine mesh rubber product with enhanced rheological properties.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: July 27, 1999
    Assignee: Phaltech Corporation
    Inventor: Mohammed Memon
  • Patent number: 5924637
    Abstract: The tire shredder includes a frame, a conveyor assembly depending from the frame defining a feed path for the tires and debris from an input end to a discharge end, a carriage supported with respect to the conveyor assembly to have a reciprocating linear travel across the linear feed path at the discharge end, and a plurality of rotary cutting elements mounted on the carriage with axes of rotation parallel to the travel of the carriage. By providing a plurality of rotary cutting elements tires coming in a wide variety of sizes can be handled.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: July 20, 1999
    Inventor: Werner Niederholtmeyer
  • Patent number: 5921480
    Abstract: The present invention provides an industrial grinding machine and method of grinding by shredding between stationary cutters and rotating cutters placed within a plurality of cutting units, each cutting unit having a blunt stationary cutter and a blunt rotating cutter, which are spaced apart, without the use of sharpened knife blades.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: July 13, 1999
    Assignee: Grindtech Investments
    Inventor: Reiner Wenzel
  • Patent number: 5904305
    Abstract: A rubber reduction and recycling system with dramatically reduced power requirements. The present invention provides a series of reduction stations which successively reduce the size of the rubber, typically in the form of tires, to eventually result in crumb rubber. The power requirements are dramatically reduced by providing a fixed cutting plate through which the teeth of the cutting apparatus pass and cut the rubber in a shearing fashion. Moreover, the teeth of the cutting apparatus pass through the fixed cutting plate at an angular disposition so that at any given point, a relatively small portion of the rubber is being cut and thereby consuming power. Finally, the power consumption is reduced by providing the teeth on rotating shafts in a plurality of series of arcuate patterns. Therefore, at any given time, only a relatively small number of teeth in each series cut at the same time and thereby require power.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: May 18, 1999
    Inventor: Win F. Kaczmarek
  • Patent number: 5899130
    Abstract: Apparatus for compacting and for cutting voluminous objects of strong elasticity, notably pneumatics.The apparatus includes shears; positioned at the extremity of a tunnel of arranging and compacting, the tunnel has a rectangular cross section, narrowing toward the extremity and the four walls of the tunnel being constituted of parallel and juxtaposed rollers. The rollers are disposed transversely. The rollers of the vertical walls and of the horizontal superior wall being put into rotation by a motor apparatus.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: May 4, 1999
    Inventor: Hubert Chazelle
  • Patent number: 5894997
    Abstract: A machine for shredding a discarded tire is composed of a base, a vertical advancing seat, a horizontal advancing seat, a tire holding device, a transmission device, a tool set, and a computer control device. The vertical advancing seat is provided with a slide block capable of sliding along the vertical advancing seat in the vertical direction relative to the base. The horizontal advancing seat is mounted on the slide block of the vertical advancing seat and is provided with a slide block capable of sliding along the horizontal advancing seat in the horizontal direction relative to the base. The horizontal advancing seat is further provided with two sensors, whereas the slide block of the horizontal advancing seat is provided with two sensing blocks capable of cooperating with the sensors to execute the step-by-step shredding operation is conjunction with the tool set and the computer control device.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: April 20, 1999
    Inventor: ping lu Chen
  • Patent number: 5868328
    Abstract: A wheel crushing apparatus for crushing scrap vehicle wheels to prepare the scrap wheels for recycling, the scrap wheels having a tire mounted on the wheel, consists of an engine, a hydraulic pump driven by the engine, a single hydraulic cylinder and piston driven by the hydraulic pump, a crushing head to hold the wheel and tire for crushing the wheel, a number of crushing arms concentric about the crushing head, and radially movable between an extended position wherein the crushing arms contact the tire tread and a contracted position wherein the wheel is crushed, and a linkage connecting all of the crushing arms to the single hydraulic piston, so that all of the crushing arms are driven by the single hydraulic piston between the extended position and the contracted position.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: February 9, 1999
    Assignee: Design Pro of Duluth, Inc.
    Inventor: Eugene H. Luoma
  • Patent number: 5865009
    Abstract: A new rubber expansion joint for preventing distortions, cracks, and breaks in building materials normally caused by thermal movement. The invention includes a method of making an expansion joint member from used tires and using the resulting expansion joint member by installing it into a structure to create an expansion joint.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: February 2, 1999
    Inventors: Johnnie Jackson, Willie Mae Jackson
  • Patent number: 5836524
    Abstract: A one-step thermal treatment process for liquefaction of solid wastes selected from the group consisting of printed circuit board wastes, plastic wastes, rubber wastes, scrap fires, used cables/wires, auto shredder residues, contaminated soils, and waste lubricating oils to recover valuable oil products. Apparatus is provided and includes a means for continuous feeding, an inclined screw liquefaction reactor(ISLR), and means for handling oils and gas products. Wastes are liquefied in used lubricating oils or recycled heavy oil product at relatively low temperatures, and the unliquefied inorganic materials are recovered.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: November 17, 1998
    Assignee: National Science Council
    Inventor: Hong-Paul Wang
  • Patent number: 5829690
    Abstract: A shredding apparatus includes a rotor having rows of tines projecting generally radially outwardly therefrom, and also a housing surrounding the rotor having rows of tines projecting generally radially inwardly therefrom. The rotor tines and stator tines have staggered positions, with one or more of the rotor tines passing between adjacent stator tines. Material inserted into an inlet at the top of the housing is caught by the rotor tines and pulled past the first row of stator tines. That first row has fewer tines than does each row of tines on the rotor, whereas the final row has the same number of tines as each row on the rotor. The opposing faces of the tines on the rotor and stator are flat, with a small clearance between passing tines, of typically about 1/8 of an inch. The passing flat faces on the tines are at a slight angle to each other, the outer ends of rotor tines passing stator tines ahead of the inner ends in a scissors-like fashion.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: November 3, 1998
    Assignee: Sudrohrbau GmbH & Co.
    Inventor: Maurice Deschamps
  • Patent number: 5799880
    Abstract: An apparatus for devulcanizing vulcanized rubber or crosslinked polymeric material has an ultrasonic exposure portion including a body forming an exposure channel through which particles of the material flow and an ultrasonic generator including a horn extending generally transverse to the direction of the material flow. The apparatus also has a preconditioning portion for feeding the particles to the ultrasonic exposure channel. The method for devulcanizing vulcanized rubber or crosslinked polymeric material comprises the steps of preconditioning and feeding particles of the material, including heating the particles; feeding the particles through a pressurized exposure channel; and exposing the particles to ultrasonic energy within the exposure channel with an ultrasonic wave propagated in a direction transverse to the direction of the channel to effect devulcanization by breaking chemical bonds in the material.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: September 1, 1998
    Assignee: Ultramer, Inc.
    Inventors: Paul R. Roberson, Tim M. Boron
  • Patent number: 5794861
    Abstract: Methods and equipment are described for the recycling of pieces of pre-fragmented scrap tires using high pressure water jets. The use of high pressure water provides for the production of fragmented rubber material in useful sizes and also provides for a separation of the fragmented rubber from the cording and bead material of the pieces of pre-fragmented tires. Recovery of metal cording material in a form suitable for reuse is also one feature of the present invention.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: August 18, 1998
    Assignee: D & R Recyclers, Inc.
    Inventor: Darrel Rutherford, Sr.
  • Patent number: 5785263
    Abstract: A waste tire pulverizing and separation machine including a machine body, and a roll-in mechanism, a pulverizing barrel, and a separation conveyer accommodated in the machine body. The roll-in mechanism is mounted at an input side at an upper side of the machine body and is comprised of an upper roller assembly and a lower roller assembly. Each roller assembly comprises a plurality of rollers arranged in a row. Each roller is provided with ratchet wheels and are driven to synchronously rotate by a motor via chains. The pulverizing barrel is mounted at a rear side of an output end of the roll-in mechanism. A circumferential surface of the pulverizing barrel is provided with a plurality of alternately arranged cutters. A curved sieve is located below the pulverizing barrel. The separation conveyer is disposed below the pulverizing barrel and comprised of a plurality of rollers mounted between two frames. An output roller at an output end of the separation conveyer is provided with a magnetic tape.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: July 28, 1998
    Inventors: Chun-Feng Wu, Shih-Hsu Wu
  • Patent number: 5782417
    Abstract: The tire shredder has a frame supporting two parallel, vertically spaced rails on which are mounted a wheeled carriage. A variable speed, bi-directional motor provides reciprocating movement of the wheeled carriage on the tracks. The wheeled carriage supports a cutting assembly which includes a drive motor, a shaft and a plurality of circular saws mounted on the shaft for rotation with the shaft. The shaft is mounted with its axis of rotation parallel to the direction of movement of the carriage. Tires are fed to the circular saws by a conveyer system. A bottom conveyer carries the tires substantially parallel to the floor. A top conveyor, is positioned above the first conveyer, slanting downwardly toward the bottom conveyor from the opening for the tires to the discharge point adjacent the saws. Both conveyers are driven by a variable speed motor.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: July 21, 1998
    Inventor: Werner Niederholtmeyer
  • Patent number: 5755388
    Abstract: A waste tire treating apparatus is disclosed. It includes a grinding device for grinding the waste tire into blocks with smaller volume, a washing device for washing the ground waste tire, a drying device for drying the washed waste tire, a granulating device for cutting and granulating the dried waste tire into granules with predetermined volume, a heating device for heating and melting the waste tire granules and a sorting device disposed under the heating device for receiving the molten rubber and nylon fibers and the steel filaments of the waste tire. The sorting device includes a channel with circulated water flow, whereby the mixture of the rubber and nylon fibers float on the water, while the steel filaments precipitate onto the bottom of the channel to be separately recovered.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: May 26, 1998
    Inventors: Chin-Ching Yen, Chih-Ming Lee
  • Patent number: 5735471
    Abstract: The present invention relates to a method for disintegration of thermoplastic elastomeric materials containing fibres, wires or the like. This method comprises the following two steps: subjecting segments of the elastomeric materials to temperatures able to bring the segments into a brittle glass-like state (by means of a freezing chamber), and gradual disintegrating of the frozen segments by disintegrating means provided to separate the segments from the wires and fibres. This disintegration is effected by means of a bending force applied to the frozen segments causing them to break into small particles while the wires and fibres remain substantially intact. After the disintegration, separation of the small particles, wires and fibres takes place by separating means.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: April 7, 1998
    Inventor: Louis Muro
  • Patent number: 5695131
    Abstract: A device and method for both liberating rubber from other parts of a tire, and cutting the rubber and other parts to an appropriate size for recycling.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: December 9, 1997
    Assignee: B & W, Inc.
    Inventor: Reiner Wenzel
  • Patent number: 5683038
    Abstract: A tire dissection method and apparatus to separate the rubber and steel components in a tire by using a high pressure fluid. The high pressure fluid removes the rubber liner and excises the steel bead bundle in a tire. The steel components in the tire may be stressed to move away from the rubber components prior to application of the high pressure fluid. The process yields four distinct products from a vehicle tire: crumb rubber, chunk rubber, high tensile steel, and plated steel. The process is easy to use, reliable, and portable. The rubber liner can be softened prior to processing by the high pressure fluid to improve the efficiency of the process.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: November 4, 1997
    Inventor: Thomas J. Shinal
  • Patent number: 5676320
    Abstract: A motor truck for use in collecting and processing solid waste material such as scrap tires. The truck includes a chassis including a cab; a body structure positioned on the chassis behind the cab and defining a storage chamber; a shredder mounted on top of the body structure forwardly of the storage chamber; a compactor positioned within the body structure beneath the shredder and forwardly of the storage chamber; and a conveyor system for conveying tires from a curbside location upwardly for discharge downwardly into the open upper end of the shredder. The shredded tires are discharged downwardly into the body structure rearwardly of the compactor, whereafter the compactor is actuated to stroke rearwardly and compress the tire shreds into the storage chamber.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: October 14, 1997
    Assignee: Royal Recovery Systems, Inc.
    Inventor: Paul Merklinger
  • Patent number: 5669562
    Abstract: A conveyor system particularly adapted for feeding vehicle tires to a shredder mechanism includes telescopic conveyor sections supported to removably, adjustably position an outlet end of a first conveyor section relative to an inlet opening of the shredder mechanism and to adjustably position an inlet end of a second conveyor section at a convenient elevation for tire loading purposes.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: September 23, 1997
    Assignee: Columbus McKinnon Corporation
    Inventor: Mark A. Smith
  • Patent number: 5634599
    Abstract: The invention relates to process for recycling tires and other recyclable materials. The process includes a series of steps designed to reduce a rubber or polymer tire into pulverized material. The process involves first shredding the tires or recyclable material into chips. The chips are then cooled to cryogenic temperatures at which said pieces become brittle. The brittle pieces are then pulverized in the second step. Pulverized material is then screened, removing large chunks of rubber or polymer from the mixture. Finally, the remaining fiber and magnetic material is separated out of the pulverized material, through the use of a magnetic separator and a vibrational (fiber) separator.
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: June 3, 1997
    Assignee: Crumbrubber Technology Co., Inc.
    Inventors: Iosif Khais, Angelo Reali, Michael Reali, Igor Reznik
  • Patent number: 5630554
    Abstract: To insure that rejects or scraps of composite materials such as printed wiring boards that consist of the mixture of metal and non-metal parts are separated into the metal and non-metal components with good precision so that both components can be recovered as recyclable valuables, the composite materials are broken into pieces by means of a shearing machine or the like and the pieces are thereafter ground with a hammer mill or the like to form a mixed powder consisting of metal and non-metal particles, which mixed powder is then fed continuously on to a belt conveyor inclined at an angle with respect to a line perpendicular to the direction of travel, whereby the metal particles are efficiently separated from the non-metal particles; the recovered metal particles being fed to an electrostatic separator to obtain higher grade of concentration by removing the non-metal inclusions.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: May 20, 1997
    Assignees: Dowa Mining Co., Ltd., Jiro Hiraishi
    Inventors: Chiaki Izumikawa, Hiroyuki Iwata, Shigehisa Endoh, Hitoshi Ohya
  • Patent number: 5611492
    Abstract: The invention provides an apparatus and method for grinding and separating pre-softened refuse tire portions. The pre-softened portions are compaction ground with tapered auger positioned in a housing. The ground material which is discharged from the housing is thereafter magnetically separated into a metal refuse fraction and a rubber crumb product fraction. Optionally a second stage apparatus is provided. The second stage apparatus differs from the apparatus substantially only in respect to further comprising a second housing for enclosing said second auger which has rifling on the inner surface thereof and which runs counter to the flights of said second auger; and means for rotating said second housing counter to said second auger. Crumb rubber product from the apparatus is fed into the inlet of the second stage. A 200 mesh crumb rubber is thereafter recovered from the outlet of the second stage.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: March 18, 1997
    Assignee: Hunt Industries Inc.
    Inventors: James R. Hunt, Jerry L. Hunt
  • Patent number: 5601240
    Abstract: A motor truck for use in collecting and processing solid waste material such as scrap tires. The truck includes a chassis including a cab; a body structure positioned on the chassis behind the cab and defining a storage chamber; a shredder mounted on top of the body structure forwardly of the storage chamber; a compactor positioned within the body structure beneath the shredder and forwardly of the storage chamber; and a conveyor system for conveying tires from a curbside location upwardly for discharge downwardly into the open upper end of the shredder. The shredded tires are discharged downwardly into the body structure rearwardly of the compactor, whereafter the compactor is actuated to stroke rearwardly and compress the tire shreds into the storage chamber.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: February 11, 1997
    Assignee: Royal Recovery Systems, Inc.
    Inventors: Paul Merklinger, Bruce Brewer
  • Patent number: 5590838
    Abstract: Apparatus for reducing to particles tread portions and beaded side wall portions of vehicle tires, particularly extra large vehicle tires, or for preparing such vehicle tires for recapping, comprises a tire holder assembly, having a paired set of dual jacks carried by opposite ends, respectively, of elongate, rigid, tire clamping frames, and a rotary, cutter blade assembly made up of a side-by-side series of disks carrying cutter blades of chisel type offset from one another to provide a helically oriented series of such cutting blades. Opposite side and end members of each of the frames provide for clamping corresponding side wall beads of a received tire, while opposite ends of opposite end members of the respective frames, usually clamping corners thereof, span respective chords of the circumferences of corresponding beads of the tire.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: January 7, 1997
    Assignee: Garb Oil & Power Corporation
    Inventor: John C. Brewer
  • Patent number: 5588600
    Abstract: A process for recovering crumb rubber from used vehicle tires wherein the tires are comminuted in three comminuting operations, the second and third of which are prefaced by contact with a liquid cryogenic. The cryogenic liquid which is gassified upon contact with the tire particles, is reliquefied and recycled.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 31, 1996
    Inventors: Kenneth F. Perfido, Anthony M. Cialone
  • Patent number: 5564634
    Abstract: A comminuting apparatus for rubber has two vertically mounted opposing facing grinding stones of large size having hollow centers. Interposed between these two stones, both of which, as stators, are fixed and do not rotate, is a single rotor having double-sided opposed abrasive grinding stone faces, mounted for rotation but floating laterally or horizontally in position between the two opposed fixed stones. The spacing between the opposed sets of grinding stones is set by increasing or decreasing the spacing between the outer most stator and the fixed inner stator. So long as the rotor rotates for grinding, the floating center stones will position themselves equally between the two stators so as to equalize the dynamic slurry pressure imposed during the grinding process upon the faces of the stones.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: October 15, 1996
    Inventors: Michael W. Rouse, Morgan White
  • Patent number: 5562255
    Abstract: A tire-shearing machine capable of varying the size of tire chunks segmented. A primary shear segments a tire, along a longitudinal axis, into a plurality of longitudinal strips and feeds the strips into a secondary shear. The secondary shear segments, along an axis perpendicular to the longitudinal axis, each of the longitudinal strips into a plurality of chunks. The speed of each of the shears is controlled independently of the other, and on-the-fly, to allow producing tire chunks to a desired size.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: October 8, 1996
    Inventors: Zbigniew J. Witko, Antonio L. A. Reis
  • Patent number: 5551325
    Abstract: A machine for cutting used tires into selectively sized pieces or segments which includes a cutter which is movable relative to a die against which a tire is supported. An indexing mechanism is engaged with the tire to rotate the tire relative to the die after each successive cutting motion of the cutter so that contiguous and/or adjacent segments or portions of the tire are progressively severed from the middle reinforced inner bead of the tire.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: September 3, 1996
    Inventor: Donald Schutt
  • Patent number: 5527409
    Abstract: An inexpensive, durable, and easily applied roofing material for commercial establishments prepared from waste and used tires, wherein the tires are shredded into small particle size, and thence uniquely compacted into large log-like article of substantial size and weight, as on the order of 2,000 pound and four feet in length. The logs are cut in a peeling manner to form wound up rolls of thin rubber tire sheeting, which are then cut and laid as roofing. Sealant applied over the roofing ensures waterproofing, enhances ultraviolet ray protection, adds to overall fire resistance, and helps to prevent leakage at the sheeting joints.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: June 18, 1996
    Inventor: Robert R. Lanphier
  • Patent number: 5524838
    Abstract: A method and apparatus for separating and recovering rubber, fiber, and steel from tires cryogenically cools and grinds tire rubber. The method reduces by 45 to 60 percent the amount of nitrogen required to cool and embrittle the rubber prior to being ground. Only the surface of the rubber is embrittled prior to grinding.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: June 11, 1996
    Inventors: H. John Ellers, Milton M. Masson
  • Patent number: 5522559
    Abstract: A rubber crumbing apparatus and method for making crumb rubber from tire chips is disclosed. The rubber crumbing apparatus comprises a frame assembly, a first cone assembly including a truncated cone having an interior surface and an opening extending therethrough, and a second cone assembly positioned substantially within the first cone assembly. The second cone assembly includes a truncated cone having an exterior surface in opposing relationship to interior surface of the first truncated cone. The second cone assembly rotates relative to the first cone assembly. A plurality of crumber blades are connected to one of the opposing surfaces and a plurality of beads are attached to the other opposing surface of the truncated cones. The crumber blades are in close proximity to said beads without contacting said beads as the second cone assembly rotates relative to the first cone assembly. Tire chips are fed between the truncated cones.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: June 4, 1996
    Assignee: Hahn & Clay
    Inventor: Donald H. Bredbeck
  • Patent number: 5507127
    Abstract: A concrete building block for erecting a wall and/or disposing of used rubber tires and other waste material detrimental to the environment. The block is made up of three rectangular portions, and includes a central chamber in which a bale of used rubber tires is encased. The tongue-and-groove design of the block facilitates the construction of a strong wall by joining the blocks end-to-end, with the tongue of one block disposed in the groove of another.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: April 16, 1996
    Inventor: Raymond H. Gates
  • Patent number: 5482215
    Abstract: A method of reclaiming rubber from vehicle tyres that enables the high grade rubber in the tread portion of the tire to be collected separate from the lower grade rubber in the sidewalls and other areas of the tire. The method comprising separating the complete tread portion from the remainder of the tire and then removing from that tread portion the high grade tread rubber. Thereafter the remainder of the tread portion and the sidewall and bead portion of the tire are each treated to separate the rubber from metallic and fabric reinforcement materials therein. The high quality tread rubber and lower grade other rubber are both removed in a particulate form.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: January 9, 1996
    Assignee: CMHT Technology (Australia) Pty Ltd
    Inventor: George Veres
  • Patent number: 5452860
    Abstract: An apparatus for reducing and separating a mixed makeup of material in which a principal mill for grinding, ripping and tearing the subject material is provided with a magnetic separator for extracting the magnetic fractions from the non-magnetic fractions and separately discharging the magnetic fractions which are separately collected from the non-magnetic material. The apparatus may employ a preliminary material reducing unit to reduce the material to a suitable size for processing in the principal mill, as this feature is useful to reduce such bulky material as vehicle tires which are the usual source of magnetic material that needs to be separated out.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: September 26, 1995
    Inventor: Robert M. Williams
  • Patent number: 5443567
    Abstract: The present invention relates to a method and apparatus for shredding annular objects, preferably the carcasses of discarded tires, into multiple uniformly shaped pieces. More specifically, the present invention includes a novel multi-stage apparatus which automatically divides tire carcasses into two side wall sections and a tread section. The apparatus then further divides the wall and tread sections into multiple relatively small, uniform pieces. The pieces so formed are suitable for a variety of purposes, including recycling.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: August 22, 1995
    Inventor: Kearney L. Pruett
  • Patent number: 5411215
    Abstract: An extremely efficient reduction of ten mesh feedstock to minus 80 mesh fine elastomeric rubber product may be obtained by interconnecting two sequential grinding mills. The first mill is fed a feedstock slurry reaching ten mesh particle elastomers in a transport fluid such as water. This mill is set to produce a minus 30 to 40 mesh in a single pass, preferably by use of a relatively coarse grinding stone producing a relatively high through put. Water or transport fluid is then added to the thirty mesh output of the first state to bring it back to a transportable slurry which is then fed to a second grinding stage set to produce an average minus 80 mesh particle. This can be produced best by a finer grit grindstone and concomitant advantages will occur due to the uniformity of the feedstock and the lack of large particles in achieving a higher through put.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: May 2, 1995
    Inventor: Michael W. Rouse
  • Patent number: 5411216
    Abstract: Shredding machines and a process for recycling used vehicular tires comprising a primary shredder and process, a secondary shredder and process, a granulator and a first process, a material separating means and process, and a granulator and a second process. The primary shredder having parallel counter rotating shafts to which a plurality of cylindrical spur gear-shaped cutters with teeth are attached at proportional distances. The shafts are positioned relative to one another such that a cutter attached to the first shaft fits in the proportional space between two identical cutters on the second shaft. The edges of the top lands and bottom lands of each cutter tooth perform the cutting operation. Thus the power requirement of the primary shredder can be reduced by nearly 90%. The secondary shredder having a reel-type cutter known in the art. The granulator comprising an improved grinding machine with mating grinding discs with working surfaces separated by a controlled gap.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: May 2, 1995
    Inventor: Dennis O'Keefe
  • Patent number: 5395061
    Abstract: A motor truck for use in collecting and processing solid waste material such as scrap tires. The truck includes a chassis including a cab; a body structure positioned on the chassis behind the cab and defining a storage chamber; a shredder mounted on top of the body structure forwardly of the storage chamber; a compactor positioned within the body structure beneath the shredder and forwardly of the storage chamber; and a conveyor system for conveying tires from a curbside location upwardly for discharge downwardly into the open upper end of the shredder. The shredded tires are discharged downwardly into the body structure rearwardly of the compactor, whereafter the compactor is actuated to stroke rearwardly and compress the tire shreds into the storage chamber.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: March 7, 1995
    Assignee: Larisan Incorporated
    Inventor: Paul Merklinger