US3527414A - Method and apparatus for stripping the insulation from metallic wire - Google Patents

Method and apparatus for stripping the insulation from metallic wire Download PDF

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Publication number
US3527414A
US3527414A US3527414DA US3527414A US 3527414 A US3527414 A US 3527414A US 3527414D A US3527414D A US 3527414DA US 3527414 A US3527414 A US 3527414A
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Prior art keywords
insulation
staples
stripping
metallic wire
conveyor
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Expired - Lifetime
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John B Schorsch
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Union Corp USA
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Union Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B02C19/186—Use of cold or heat for disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0416—Cooling the plastics before disintegration, e.g. freezing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3462—Cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/707—Cables, i.e. two or more filaments combined together, e.g. ropes, cords, strings, yarns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/37—Cryogenic cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0405—With preparatory or simultaneous ancillary treatment of work
    • Y10T83/041—By heating or cooling
    • Y10T83/0414—At localized area [e.g., line of separation]

Definitions

  • ABSTRACT OF THE DISCLOSURE A low temperature refrigerating tank; means feeding insulated Wire staples into the tank to render the insulation brittle; crushing rolls for pulverizing the insulation, and a separating screen for separating the metallic from the insulation components.
  • the single figure is a diagrammatic side elevational view showing one method and one apparatus for carrying out the invention.
  • the apparatus illustrated includes a hopper for receiving a constant supply of insulated wire chopped into staples 12 of an inch or two in length, more, or less. From the hopper, the staples are delivered to a feed conveyor 14 by means of a valve or other control device.
  • Conveyor 14 drops the staples onto the slanted entering portion 16 of a conveyor 15, which includes a central submerged portion 18 and an exit portion 20.
  • This conveyor is preferably provided with flights 22 to prevent the staples from falling off conveyor portions 16 and 20.
  • the conveyor travels endlessly over rolls 24, 25, 26, and 27, one of which is driven by a motor in any conventional manner.
  • the upper run of the conveyor travels through a liquid, or gaseous, refrigerant 28, in a tank 30. In other words, in travelling from left to right, as viewed in FIG. 1, the conveyor moves through the refrigerant, and in moving from right to left, it travels outside of the tank.
  • the liquid refrigerant may be liquid CO glycol, alcohol, or glycerin, or any other fluid having a freezing point low enough to permit cooling the Patented Sept. 8, 1970 wire insulation to the point at which it becomes brittle. In practice, a temperature of between minus 20 C. and 195 C. below zero centigrade, is enough.
  • the liquid in the tank is kept cold by circulating it through a conventional evaporative coil or other cooling means.
  • I provide pump 32 which sucks liquid through pipe 34, and forces it through the cooling unit and through pipe 36, back into the tank.
  • the refrigerated staples are delivered to the nip of crusher rolls 38 which break the now, brittle insulation into pieces which are small enough to pass through screen 40.
  • the crushed insulation falls through the top run of the screen onto the bottom run thereof and then into a receptacle 42, and the bare staples of core material are propelled in the direction of the arrow.
  • a screen or other baflle 44 which is shown in phantom in the drawing can be used.
  • a method of continuously stripping insulation from an insulation-covered core which method includes the step of comminuting the insulation-covered core into staples of a predetermined length

Description

Sept. 8, 1970 scHo sc 3,527,414
METHOD AND APPARATUS FOR STRIPPING THE INSULATION FROM METALLIC WIRE Filed Nov. 14, 1967 REFRIGERATED ENCLOSURE COOLING UNIT INVENTOR JOHN B. SCHORSCH zzww ATTORNEY United States Patent 3,527,414 METHOD AND APPARATUS FOR STRIPPING THE INSULATION FROM METALLIC WIRE John B. Schorsch, Rydal, Pa., assignor to The Union Corporation, Verona, Pa., a corporation of New Jersey Filed Nov. 14, 1967, Ser. No. 682,826 Int. Cl. B02c 11/08 U.S. Cl. 241-23 2 Claims ABSTRACT OF THE DISCLOSURE A low temperature refrigerating tank; means feeding insulated Wire staples into the tank to render the insulation brittle; crushing rolls for pulverizing the insulation, and a separating screen for separating the metallic from the insulation components.
THE INVENTION The ever-increasing use of insulated wire, and the progressive depletion of natural resources, has made reclamation of the metallic content of insulated wiring mandatory. To this end, it has been proposed to burn off the insulation. This method works, but the resulting airpollution creates a serious problem. It also has been proposed to subject the insulated wire to a heat sufiicient to soften it, for removal. For obvious reasons, this method was found to be not practical. Other, even less practical, expedients have been tried.
According to my invention, I subject the insulation wire to a temperature low enough to render the insulation brittle, and I subject the refrigerated wire to the action of crushing rolls which break the insulation into pieces small enough to pass through the openings of a separating screen which deposits the stripped wire onto a conveyor for removal.
In the drawings, the single figure is a diagrammatic side elevational view showing one method and one apparatus for carrying out the invention.
The apparatus illustrated includes a hopper for receiving a constant supply of insulated wire chopped into staples 12 of an inch or two in length, more, or less. From the hopper, the staples are delivered to a feed conveyor 14 by means of a valve or other control device.
Conveyor 14 drops the staples onto the slanted entering portion 16 of a conveyor 15, which includes a central submerged portion 18 and an exit portion 20. This conveyor is preferably provided with flights 22 to prevent the staples from falling off conveyor portions 16 and 20. The conveyor travels endlessly over rolls 24, 25, 26, and 27, one of which is driven by a motor in any conventional manner. The upper run of the conveyor travels through a liquid, or gaseous, refrigerant 28, in a tank 30. In other words, in travelling from left to right, as viewed in FIG. 1, the conveyor moves through the refrigerant, and in moving from right to left, it travels outside of the tank. The liquid refrigerant may be liquid CO glycol, alcohol, or glycerin, or any other fluid having a freezing point low enough to permit cooling the Patented Sept. 8, 1970 wire insulation to the point at which it becomes brittle. In practice, a temperature of between minus 20 C. and 195 C. below zero centigrade, is enough.
The liquid in the tank is kept cold by circulating it through a conventional evaporative coil or other cooling means. To this end, I provide pump 32 which sucks liquid through pipe 34, and forces it through the cooling unit and through pipe 36, back into the tank.
The refrigerated staples are delivered to the nip of crusher rolls 38 which break the now, brittle insulation into pieces which are small enough to pass through screen 40. A screen having holes of the order of one-quarter of one inch, more or less, will do, but it will be appreciated that this is a matter of choice which is influenced by the fragmentation of the insulation and by the length of the staples and by the thickness of the metallic components. In any event, the crushed insulation falls through the top run of the screen onto the bottom run thereof and then into a receptacle 42, and the bare staples of core material are propelled in the direction of the arrow.
If the staples exhibit a tendency to float, a screen or other baflle 44 which is shown in phantom in the drawing can be used.
While the apparatus described is operative, it is within the scope of the invention to refrigerate the grinding rolls in any well known manner, such as by contact with evaporative coils or by placing the grinder, or the entire apparatus in a cooled enclosure such as a walk-in refrigerator or the like.
What I claim is:
1. A method of continuously stripping insulation from an insulation-covered core, which method includes the step of comminuting the insulation-covered core into staples of a predetermined length,
the step of propelling the staples through a refrigerated fluid to render the insulation brittle,
the step of passing the staples between grinding rolls to fragment the embrittled insulation,
the step of separating the fragmented insulation from the core staples, and refrigerating said fluid.
2. The method defined in claim 1 wherein, at least the grinding mechanism is refrigerated.
References Cited UNITED STATES PATENTS 1,129,142 2/ 1915 Torrance et a1. 241-66 1,978,204 10/1934 Hurt 241-23 2,059,970 11/1936 Robillard 241- 2,225,797 12/1940 Plauson 241-66 2,854,360 9/1958 Pajes 134-17 2,956,717 10/1960 Scharf 225-1 2,977,255 3/ 1961 Lowry 241-17 3,101,757 8/1963 Hanson 81-951 3,160,993 12/ 1964 McCormick 51-314 GERALD A. DOST, Primary Examiner US. Cl. X.R.
US3527414D 1967-11-14 1967-11-14 Method and apparatus for stripping the insulation from metallic wire Expired - Lifetime US3527414A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647149A (en) * 1969-05-12 1972-03-07 Sasebo Heavy Ind Co Ltd Apparatus for the separation of wire and its insulating material and recovering these as raw materials
US3666185A (en) * 1971-02-17 1972-05-30 Virgil C Williams Cryogenic crushing of materials
US3718284A (en) * 1971-04-26 1973-02-27 V Richardson Method of and apparatus for communiting rubber tires
US3768739A (en) * 1968-07-25 1973-10-30 R George Apparatus for fragmenting scrap metal
FR2193707A1 (en) * 1972-07-24 1974-02-22 Inst Sekundarrohstoffwirtsch Recycling high polymer waste - using cryogenic technique to render waste material brittle
JPS4927884A (en) * 1972-07-10 1974-03-12
US3837815A (en) * 1973-03-29 1974-09-24 Dick Co Ab Method of reclaiming selenium and metal base from electrophotographic plates
JPS511314B1 (en) * 1970-12-29 1976-01-16
US3960329A (en) * 1974-01-03 1976-06-01 Aagaard Karl Method and apparatus for purifying and separating bee glue
US4020992A (en) * 1975-11-20 1977-05-03 Aluminum Company Of America Separation of joined plastic and metal components
US4043019A (en) * 1973-09-19 1977-08-23 Vereinigte Aluminium-Werke Aktiengesellschaft Method and arrangement for separating the material forming one part of an article from that forming another part thereof, particularly for use with metal-synthetic resin composites
US4073443A (en) * 1976-02-16 1978-02-14 Italo Danioni S.D.F. Comminuting plant at cryogenic temperatures
US4179903A (en) * 1977-12-22 1979-12-25 General Signal Corporation Preparing insulated wire for cutting and stripping
WO1980000140A1 (en) * 1978-06-26 1980-02-07 Airmac Cryogenic Mach Deflashing apparatus
US4409034A (en) * 1981-11-24 1983-10-11 Mobile Companies, Inc. Cryogenic cleaning process
US4491484A (en) * 1981-11-24 1985-01-01 Mobile Companies, Inc. Cryogenic cleaning process
FR2561814A1 (en) * 1984-03-22 1985-09-27 Texeco Spa METHOD FOR SELECTIVELY RECOVERING CONSTITUENT MATERIALS FROM ISOLATED ELECTRIC CABLES WASTE
US4589203A (en) * 1983-08-26 1986-05-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and apparatus for the cryogenic stripping of electric cables
US4846408A (en) * 1988-01-21 1989-07-11 Gentex Corporation Method for making a friction material
US5368240A (en) * 1990-10-23 1994-11-29 Ubd Patent - Und Lizenzverwaltungsgesellschaft Apparatus for reducing rubber to particles
WO2003039414A1 (en) * 2001-11-05 2003-05-15 Wieslaw Brojek Method and the device for cryogenic therapy applied on the whole body of the patient
US20040206396A1 (en) * 2002-07-24 2004-10-21 Peter Behrends Valve, use of said valve, system comprising said valve and method for determining the condition of said system
WO2005068920A1 (en) * 2003-12-29 2005-07-28 Supercool Llc System and method for cryogenic cooling using liquefied natural gas
US20090179094A1 (en) * 2008-01-10 2009-07-16 Imperial Technologies, Inc. Materials crusher and bottom dump feeder

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1129142A (en) * 1913-06-20 1915-02-23 Thomas Torrance Paint-mill or mill to take a fluid.
US1978204A (en) * 1934-05-16 1934-10-23 Roy J Hurt Process of separating rubber from metal in a composite article
US2059970A (en) * 1935-02-09 1936-11-03 Gen Motors Corp Refrigerating apparatus
US2225797A (en) * 1937-12-17 1940-12-24 Plauson Hermann Colloidal mill
US2854360A (en) * 1955-12-05 1958-09-30 Pajes Wolf Szmul Removal of coatings
US2956717A (en) * 1958-09-26 1960-10-18 Jennings Machine Corp Wire stripping methods and apparatus
US2977255A (en) * 1955-01-24 1961-03-28 Kaiser Aluminium Chem Corp Reclamation method
US3101757A (en) * 1961-04-24 1963-08-27 Thomas P Hanson Apparatus and method of debarking pulp wood utilizing liquified gasses
US3160993A (en) * 1963-08-05 1964-12-15 Pangborn Corp Method and apparatus for deflashing molded resilient pieces

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1129142A (en) * 1913-06-20 1915-02-23 Thomas Torrance Paint-mill or mill to take a fluid.
US1978204A (en) * 1934-05-16 1934-10-23 Roy J Hurt Process of separating rubber from metal in a composite article
US2059970A (en) * 1935-02-09 1936-11-03 Gen Motors Corp Refrigerating apparatus
US2225797A (en) * 1937-12-17 1940-12-24 Plauson Hermann Colloidal mill
US2977255A (en) * 1955-01-24 1961-03-28 Kaiser Aluminium Chem Corp Reclamation method
US2854360A (en) * 1955-12-05 1958-09-30 Pajes Wolf Szmul Removal of coatings
US2956717A (en) * 1958-09-26 1960-10-18 Jennings Machine Corp Wire stripping methods and apparatus
US3101757A (en) * 1961-04-24 1963-08-27 Thomas P Hanson Apparatus and method of debarking pulp wood utilizing liquified gasses
US3160993A (en) * 1963-08-05 1964-12-15 Pangborn Corp Method and apparatus for deflashing molded resilient pieces

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768739A (en) * 1968-07-25 1973-10-30 R George Apparatus for fragmenting scrap metal
US3647149A (en) * 1969-05-12 1972-03-07 Sasebo Heavy Ind Co Ltd Apparatus for the separation of wire and its insulating material and recovering these as raw materials
JPS511314B1 (en) * 1970-12-29 1976-01-16
US3666185A (en) * 1971-02-17 1972-05-30 Virgil C Williams Cryogenic crushing of materials
US3718284A (en) * 1971-04-26 1973-02-27 V Richardson Method of and apparatus for communiting rubber tires
JPS4927884A (en) * 1972-07-10 1974-03-12
FR2193707A1 (en) * 1972-07-24 1974-02-22 Inst Sekundarrohstoffwirtsch Recycling high polymer waste - using cryogenic technique to render waste material brittle
US3837815A (en) * 1973-03-29 1974-09-24 Dick Co Ab Method of reclaiming selenium and metal base from electrophotographic plates
US4043019A (en) * 1973-09-19 1977-08-23 Vereinigte Aluminium-Werke Aktiengesellschaft Method and arrangement for separating the material forming one part of an article from that forming another part thereof, particularly for use with metal-synthetic resin composites
US3960329A (en) * 1974-01-03 1976-06-01 Aagaard Karl Method and apparatus for purifying and separating bee glue
US4020992A (en) * 1975-11-20 1977-05-03 Aluminum Company Of America Separation of joined plastic and metal components
US4073443A (en) * 1976-02-16 1978-02-14 Italo Danioni S.D.F. Comminuting plant at cryogenic temperatures
US4179903A (en) * 1977-12-22 1979-12-25 General Signal Corporation Preparing insulated wire for cutting and stripping
WO1980000140A1 (en) * 1978-06-26 1980-02-07 Airmac Cryogenic Mach Deflashing apparatus
US4409034A (en) * 1981-11-24 1983-10-11 Mobile Companies, Inc. Cryogenic cleaning process
US4491484A (en) * 1981-11-24 1985-01-01 Mobile Companies, Inc. Cryogenic cleaning process
US4589203A (en) * 1983-08-26 1986-05-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and apparatus for the cryogenic stripping of electric cables
FR2561814A1 (en) * 1984-03-22 1985-09-27 Texeco Spa METHOD FOR SELECTIVELY RECOVERING CONSTITUENT MATERIALS FROM ISOLATED ELECTRIC CABLES WASTE
US4596603A (en) * 1984-03-22 1986-06-24 Texeco S.P.A. Method for the selective recovery of constituent materials from insulated-electrical-cable wastes
US4846408A (en) * 1988-01-21 1989-07-11 Gentex Corporation Method for making a friction material
US5368240A (en) * 1990-10-23 1994-11-29 Ubd Patent - Und Lizenzverwaltungsgesellschaft Apparatus for reducing rubber to particles
US8162930B2 (en) 2001-11-05 2012-04-24 Metrum Cryoflex Spolka Z Organiczona Odpowiedzialnoscia, Sp. K. Method and the device for cryogenic therapy applied on the whole body of a patient
WO2003039414A1 (en) * 2001-11-05 2003-05-15 Wieslaw Brojek Method and the device for cryogenic therapy applied on the whole body of the patient
US7244269B2 (en) 2001-11-05 2007-07-17 Wieslaw Brojek Method and the device for cryogenic therapy applied on the whole body of a patient
US20070293920A1 (en) * 2001-11-05 2007-12-20 Wieslaw Brojek Method and the device for cryogenic therapy applied on the whole body of a patient
US20040206396A1 (en) * 2002-07-24 2004-10-21 Peter Behrends Valve, use of said valve, system comprising said valve and method for determining the condition of said system
WO2005068920A1 (en) * 2003-12-29 2005-07-28 Supercool Llc System and method for cryogenic cooling using liquefied natural gas
US7886997B2 (en) * 2008-01-10 2011-02-15 Imperial Technologies, Inc. Materials crusher and bottom dump feeder
US20110114767A1 (en) * 2008-01-10 2011-05-19 Imperial Technologies, Inc. Method of using a materials crusher and bottom dump feeder
US8109453B2 (en) 2008-01-10 2012-02-07 Imperial Technologies, Inc. Method of using a materials crusher and bottom dump feeder
US20090179094A1 (en) * 2008-01-10 2009-07-16 Imperial Technologies, Inc. Materials crusher and bottom dump feeder

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