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| Number | Title | Issue Date |
| 7195479 | Hot liner insertion/removal fixture A fixture (30) adapted to permit the heated exchange of a liner (14) from an operating vertical furnace (10). The fixture is adapted to secure to the base of the liner (14) to both unlock and lower the heated liner, such as a silicon carb... | 03/27/2007 |
| 6996153 | Core-type furnace Vertical segments of a side wall of a crucible for an induction furnace are assembled at an adjustable, invariable position by screws screwed into tapped holes of a flange common to all segments. A precise assembly is thus obtained producing no deformation and no in... | 02/07/2006 |
| 6501784 | Thermal insulation to be inserted between two insulating structures Disclosed is a thermal insulation to be inserted between two structures, surfaces, walls or the walls of components which are to be insulated. The thermal insulation consists of an plurality of hollow spheres made up by loose hollow spheres or by hollow s... | 12/31/2002 |
| 6214286 | Hybrid induction skull melting A solid charge of metal or alloy is placing in a crucible melting chamber defined by a monolithic refractory tubular sleeve disposed on a water cooled metallic base, an energizing induction coil disposed about the sleeve to inductively heat the solid char... | 04/10/2001 |
| 5902509 | Method and apparatus for inductively heating a refractory shaped member A method and an apparatus for inductively heating a refractory shaped member provided with an internal space, particularly for a metallurgical vessel, enable as rapid, uniform heating of the shaped member as possible. An inner inductor is introduced into ... | 05/11/1999 |
| 5901170 | Induction furnace An induction furnace apparatus and method for reducing the magnetic field produced by the operation of the furnace. The induction furnace including a refractory vessel, an induction coil, and an outer shell having a layer of metallic and magnetically perm... | 05/04/1999 |
| 5896410 | Compact furnace design A high temperature furnace formed from a stack of ceramic fiber--toroidal discs each fabricated to have an upper and lower groove for accommodating a heating coil so as to permit thermal elongation without buckling. The stacked array form a hollow cylindr... | 04/20/1999 |
| 5889813 | Levitation melting furnace A cooling water conduit extending through a segment of a crucible is curved inward in the portion around a molten metal tapping hole.... | 03/30/1999 |
| 5588019 | High performance induction melting coil An improved induction melting coil apparatus encapsulated with homogeneous inserts for controlling the direction of inductor flux density is disclosed. The inserts are relatively thick and rigid members which provide a low reluctance path within which the... | 12/24/1996 |
| 5495495 | Dense lining for coreless induction furnace This invention relates to a refractory lining for use in a coreless induction furnace having a refractory crucible, wherein the refractory lining lines the inner surface of the refractory crucible and has a porosity of between 0.2% and 1%.... | 02/27/1996 |
| 5418811 | High performance induction melting coil An improved induction melting coil apparatus encapsulated with homogeneous inserts for controlling the direction of inductor flux density is disclosed. The inserts are relatively thick and rigid members which provide a low reluctance path within which the... | 05/23/1995 |
| 5416795 | Quick change crucible for vacuum melting furnace A crucible assembly for use in induction melting furnaces utilizes an inner crucible formed of partially stabilized zirconia and an outer support member formed of a sintered alumina. The crucibles are in the shape of a cylinder with a closed bottom wall a... | 05/16/1995 |
| 5410567 | Optical fiber draw furnace An induction furnace for heating a portion of an optical preform in order to draw an optical fiber therefrom. The furnace includes a tubular susceptor which is disposed centrally within a housing. The electromagnetic field from a high frequency coil surro... | 04/25/1995 |
| 5384804 | Heat shielding cladding A heat shielding cladding for walls, ceilings, or similar surfaces, especially of industrial furnaces, including butted together parallelepipedal modules that are secured to the wall and comprise a plurality of held together and compacted fiber mat webs t... | 01/24/1995 |
| 5339329 | Induction heated meniscus coating vessel A shallow vessel (50,52) for being horizontally disposed when containing a molten metal or metal alloy (66) for meniscus coating one side of a clean metal strip (34A) when the strip is moved vertically past one side of the vessel. The vessel includes a sh... | 08/16/1994 |
| 5319671 | Prewarning device for induction melting furnace A prewarning device for an induction melting furnace serves for warning of breakouts of molten metal on ceramic furnace linings of melting furnaces. The device has electrodes that may be arranged on the furnace lining in question which are divided into tw... | 06/07/1994 |
| 5283805 | Segmented cold-wall induction melting crucible In a segmented water-cooled induction melting crucible mainly used for melting special metals such as reactive metals or alloys, two adjacent segments are coupled as a segment having two legs, one leg having an inlet water passage and the other leg having... | 02/01/1994 |
| 5280495 | Furnace refractory extraction system and method A furnace refractory extraction system and method includes a selectively removable bottom portion which is attached to a refractory extraction device associated with a container for drawing the refractory lining of a coreless induction furnace into the co... | 01/18/1994 |
| 5280496 | Induction furnace with cooled crucible An induction furnace includes a crucible having a plurality of cooled metallic segments (6A, 6B) electrically insulated from each other and an electromagnetic induction coil (5) arranged around the crucible, wherein the electromagnetic induction coil is e... | 01/18/1994 |
| 5272720 | Induction heating apparatus and method Induction heating vessels and methods are disclosed. One embodiment of an induction heating vessel is a bottom pouring vessel with a crucible for containing a molten metal to be heated and having an outlet in the bottom. A metallic shell with integral cur... | 12/21/1993 |
| 5268925 | Method and apparatus for the semi-continuous melting and discharging of ceramic material in an induction melting furnace with singering crust crucible A method is disclosed for the semi-continuous melting of ceramic material by means of inductive melting in high-frequency and medium-frequency induction melting furnaces whose melting coil surrounds a sintering crust crucible and contains a run-out channe... | 12/07/1993 |
| 5257281 | Induction heating apparatus and method An induction melting vessel comprising a refractory crucible having an opened top end and closed bottom end, with a substantially continuous side wall. A substantially continuous metallic shell surrounds and generally conforms to the side wall and extends... | 10/26/1993 |
| 5218615 | Furnace lining and lining brick therefor with improved heat absorbing characteristics A furnace lining is formed by a plurality of lining bricks. The bricks have surfaces defining an internal surface of the lining that is to face the interior of the furnace and to receive therefrom radiant heat. At least one depression is formed in the lin... | 06/08/1993 |
| 5134629 | Inductor loop coating A high frequency core and coil electric metal melting furnace is shown. This furnace has a lined channel in its inductor for carrying the molten metal. The invention provides an improved inductor for a core and coil furnace that is not subject to leakage ... | 07/28/1992 |
| 4900249 | Aluminum reverberatory furnace lining A lining for use in an aluminum reverberatory furnace or the like for heating molten aluminum in a cavity which cavity is formed by a roof, sidewalls and a bottom which are to be lined with refractory materials. The lining comprises a band of hot face ref... | 02/13/1990 |
| 4823359 | Furnance having dense refractory oxide liner A refractory product is shown in the form of a dense sintered alumina-chromia, zirconia-alumina-silica, zirconia-alumina body, or zirconia-chromia-alumina having less than about 8% of homogeneously distributed closed porosity formed by sintering an intima... | 04/18/1989 |
| 4675879 | Induction furnaces An induction furnace has an inner discardable lining formed from one or more preformed shapes of refractory, heat-insulating material. The discardable lining is easily replaceable using a minimum of time and effort. The lining provides more efficient furn... | 06/23/1987 |
| 4643890 | Perforated reactor tube for a fluid wall reactor and method of forming a fluid wall A reactor tube 20 for a high-temperature fluid wall reactor has a generally cylindrical shape and is made of a refractory material which permits the tube to be heated to incandescence. The reactor tube in turn radiates energy inwardly to a reaction zone t... | 02/17/1987 |
| 4618964 | Ladle or tundish A ladle or tundish has a side wall comprising a refractory lining adapted to be contacted by molten metal, and a concrete wall surrounding the lining and reinforced by metal wires, the side wall being free from a metal shell. Therefore the side wall is re... | 10/21/1986 |
| 4610017 | High frequency induction melting furnace and process for the production of ceramic materials using this furnace Process for the production of ceramic materials by high frequency induction melting. The powder containing the various components of the material to be prepared is introduced in a continuous manner into an aperiodic high frequency electric furnace, whose ... | 09/02/1986 |
| 4608473 | Modified zirconia induction furnace A high temperature induction furnace (10) for drawing lightguide fiber (52) from a silica preform (44) has an axially located tubular zirconium dioxide susceptor (34) therein. Prior to use, at least a portion of the inside surface of the susceptor (34) is... | 08/26/1986 |
| 4580273 | Electrical induction crucible furnace for die casting A furnace comprises a crucible surrounded by an induction heating coil and having a filling mouth and a pouring spout. The crucible is cylindrical in shape having an oval external cross-sectional profile with a major diameter and a minor diameter, and an ... | 04/01/1986 |
| 4550412 | Carbon-free induction furnace An induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subjec... | 10/29/1985 |
| 4503304 | Inductive heating device having a plurality of heating coil units An inductive heating device for uniformly heating a workpiece at rest has a plurality of heating coil units disposed so as to surround the workpiece. The heating coil units are connected in parallel to a power source, and a transformer is used to vary the... | 03/05/1985 |
| 4478676 | Method for decreasing radial temperature gradients of crystal growth melts utilizing radiant energy absorptive materials and crystal growth chambers comprising such materials A method for reducing the radial temperature gradient of a radiant energy emitting heated body is described. The method comprises insulating such heated body with a refractory insulating material containing an efficient absorber of the radiant energy emit... | 10/23/1984 |
| 4471488 | Direct induction melting device for dielectric substances of the glass or enamel type A device is provided for melting by direct induction substances which are dielectric when cold and whose temperatures of inductibility and melting are close to each other, such as glasses or vitreous enamels. This melting is carried out inside a receptacl... | 09/11/1984 |
| 4469925 | Inductive heating device utilizing a heat insulator An inductive heating device for heating a workpiece made of carbon has a heating coil disposed so as to surround the carbon workpiece. A first and second heat insulating layer is interposed between the workpiece and the heating coil, with the first layer ... | 09/04/1984 |
| 4450333 | Zirconia induction furnace A high frequency induction furnace (10) for reflowing a portion of a lightguide preform (44) in order to draw a fiber (52) therefrom. The furnace (10) has a centrally located tubular susceptor (34) therein having a thin coating of the preform material (e.... | 05/22/1984 |
| 4351058 | Induction crucible furnace and method for its preparation An induction crucible furnace includes a housing having a bottom wall and side walls which define a furnace cage. A prefabricated refractory crucible made of a mixture of a dry ramming material, a sintering agent and a cold-curing binder is disposed withi... | 09/21/1982 |
| 4321446 | Apparatus for production of graphite fibers A vertical heating apparatus for production of graphite fibers from preoxidized fibers or carbon fibers comprises of a tubular heating element which generates heat by high frequency induction. A heat-insulating material layer surrounds the tubular heating... | 03/23/1982 |
