Class 373/157 - Conducting (e.g., graphite)

Subclass of Class 373 - Industrial electric heating furnaces
Definition: Subject matter wherein the crucible is constructed of material which allows
No. of patents: 33
Last issue date: 09/26/2006

Number	Title	Issue Date
7113535	Induction furnace for melting granular materials A continuous- or intermittent-melt induction furnace useful for heating and/or melting semi-conductor or other materials includes an induction coil, a susceptor switchable between open and closed electric circuit modes, and a crucible. The susceptor is inductively o...	09/26/2006
7110430	Induction furnace for melting semi-conductor materials An induction furnace includes an induction coil, an electrically non-conductive crucible having an inner diameter disposed within the induction coil, and an electrically conductive member disposed below the crucible and having an outer diameter which is further from...	09/19/2006
6898232	Induction furnace for high temperature operation An induction furnace capable of operation at temperatures of over 3100° C. has a cooling assembly (60), which is selectively mounted to an upper end of the furnace wall (76). The cooling assembly includes a dome (62), which is actively cooled b...	05/24/2005
6741632	Ultra high temperature rapid cycle induction furnace An induction furnace that has a plurality of high temperature electrically conductive ceramic electrodes having no connecting electrical lead (leadless electrode). The leadless electrodes are exterior to and proximate a working furnace space. At least one metallic e...	05/25/2004
6724803	Induction furnace for high temperature operation An induction furnace capable of operation at temperatures of over 3100° C. has a cooling assembly (60), which is selectively mounted to an upper end of the furnace wall (76). The cooling assembly includes a dome and a lifting mechanism (80), mo...	04/20/2004
6600769	Device and method for manufacturing a preform The invention relates to a device for manufacturing a preform, wherein a carrier tube is collapsed to a preform, which device comprises a heating element forming a cylindrical envelope, which envelope defines an annular inlet opening and an annular outlet...	07/29/2003
6568215	Method and apparatus for melting a particulate material Apparatus suitable for vitrifying nuclear waste comprises a tunable microwave cavity connected by a first wave guide to a source of microwave energy; cooling coils for cooling the exterior of the cavity; a hopper for loading particulate fusible material t...	05/27/2003
5970083	Device for injecting non-oxidizing gas into a furnace Device for injecting non-oxidizing gas into a furnace with a graphite concentrator (12) as the heating element used to heat a primary preform in the enclosure of the furnace (14) and moving relative to the furnace in its axial direction, and comprising at...	10/19/1999
5848093	Fiber-drawing furnace for drawing down an optical-fiber preform into an optical fiber The fiber-drawing furnace includes a graphite tube positioned vertically, heated by induction, and subjected internally to an inert atmosphere, said tube internally defining a fiber-drawing chamber. In the furnace said graphite tube is a double-walled tub...	12/08/1998
5636241	Levitation melting crucibles Disclosed is a levitation melting crucible which can facilitate penetration of magnetism into the crucible and which can prevent a molten metal from being contaminated by an insulating material. The levatation melting crucible comprises a cylindrical main...	06/03/1997
5502743	High temperature furnace A furnace configuration is disclosed in which the furnace is inductively heated by external insulated coils and a susceptor is placed within the charge of reactants away from the outer surfaces of the charge. Consequently, heat is transferred to the charg...	03/26/1996
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
5260538	Device for the magnetic inductive heating of vessels The inductive heating of a reactor vessel by an external electromagnetic heating source is made more uniform by placing a susceptor between the heating source and the reactor vessel. In preferred embodiments, the reactor vessel is a fluidized bed vessel m...	11/09/1993
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
5109389	Apparatus for generating an inductive heating field which interacts with metallic stock in a crucible An apparatus for melting metallic stock as a crucible in which the metallic stock is received and melted, the stock in the crucible having an axis along which the force of gravity varies, and an inductive heating system which generates an inductive heatin...	04/28/1992
5087490	Method for making an impregnated ceramic material A method for impregnating a shaped ceramic material with an impregnation liquid, comprising the steps of placing the shaped ceramic material in the impregnation liquid, and applying an impregnation pressure to the impregnation liquid through a pressure tr...	02/11/1992
5058127	Bottom discharge cold crucible The present invention relates to a cold crucible adapted to be discharged through the bottom. The crucible consists of a conductive wall consisting of a plurality of longitudinal hollow segments which are electrically insulated at least partially from one...	10/15/1991
4888242	Graphite sheet material A refractory heat-insulating graphite sheet material characterized in that the material comprises a graphite sheet....	12/19/1989
4838933	Apparatus for melting and continuous casting of metals, the process involved and use of the apparatus Apparatus for melting and continuously casting metals, comprising a vertical, conductive cold crucible (1) with at least part of the height of its wall in the form of longitudinal sectors (2) which are electrically insulated from one another and have a co...	06/13/1989
4761528	High frequency induction melting furnace An induction furnace for melting refractory materials into a molten state by induction from a high frequency alternating current source. The furnace comprises a material holding crucible formed by a substantially cylindrical side wall having a single cyli...	08/02/1988
4666681	Apparatus for producing a monocrystal According to the invention, an apparatus for producing a monocrystal comprises at least one thermally conductive crucible for receiving the material, a thermally conductive holder having a part able to receive each crucible and extended by a projection, a...	05/19/1987
4660212	Cold cage for a melting crucible by high frequency electromagnetic induction Cold cage for a crucible with melting by high frequency electromagnetic induction comprising in per se known manner a series of hollow segments traversed by the cooling water and surrounded by a high or medium frequency induction coil and in which the pro...	04/21/1987
4563558	Directional recrystallization furnace providing convex isotherm temperature distribution Concepts for producing thermal conditions, in strip material, conducive to directional recrystallization are disclosed. An inductively heated susceptor contains a slot and the susceptor shape develops a thermal condition where the edges of the strip are c...	01/07/1986
4539645	Automated sample analyzer for induction furnace analysis An automated sample analyzer for induction furnace analysis includes an induction furnace having an induction coil housing with an induction coil therein. The coil housing has a lower opening through which a crucible with a sample can be moved to allow th...	09/03/1985
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
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
4446563	Composite crucible A composite crucible for melting by an induction process samples to be analyzed is placed in the interior of an induction heating coil supplied with electric current ofhigh frequency. The composite crucible is constituted by two containers, one inserted i...	05/01/1984
4432093	Melting device by direct induction in a cold cage with supplementary electromagnetic confinement of the load A direct induction furnace or device for melting a charge held in a cold sheath or shroud with electromagnetic confinement of the conducting portions of the charge. The cold shroud comprises a cylindrical sidewall, which is composed of a plurality of juxt...	02/14/1984
4409451	Induction furnace having improved thermal profile Apparatus for casting directionally solidified articles is disclosed. Concepts for obtaining a desired temperature profile in an induction furnace are discussed. An induction furnace 10 has increased heating capacity at the withdrawal end 32 of the suscep...	10/11/1983
4201882	Induction melting furnace An induction furnace intended for melting a metal which is disposed in a crucible in an alternating magnetic field developed by an inductor enveloping this crucible. Induced in the metal is a current which heats the latter. Fixedly mounted intermediate th...	05/06/1980
4142063	High-frequency electric furnace The invention relates to a high-frequency furnace whose wall is formed by superposed wall-forming members. This furnace includes in particular an inner tubular wall comprising a zirconia tube (38), an alumina washer (39) laid on the zirconia tube and a si...	02/27/1979
4055391	Crucible A crucible, especially for containing melts, has a multichamber construction wherein there is an outer chamber for containing a heat distribution medium and an inner chamber which acts as a receptacle for the melt....	10/25/1977
3980854	Graphite susceptor structure for inductively heating semiconductor wafers A susceptor for heating a plurality of semiconductor wafers, as by rf induction, comprises a hollow truncated pyramid of conventional graphite. The walls of the pyramid are planar except for ledges extending from the outer surfaces of the walls for suppor...	09/14/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 373/157 - Conducting (e.g., graphite)