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Class Information
Number: 373/139
Name: Industrial electric heating furnaces > Induction furnace device > Zone melting
Description: Subject matter wherein a narrow portion of a solid charge is liquified by the heating means.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8571085 Induction furnace for the controllable melting of powder/granular materials Oct. 29, 2013
8323981 Induction furnace operating in a range from 2-9 MHz for providing analytical samples and method of same Dec. 4, 2012
7976771 Method for reducing oxidic slags and dusts and inductively heatable furnance for carrying out this method Jul. 12, 2011
7814767 Method and induction furnace for drawing large diameter preforms to optical fibres Oct. 19, 2010
7388896 Induction melter apparatus Jun. 17, 2008
6993061 Operating an induction melter apparatus Jan. 31, 2006
6452140 Floating/melting using dummy micro-gravitational field by magnetic force Sep. 17, 2002
6307875 Induction heating furnace and bottom tapping mechanism thereof Oct. 23, 2001
6222167 Impedance matching apparatus for induction heating type galvanized steel sheet alloying system and method Apr. 24, 2001
5993058 Thermomechanical characterization system using a fast induction heating device Nov. 30, 1999
5940427 Crucible induction furnace with at least two coils connected in parallel to a tuned circuit converter Aug. 17, 1999
5923699 Induction furnance heating module and gas zone Jul. 13, 1999
5902508 Induction heating coil suitable for floating zone processing May. 11, 1999
5887018 Longitudinal electromagnetic levitator Mar. 23, 1999
5848093 Fiber-drawing furnace for drawing down an optical-fiber preform into an optical fiber Dec. 8, 1998
5550354 High-frequency induction heating coil Aug. 27, 1996
5528620 Levitating and melting apparatus and method of operating the same Jun. 18, 1996
5479436 Method of heating and melting metal and apparatus for melting metal Dec. 26, 1995
5479438 Apparatus for fusing a solid layer of electrically conductive material Dec. 26, 1995
5416796 Float melting apparatus and method employing axially movable crucibles May. 16, 1995
5394432 Levitating and fusing device Feb. 28, 1995
5308594 Edge-heat-sink technique for zone melting recrystallization of semiconductor-on-insulator films May. 3, 1994
5241560 Crucible induction furnace provided with a preventive measure against low melting point metals Aug. 31, 1993
5135726 Vertical gradient freezing apparatus for compound semiconductor single crystal growth Aug. 4, 1992
5134261 Apparatus and method for controlling gradients in radio frequency heating Jul. 28, 1992
5114528 Edge-defined contact heater apparatus and method for floating zone crystal growth May. 19, 1992
5109389 Apparatus for generating an inductive heating field which interacts with metallic stock in a crucible Apr. 28, 1992
5034199 Zone melt recrystallization apparatus Jul. 23, 1991
5033948 Induction melting of metals without a crucible Jul. 23, 1991
5003551 Induction melting of metals without a crucible Mar. 26, 1991
4942279 RF induction heating apparatus for floating-zone melting Jul. 17, 1990
4931945 Method of controlling floating zone Jun. 5, 1990
4900887 Floating zone drawing circuitry for semiconductor rods Feb. 13, 1990
4876438 Control of the power to the heater and the speed of movement of a crystal rod by control of the crystal rod diameter Oct. 24, 1989
4873063 Apparatus for zone regrowth of crystal ribbons Oct. 10, 1989
4866230 Method of and apparatus for controlling floating zone of semiconductor rod Sep. 12, 1989
4833287 Single-turn induction heating coil for floating-zone melting process May. 23, 1989
4797525 Induction heater for floating zone melting Jan. 10, 1989
4752451 Apparatus for producing a strain-free monocrystal of a crystalline ferroelectric compound Jun. 21, 1988
4619811 Apparatus for growing GaAs single crystal by using floating zone Oct. 28, 1986
4608473 Modified zirconia induction furnace Aug. 26, 1986
4538279 Induction coil in the form of a pancake coil for crucible-free zone melting Aug. 27, 1985
4450333 Zirconia induction furnace May. 22, 1984
4392230 Method and apparatus for the manufacture of silicon by crucible-free zone melting Jul. 5, 1983
4361716 Current lead-in of the coaxial type for sealing to a container wall Nov. 30, 1982
4331827 Method of producing current lead-ins having coaxial construction May. 25, 1982
4292487 Method for initiating the float zone melting of semiconductors Sep. 29, 1981
4275035 Apparatus for electrical feed of a heater in a crystal-growing vessel Jun. 23, 1981
4162367 Method of crucible-freeze zone-melting a semiconductor rod and apparatus for carrying out the method Jul. 24, 1979
4110586 Manufacture of doped semiconductor rods Aug. 29, 1978

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