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Class Information
Number: 373/77
Name: Industrial electric heating furnaces > Arc furnace device > Furnace body detail > With internal atmosphere control (e.g., pressure, vacuum, etc.)
Description: Subject matter wherein the furnace body is sealed and means are provided to increase the pressure within the furnace, or to create a vacuum therein.

Patents under this class:

Patent Number Title Of Patent Date Issued
7672355 Metal vapor vacuum arc ion source Mar. 2, 2010
7426230 Sealed device for preventing exhaust gas leakage Sep. 16, 2008
7112904 Magnetic rotation transmitting device, hermetic stirring unit, and electric furnace Sep. 26, 2006
6748004 Methods and apparatus for improved energy efficient control of an electric arc furnace fume extraction system Jun. 8, 2004
6549558 Melting and holding furnace for aluminum blocks Apr. 15, 2003
6535543 Device to take in fumes and cool the roof of electric furnaces Mar. 18, 2003
6108363 Oxygen injector Aug. 22, 2000
5943360 Electric arc furnace that uses post combustion Aug. 24, 1999
5896409 Fume intake and cooling device for electric arc furnaces Apr. 20, 1999
5787108 Exhaust device for electric arc furnaces and relative method Jul. 28, 1998
5544194 Apparatus for degreasing electrically conductive material Aug. 6, 1996
5496988 Device for soldering components on plates Mar. 5, 1996
5406579 Dynamic seal Apr. 11, 1995
5394431 Apparatus for preventing dust accumulation in exhaust duct of an electric furnace Feb. 28, 1995
5247538 Melting furnace with manipulator for closing crucibles vacuum-tight Sep. 21, 1993
5241559 Electric arc furnace roof Aug. 31, 1993
5121406 Induction melting furnace Jun. 9, 1992
5081640 Method of controlling a temperature of a molten metal Jan. 14, 1992
4953177 Method and means of reducing the oxidization of reactive elements in an electroslag remelting operation Aug. 28, 1990
4512737 Hot zone arrangement for use in a vacuum furnace Apr. 23, 1985
4450569 Method and structure for maintaining effluent pressure range within an electric arc melting furnace May. 22, 1984
4371392 Process for refining a molten metal Feb. 1, 1983
4352189 Atmosphere control of slag melting furnace Sep. 28, 1982
4347614 Apparatus for refining ferrosilicon Aug. 31, 1982
4347400 Apparatus for reheating molten steel in ladles Aug. 31, 1982
4323763 Parametric power controller Apr. 6, 1982
4216347 Vacuum-electric arc heating system Aug. 5, 1980
4137422 Airtight metal melting furnace Jan. 30, 1979
4065634 Skull furnace for melting highly reactive metals under vacuum or neutral atmosphere Dec. 27, 1977
4027095 Hermetically sealed arc furnace May. 31, 1977
4022612 Production of alloys of iron May. 10, 1977

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