Heating – Work chamber having heating means – Work chamber having gaseous material supply or removal...
Patent
1983-05-23
1985-04-23
Yuen, Henry C.
Heating
Work chamber having heating means
Work chamber having gaseous material supply or removal...
432194, 373 77, F27B 504
Patent
active
045127379
ABSTRACT:
The present invention includes a heat insulation wall which is formed in a closed plane configuration, such as a circle, and which has first and second pairs of apertures formed therein to accommodate cooling (inert) gases which are introduced into the heat chamber defined by said insulation wall. The cooling gases pass into the heat chamber and out of the heat chamber through the first and second pairs of apertures to cool a workpiece which has been heat treated. The pairs of apertures lie (in pairs) opposite one another on the periphery of the heat insulation wall. Outside of the heat insulation wall, lying opposite the first pair of apertures, is located a heat reflecting member and opposite the second pair of apertures, outside of the heat insulation wall, there is located a heat reflecting baffle. Accordingly when the heat chamber is operating in a heat treating mode any heat which passes through an aperture or a pair of apertures is reflected back through said apertures into the heat chamber. The baffle is located within an exit channel housing which is formed to fit over the second pair of apertures. The exit channel housing has an opening lying on the side of the baffle away from the insulation wall or away from the second pair of apertures. Mounted on that opening is an exahust fan which when operative draws gases from the heat chamber. Accordingly when the system is in a quenching, or cooling mode, inert gases are drawn through the first pair of apertures (which are located in the bottom of the heat insulation wall), through said heat chamber to come in contact with the workpiece and effect a cooling thereof, through the second pair of apertures, around the baffle and out of the opening into the exhaust fan.
REFERENCES:
patent: 3565410 (1971-02-01), Scherff
patent: 4212633 (1980-07-01), Koieder et al.
patent: 4280807 (1981-07-01), Smith, Jr. et al.
patent: 4325694 (1982-04-01), Bergman
Cleaver William E.
Vacuum Furnace Systems Corporation
Yuen Henry C.
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