Industrial furnaces for the heat treatment of metallic workpieces
AssigneeIpsen Industries International Gesellschaft mit beschrankter Haftung
InventorsFerdinand Limque, Hans Bertrand
Life of this patent
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Abstract
An industrial furnace, particularly a single-chamber vacuum furnace, for heat treatment of metallic workpieces, with a heating chamber which is formed in a housing, which heating chamber is heatable via heating elements and is provided on the bottom and on the ceiling with a closable chamber opening for the passage of a quenching gas which can be circulated by means of a blower. A flap is swingably mounted at the chamber opening underneath a closing slide, which chamber opening is provided for the entrance of the gas. The flap controls the incoming flow of gas within the range of the free cross-section of the chamber opening.
Claims12
An industrial furnace, particularly a single-chamber vacuum furnace, for heat treatment of metallic workpieces, comprising
- a furnace housing formed with a heating chamber inside said furnace housing,
- means comprising heating elements for heating said heating chamber,
- a bottom and a top of said heating chamber is formed with a closable chamber opening directly exposed to said heating chamber for the passage of a quenching gas,
- means including a blower and connections for circulating the gas substantially vertically downwardly through said chamber opening and said heating chamber,
- said chamber opening in said top being a gas entrance chamber opening for the incoming flow of gas,
- a closing slide disposed above the gas entrance chamber opening and constituting means for closing said gas entrance chamber opening,
- means comprising a flap swingably mounted adjacent the gas entrance chamber opening, said flap means for cooperating with said gas entrance opening to alternately open and close different cross-sections thereof for controlling the incoming flow of gas in the vicinity of an exposed cross-section of the gas entrance chamber opening.
Dependencies are inferred from the claim text.