Retort Furnace for Heat Treating Metal Workpieces
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United States of America Patent
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app pub date -
Jan 24, 2011
filing date -
Aug 22, 2008
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Abandoned
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Abstract
In a retort furnace having a heating assembly, a circulation unit, and an assigned cooling unit, uniform and rapid cooling of the heat-treated workpieces is achieved by three solution variants. The first variant includes a second floor (9.1) assembled to a floor (9) to form an intermediate space which is divided into two ring spaces which are isolated gastight from one another including a first volume space (16) and a second volume space (17). The second variant includes situating throttle valves (20, 21) in a housing (36), each valve having a receptacle space (33), into which a valve plug is movable. In the third variant which is a combination of the first and second variants, the first volume space (16) and the second volume space (17) are adapted to interact for flow technology in such a manner that in the open position of the plug, the flow cross-section of each line (11, 14) is completely unblocked and provides circulation of a cold gas with favorable flow and therefore rapid cooling of the batch (7).
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