首页|Patent Issued for Device for opening/closing (USPTO 11938534)
Patent Issued for Device for opening/closing (USPTO 11938534)
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The patent’s assignee for patent number 11938534 is Krosakiharima Corporation (F ukuoka, Japan).News editors obtained the following quote from the background information suppli ed by the inventors:“BACKGROUND ART“A sliding nozzle device for use in a ladle or a tundish is composed using two o r three refractory plates,each of which is attached to a respective one of two or three plate-receiving metal frames. When theseplates reach the end of their life due to wear damage, it is necessary to open the sliding nozzle device to take out the old plates from respective ones of the plate-receiving metal frames, and replace the old plateswith new ones. This replacement operation imposes a h eavy burden on an operator, because it has to beperformed under high temperatur e, and the weight of the plate, particularly heavy ones, is close to 30 kg.
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