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公开(公告)号：US10954714B2
公开(公告)日：2021-03-23
申请号：US16106509
申请日：2018-08-21
Applicant: SEMES CO., LTD.
Inventor： Seung Keun Jun , Young Woo Kim , Tae Youl Youn , Wang Hyeon Son
Abstract: Disclosed is a fireproof shutter for opening and closing a passage between an upper story and a lower story. The fireproof shutter includes a base panel having an opening corresponding to the passage, a door for opening and closing the opening, and a guide unit for guiding the door between an open position in which the door is opened and a closed position in which the door is closed and having a predetermined inclination such that the door is closed by its own weight.
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