FIREPROOF SHUTTER
    2.
    发明申请
    FIREPROOF SHUTTER 审中-公开

    公开(公告)号:US20190063144A1

    公开(公告)日:2019-02-28

    申请号:US16106509

    申请日:2018-08-21

    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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