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    Breakaway post
    2.
    发明授权
    Breakaway post 失效
    BREAKAWAY POST

    公开(公告)号：US3570376A

    公开(公告)日：1971-03-16

    申请号：US3570376D

    申请日：1968-01-16

    申请人： OVERTON CONTAINER CORP

    发明人： OVERTON DOLPHIN D ,  RUSTIN RUDLOPH B JR ,  HUGHES WILLIAM E

    IPC分类号： E01F9/011 ,  E01F9/018 ,  E04H12/04

    CPC分类号： E01F9/623 ,  E01F9/635

    摘要： A breakaway post is provided for supporting highway signs or the like. The post is made from independent flat rectangular segments arranged end to end to form three panels, with the segments secured together along their side edges to form a hollow post having a triangular cross section. A plurality of breakaway lines to start the breakup of the post upon impact by an automobile or the like are provided by the ends of the segments. The ends of the segments of any one panel are staggered longitudinally with respect to the ends of the segments of the other panels except at the top and bottom of the post. Staggering of the ends of the segments results in a post having sufficient strength to withstand wind loading even when signs are attached to the post.