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    • 61. 发明授权
    • Protective doorknob encasement device
    • 防护门把手装置
    • US4503692A
    • 1985-03-12
    • US410424
    • 1982-08-23
    • Dean R. Grint
    • Dean R. Grint
    • E05B13/00E05B17/14
    • E05B13/001Y10S16/02Y10S292/02Y10T16/86Y10T70/7921Y10T70/7927Y10T70/796Y10T70/8649
    • A protective doorknob encasement device which provides a protective cover over the space formed between a door jamb and an exterior doorknob to prevent insertion of a tool to forcibly open the door. The invention includes a mounting plate and a track guide to enable slidable attachment of a protective casement. The track guide is configured so as to orient and restrict movement of the casement along the track and only in a direction toward the exterior door surface. Removal of the casement is permitted by its continued forward motion along the track and is only possible when the door is open. This unidirectional forward motion results from use of spring-biased pawls coupled to the casement which catch in corresponding grooves set in the mounting plate to prevent rearward motion. An opening is provided in the casement in alignment with a key slot of the enclosed doorknob to permit normal access.
    • 一种保护性门把手装置,其在形成在门边框和外部门把手之间的空间上提供保护盖,以防止工具插入以强制打开门。 本发明包括一个安装板和轨道引导件,以使得能够滑动地连接保护罩。 轨道引导件被构造成沿着轨道定向和限制窗扇的移动,并且仅沿着朝向外门表面的方向。 通过沿轨道继续向前运动,允许拆卸平开门,只有当门打开时才可以拆卸。 这种单向向前运动是由于使用耦合到平板的弹簧偏压棘爪,其卡住安装板中的相应凹槽以防止向后运动。 一个开口设置在平开门中,与封闭的门把手的键槽对准,以允许正常进入。