发明名称 Door knob security device
摘要 A security device for use with rotatable door knobs which incorporates a pair of generally cylindrical members positioned on a door knob and telescoped together to receive a padlock to prevent separation. The housing members rotate relative to each other and to the door knob to prevent actuation of the door knob and access to any keyed lock that may be incorporated in the knob.
申请公布号 US5425256(A) 申请公布日期 1995.06.20
申请号 US19940254905 申请日期 1994.06.06
申请人 CROSBY, THEODORE M. 发明人 CROSBY, THEODORE M.
分类号 E05B13/00;(IPC1-7):E05B17/14 主分类号 E05B13/00
代理机构 代理人
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