发明名称 Screw having a combined screwdriver slot
摘要 The invention relates to a screw (3) having a depression (2), which is formed on the head upper side and is intended for receiving a corresponding shaped-tip screwdriver, and having at least one slot (8, 9) which is combined therewith and is intended for receiving the tip (12) of a flat-tip screwdriver. In order to improve the gripping surface in the case of said screw, the slot (8, 9) widens slightly towards both ends. <IMAGE>
申请公布号 DE3117658(A1) 申请公布日期 1982.11.25
申请号 DE19813117658 申请日期 1981.05.05
申请人 J. GEORG BIERBACH SCHRAUBENFABRIK 发明人 RENNINGER,KARL;KNOCHE,ALFONS
分类号 F16B23/00;(IPC1-7):F16B23/00 主分类号 F16B23/00
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