发明名称 SELF-DRILLING SCREW
摘要 Disclosed is a screw for hard wood, comprising a screw tip (3) with two cutting edges (5) that extend approximately parallel to each other and perpendicular to the longitudinal axis of the screw. The cutting angle of the cutting edges amounts to about 90°. A centering tip (7) which slightly protrudes from the two cutting edges (5) is embodied in the extension of the longitudinal axis of the screw. Said centering tip (7) prevents the screw from deviating to the side at the beginning of the drilling process.
申请公布号 CA2651841(C) 申请公布日期 2012.05.01
申请号 CA20072651841 申请日期 2007.05.25
申请人 ADOLF WURTH GMBH & CO. KG 发明人 WOLPERT, FRANK;WANNER, JURGEN;WUNDERLICH, ANDREAS
分类号 F16B25/10 主分类号 F16B25/10
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