专利名称：SELF TAPPING SCREW
发明人：GROSSBERNDT, Hermann,KÖNIG, Gottfried 申请号：EP1998004719
申请日：19980728
公开号：WO99/006715P1
公开日：
19990211
专利内容由知识产权出版社提供
摘要：The invention pertains to a screw produced by cold rolling, designed to be screwed into plastic material, and having a lf tapping thread, the fillets (3) of which are formed, in a ctional view, like a knife blade. The fillet flank surface (6, 8) features an inward curve (5) in its central third and forms an outer thread flank angle (α) of approximately 300 (between the curve (5) and the crest of thread (27)) as well as an inner thread flank angle (β) (between the curve (5) and the thread root (7)), while the inner thread flank angle (β) in the central portion is substantially equal to or larger than a third of the outer thread flank angle (α). The invention also relates to a screw, the shank end (34) of which operates as a guide for screwing said screw into a bore (41), while the thread end (32) prents, on the one hand, an end area (36) having a cutting edge (58) for cutting its channel of screw and being oriented askew relative to the radial direction of the screw and, on the other hand, a ba line (56) which extends the thread foot edge (60) between a thread flank (49) and the shank jacket (33) and runs in the spiral direction of the screw (32) according to an angle (β) substantially deviating from 900, while the cutting edge (48) extends into the crest (40) of thread.
申请人：GROSSBERNDT, Hermann,KÖNIG, Gottfried
地址：DE,DE,DE
国籍：DE,DE,DE
代理机构：BARDEHLE, Heinz 更多信息请下载全文后查看
