公开(公告)号：EP1025370A1

公开(公告)日：2000-08-09

申请号：EP98956280.6

申请日：1998-10-28

申请人： Creare Inc.

发明人： STACY, W., Dodd

IPC分类号： F16B23/00 ,  B25B15/00 ,  B21K1/46

CPC分类号： B25B15/005 ,  B21K1/463 ,  F16B23/003 ,  Y10S411/919

摘要： A spiral drive system for threaded fasteners (10) includes driver-engageable surfaces on the head end (16) of the fastener (10) in which at least some of the driver-engageable surfaces are defined by a spiral segment (8) configured to maximize torque transmission while spreading the driving load over a broad driver-fastener interface to reduce the risk of development of high stress regions. Drivers (4) and related tooling also are disclosed.