Spiral drive system for threaded fasteners

Details Spiral drive system for threaded fasteners Spiral drive system for threaded fasteners

1997-10-31

1999-09-28

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Externally threaded fastener element, e.g., bolt, screw, etc.

Head driving structure

411403, 411919, F16B 2300, F16B 3506

Patent

active

059576456

ABSTRACT:
A spiral drive system for threaded fasteners includes driver-engageable surfaces on the head end of the fastener in which at least some of the driver-engageable surfaces are defined by a spiral segment 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 and related tooling also are disclosed.

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