Punch for forming threaded fasteners with spiral drive
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United States of America Patent
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-
May 22, 2001
Grant Date -
N/A
app pub date -
Jul 19, 1999
filing date -
Oct 31, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
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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