F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 25/02 (2006.01) C21D 9/00 (2006.01) F16B 25/10 (2006.01) F16B 33/06 (2006.01) F16B 35/06 (2006.01)
Patent
CA 2183624
A self-drilling/self-tapping fastener which is suitable for attaching a sprinkler system to a metal supporting structure has a driving head and an integral shank with a threaded portion. Process-hardening and threading of the shank harden the shank to a degree of hardness that retains sufficient ductility for resisting vibration loads. The drill tip at the end of the shank and the lead threads adjacent the drill tip are locally hardened to a relatively high degree-of hardness for drilling and tapping the metal support members. A graduated transition zone separates the high-hardness zone from the lower-hardness zone, which allows for a single fastener to exhibit two distinctly different material properties-in one fastener. The fastener through this dual process also exhibits two distinct load-carrying capabilities.
Easter Jeffrey R.
Janusz Michael
Melvin Gregg E.
Monahan Patrick M.
Easter Jeffrey R.
Infastech Intellectual Properties Pte. Ltd.
Janusz Michael
Macrae & Co.
Melvin Gregg E.
LandOfFree
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