Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Shank or penetrating end structure
Patent
1999-01-13
2000-07-11
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Shank or penetrating end structure
411440, 411447, 411900, F16B 1500, F16B 1914
Patent
active
060863056
ABSTRACT:
A selectively hardened nail includes a nail head, an elongated shank, and a tip. A portion of the nail shank is made harder than the remainder by selectively heat treating that portion, and cooling it. The nail has controlled bending properties. The selectively hardened portion does not significantly bend when the nail is fired at a surface using a power driving tool, or during use of the nailed object.
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Marketing brochure of Elco Industries, Inc., entitles "DRIL-FLEX, A New Concept In Structural Fastening", dated Feb. 1989.
Godsted Kent B.
Lat Geronimo E.
Spoto Louis M.
Illinois Tool Works Inc.
Wilson Neill
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