Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Shank or penetrating end structure
Patent
1997-03-07
1998-07-28
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Shank or penetrating end structure
411482, 411441, 411424, F16B 1500
Patent
active
057854785
ABSTRACT:
A fastener comprising a shaft having a preselected length for use in fastening at least two materials together. A head extends radially around the shaft at one end. The shaft is provided with an enlarged shaft portion located in proximity to the head. The enlarged shaft portion has a pair of opposite ends, a cylindrical center portion and a pair of frusto-conical tapered portions. Each of the frusto-conical tapered portions extends from the center portion to one of the ends. The enlarged shaft portion has a length less than the length of the shaft.
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