Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Including integral locking means
Patent
1988-04-08
1990-12-25
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Including integral locking means
411922, 16 16, F16B 1508
Patent
active
049798596
ABSTRACT:
A fastener for attaching objects such as tow boards to hardened substrates such as a concrete floor is constructed in the form of a driven nail having a head. The shank of the nail is constructed of a plurality of symmetrical hardened prismatic edges, at least three being required for proper resistance to hammering loads. The edges extend from the outer periphery of the head to the driving point; the prisms are joined to form the central axis of the fastener.
The construction of the nail is such that all force from driving blows is contained and supported within one or more of the edges, preventing bending of the nail shank at the juncture of nail head and shank, and preventing deformation of the nail under the driving force of a hammer.
REFERENCES:
patent: 895080 (1908-08-01), Eisenreich
patent: 2226141 (1940-12-01), Sabo
patent: 2412517 (1946-12-01), Klein
patent: 4755091 (1988-07-01), Potucek et al.
Norcross Alexander
Wilson Neill R.
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