Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc.
Patent
1989-05-08
1990-05-22
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
411493, 411496, 411498, 411499, F16B 1500
Patent
active
049273094
ABSTRACT:
A wire nail having a shank, a head formed on one end of the shank, and a point formed on the other end. The point has a penetrating portion, a wedging portion, and a transitional portion. The wedging portion defines four straight edges, each being inclined at an acute angle relative to an axis defined by the shank. The transitional portion defines four straight edges, each meeting a different one of said edges defined by the wedging portion, and each being inclined at a lesser angle relative to the same axis. The wedging portion has a plurality of convex surfaces, each conforming generally to a section of a circular cylinder. The transitional portion has a plurality of convex surfaces, each conforming generally to a section of a circular cylinder. A cutting tip is formed as a thin rib extended across the penetrating portion. A pair of thin cutting ribs extended from the cutting tip are formed along the wedging and transitional portions.
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International Staple, Nail & Tool Association, Bulletin No. UM-25d.
U.S.D.A., Wood Handbook, Agricultural Handbook 72 (revised 1987).
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