Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Having means to facilitate explosive driving
Patent
1995-06-06
1997-08-19
Wilson, Neil R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Having means to facilitate explosive driving
411493, 411499, F16B 1500, F16B 1914
Patent
active
056581092
ABSTRACT:
A steel pin is disclosed of a type to be forcibly driven into a steel substrate via a powder-actuated tool. The steel pin has a substantially cylindrical shank and a substantially sharp point, which extends from one end of the substantially cylindrical shank, which conforms substantially to a tangent or secant ogive except for a substantially spherical tip having a radius in a range of about 0.015 inch (about 3.75 millimeters) to about 0.03 inch (about 7.5 millimeters), which has substantially true concentricity, which has surface-texture irregularities with a roughness-height index value not greater than about 30 microinches (about 0.76 micrometers), and which appears to be substantially free of other surface imperfections when viewed under 60.times. magnification. Optimally, the ogive is a tangent ogive with an ogive radius about ten times the shank diameter and with an ogive length about twice the shank diameter, and the tip radius is about 0.1 times the shank diameter. The substantially cylindrical shank is joined to the substantially sharp point at a transition having a substantially smooth, continuously curved surface, and is knurled near the transition. The steel pin is made by deforming a length of steel wire, as by forging or swaging, so as to form the steel pin with the substantially cylindrical shank and with the substantially sharp point and reshaping the substantially pointed end, as by barrel finishing.
REFERENCES:
patent: 2751808 (1956-06-01), MacDonald et al.
patent: 4802802 (1989-02-01), Thurner
patent: 4915561 (1990-04-01), Buhri et al.
patent: 4979858 (1990-12-01), Van Allman et al.
The Penetration of Thick Steel Plates by Ogive Shaped Projectiles -Dikshit - 1992.
Normal Impact and Perforation of Thin Plates by Hemispherically Tipped Projectiles Levy, 1984.
Studies in Penetration Mechanics - Batra, 1989.
Impact Models for Penetration and Hole Growth-Walters, 1978.
Penetration of Concrete Targets - Forrestal, 1993.
An Empirical Equation for Penetration Depth of Ogive-Nose Projectiles Into Concrete Targets-Forrestal, 1993.
Baumeister et al., Marks' Standard Handbook for Mechanical Engineers, Eighth Edition, McGraw-Hill Book Company, New York (1978) at pp. 13-73 through 13-79.
ASTM Standard Specification for Structural Steel (1969) at pp. 78 through 81 (Specification A36-69).
Heflin William M.
McConnell Ronnie L.
Syvarth James H.
Van Allman Don T.
Illinois Tool Works Inc.
Wilson Neil R.
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