F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 15/00 (2006.01) B21G 3/30 (2006.01) B21H 1/22 (2006.01) F16B 19/00 (2006.01) F16B 19/14 (2006.01) F16B 43/00 (2006.01) B21H 1/18 (2006.01) B21H 7/14 (2006.01) F16B 41/00 (2006.01)
Patent
CA 2254250
As formed from a predetermined length of carbon steel wire, such as AISI C 1062 steel wire or high-manganese carbon steel wire, in sequential forming, rolling, and austempering steps, a pin for axial, non-rotational penetration into a steel, concrete, or masonry substrate has a head, a tapered shank, a point having a tip, and a transition zone between the tapered shank and the head. The head has an outer diameter at least about 2.6 times greater than the initial diameter of the wire predetermined length. The smaller end of the tapered shank has a diameter about 0.6 times the initial diameter thereof. The larger end of the tapered shank has a diameter about 0.7 times the initial diameter thereof. The point is joinedunitarily to the smaller end of the tapered shank and conforms except at the tip, which is rounded, substantially to a tangent ogive, which is tangent to the tapered shank. The transition zone has a tapered portion with a smaller end joined unitarily to the larger end of the tapered shank and a with larger end joined unitarily to the head at a circumferential fillet. The larger end of the taperedportion of the transition zone has a diameter about 1.1 times greater than the initial diameter of the wire predetermined length. The axial length of the transition zone is less than about one half of the axial length of the tapered shank. The austempering step provides the pin with a surface hardness not greater than about Rockwell C 48 and with a core hardness in a range from about Rockwell C 48 to about Rockwell C 58.
Olvera Gilbert
Velan George M.
Finlayson & Singlehurst
Illinois Tool Works Inc.
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