Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1992-12-23
1994-03-15
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411113, 411183, 411967, F16B 1304, F16B 3704
Patent
active
052942236
ABSTRACT:
A fastener particularly suited to affixing metal to plastic parts, such as fastening electrical connectors to plastic circuit board mounting housings, includes a head and an elongate shank with an internally threaded through-bore. Located directly beneath the head is a shoulder which extends along the outside of the shank a distance equal to the total width of the parts to be joined. A mid-section of the shank is of reduced diameter, creating a thin-walled area of the shank compared with the areas at either end. A bottom part of the fastener includes internal threads, said bottom part beginning at the end of the thin-walled, mid-section of the shank. The through-bore includes a step down to a reduced diameter at the end of said mid-section. Therefore, when axially compressed, the fastener repeatedly bulges outwardly at its weakest point which lies just beyond the shoulder. The parts to be joined are thus trapped between the head and this radial bulge of the shank.
REFERENCES:
patent: 2359031 (1944-09-01), Goshia
patent: 2914106 (1959-11-01), Boyd
patent: 3215026 (1965-11-01), Davis
patent: 3322449 (1967-05-01), Becker
patent: 3948142 (1976-04-01), McKay et al.
patent: 4182216 (1980-01-01), DeCaro
patent: 4717612 (1988-01-01), Shackelford
Gore Gregory J.
Penn Engineering & Manufacturing Corp.
Wilson Neill R.
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