Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Design of fastener or substructure restricts rotation
Patent
1990-09-28
1991-10-08
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Design of fastener or substructure restricts rotation
411258, 403271, 403343, 228 2, F16B 3706, B23K 2012, B23K 3700
Patent
active
050549804
ABSTRACT:
A composite, friction weldable stud is used to affix a first plate to a second plate made of dissimilar materials. The stud has a first body made of material compatible with the first plate, with the body having a shank and a collar extending outwardly therefrom of a predetermined diameter. The collar has a first surface extending toward the shank with grooves to mate with cooperating ridges of a chuck of a friction-welding tool. The stud further includes a second body of material compatible with the second plate. The second body has a friction-weldable nose extending outwardly from the collar and substantially coaxial with an axis of the first body. The first and second bodies have cooperating threaded for affixing the two bodies together so that they can move as a unit. A hole is formed in the first plate which is larger than the nose but smaller than the collar. The nose is placed through the first hole into contact with the second plate. The stud is then welded to the first and second plates by friction-welding with the nose welded to the second plate and the periphery of the collar welded to the first plate around the hole.
REFERENCES:
patent: 4256253 (1981-03-01), Nishiwaki
patent: 4735353 (1988-04-01), Thomson et al.
patent: 4850772 (1989-07-01), Jenkins
Gutchess, Jr. Allen D.
TRW Inc.
Wilson Neill R.
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