F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/18
F16B 19/10 (2006.01)
Patent
CA 1287756
ABSTRACT A breakstem blind rivet comprises a deformable tubular shell 11 of aluminium alloy having a bore 12 inside it. A stem 13 of low-carbon steel is a close fit within the bore, extending along the bore and having a head 14 adjacent the tail end 15 of the shell. The outside of the shell is formed with at least three zones 27, 28, 29 of modified strength spaced apart along its length, these zones being in the form of shallow grooves rolled into the surface. The spacing between each zone 27, 28, 29 and the next progressively decreases as the distance along the shell from the tail end 15 increases. Alternatively the grooves may be formed by a turning process.
557117
Bradley William David
Lacey Raymond Dennis
Avdel Systems Limited
Ridout & Maybee Llp
LandOfFree
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