Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1987-11-09
1989-08-22
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 44, 411 70, 411501, 411908, F16B 1304
Patent
active
048591289
ABSTRACT:
A composite blind rivet wherein a ductile metallic sheath fully covers the blind head forming portion of the rivet before and after deformation thereof so as to preclude protrustion of said fibers upon formation of said blind head. The sheath is initially expanded radially along a thin-walled portion thereof during blind head formation by the hydrostatic pressure generated by axial compression of the rivet's composite core, whereafter axial compression of the sheath supplants the hydrostatic core pressure to radially outwardly buckle the sheath into a blind head preferably of frusto-conical cross-section. Subsequent to blind head formation, the sheath elastically maintains a radially inward bias on the rivet's composite core while elastically axially biasing the anvil from the workpieces, whereby clamp-up force is maintained notwithstanding nominal plastic cold flow of the rivet's composite core during use.
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patent: 4451189 (1984-05-01), Pratt
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patent: 4478544 (1984-10-01), Strand
patent: 4718801 (1988-01-01), Berecz
Brecz Imre
Hinton Dennis L.
Schultz Dennis
Dino Suzanne L.
Lyon Lyman R.
Microdot Inc.
Smith Gary L.
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