Sheathed composite blind rivet

Details Sheathed composite blind rivet Sheathed composite blind rivet

F - Mech Eng,Light,Heat,Weapons

16

B

85/18

F16B 19/10 (2006.01) F16B 19/04 (2006.01)

Patent

CA 1303393

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 protrusion 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 outward buckle the sheath into a blind head preferably having 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.

571675

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