Blind rivet assembly

Details Blind rivet assembly Blind rivet assembly

1984-02-29

1986-04-08

Dorner, Kenneth J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Bulged by axially contracting ends

411 43, 411 70, F16B 1304

Patent

active

045809364

ABSTRACT:
A blind, self-plugging rivet assembly for securing together two members (42, 43) is of the type comprising a tubular shell (13) with an enlarged head (14) at one end, and a stem (12) which extends through the bore (15) of the shell, the stem having an enlarged head (38) beyond the tail end (18) of the shell.
The shell has a weakened zone (19) formed by three slits (22) extending along part of the shell shank and spaced apart equiangularly around it. The stem head (38) lies beyond the shell tail end, and has an underhead surface (39) which is slightly convex and is bounded by a sharp edge (40).
The stem has a pulling portion (32) connected by a breakneck to a plugging portion (31) which is an interference fit in the shell bore. Adjacent the breakneck the plugging portion has a cylindrical skirt which, when the rivet has been installed, can be deformed outwardly to lock the plugging portion to the shell. A bead on the stem guides the tool for deforming the skirt.

REFERENCES:
patent: 2536353 (1951-01-01), Cooper
patent: 3055255 (1962-09-01), Burrell
patent: 3230818 (1966-01-01), Siebol
patent: 4046053 (1977-09-01), Alvi et al.
patent: 4355934 (1982-10-01), Denham et al.

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