Blind rivets and method for its manufacture

Details Blind rivets and method for its manufacture Blind rivets and method for its manufacture

1994-12-08

1996-03-05

Wilson, Neill R.

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

Having separate expander means

Frangible member

411 34, 411 70, 470 30, F16B 1304, F16B 1306, B21K 144

Patent

active

054961408

ABSTRACT:
A blind rivet includes a mandrel shaft having a head disposed at one axial end. A hollow rivet shell has a cylindrical shape including an inner cylindrical surface and an outer cylindrical surface. The rivet shell surrounds the mandrel shaft. The outer cylindrical surface has at least one attenuation groove, which includes at least two recesses. Each recess has a bottom surface that substantially forms a secant with respect to the outer cylindrical surface. A method of manufacturing a blind rivet comprises the steps of placing a mandrel shaft having a head within a hollow rivet shell, producing at least one attenuation groove in an outer cylindrical surface of the rivet shell after the placing step so that at least two recesses are formed. Each of the recesses has a bottom surface that substantially forms a secant with respect to the outer cylindrical surface.

REFERENCES:
patent: 3451303 (1969-06-01), Biermann
patent: 3553040 (1971-01-01), Bell
patent: 4696610 (1987-09-01), Wright
patent: 4988247 (1991-01-01), Summerlin
patent: 5248231 (1993-09-01), Denham et al.

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