Self-locking fastener, fastener system, and process

Details Self-locking fastener, fastener system, and process Self-locking fastener, fastener system, and process

1977-11-09

1981-04-07

Staab, Lawrence J.

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

Torque responsive nut or bolt driving connection

Frangible connection

411167, 411176, 411273, 411281, 411416, F16B 3902, F16B 3928

Patent

active

042600057

ABSTRACT:
A collar threads onto a shear pin. When the collar engages a surface of a workpiece, resistance to further threading increases. When sufficient resistance to threading occurs, a setting driver upsets lobes of the collar and forces these lobes radially inward toward the axis of the collar. Material of the collar inside the lobes responds to deformation of the lobes and flows radially inward against the shear pin to lock the collar, shear pin and workpiece together. The driver then rotates freely and a joint has been made with a predetermined clamp-up load and its component parts locked together.

REFERENCES:
patent: 930450 (1909-08-01), Zinow
patent: 1172427 (1916-02-01), Carlson
patent: 2713882 (1955-07-01), Wilkes
patent: 2923339 (1960-02-01), Skidmore
patent: 3464306 (1969-09-01), Reynolds et al.
patent: 3763725 (1973-10-01), Reiland
patent: 3854372 (1974-12-01), Gutshall
patent: 3865007 (1975-02-01), Stanback
patent: 4005740 (1977-02-01), Villo
patent: 4061367 (1977-12-01), Moebius
patent: 4074011 (1978-02-01), Teramae et al.

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