Lockbolt joint and method of making a lockbolt joint

Details Lockbolt joint and method of making a lockbolt joint Lockbolt joint and method of making a lockbolt joint

1978-08-23

1980-04-15

Britts, Ramon S.

29506, F16B 1902

Patent

active

041977823

ABSTRACT:
A lockbolt collar configured to reduce the longitudinal tension in a lockbolt which otherwise has the effect of reducing its cross section, and hence the tightness of its fit where it passes through the secured parts, the longitudinal tension being caused by the swaging of the collar onto the lockbolt. An external taper of the collar toward its end adjacent the secured parts commencing at a location intermediate its ends provides a spatial cavity within the swaging die of sufficient size to receive collar material displaced during swaging and thereby significantly reduce the reverse flow of such collar material causing such longitudinal tension in the lockbolt.

REFERENCES:
patent: 2542376 (1951-02-01), Torresen
patent: 2804798 (1957-09-01), Brilmyer
patent: 3094017 (1963-06-01), Champoux et al.
patent: 3371572 (1968-03-01), King

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