Fatigue performance collars and lockbolt construction

Details Fatigue performance collars and lockbolt construction Fatigue performance collars and lockbolt construction

1978-03-24

1980-04-22

Holko, Thomas J.

F16B 2100

Patent

active

041988957

ABSTRACT:
An aircraft fastener element, as a collar or nut, designed and constructed to produce improved fatigue performance in low shear transfer joints. The improved collar or nut has a bearing surface which abuts against the adjacent surface of the workpiece aperture in an initial predetermined area so that when the collar is swaged or the nut tightened and compressed the initial annular base is flattened to no more than approximately 1.25 D (D being the internal diameter of the nut or collar).

REFERENCES:
patent: 2531049 (1950-11-01), Huck
patent: 2955505 (1960-10-01), Schuster
patent: 3057246 (1962-10-01), Brilmyer
patent: 3094017 (1963-06-01), Chapoux et al.
patent: 3203300 (1965-08-01), Marschner
patent: 3421562 (1969-01-01), Orloff et al.
patent: 3560124 (1971-02-01), Bergere
patent: 3792933 (1974-02-01), Stencel

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