Fastener retention with improved fatigue life

Details Fastener retention with improved fatigue life Fastener retention with improved fatigue life

1983-12-20

1985-12-10

Wolfe, Robert L.

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

Threaded fastener locked to a discreet structure

Member preassembled with substructure at through-passage or...

411180, F16B 3704

Patent

active

045576505

ABSTRACT:
This invention provides improved fatigue life for a fastener having a sleeve associated with a basket and extending through an opening in a workpiece. The sleeve has curved lobes that penetrate the workpiece to prevent rotation, the lobes having inclined leading edges, and inclined abutment surfaces at the inner ends of their roots that compress the displaced material of the workpiece around the entrance to the opening.

REFERENCES:
patent: Re27143 (1971-06-01), Breed et al.
patent: 1686468 (1923-12-01), Rosenberg
patent: 1765614 (1928-01-01), Roberts et al.
patent: 2307080 (1943-01-01), Schaefer
patent: 2490594 (1943-07-01), Madden
patent: 3079970 (1963-03-01), Barry
patent: 3174523 (1965-03-01), Hult
patent: 3399705 (1968-09-01), Breed et al.
patent: 3695324 (1972-10-01), Gulistan
patent: 4012884 (1977-03-01), Pagel
patent: 4046181 (1977-09-01), Barnsdale
patent: 4097168 (1978-06-01), Pagel
patent: 4186787 (1980-02-01), Husain
patent: 4227561 (1980-10-01), Molina
"We Broke a Dozen Screws, but we couldn't Make this Sheet Metal Insert Spin in its Hole!" 3/1963, Southco/Lion.

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