Method and apparatus for manufacturing a stop and lock shoulder

Details Method and apparatus for manufacturing a stop and lock shoulder Method and apparatus for manufacturing a stop and lock shoulder

1982-09-30

1984-10-02

Combs, Ervin M.

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

Impact driven fastener, e.g., nail, spike, tack, etc.

Including integral locking means

10 27R, 411 43, 411 45, 411 70, B21K 158

Patent

active

044739141

ABSTRACT:
A method and apparatus for forming a hollow sleeve for a blind fastener including the steps of forming a sleeve blank to have an enlarged sleeve head and a through bore having a radially inwardly extending shoulder forming portion, deforming the material on the shoulder forming portion to move axially toward the sleeve head and radially inwardly from the reduced diameter bore portion and substantially deforming the material away from the sleeve head and back towards the contour of the reduced diameter bore portion to form a sleeve stop shoulder.

REFERENCES:
patent: 2538623 (1951-01-01), Keating
patent: 3073205 (1963-01-01), Siebol
patent: 3288016 (1966-11-01), Reynolds
patent: 3292482 (1966-12-01), Fry et al.
patent: 3501790 (1970-03-01), Wickers
patent: 4046053 (1977-09-01), Alvi et al.

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