Two piece fastener including a pin with undercut pintail

Details Two piece fastener including a pin with undercut pintail Two piece fastener including a pin with undercut pintail

1978-09-13

1980-09-09

Britts, Ramon S.

F16B 1905

Patent

active

042211522

ABSTRACT:
A two part fastener of the lockbolt type is provided in which the pintail portion is provided with a rollback type land immediately adjacent the breakneck groove having a diameter generally no greater than the root diameter of the pull grooves provided thereon. This reduced diameter rollback type land prevents the separated pintail from interfering with operation of the tool jaws during setting of a subsequent fastener so as to enable the length of the pintail to be reduced to a minimum thereby reducing the cost of materials while enabling use of conventional installation tools.

REFERENCES:
patent: 2372222 (1945-03-01), Mullgardt
patent: 2384037 (1945-09-01), Kugler
patent: 2405897 (1946-08-01), Milone et al.
patent: 2428165 (1947-09-01), Ketchum
patent: 2803984 (1957-08-01), Swenson
patent: 3044332 (1962-07-01), Siebol
patent: 3178989 (1965-04-01), Siebol
patent: 3215024 (1965-11-01), Brilmyer et al.
patent: 3425259 (1969-02-01), Baugh
patent: 3460429 (1969-08-01), La Torre
patent: 3483788 (1969-12-01), Keeler
patent: 3880042 (1975-04-01), Binns

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