Flush head blind fastener

Details Flush head blind fastener Flush head blind fastener

1982-07-12

1985-06-04

Holko, Thomas J.

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

Having separate expander means

Frangible member

411 70, 411542, 411 44, F16B 1304

Patent

active

045211477

ABSTRACT:
A double action blind rivet assembly comprising an outer sleeve member with an annular head flange at one end and having an initial outside diameter such that it is receivable through the holes in the workpieces and a length such that it projects from the blind side of the workpieces for the formation of a blind head therein; an inner sleeve member with an annular head flange at one end and having an outside diameter larger than the inside diameter of the outer sleeve member so that, when the inner sleeve member is driven into the outer sleeve member from the accessible side of the workpieces, it will expand the outer sleeve member into a prescribed interference fit by expanding the holes through the workpieces with the inner sleeve member also having a length such that it projects from the blind side of the workpieces after it is driven into the outer sleeve member; and internally supporting the inner sleeve member while it is being driven into the outer sleeve member with a blind head former section thereon on the blind side of the workpieces and a gripping section projecting out of the sleeve members on the accessible side of the workpieces so that the gripping section can be used to pull the head former section into the sleeve members after the inner sleeve member is driven to form the blind head on the blind side of the workpieces. The method of using the fastener is also disclosed.

REFERENCES:
patent: 1994210 (1935-03-01), Chobert
patent: 2030088 (1936-02-01), Young
patent: 3239036 (1966-03-01), Scott
patent: 3302510 (1967-02-01), Gapp
patent: 3345901 (1967-10-01), Brosseit
patent: 3426375 (1969-02-01), Jeal
patent: 4102030 (1978-07-01), King, Jr.
patent: 4348140 (1982-09-01), Bergholz et al.
patent: 4405256 (1983-09-01), King, Jr.

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