Flush breaking interference fit blind fastener

Details Flush breaking interference fit blind fastener Flush breaking interference fit blind fastener

1990-08-15

1992-08-25

Wilson, Neill R.

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

Having separate expander means

Frangible member

411 69, 411 70, 411339, 4034081, F16B 2100, F16B 1304

Patent

active

051413736

ABSTRACT:
A pull-type blind fastener for installation in aligned bores in juxtaposed workpieces to be joined has a sleeve, a pin through the sleeve, and a barrel on the pin between a pin head and the sleeve. The pin is pulled into the sleeve by an installation tool to expand the sleeve and make an interference fit with the workpieces, the barrel forms a blind side retaining bulb on the sleeve, and a selectively annealed zone on the pin shank elongates to accommodate different workpiece thicknesses within a grip range of the fastener. The annealed zone remains exterior to the workpieces to preserve integrity of the interference fit. The installation force deforms a head on the sleeve into engagement with a stop shoulder on the pin to stop a pin break neck in flush breaking relationship with the head.

REFERENCES:
patent: 3302510 (1967-02-01), Gapp
patent: 3369289 (1968-02-01), Gapp
patent: 4451189 (1984-05-01), Pratt
patent: 4627775 (1986-12-01), Dixon
patent: 4810142 (1989-03-01), Briles
patent: 4826372 (1989-05-01), Kendall

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