Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1992-12-09
1993-10-12
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 70, 4034081, 295252, F16B 1304, F16B 1306, B23P 1102
Patent
active
052520145
ABSTRACT:
A blind fastener designed to secure workpieces having aligned holes therein is provided. The fastener comprises an elongated stem having a head at one end and a serrated tail at the other, and a tubular sleeve having a head through which tail of the stem extends and a tail which is engaged by the head of the stem. The stem further includes a shear ring for bulbing the sleeve tail and a lock ring for locking the stem to the sleeve. The stem also has a neck which engages a reduced diameter shoulder portion in the sleeve. Interference between the neck and the shoulder causes the sleeve to expand radially outward so as to fill any clearance or gap between the sleeve and the workpieces. A reservoir located in the stem accepts excess shoulder material sheared off during the hole filling process, the excess material also serving to form a secondary lock.
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patent: 5131107 (1992-07-01), Pratt et al.
Textron Inc.
Wilson Neill R.
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