Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Patent
1978-08-14
1981-09-22
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
252 56S, 411368, 411903, F16B 3102
Patent
active
042903378
ABSTRACT:
A fastener set comprising a bolt body, a nut and a washer which are fitted onto the bolt body. Said bolt body has a notched portion which can be broken by a predetermined torsional force. Said nut is coated by a composition containing a ester obtained by only partial esterification of a polyol having not more than twelve carbon atoms and a fatty acid or an oxy-acid. The reaction force resulted from a fastening torque applied to the nut is transmitted to the bolt body so as to break off from the bolt body a surplus portion extending above the notched portion.
REFERENCES:
patent: 2928302 (1960-03-01), Owen et al.
patent: 3138987 (1964-06-01), Wing
patent: 3144803 (1964-08-01), Briles
patent: 3181413 (1965-05-01), Wing
patent: 3244625 (1966-04-01), Silwones
patent: 4025447 (1977-05-01), Mancini et al.
patent: 4031019 (1977-06-01), Bell
Kuwata Takeo
Shimada Shoji
Usa Mikio
Britts Ramon S.
Nittetsu Bolten Kabushiki Kaisha
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