Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Reexamination Certificate
2006-03-21
2006-03-21
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
C411S399000, C411S911000
Reexamination Certificate
active
07014403
ABSTRACT:
A fastener including a head having a screw driver or wrench engagement feature. The fastener includes a threaded shank extending from the head. A plurality of voids or scores in the shank spaced from but near the head permit rotational torque on the head in one direction significantly greater than rotational torque in an opposite direction so that rotational torque in an opposite direction causes the head to break off from the shank.
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Higganbotham Dale
Tipton Steven M.
Head Johnson & Kachigian
Saether Flemming
The University of Tulsa
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