Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection
Patent
1987-11-16
1988-11-15
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
411427, 411335, 411414, 411281, 411437, F16B 3100
Patent
active
047845490
ABSTRACT:
Axially-extending troughs in a bark of an internally-threaded collar receive setting balls of a driver that apply a torque to the collar through the balls bearing on the walls of the troughs. At a predetermined pre-load, the balls fail the bark and plow through it to develop circumferential furrows, and the torque application on the collar ends. A second torquing with balls at a different axial position fails the bark again at the same pre-load to compensate for any relaxation after the first torque application.
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American Machinist/Metalworking Manufacturing, World Screw Thread Forms, Jun. 12, 1961, pp. 129, 93, 95.
Brueske Curtis B.
Smith Gary L.
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