Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Patent
1981-01-15
1983-10-11
Wolfe, Robert L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
411281, 411 5, F16B 3902
Patent
active
044089368
ABSTRACT:
A torque limited threaded locking fastener and a method for setting it to form an assembly. The fastener comprises an externally threaded shank and an internally threaded collar. At least one convolution of the threads on the shank is non-circular. The collar has a nut section and a drive section. The drive section is shaped to be engaged by a driver. Between these sections there is formed a shear section having the least torque resistance of the sections. The shear section fractures when a predetermined torque is exerted between the two sections. The nut section has an internal thread engageable to the shank thread, and an external rib engageable by a swaging tool. The swaging tool radially inwardly deforms and displaces the rib so as to displace nut section material at the non-circular convolution whereby to lock the nut to the shank after, but only after, the drive section is torqued off. The rib is proportioned and arranged so that the swaging of the rib to a lesser radial dimension does not change the torque level which was applied when the drive section was torqued off.
REFERENCES:
patent: 4040328 (1977-08-01), Moenchinger
patent: 4260005 (1981-04-01), Stencel
Hi-Shear Corporation
Mon Donald D.
Wolfe Robert L.
LandOfFree
Torque-limited threaded locking fastener, and method for setting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Torque-limited threaded locking fastener, and method for setting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torque-limited threaded locking fastener, and method for setting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1272765