Formation of threaded elements having a self-locking action

Details Formation of threaded elements having a self-locking action Formation of threaded elements having a self-locking action

B - Operations, Transporting

05

D

10/22

B05D 7/22 (2006.01)

Patent

CA 1217609

FORMATION OF THREADED ELEMENTS HAVING SELF-LOCKING ACTION Abstract of the Disclosure A fatigue resistant self-locking fastener is formed by screwing two threaded elements into engagement with a part having a thread which is slightly off-size with re- spect to the threads of those elements, locating the two elements just in contact with one another while in engage- ment with said part but without tightening them against one another sufficiently to develop any substantial stress in the threads, and then securing the elements together in that relative position, preferably by welding. Because of the off-size relationship of the locating part, the threads of the two elements when so located by the part are aligned axially with one another but are turned relative to one another about their common axis to positions in which the thread of one part is not precisely a true helical continuation of the thread of the other part, so that the two threads when subsequently screwed into engagement with a single coacting threaded element will have an interfering fit therewith attaining a self-locking action and improving resistance to fatigue and tensile failures.

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