Patent ID: 7165924

Claim:
A self-locking bolt assembly comprising: (a) a bolt including a threaded shank, an axial bore extending through the shank, the bore including a threaded bore section, a tapered section, a threadless bore midsection between the threaded bore section and the tapered section; (b) a screw set pin including a screw section having threads for engaging the threaded bore section and a threadless pin shaft having a tapered end section for engaging the tapered end section of the bore, the pin shaft having a proximal end attached to the screw section, the pin shaft being sufficiently long to ensure that when the tapered end section engages the tapered section of the bore the screw set pin then can be screwed a predetermined distance further into the bore without galling the threads of the screw section and the threaded bore section; and (c) the tapered end section of the pin shaft having a taper angle that is less than the taper angle of the tapered section of the bore to allow a narrowed end of the tapered end section of the pin shaft to engage the tapered section of the bore.