Patent ID: 6908271

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 end section, and a bore midsection between the threaded bore section and the tapered end section; (b) a screw set pin including a screw section having threads for engaging the threaded bore section and a 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 distal end section engages the tapered end section of the bore the screw set pin then can be screwed a predetermined distance further into the bore without galling threads of the screw section and the threaded bore section; (c) said tapered end section of the pin shaft having a taper angle that is less than a taper angle of the tapered end section of the bore to allow a narrowed end portion of the tapered end section of the pin shaft to engage a narrowed end portion of the tapered end section of the bore; and (d) the distal end of the pin shaft having a larger diameter than the reduced diameter end section of the bore such that its periphery is adapted to engage the tapered end section of the bore.