| 摘要 |
A blind fastener with an improved drive nut and assembly process. The blind fastener of the present invention includes a screw, a sleeve, a nut, and a drive nut. The new drive nut of this invention has protruding nibs that mate precisely with a driving recess located in the nut head. The protruding nibs of the new drive nut are not deformable and serve to replace the deformable annular ridge that was used in previous drive nut assemblies. The configuration of the protruding nibs and the recess in the nut head can be of many forms, so long as both parts are capable of being mated. Once the new assembly process for the blind fastener has been completed, the drive nut will have been mated with the nut head to prevent any rotation of the nut during installation of the blind fastener. The assembly process will now include placing the sleeve over the threads of the screw to a position adjacent the screw head. The nut is then partially threaded onto the screw until the internal threads within the region of the enlarged nut head have not been completely threaded onto the screw. The drive nut's protruding nibs are next aligned and physically engaged into the driving recess of the nut head. The mated drive nut and nut are next rotated which results in the drive nut and nut being threaded onto the screw as a single unit and, therefore physically locked together. |
