Patent ID: 7308842

Claim:
A blind fastener in combination with an installation tool, the blind fastener for securing a plurality of workpieces together in response to a relative rotational force applied to the blind fastener, the workpieces having an accessible side workpiece and a blind side workpiece, the combination comprising: a generally tubular sleeve received within openings in the workpieces, the sleeve having a rearward tapered end at one end of the sleeve that projects rearwardly beyond the blind side workpiece, an enlarged body head at another end of the sleeve for engagement with an outer surface of the accessible side workpiece and an internally smooth portion between the tapered end and the head, the head having a generally smooth exterior surface with a plurality of rearwardly sloping recesses disposed in the generally smooth exterior surface in the head of the sleeve; a pin member having an elongated shank, the shank having a straight smooth portion received within the smooth portion of the sleeve and a threaded portion at one end of the pin member projecting rearwardly beyond the blind side workpiece, the pin member having a first head adjacent to the shank that is seated within the sleeve and a second splined head adjacent to the first head, the pin member having a breakneck groove between the first head and the second head, the breakneck groove being adapted to fracture in torsional shear in response to the relative rotational force applied to the fastener with a splined driver engaging the second splined head during actuation of the installation tool; and a nut body having an internally threaded bore at one end of the nut body threadedly engaged with the threads of the pin member and another end of the nut body made of a deformable material which is located adjacent to the rearward tapered end of the sleeve, wherein the installation tool has a plurality of rearwardly sloping nibs disposed on one end of a nose, wherein the nibs engage the recesses disposed in the head of the sleeve, do not cam out of the recesses and hold the sleeve stationary during actuation of the installation tool, wherein the driver facilitates threading of the threads of the pin member with the threads of the nut body during actuation of the installation tool to deform the other end of the nut body into a bulb to secure the plurality of workpieces together by pulling the nut body over the rearward tapered end of the sleeve into engagement with the blind side workpiece.