FASTENER APPLYING TOOL

The tool of this invention is specifically adapted to apply a novel clamping device or temporary fastener which includes a body having an enlarged head end to engage the near side of work to be clamped, a tension member axially movable in the body and having a gripper head at its forward end to engage the remote side of the work and an aft end projecting from the aft end of the body to be engaged by a puller, and a locking actuator axially movable forward on the body to lock the tension member in clamping position. The tool includes a first barrel to surround the fastener body and engage the head end to push it against the work, a second barrel slidable in the first barrel to move the actuator, and a puller slidable in the second barrel to retract the tension member. The forward end of the puller has a gripping jaw to engage the tension member. A first reaction member in the form of a cylinder pushes solidly against the second barrel which pushes yieldingly through a spring against the first barrel. A second reaction member in the form of a piston retracts the puller under fluid pressure. The force applied first retracts the puller until a predetermined clamping load is achieved, and then forces the second barrel forward with respect to the first barrel to contact the actuator and lock the clamping device.