Abstract: A pneumatic driver for driving a fastener including an air inlet connectable to an air supply and a pneumatically driven motor driveable by air supply about a tool axis. The driver further including a bit holder, a torque control, and a push rod in mechanical communication with the torque control such that the pin is axially positionable between an off position, a drive position and a torque blocked position. The rod moving to the drive position in response to axial pressure being applied to the bit holder and driver further including an inlet air chamber and a signal pressure chamber fluidly connecting the air inlet and the motor. The driver further including a port between the inlet and signal chambers and a second port between the pressure chamber and the motor and the rod extending through the pressure chamber into the inlet chamber and including a first seal for selectively sealing the first port and a second seal for selectively sealing the second port.

Abstract: This assembly is a torque measuring device that measures the torque output a tool is producing. A hollow torsion tube connects the tool to a reaction arm through the assembly. A torque transducer is attached to the side of the torsion tube. The ends of the torque transducer are attached in a way that transfers the torque output of the tool to the torsion tube. The transducer produces an electrical signal directly proportional to the amount of twisting that occurs in the torsion tube and transducer. A handle also is attached to the torsion tube in a way that allows the handle to rotate 360° around the torsion tube. Since the operator holds the handle instead of the tool, the operators influence on the tool's torque output is removed, increasing the accuracy of the device.