Workpiece 3 is located with its hole on shoulder a and is clamped by two levers 2 which turn about fixed axes A. When piston 1 is moved to the left by the action of fluid delivered to the right end of the cylinder, motion is transmitted through spherical washer 4 to levers 2. The workpiece is released and levers 2 are retracted to allow it to be removed when piston 1 is moved to the right by spring 5.
$3864$LHP,GC$