When piston 1 is moved to the left by the action of fluid delivered to the right end of the cylinder, wedge 2, mounted rigidly on the end of the piston rod, pushes wedge 3 upward with spherical member 4. This turns lever cams 5 about fixed axes A, clamping workpiece 6 which is located by shoulder a. Cam levers 5 are retracted and the other links are returned to the initial position, releasing the workpiece, by spring 7. Cam levers 5 are conventionally shown in a single plane. Actually, the three levers are equally spaced at 120° to one another.
$3882$LHP,GC$