Workpiece 3, located by shoulder a, is clamped by its external flange with two clamping members 2 having slots for the rounded ends of rocker arm 4. Rocker arm 4 is connected by turning pair A to rod 5 of piston 1. When piston 1 is moved to the right by the action of fluid delivered to the left end of the cylinder, workpiece 3 is clamped aigainst the locating end face. The workpiece is released and clamping members 2 are turned to allow it to be removed when piston 1 is moved to the left by spring 6.
$3866$LHP,GC$