When piston 1 is moved upward by the action of fluid delivered to the bottom end of the cylinder, motion is transmitted through rocker arm 2, connected by turning pair B to the piston rod and turning about fixed axis A, and bolt 3 to removable clamp 4 which clamps workpiece 5. Clamp 4 is inserted into holes of workpiece 5 and its slot engages the head of bolt 3. Workpiece 5 is released (after pulling out clamp 4) and rocker arm 2 an piston 1 are returned to the initial position by spring 6.
$3865$LHP,GC$