When fluid is delivered into the upper ends of cylinders 1 and 2, and into the left end of cyllinder 3, rods 4 an 5 clamp workpieces 7 by means of strap clamps 6 and 9. Rod 8 clamps a workpiece directly. The workpieces are clamped in two perpendicular planes. The workpieces are released, rods 4 and 5, strap clamps 6 and 9, and the pistons are raised by springs 11 and 10. Rod 8 and its piston are retracted by spring 12.
$3868$LHP,GC$