When piston 1 is moved forward by the action of fluid delivered to the end of its cylinder, gear rack 2, rigidly attached to the piston rod, turns pinion 3 and shaft A. This turns eccentrics 4, mounted on shaft A, actuating straps 6 which clamp workpiece 5. In order to clamp the workpiece simultaneously with two eccentrics, bolts 7 are provided as supports on which straps 6 can tilt. These bolts are interlocked through crosspiece 8 which can turn about fixed axis D.
$4023$THP,GC$