Maximum tensile force limit visualizing device for tightening rod, has force limit indicator deformed with amplitude of order of centimeter for relative displacement between rings of order of millimeter, when preset force is reached

摘要

The device has a force limit indicator (3) between male and female rings (1, 2) sliding a tightening rod (6) provided with a stop (4) supporting on an outer surface of the ring (1). Outer surface of the ring (2) supports on an outer surface of a formwork (5). The indicator is deformed with an amplitude of an order of centimeter for a relative displacement between the rings of an order of millimeter, when a preset force is reached.