SITEMA Safety Brakes Animated Simulation

Safety brakes are used to protect personnel and prevent accidents from load-bearing machine-part failures due to a leak or breakdown of a pneumatic pressure system. They immediately activate when the pressure drops. Then they exert the load onto the rod by clamping closed in a self-reinforcing function. They catch falling masses infinitely variable at any position of the stroke.

https://www.ame.com/safety-catchers