Electrohydraulic control circuit, for truck anti-submarining barrier, has safety bolts to retain raised barrier in retracted position

摘要

The electrohydraulic control circuit for a folding anti-submarining barrier on a truck has safety bolts to retain the barrier using pneumatic actuating cylinders. The barrier can be lifted into a retracted position by reciprocating cylinders. As the barrier reaches its raised position, it is further pneumatically retained. It is then locked when raised.