Anti-terror bollard

摘要

An energy absorbing, retractable security barrier used to stop the movement of vehicles. The device is employed to control access to entranceways, driveways, roads and to secure a security perimeter around buildings and objects requiring such protection. The device consists of a reinforced telescoping bollard inserted into a foundation casing which is imbedded below ground. The device is manually operated and is extended by a self-contained gas-charged spring lift mechanism. The device contains a locking mechanism for securing the telescoping bollard in the extended and retracted positions. When in the retracted position the bollard is flush with the surface and can be traversed by a vehicle. The device is of simple design, easily installed and easily maintained.