Patent ID: 8152406
Filing Date: 2012-04-10
Classification: E01F

Abstract:
1. A crash barrier system comprising: a hydraulic actuator driven piston having a first end structurally connected to a crash barrier and a second end that is a movable compartment wall between a first variable volume fluid compartment having a first fluid port and an associated first fluid line, and a second variable volume fluid compartment having a second fluid port and an associated second fluid line; a hydraulic fluid reservoir; a hydraulic pump in fluid communication with the hydraulic fluid reservoir and a pressurized fluid delivery line; a hydraulic fluid drain line in fluid communication with the hydraulic fluid reservoir; a directional control valve sub-system constructed and arranged in fluid paths between a crash emergency barrier rise sub-system in selective fluid communication with the second fluid line via an accumulator line, the crash emergency barrier rise sub-system including a programmable logic controller in electronic communication with the directional control valve sub-system, the hydraulic pump and the emergency-UP solenoid valve; and an external accumulator relief valve in fluid communication with the emergency hydraulic fluid line having a first port connected to a side of the emergency hydraulic fluid line with the pneumatic container, a second port connected to a side of the emergency hydraulic fluid line with the emergency-UP solenoid check valve, and a third port for release of excess pressure.