초록 ▼

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 telescopi

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.

대표청구항 ▼

[ We claim:] [1.] A security barrier to protect/block entranceways and provide a security perimeter against attacks comprising:a foundation casing member, the casing member adapted to be installed below grade;a bollard member telescopically positioned in relation to the casing member, the bollard me

[ We claim:] [1.] A security barrier to protect/block entranceways and provide a security perimeter against attacks comprising:a foundation casing member, the casing member adapted to be installed below grade;a bollard member telescopically positioned in relation to the casing member, the bollard member being retractable and extendible with respect to the casing member,the bollard member being reinforced to resist collapse and increase the absorption of kinetic energy; anda lift element comprising at least two gas charged spring members affixed between the casing member and the bollard member, the gas charged spring member being able provide lift assistance between the casing member and the bollard member.