US Patent 8226322 Traffic barrier pop-up bollard system

Disclosed is a self-contained, pop-up bollard barrier system (10) that is capable of working from a single electromechanical actuator (29) with a series of belts (30) and pulleys (38, 38A). The system (10) is built in two parts that once the foundation vault (44) is in place, the internal apparatus or bollard assembly (11) can be removed as a unit for maintenance or can be completely replaced with another assembly to have a brand new barrier without the need of replacing or moving any of the initial foundation. The system (10) enhances the ability of the contractor on site to have a self contained product that only needs wiring and requires no grease while minimizing the installation cost, which is passed on to the end user.