Patent ID: 7581351

Claim:
A speed barrier comprising: a left column; a right column; a barrier configured to survive a main impact of a vehicle attempting to ram through the speed barrier and movable between a stowed barrier position and a deployed barrier position, wherein in the deployed barrier position, the barrier resides vertically at a lower column position and is supported by the columns; and a gate movable vertically between a stowed gate position and a deployed gate position, wherein: the gate includes mid-rollers attached to the gate between an upper end of the gate and a lower end of the gate, the columns include vertical tracks, and the mid-rollers translate along the vertical tracks when the gate moves between the stowed gate position and the deployed gate position; the gate includes bottom rollers proximal to the lower end of the gate, the columns further include diagonal tracks, and the bottom rollers translate along the diagonal tracks when the gate moves between the stowed gate position and the deployed gate position; the barrier includes barrier pulleys proximal to a top end of the barrier, cables are attached to the gate proximal to the mid-rollers, the cables extend downward and wrap around the barrier pulleys, and then extend upwards and attach to a fixed point on each column, and vertical motion of the mid-rollers results in the cable lifting the barrier one half the vertical distance the mid-rollers move, and in the deployed gate position the gate resides vertically at an upper column position above the barrier and is supported by the columns.