Lightweight bar for deploying row of spikes across road

摘要: The apparatus consists of spikes (8) on a bar which can be deployed across road to puncture the tyres vehicle passing over it. is in form series links (7) attached flexible belt (9) unrolled by motor (3) rotating screw (4) nut (5). In variants, lever mechanism or flat housing with rotatable spikes, and drive incorporate gears, endless screws, racks, cams, cylinders, cables, belts chains.