|7025526||Portable traffic control device|
A portable traffic control device having a housing, two generally parallel and independently rotatable shafts beyond extending the housing length, and a plurality of blades connected to each shaft. Each shaft rotates such that the blades on that shaft either protrud...
A barrier is fixed on a wall or other perimeter structure by way of support posts. The barrier has a support shaft along which a number of rotatable units are mounted. Each rotatable unit is formed from two interengaged elements, each element having been ...