Patent ID: 7901156
Filing Date: 2011-03-08
Classification: E01F

Abstract:
1. A bollard, comprising: a base plate having a top surface, a bottom surface on a side of the base plate opposite the top surface, and a plurality of edges defining a perimeter of the base plate: a resilient core rod having a proximal end, a distal end, and a middle portion therebetween, the resilient core rod extending from the top surface of the base plate at the proximal end to the distal end; a load ring disposed at or near the distal end of the resilient core rod, the load ring having a larger outer perimeter than an outer perimeter of the resilient core rod; a hollow impact shell disposed to surround the resilient core rod and the load ring, the hollow impact shell having an interior surface and an exterior surface and being free to move relative to the load ring; and a gap between the resilient core rod and the interior surface of the impact shell; wherein the impact shell is configured to receive an impact force and transfer the impact force to the load ring through contact with the load ring without the impact shell directly transferring the impact force to the middle portion or the proximal end of the resilient core rod, and the load ring is configured to transfer the impact force received from the impact shell to the distal end of the resilient core rod, flexing the resilient core rod.