Security bollard

Abstract

The present invention relates to a a security bollard and, in particular, to a security bollard designed to be used as a protective measure to be placed in front of shop fronts and Automatic Teller Machines (ATMs) that may be subjected to ramming by vehicles. The bollard includes a first upright hollow member having an outer wall defining a chamber, and a plurality of vertical longitudinal jamming rods disposed inside the chamber. Each jamming rod has associated therewith a biasing means for biasing the members in a longitudinal direction so as to act like a disk brake on cutting implements attempting to cut through the jamming rods, and to also dose the gap created by the cut should the cutting implement be retrieved and cutting attempted again.

1 - 20 . (canceled) 
     
     
         21 . A security bollard characterised by:
 an upright hollow member having an outer wall defining a chamber;   a vertical jamming member disposed inside said chamber;   a biasing means associated with the vertical jamming member, the biasing means adapted to bias the vertical jamming member in a longitudinal direction so that as the vertical jamming member is cut through causing a gap, the biasing means causes the gap to be closed; and   a material filling the rest of the chamber.   
     
     
         22 . A security bollard as characterised in  claim 21  wherein there are a plurality of vertical jamming members disposed within the upright hollow member, each of the vertical jamming members having a biasing means 
     
     
         23 . A security bollard as in  claim 22  wherein the vertical jamming members are arranged circumferentially and symmetrically within the chamber. 
     
     
         24 . A security bollard as in  claim 21  wherein the vertical jamming member is made from metal. 
     
     
         25 . A security bollard as characterised in  claim 21  wherein the first upright hollow member is made from steel. 
     
     
         26 . A security bollard as characterised in  claim 22  wherein the bottom end of the bollard is embedded in a ground cavity, and each of the biasing means is in the form of a spring disposed below a ground surface inside the chamber, the spring adapted to provide an upwards pressure on each vertical jamming member. 
     
     
         27 . A security bollard as characterised in  claim 22  wherein the bollard includes a cap at an upper end thereof, and each of the vertical jamming members abuts at an upper end of the cap. 
     
     
         28 . A security bollard as characterised in  claim 21  wherein the material is strong in compression. 
     
     
         29 . A security bollard as characterised in  claim 28  wherein the material is concrete. 
     
     
         30 . A security bollard as characterised in  claim 28  wherein said material is a heat resistant resin mixture. 
     
     
         31 . A security bollard as characterised in  claim 21  wherein the bottom end of the bollard is embedded in a ground cavity, said bollard including a horizontal member disposed at the bottom end of said bollard, and said ground cavity including a locking mechanism adapted to engage said horizontal member and lock said bollard inside said cavity, said locking mechanism including engaging arms moveable between a first locked position in which said arms prevent vertical movement of the bollard, and a second position in which the bollard is vertically moveable. 
     
     
         32 . A security bollard as characterised in  claim 31  wherein said arms are moveable between the first and second positions using an operating lever which is accessible from an exterior of said bollard and an associated rod which connects the operating lever to the arms such that said arms are caused to rotate between the first and second positions when the operating lever is moved between an upper and a lower position. 
     
     
         33 . A security bollard characterised by:
 an upright hollow member having an outer wall defining a chamber;   a bar centrally disposed inside the upright hollow member;   filling material disposed between the space defined by the outer wall and the bar and being strong in compression; and   a biasing means associated with the filling material, the biasing means adapted to bias the filling material in a longitudinal direction.   
     
     
         34 . A security bollard characterised by:
 an upright hollow member having an outer wall defining a chamber;   a bar centrally disposed inside the first upright hollow member;   a plurality of vertically extending jamming bars disposed between the outer wall and the bar; and   a biasing means associated with each of the jamming bars, the biasing means adapted to bias the jamming bars in a longitudinal direction.