摘要 |
<p>A rat barrier has been located in a drain pipe 1 in order to deny access to rodents such as rats seeking entrance to a dwelling or similar buildings. The barrier comprises a framework 5 fixed in a pipe joint and from which a wire cone 6 extends, which narrows in the flow direction of the drainage water. The acute angle of the cone varies with the pipe diameter, and the length and the thickness of the wires or the rods forming the cone 6 vary correspondingly. <IMAGE></p> |