Patent ID: 7641179

Claim:
A tamper-resistant fence, the fence comprising: a first end post and second end post; a top rail and a bottom rail fixedly coupled to the first and second end posts; a middle post arranged between the first and second end posts, wherein the middle post is arranged to support the top rail; fence fabric arranged between the first and second end posts, wherein the fence fabric is metal wire that is woven to form a matrix of openings defining a plurality of diagonally left-leaning concave channels and a plurality of diagonally right-leaning concave channels; and a tamper-resistant grid, comprising: a first set of metal tamper-resistant inserts, wherein each of the first set of tamper-resistant inserts is arranged diagonally in alignment with one of the right-leaning concave channels on a first side of the fence fabric, wherein at least one right-leaning concave channel of the fence fabric that does not have a tamper-resistant insert arranged therein is interposed between adjacent members of the first set of tamper-resistant inserts; and a second set of metal tamper-resistant inserts, wherein each of the second set of tamper-resistant inserts is arranged diagonally in alignment with one of the left-leaning concave channels on a second side of the fence fabric, wherein at least one left-leaning concave channel of the fence fabric that does not have a tamper-resistant insert arranged therein is interposed between adjacent members of the second set of tamper-resistant inserts; wherein each of the second set of tamper-resistant inserts intersects and is fixedly coupled to at least one of the first set of tamper-resistant inserts; wherein a plurality of the second set of tamper-resistant inserts each intersect and are fixedly coupled to at least one of the first set of tamper-resistant inserts below the top rail; wherein a plurality of the first set of tamper-resistant inserts each comprise an upper end which intersects and is fixedly coupled to a respective upper end of one of the second set of tamper-resistant inserts above the top rail; wherein members of the first and second set of tamper-resistant inserts intersect to form openings in the grid which are smaller than a size that a human can traverse; and wherein ends of a plurality of the first and second set of tamper-resistant inserts are fixedly coupled to the first and second end posts such that opposing sides of the grid are fixedly coupled to the first and second end posts.