Patent ID: 7549260

Claim:
A grille comprising: a plurality of first bars extending in a first direction; a plurality of second bars extending in a second direction and crossing said first bars at intersections; said first bars each including a crenellated edge having a plurality of alternating recesses and projections; said second bars being nested in said recesses of said first bars at said intersections, and said projections being sandwiched between said second bars between said intersections; said grille being characterized by: each said first bar including a first locking opening extending lengthwise within said first bar, at least a part of said first locking opening extending through said projections; each said second bar being generally solid except for a plurality of second locking openings and a plurality of notches, with said second locking openings and said notches each extending transversely through said second bar; said first and second locking openings being aligned when said second bars are nested in said recesses of said first bars; and locking members extending through said first and second locking openings to interlock said first and second bars.