Patent ID: 7418806

Claim:
A frame for supporting an article and comprising; a tubular first frame section extending along a first axis to a first end, a first flange extending laterally from said first frame section and along said first axis to said first end, said first end extending perpendicular to said first axis across said first frame section and said first flange, a tubular second frame section extending along a second axis to a second end, a second flange extending laterally from said second frame section and along said second axis to said second end, said second end extending at an acute angle relative to said second axis across said second frame section and said second flange and defining a retention opening extending into said second end of said second frame section, and a notch in said first flange proximate said first end to define a flange finger disposed between said notch and said first end whereby a retention corner may be formed between said sections by inserting said flange finger into said retention opening of said second end, wherein said notch defines a straight edge perpendicular to said first axis and parallel to said first end.