Patent ID: 7677515

Claim:
An adjustable extension arm, comprising: a first channel member having a first end, a second end opposite the first end, and a pair of sidewalls extending from the first end to the second end; a second channel member having a first end, a second end opposite the first end, a pair of sidewalls extending from the first end to the second end; a first endcap having an interior surface and first and second ends, the first end including a plurality of bosses contacting the first and second channel members at the first ends thereof, the bosses of the first endcap providing a clearance between the interior surface of the first endcap and the sidewalls of the first and second channel members; and a second endcap having an interior surface and first and second ends, the first end including a plurality of bosses contacting the first and second channel members at the second ends thereof, the bosses of the second endcap providing the clearance between the interior surface of the second endcap and the sidewalls of the first and second channel members.