Patent ID: 6983917

Claim:
A channel assembly for use in an extension arm adapted for mounting an electronic device to a support, said assembly comprising an integrally cast upper channel including an integrally cast elongated first body having a pair of spaced apart sidewalls and first and second ends, said first body having an integrally cast first roller at said first end of said first body extending between said sidewalls and an integrally cast second roller at said second end of said first body extending between said sidewalls, wherein said first and second rollers are integrally cast with said first body forming said upper channel, said first roller configured to be pivotably attached to a first end cap and said second roller configured to be pivotably attached to a second end cap; and an integrally cast lower channel including an integrally cast elongated second body having a pair of spaced apart sidewalls and first and second ends, said second body having an integrally cast third roller at said first end of said second body extending between said sidewalls and an integrally cast fourth roller at said second end of said second body extending between said sidewalls, wherein said third and fourth rollers are integrally cast with said second body forming said lower channel, said third roller configured to be pivotably attached to the first end cap and said fourth roller configured to be pivotably attached to the second end cap, wherein said upper channel and said lower channel are nested together; wherein at least one of said first, second, third and fourth rollers has a portion thereof deleted therefrom between said spaced apart sidewalls.