Arm apparatus for mounting electronic devices

A lower channel for use in an extension arm that adjustably mounts a device to a support mount, said lower channel comprising a U-shaped body having first and second ends, said body including a pair of spaced apart sidewalls each having an outer surface and a bottom wall, a first roller at the first end of said body and a second roller at the second end of said body, said first roller having spaced apart ends adjacent said surface of said sidewalls, said first roller between said sidewalls including a pair of spaced apart roller walls extending transversely between said sidewalls, said spaced apart roller walls forming an opening therebeteween and each roller wall having an upper edge, wherein said upper edge of said roller walls from said bottom wall being less than the height of said ends of said first roller from said bottom wall, and wherein said pair of spaced apart roller walls are integrally attached to both said sidewalls and said bottom wall.

The combination of an upper channel and a lower channel for use in an extension arm that adjustably mounts a device to a supporting mount, said combination comprising an upper channel including a U-shaped upper body having first and second ends, said upper body including a pair of spaced apart sidewalls each having an outer surface and a bottom wall, a first roller at the first end of said upper body and a second roller at the second end of said upper body, said first roller having spaced apart ends adjacent said outer surface of said sidewalls, said first roller between said sidewalls including a pair of spaced apart roller walls extending between said sidewalls, said spaced apart roller walls forming an opening therebetween and each roller wall having an upper edge, wherein said upper edge said roller walls from said bottom wall being less than the height of said ends of said first roller from said bottom wall and a lower channel including a U-shaped lower body having first and second ends, said lower body including a pair of spaced apart sidewalls and a bottom wall, a third roller at the first end of said lower body and a fourth roller at the second end of said body, wherein said upper and lower body and said respective rollers are integrally cast.

An upper channel for use in an extension arm that adjustably mounts a device to a support mount, said upper channel comprising a U-shaped body having first and second ends, said body including a pair of spaced apart sidewalls each having an outer surface and a bottom wall, a first roller at the first end of said body and a second roller at the second end of said body, said first roller having spaced apart ends adjacent said outer surface of said sidewalls, wherein said first roller is non-rotatable, said first roller between said sidewalls including a pair of spaced apart roller walls extending transversely between said sidewalls, said spaced apart roller walls forming an opening therebeteween and each roller wall having an upper edge, wherein said upper edge of said roller walls from said bottom wall being less than the height of said ends of said first roller from said bottom wall.

A lower channel for use in an extension arm that adjustably mounts a device to a support mount, said lower channel comprising a U-shaped body having first and second ends, said body including a pair of spaced apart sidewalls each having an outer surface and a bottom wall, a first roller at the first end of said body and a second roller at the second end of said body, said first roller having spaced apart ends adjacent said outer surface of said sidewalls, wherein said first roller is non-rotatable, said first roller between said sidewalls including a pair of spaced apart roller walls extending transversely between said sidewalls, said spaced apart roller walls forming an opening therebeteween and each roller wall having an upper edge, wherein said upper edge of said roller walls from said bottom wall being less than the height of said ends of said first roller from said bottom wall.

A channel for use in an extension arm that adjustably mounts a device to a support mount, said channel comprising a U-shaped body having first and second ends, said body including a pair of spaced apart sidewalls each having an outer surface and a bottom wall, a first roller at the first end of said body and a second roller at the second end of said body, said first roller having spaced apart circular ends adjacent said outer surface of said sidewalls, said first roller between said sidewalls including a pair of spaced apart walls extending transversely therebetween, wherein the height of said walls between said sidewalls is less than the height of said ends of said first roller from said bottom wall, and wherein said first and second rollers are integrally formed with said U-shaped body.