Arm apparatus for mounting electronic devices with cable management system

A reinforced channel for use in an extension arm that mounts a device to a support, said channel comprising a U-shaped body having first and second spaced apart ends, said body including a pair of spaced apart sidewalls and a bottom wall therebetween;

• a first roller at said first end of said body and a second roller at said second end of said body;
• and a rib assembly within said body between said sidewalls overlying said bottom wall, said rib assembly comprising a plurality of first ribs projecting upwardly from said bottom wall transversely between said sidewalls and a plurality of second ribs projecting upwardly from said bottom wall at an oblique angle to said sidewalls, wherein said first and second rollers and said rib assembly are an integral assembly with said U-shaped body.

A reinforced channel for use in an extension arm that mounts a device to a support, said channel comprising

• a U-shaped body having first and second spaced apart ends, said body including a pair of spaced apart sidewalls, each sidewall having an upper edge and a bottom wall therebetween;
• and a plurality of ribs within said body between said sidewalls projecting upwardly from said bottom wall;
• wherein said plurality of ribs extend to a location below said upper edge, said ribs forming an open channel extending between said first and second ends of said body between said upper edges of said sidewalls and said plurality of ribs.

A reinforced channel assembly for use in an extension arm that mounts a device to a support, said channel assembly comprising first and second channels each including a U-shaped body having first and second ends, each said body including a pair of spaced apart sidewalls and a bottom wall therebetween, wherein said first channel is longitudinally nested within said second channel forming a longitudinal opening therebetween;

• and a rib assembly within at least one of said U-shaped bodies between the sidewalls thereof overlying the bottom wall thereof, said rib assembly comprising a plurality of first ribs projecting upwardly from said bottom wall transversely between said sidewalls and a plurality of second ribs projecting upwardly from said bottom wall at an oblique angle to said sidewalls.

A reinforced channel assembly for use in an extension arm that mounts a device to a support, said channel assembly comprising first and second channels each including a U-shaped body having first and second ends, each said body including a pair of spaced apart sidewalls and a bottom wall therebetween, wherein said first channel is longitudinally nested within said second channel forming a longitudinal opening therebetween;

• and a plurality of ribs within at least one of said U-shaped bodies between the sidewalls thereof projecting upwardly from said bottom wall.