[henryBsick]

I can most definitley say that it is a hook to grab onto the bar and slide along it with ease. The inventor doesn't show an added motor to power the "slide wheels" but it is possible to do ... I think. It looks like a very nice design. Complete 360 degree bar enclosement and nice "omni-wheel-like" sliders. Nice job.


EDIT: My one suggestion now that i look at it is to make the rollers' groove shallower to accomodate the bar circumference better. As it now it would roll on the points of each roller. But i still hold that is a pretty good job on the design work.