6 Bar vs Asymmetric 4 Bar

(Please see the attached illustration to help understand what I am attempting to explain by 6 bar, “common” 4 bar and asymmetrical 4 bar)

I understand the advantage of a 6 bar over a “common” 4 bar in terms of lifting distance. But what advantage are the additional 2 bars adding over an asymmetrical 4 bar? Thanks in advance for any help.
Asymmetric 4 bar.pdf (36.5 KB)

I can see the appeal of doing lifts this way, and I know this doesn’t answer your question, but I’m doing a Cascade lift, it takes up the least space and you don’t have to lift motors into the air.

Well so the asymmetric 4 bar is not too different from a 6 bar. However, the reason that people do six bars it to attach the lifted mechanism in a constant way. Without the top of the six bar, your mechanism would either be in line with the bar (so it’s angle changes as the lift angle changes) or you must rely on gravity to keep the mechanism straight. Neither of these tend to work very well, but if your specific design works for it, then by all means, go for it.

Basically what @AlexM_4478X said, the additional bars in a 6-bar keep whatever is mounted to the lift at a constant angle from bottom to top. If it was mounted to an asymmetric 4bar, the angle would be changing relative to the ground, but constant relative to the long bar of the 4bar. That could be useful for automaticaly flipping the caps as you lift them.