More ideas from ani
Ratchet mechanism 22 - YouTube

Both go and back motions of blue slider make the wheel rotate in the same direction.

Pipe diametric rolling

Three grey rollers are self-centering, move radially for reducing diameter of the orange pipe that rotates and moves axially. Yellow crank-eccentrics, pink c.

Folding bridge 3 - YouTube

It is an application of scissors mechanism. The bridge (for pedestrians) is stretched and contracted by two brown motors turning red bars. Black weights are .

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