Input: blue rocker receiving motion from a pneumatic cylinder. Output: orange shaft to which a ratchet wheel is fixed. There are two pawls. The pink pushes the ratchet wheel. The green keeps the wheel immobile when the pink reverses. The gravity maintains contact between the pawls and the ratchet wheel. In case of high speed, springs must be added. STEP files of this video: https://www.mediafire.com/file/1rizdi0jdxtztbd/RatchetMechanism40STEP.zip/file Inventor files of this video: https://www.mediafire.com/file/rj5unxpg0i3w2mg/RatchetMechanism40Inv.zip/file