Screw 2-stage telescopic actuator 1

Input: yellow shaft. Pink tube has a prismatic joint with the input shaft, a helical joint with the grey base (the first screw-nut drive), a helical joint with green center screw (the second screw-nut drive) and a revolution joint with the orange tube. The latter has a prismatic joint with the base. The green tube fixed to the center screw has a prismatic joint with the orange tube. The first screw-nut drive is of right hand thread, L1 mm lead. The second screw-nut drive is of left hand thread, L2 mm lead. If the input shaft rotates N revolutions, the green slider performs a displacement of N*(L1+L2) mm. This video was made based on US patent US8220349. STEP files of this video: https://www.mediafire.com/file/z51ejo... Inventor files of this video: https://www.mediafire.com/file/gofb5m...