Ceiling window 1

Yellow panels, violet and blue rockers create parallelogram mechanisms. Grey crank fixed to a load chain-wheel moves the panels synchronically. The gravity and two red stoppers keep the panels firmly at their end positions.
STEP files of this video:
http://www.mediafire.com/download/nv1cv9ov9ec0te3/CeilingWindow1STEP.zip
Inventor files:
http://www.mediafire.com/file/jsvcziy9s38nzlz/CeilingWindow1Inv.zip

Видео Ceiling window 1 канала thang010146