This 6 bar mechanism enables the hinge to rotate 180 deg..
At close position the hinge is not seen from outside.
Green, blue and violet bars create a parallelogram.
It is used for car doors.
STEP files of this video:
http://www.mediafire.com/download/9s5...
Inventor files:
http://www.mediafire.com/file/e6uj77a...