That is, until we encounter an issue that alerts us to a potential design dilemma ... a special type of hinge that increases the clearance of a doorway by allowing the door to open beyond 90 ...

The whole video is worth a watch, but he shows off the experimental design at the 7:47 mark. The hinge can swing normally but when positioned just right, the squared-off pin within slots into a ...

The knuckles surround the pin and allow the two leaves to move – making a door or lid open and close. Hinges come in all shapes and sizes. Some hinges have a more complicated design, and some ...