US Patent 9816302 Concealed external hinge with 180 degree rotation

An external hinge is provided for pivotally connecting a door to a sidewall while obtaining at least 180 degrees of opening movement or degree of rotation. The external hinge is substantially concealed behind the sidewall and the door in a fully closed position of the door. In one embodiment, the external hinge comprises a first curved arm extending between a first pivot pin of a first part mounted on an interior surface of the sidewall and a second pivot pin of a second part mounted on an interior surface of the door. The external hinge further comprises a second curved arm extending between a third pivot pin of the first part mounted on the interior surface of the sidewall and a fourth pivot pin of the second part mounted on the interior surface of the door.