Patent ID: 8863361

Claim:
A door hinge for recessed installation between an edge of a door panel and a door jamb, the hinge comprising: first and second leaf assemblies that each form a cavity and that are recessed in the door-panel edge and in the door jamb; respective horizontally displaceable first and second guides in the first and second leaf assemblies; a pair of U-section links pivoted centrally together about a vertical center axis and each having a first end and a second end engaged in the cavities of the respective first and second leaf assemblies, the first end of one of the links and the second end of the other link being pivoted about respective fixed vertical axes fixed in the respective leaf assemblies, the second end of the one link and the first end of the other link being pivotal about respective movable vertical axes shiftable with the respective guides of the respective leaf assemblies, the first end of the other link being substantially vertically shorter than the first end of the one link; and steps in the first assembly forming axially confronting horizontal bearing formations vertically closely flanking and vertically bracing the first end of the other link.