Patent ID: 7735199

Claim:
A hinge assembly for use with a door of an entity, the hinge assembly comprising: a door support assembly, adapted to couple to the door; a hinge arm assembly, comprising a first gear assembly, adapted to couple to the entity, a second gear assembly, adapted to couple the hinge arm assembly to the door support assembly, and a linkage assembly, coupled to the first and second gear assemblies; the linkage assembly comprising a pivot member connected between first and second rigid linkage members, wherein the first rigid linkage member is directly connected to and between the first gear assembly and the pivot member, and the second single rigid linkage member is directly connected to and between the pivot member and the second gear assembly; and the first and second gear assemblies and linkage assembly being configured to cooperate to move the door support assembly and hinge arm assembly with respect to each other, the first gear assembly comprising first and second interlocking gears, each interlocking gear including teeth on less than half of the circumference of the gear, the first gear stationary with respect to the entity, and the second gear pivotally coupled to the hinge arm assembly and rotatable with respect to the first gear when the hinge assembly moves the door between the open and closed positions.