US Patent 7886409 Motorized door hinge

A vertically opening vehicle door hinge has a base member secured to a chassis at bolt slots disposed as elongated openings on the base member. A primary swivel member is swivel mounted to the base member so that the primary swivel member swivels on the plane defined by the base member. The primary swivel member has a primary swivel axis normal to the point defined by the base member. The arm is swivel mounted to the primary swivel member at a secondary swivel. The secondary swivel has an secondary swivel axis of rotation normal to the primary swivel axis. A motor actuates the primary swivel member. The arm has an extended position corresponding to an open vehicle door and a retracted position corresponding to a closed vehicle door.