Patent ID: 7654488

Claim:
A door arrangement for an aircraft that has a fuselage with a fuselage structure that includes a door frame surrounding a door opening, the door arrangement comprising: a door to be disposed inside the door frame; and a first door joint mechanism attached to the door and to the fuselage structure, and including a seven-joint linkage with first to seventh joints, the door being moveable exclusively in a rotationally articulated manner by the linkage over a predefined pivoting angle range from a closed position inside the door frame to an open position outside of the door frame and fuselage, and back again; wherein the seven-joint linkage has three articulated lever-like linkage members and at least one articulated, lever-like coupling element joining two of the three lever-like linkage members to each other in an articulated manner, the lever-like coupling element imparting the seven-joint linkage with one degree of freedom; wherein, in the closed position of the door and viewing the seven-joint linkage in the direction of the joints: the first linkage member is mounted at its upper end with the first joint in an articulated manner on the door, wherein the first joint can be locked in a stationary position relative to the door and forming a pivot with the door, and the first linkage member is mounted at its lower end with the second joint in an articulated manner on the door frame, the second joint being disposed stationary relative to the door frame; the second linkage member is mounted at its lower end with the third joint in an articulated manner on the door, wherein the third joint can be locked in a stationary position relative to the door; the third linkage member is mounted at its lower end with the fourth joint in an articulated manner on the door frame, the fourth joint being disposed stationary relative to the door frame; an upper free end of the second linkage member is connected to an upper free end of the third linkage member via the fifth joint, the fifth joint being non-stationary relative to the door and the door frame, so that the upper ends of the second linkage member and of the third linkage member have the fifth joint as a shared joint, and the second linkage member is pivotable around the third joint and the third linkage member is pivotable around the fourth joint; and at its lower end, the articulated lever-like coupling element with the sixth joint is attached in an articulated manner to the first linkage member and, at its upper end, the articulated lever-like coupling element with the seventh joint is attached to the third linkage member.