Patent ID: 7527321

Claim:
A door system for a vehicle having a vehicle body that encloses a passenger compartment, the door system comprising: a first vehicle door and a second vehicle door that are movable into a common vehicle door opening in the vehicle body, the vehicle doors being movable from an open position to a closed position in which vehicle doors are arranged lying opposite to each other in a connecting region; a plurality of stiffening elements for stiffening the vehicle doors in the vehicle door opening, wherein a first stiffening element is arranged in a connecting region of the first vehicle door and a second stiffening element is arranged in the connecting region of the second vehicle door, the stiffening elements being spaced apart when the vehicle doors are closed and in a rest position, in the event of an impact against the vehicle door in the closed position the stiffening elements move to an active position to interact in a force-transmitting manner to stiffen the vehicle doors in the connecting region, and further wherein the stiffening elements have cross-sectional profiles that are suitable for effective interengagement of the stiffening elements in the active position, wherein the cross-sectional profiles each have at least one hook comprising a limb and a transverse limb, which is arranged on a limb end side at an angle to the limb and has a plurality of limb side surfaces, the transverse limb of the first stiffening element is arranged to point essentially away from the passenger compartment and the transverse limb of the second stiffening element is arranged to point essentially toward the passenger compartment with the hooks being arranged to overlap in the closed position.