Patent ID: 8448911

Claim:
A rail arrangement for coupling in an aircraft a displaceable element to a support structure, wherein the rail arrangement comprises: a guiding rail and a fitting adapted for being connected to the displaceable element; wherein the guiding rail is connected to the support structure; wherein the fitting is arranged in the guiding rail in such a way that the fitting can be displaced in a longitudinal direction of the guiding rail; wherein the guiding rail is formed as an open-top hollow profile with a rail base; at least one elevation formed in the rail base, the elevation extending towards the open-top; wherein the fitting comprises a bottom surface which in a longitudinal direction is interrupted by a continuous groove configured such that the fitting is guided by the elevation along the guiding rail, the elevation extending into the groove; wherein the groove comprises a groove base, and the elevation comprises a top, wherein during displacement of the fitting the groove base slides along the top, the fitting borne by the top of the elevation so as to receive a weight of the fitting from above and wherein the groove of the fitting is shaped in such a way that the cross section of the groove essentially corresponds to the cross section of the elevation and wherein the bottom surface of the fitting is configured so that there is a gap between the bottom surface of the rail base.