US Patent 9126506 Longitudinally adjustable vehicle seat

A longitudinally adjustable vehicle seat, having at least one pair of seat rails (10), has a first seat rail (12) fixed to the structure, a second seat rail (13) guided in the first seat rail (12) and connected to the vehicle seat (1). Balls (14) are arranged in ball holders (15), which are arranged between the first seat rail (12) and the second seat rail (13) in order to reduce friction. The first seat rail (12) forms a ball track along which the balls (14) roll with a first end stop and a second end stop, which limit the mobility of the pair of seat rails (10). At least one elevation (12″) is provided, which projects into the ball track. The elevation (12″) can be overcome by at least one ball (14) and the ball holder (15).