Abstract: In a longitudinal seat adjuster (3) for a vehicle seat, in particular a motor vehicle seat, with at least one seat rail assembly (5) including at least two seat rails (11a, 12, 13b) that define an installation space (15) and are powered by a motor to be relocatable in relative position to one another, at least a first spindle (20) and a first spindle nut (21) are located within the installation space (15) and interact with one another, and the installation space (15) allows room for a second spindle (30) and a second spindle nut (31).

Abstract: In a longitudinal adjuster (1) for a vehicle seat, in particular for an automobile seat, with a first seat rail (3), a second seat rail (4) adapted for sliding movement relative to the first seat rail (3), and an engagement member (8) arranged on the second seat rail (4), the first seat rail (3) includes a stop plate (15) with first stop surfaces. The first stop surfaces cooperate with second stop surfaces of the engagement member (8) for limiting the movement of the seat rail (3, 4).

Abstract: In a longitudinal adjuster (1) for a vehicle seat, in particular for an automobile seat, with a first seat rail (3), a second seat rail (4) adapted for sliding movement relative to the first seat rail (3), and an engagement member (8) arranged on the second seat rail (4), the first seat rail (3) includes a stop plate (15) with first stop surfaces. The first stop surfaces cooperate with second stop surfaces of the engagement member (8) for limiting the movement of the seat rail (3, 4).

Abstract: In a longitudinal seat adjuster (3) for a vehicle seat, in particular a motor vehicle seat, with at least one seat rail assembly (5) including at least two seat rails (11a, 12, 13b) that define an installation space (15) and are powered by a motor to be relocatable in relative position to one another, at least a first spindle (20) and a first spindle nut (21) are located within the installation space (15) and interact with one another, and the installation space (15) allows room for a second spindle (30) and a second spindle nut (31).

Abstract: In a longitudinal adjusting device for a vehicle seat, in particular for a motor vehicle seat, having a first seat rail (5), a second seat rail (8) which can be displaced relative to the first seat rail (5) in the longitudinal direction, and a mounting part (12) which is arranged on the second seat rail (8), the first seat rail (5) on the one hand and the second seat rail (12) with the mounting part (12) on the other engaging alternately one around the other, a roof-shaped element (24) which limits, as a stop, the displacement in the longitudinal direction is formed on the mounting part (12).

Abstract: In a longitudinal adjusting device for a vehicle seat, in particular for a motor vehicle seat, having a first seat rail (5), a second seat rail (8) which can be displaced relative to the first seat rail (5) in the longitudinal direction, and a mounting part (12) which is arranged on the second seat rail (8), the first seat rail (5) on the one hand and the second seat rail (12) with the mounting part (12) on the other engaging alternately one around the other, a roof-shaped element (24) which limits, as a stop, the displacement in the longitudinal direction is formed on the mounting part (12).

Abstract: In a supplemental locking mechanism (11) for a longitudinal adjuster of a vehicle seat, in particular for a longitudinal adjuster of an automobile seat, wherein an upper rail (4) extends for sliding movement in a lower rail (5) and is adapted for being locked with same, the supplemental locking mechanism (11) being inactive in the normal case, and locking the upper rail (4) with the lower rail (5) only in the event of a crash. A part of a safety belt system is arranged on a belt adapter (12), which is secured to the upper rail (4), with the mounted component of the safety belt system moving in the event of a crash at least one part (12′″) of the belt adapter (12) in a defined manner relative to the upper rail (4) and to the lower rail (5), thereby engaging the supplemental locking device (11).