Abstract: A device to actuate a drive gear of an adjustment mechanism of a vehicle seat includes a stepped switching mechanism manually operable in two directions by means of a swiveling lever that is rotationally connected with the drive gear in order to rotate it. The rotational connection between the stepped switching mechanism and the drive gear is releasable to facilitate a greater range of seat back adjustment.

Abstract: An automobile seat includes a seat back that is mounted on the seat body that pivots forward about a pivot axis, and two parallel seat rails on which the automobile seat is connected with the chassis so that it may be displaced longitudinally. Each of the seat rails includes base rails attached to the chassis and a slide rail that may be displaced longitudinally with respect to the base rail. The slide rail may be displaced via an electrical spindle drive that includes a drive motor, a drive spindle, and a spindle nut mounted thereon. The spindle nut is formed in two parts along the rotational axis of the drive spindle, and its parts may be moved into and out of engagement with the drive spindle via an actuation device. By means of the separation of the two parts of the spindle nut via the actuation device, they are not engaged, so that the slide rail is free to slide along the base rail.

Abstract: A car seat having a seat portion linked by means of connecting rods to a rail for longitudinal adjustment has a dampening element to transform kinetic energy into frictional or deformation energy. The dampening element is embodied as a separate component and has, on the one hand, an articulated link to a component on the seat portion as well as, on the other hand, to another component on the rail for longitudinal adjustment. The components include a threaded rod and a nut that can rotate around it, as well as a sleeve-shaped component that surrounds at least a part of the nut. The nut can be moved longitudinally relative to the sleeve-shaped component while overcoming a force of friction or deformation.

Abstract: A device to actuate a drive gear of an adjustment mechanism of a vehicle seat includes a stepped switching mechanism manually operable in two directions by means of a swiveling lever that is rotationally connected with the drive gear in order to rotate it. The rotational connection between the stepped switching mechanism and the drive gear is releasable to facilitate a greater range of seat back adjustment.