Abstract: A fixed plate supporting the vehicle seat is secured to longitudinal adjusting slides. The fixed plate supports a rotary intermediate plate via a first ball bearing and a cover rigidly connected to the fixed plate and supported at the rotary intermediate plate via a second ball bearing. The assembly is centered on the two ball bearings. Displacement of a central rod is controlled by a lever articulated on a pivot rigidly connected to the fixed plate. This lever is forked and cooperates with the head of the rod and a washer separated from the head by a spring mounted concentrically to the rod. The lever actuates, in one direction, two safety latches normally latching the rotary intermediate plate in order to release the seat for a 180.degree. rotation.

Abstract: The lifting device for a vertically adjustable front cushion of a vehicle seat comprises a support structure with first and second vertically extending flanges on either side. The first flanges have a fixedly connected first pin and the second flanges have a fixedly connected bearing with a rotatable second pin. The support armature of the front cushion has on either side a third and a fourth pin. First connecting rods are pivotably connected with the first and third pins. Each first connecting rod has a fifth pin between the first and third pin. Second connecting rods are pivotably connected with the second and fourth pins. Curved plates with a cutout are pivotably connected to the fifth pins. A horizontal S-shaped lever is pivotably connected with its center to the support structure. A fork is connected with a lug to the rear end of the S-shaped lever. A stud is connected to the support structure. Arms are fixed to the second pins, and a transverse stay connects their free ends.