Abstract: A pneumatic cushion, in particular for a vehicle seat, has an upper and a lower film wall and at least one longitudinal welded seam. The upper and the lower film wall in the collapsed installed state of the pneumatic cushion bear against one another and form a flat structure which is defined to the side by longitudinal side edges. The longitudinal welded seam of the film bladder is provided in a film region between the two longitudinal side edges of the pneumatic cushion.

Abstract: A device for controlling a fluid volume in shape changing elements of vehicle seats has a sliding valve connectable with a fluid pressure source and with shape changing elements for filling the shape changing elements with fluid and discharging fluid from the shape changing elements, the sliding valve having a housing provided with connecting openings for a corresponding one of the shape changing elements and a control slider movable in the housing relative to the connecting openings, the control slider having at least one control opening cooperating with the connecting openings and at least one connecting passage which opens in the control opening and is loadable with fluid from the fluid pressure source, the control slider being formed as an axial slider which is guided on the housing, the axial slider having an axial displaceably sliding head provided with the at least one control opening and the at least one connecting passage and a slider rod rigidly connected with the slider head for axial displacement