Abstract: A valve includes a flow chamber and an actuating chamber, and a connecting valve opening. An actuating element can close or open the valve opening. An SMA element and a restoring element move the actuating element in opposite directions. A first area of the flow chamber is attachable to an air supply unit, and a second area of the flow chamber is attachable to a media reservoir and to atmosphere to release air from the flow chamber via an opening. An actuator coupled with the actuating element selectively connects the opening to atmosphere or closes the opening. A first check valve prevents fluid from flowing back from the second area of the flow chamber through the valve opening into the first area of the flow chamber when the actuating element is in the opening position.

Abstract: A valve includes a housing enclosing a pressure chamber. At least one media opening is closeable via a valve element activated by a wire-shaped SMA element connected at its ends to a printed circuit board and at its middle to the valve element. The wire-shaped SMA element extends in a plane parallel to a direction of movement of the valve element.

Abstract: A mechanism for adjusting a contour of a seat, and a seat with a contour-adjusting mechanism, may include a selectively fillable air cushion and a support arrangement including a support element on which the air cushion is mounted.

Abstract: A mechanism for adjusting a contour of a seat, and a seat with a contour-adjusting mechanism, may include a selectively fillable air cushion and a support arrangement including a support element on which the air cushion is mounted.