Abstract: A variable lumbar support has a support assembly mountable on a seat frame, a pressure element engaged with the support assembly to move in relation to it in a first direction and a second direction. The directions are substantially parallel and opposite and usually vertical. A first traction element engaged with the support assembly and the pressure element moves the pressure element in the first direction and a second traction element engaged with the support assembly and with the pressure element moves the pressure element in the second direction. At least one actuator engaged with the traction elements causes the movement.

Abstract: A powered lumbar support device includes a panel having a first end and a second end. The panel is biased in a forward direction for providing an arch in a seat back. A lumbar frame extends downwardly from a support element for slideably supoprting the panel. A first cable is affixed to one of the ends of the panel and to an arching rack of a first gear box. Linear movement of the arching rack transfers motion to one of the ends to change the distance between the ends by moving the first cable. The powered lumbar support device includes a second gear box having a moving rack and a moving pinion for vertically shifting the lumbar support device. The second gear box may also be used to actuate additional support features, such as a bolster.

Abstract: A powered lumbar support device includes a resilient panel having a first flange and a second flange. The panel is biased in a forward direction for providing an arch in a seat back. A lumbar frame extends downwardly from a support element for slideably supporting the resilient panel. An extending member is affixed to the first flange and projects upwardly from the control module, which is retained in position by a compliant spring. The control module includes a drive mechanism for changing the arch in the basket by changing the distance between the first flange and the second flange by extending and retracting the extending member.

Abstract: A powered lumbar support device includes a resilient panel having a first flange and a second flange. The panel is biased in a forward direction for providing an arch in a seat back. A lumbar frame extends downwardly from a support element for slideably supporting the resilient panel. An extending member is affixed to the first flange and projects upwardly from the control module, which is retained in position by a compliant spring. The control module includes a drive mechanism for changing the arch in the basket by changing the distance between the first flange and the second flange by extending and retracting the extending member.

Abstract: A powered lumbar support device includes a panel having a first end and a second end. The panel is biased in a forward direction for providing an arch in a seat back. A lumbar frame extends downwardly from a support element for slideably supoprting the panel. A first cable is affixed to one of the ends of the panel and to an arching rack of a first gear box. Linear movement of the arching rack transfers motion to one of the ends to change the distance between the ends by moving the first cable. The powered lumbar support device includes a second gear box having a moving rack and a moving pinion for vertically shifting the lumbar support device. The second gear box may also be used to actuate additional support features, such as a bolster.