Seat arrangements providing adjustable lumbar support

Details Seat arrangements providing adjustable lumbar support Seat arrangements providing adjustable lumbar support

A - Human Necessities

47

C

A47C 7/46 (2006.01) B60N 2/44 (2006.01) B60N 2/66 (2006.01)

Patent

CA 2106383

2106383 9313696 PCTABS00024 An assembly for incorporation in a seat back to provide adjustable lumbar support comprises a platform element (3) suspended by tension springs (2) in a seat frame (1) to support the cushioning of a back rest. The platform element (3) has elongate lateral rails (5, 9) between which extend transverse wires (10) that provide the platform support. A Bowden cable (21) is linked between respective portions of each of the rails (5, 9) to apply a force of longitudinal comrpession, whereby the rails (5, 9) are caused to be hinged outwardly at an articulation point (150) to vary the lumbar support provided by the transverse wires (10).

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