Patent ID: 7984948

Claim:
A lumbar support for a transportation vehicle comprising: a wire array ( 92 ) having a slide piece ( 99 ); a guide rail ( 94 , 95 ); an upper horizontal mounting rod ( 98 ) being in pivotal engagement with said wire array, fixedly attached to said slide piece ( 99 ), and slidingly engaged with said guide rail ( 94 , 95 ); an elevation rod ( 124 ) fixedly attached to said guide rail; a lower horizontal mounting rod ( 96 ) pivotally engaged with said wire array ( 92 ) and fixedly attached to said guide rail ( 94 , 95 ); a fixed frame ( 114 ) adapted to mount on a seat backrest frame and slidingly engaged with said guide rail ( 94 , 95 ) such that said wire array ( 92 ) may move substantially vertically along said fixed frame ( 114 ); and a traction cable ( 100 ) having a sleeve ( 102 ) and having a wire ( 104 ) disposed to slide axially within said sleeve, said sleeve and said wire each having a first end and a second end; said first ends of said sleeve ( 102 ) and said wire ( 104 ) being operatively engaged with an actuator ( 97 ) for applying traction to said traction cable ( 100 ); and said second end of said wire ( 104 ) being attached to said slide such that traction applied to said traction cable ( 100 ) by said actuator ( 97 ) moves said slide in a first direction thereby causing the upper horizontal mounting rod ( 98 ) to slide along said guide rail ( 94 , 95 ) compressing said wire array ( 92 ) into an arch shape.