Cushion for supporting the lumbar region of the back of a seat occupant comprises a sealed envelope or bladder containing a resilient open celled foam member. A valve assembly, which is heat sealed to a corner portion of the bladder, permits the seat occupant to readily adjust the resilience of the cushion. A mounting strap attaches the cushion to the seat.
There is disclosed a lumbar support mechanism for a seat having a bracket adapted to be fixed on one side frame of a seat, a waistband adapted to extend across the seat between the bracket and the other side frame of the seat behind cushioning material of the seat, said bracket including an adjustment device to either alter the distance between the ends of a fixed length waistband or to alter the length of a portion of the waistband extending between the bracket and the other side frame of the seat which includes the improvement of providing a friction reducing device between the cushioning material of the seat and the waistband which friction reducing device extends from the bracket towards the other side frame of the seat.
