Patent ID: 7735922

Claim:
A passenger seat, comprising: a backrest; a seat frame coupled to said backrest; a seat cushion carrier with a seat cushion mounted on said seat frame, said seat cushion having a front edge; and an adjustment mechanism coupled to said seat cushion for moving said front edge relative to said backrest and fixing said front edge in various adjusted positions relative to said backrest, said adjustment mechanism including at least one variable-volume energy accumulator bag having at least one elastomeric enclosing wall biasing said front edge toward a retracted position, each of said adjusted positions being associated with one volume level of said accumulator bag, said bag being chargeable with and emptiable of a pressure medium, said accumulator bag being charged with said medium in an initial state to locate said front edge in an extended position with increased seat depth, and emptied or evacuated to locate said front edge in said retracted position with decreased seat depth.