Abstract: A lift-assisted device including a seat portion; a seat support portion which supports the seat portion; a base portion; an undercarriage portion which comprises of at least one scissor linkage member, each scissor linkage member including a first member pivotable connected to a second member near a center portion of the first and second member; a pneumatic bag located between the seat portion and the base portion; a pneumatic cylinder located between the seat portion and the base portion; a pneumatic powering means for powering the pneumatic bag and/or pneumatic cylinder and wherein the first member and second member are slidably connected to the seat portion on one end and fixedly connected to the base portion on an opposite end.