Abstract: A wheelchair includes an independent suspension system having a spring and a shock absorber located between the chair and the wheel. The load exerted by the spring and the damping provided by the shock absorber are both variable in order to tune the independent suspension to various conditions.

Abstract: A folding wheelchair with an improved frame and suspension system provides a smooth and cushioned ride over uneven terrain. The rigid frame of the wheelchair has a double "X" configuration of cross-tubes to improve frame strength without adversely affecting the foldability of the frame. The suspension system of the wheelchair comprises a pair of suspension wings pivotally mounted to the chair frame by a pivot block. The rearward end of the suspension wing is rotatably attached to the wheel axle. The frontward end of the wing engages a spring or shock absorber which, in turn, attaches to the chair frame. The independent suspension of the wheels and relatively long pivotal axis of the wing from the wheel axle provides for better maneuverability of the chair and for a more comfortable ride. Additional cushioning of the occupant during travel over uneven terrain is provided by the shock-cushioning mechanism of the spring or shock absorber.