Folding wheelchair

A folding wheelchair comprising crossed pivotally connected forward and rear wheeled leg members at opposite sides of the wheelchair, laterally folding and extensible interconnecting means for said leg members at opposite sides of the chair and extending therebetween laterally of the chair, whereby the opposite side leg members may be separated laterally to open the chair for use and moved together laterally to collapse the chair to a non-use laterally narrow form, a chair seat including substantially vertical side plates having inclined cam track means, for guiding the movement of the upper ends of the rear leg members corresponding end portions of the side plates pivoted to corresponding upper ends of the forward leg members at opposite sides of the chair, corresponding upper ends of the rear leg members at opposite sides of the chair being movably engaged with said inclined cam track means of said side plates, whereby folding of the crossed leg members at opposite sides of the chair to collapse the chair fore and aft will force said side plates and chair seat to pivot downwardly to a near vertical position between and substantially within the confines of said forward and rear leg members at the opposite sides of the chair, and interconnected independently foldable back and arm rest means pivotably mounted on said side plates, whereby the back and arm rest means may fold forwardly and downwardly between and substantially within the confines of the side plates and opposite side leg members.