초록 ▼

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 suspensio

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.

대표청구항 ▼

A folding wheelchair comprising a rigid frame and main wheels rotatably mounted on said frame by wheel axles, said wheelchair further comprising: left and right opposing closed frame members, each having a plurality of substantially horizontal and vertical frame members, said horizontal members incl

A folding wheelchair comprising a rigid frame and main wheels rotatably mounted on said frame by wheel axles, said wheelchair further comprising: left and right opposing closed frame members, each having a plurality of substantially horizontal and vertical frame members, said horizontal members including an upper and lower horizontal frame member and said vertical members including a forward and aft vertical frame member; a plurality of sets of cross-tubes, each set of said cross-tubes including a right and left diagonally-extending cross-tube, each of said cross-tubes having an upper and lower portion wherein said upper portion of each of said cross-tubes is movably attached to one of said upper horizontal frame members and said lower portion of each of said cross-tubes is movably attached to an opposing lower horizontal frame member, said sets of cross-tubes having pivot means for scissoring said sets together to fold said frame, a hinge tube rotationally engaging each upper horizontal frame member and hingedly coupled with each cross-tube for enhancing said scissoring; and a seat portion connected to at least two of said cross-tubes.