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A collapsible wheelchair frame having left and right side plates, each having an upper end, a lower end, and a forward end, each forward end forming a forwardly and downwardly and extending leg; left and right seat plates, each seat plate having proximal and distal ends, the proximal ends of the lef

A collapsible wheelchair frame having left and right side plates, each having an upper end, a lower end, and a forward end, each forward end forming a forwardly and downwardly and extending leg; left and right seat plates, each seat plate having proximal and distal ends, the proximal ends of the left and right seat plates being respectively hingedly attached to the upper ends of the left and right seat plates, the distal end of the left seat plate being hingedly attached to the distal end of the right seat plate; and left and right brace plates, each brace plate having proximal and distal ends, the proximal ends of the left and right brace plates being respectively hingedly attached to the lower ends of the left and right side plates, the distal end of the left brace plate being hingedly attached to the distal end of the right brace plate.

대표청구항 ▼

The invention claimed is: 1. A collapsible wheelchair frame assembly comprising: (a) left and right side plates, each having an upper end, a lower end, a forward end, and a rearward end, each upper end comprising an upper edge, each forward end having a lower end, each forward end's lower end formi

The invention claimed is: 1. A collapsible wheelchair frame assembly comprising: (a) left and right side plates, each having an upper end, a lower end, a forward end, and a rearward end, each upper end comprising an upper edge, each forward end having a lower end, each forward end's lower end forming a forwardly and downwardly extending leg; (b) left and right seat plates, each seat plate having proximal and distal ends, the proximal ends of the left and right seat plates being respectively hingedly attached to the upper ends of the left and right side plates, the hinged attachments of the proximal ends of the left and right seat plates being respectively positioned upon the upper ends of the left and right side plates so that the left and right side plates' upper edges substantially coincide with said hinged attachments, the distal end of the left seat plate being hingedly attached to the distal end of the right seat plate; and (c) left and right brace plates, each brace plate having proximal and distal ends, the proximal ends of the left and right brace plates being respectively hingedly attached to the lower ends of the left and right side plates, said hinged attachments being positioned between the left and right side plates' forward and rearward ends, the distal end of the left brace plate being hingedly attached to the distal end of the right brace plate. 2. The collapsible wheelchair frame assembly of claim 1 further comprising hyperextension stopping means connected operatively to or formed wholly with the left and right seat plates. 3. The collapsible wheelchair frame assembly of claim 2 wherein the hyperextension stopping means comprise the distal ends of the left and right seat plates. 4. The collapsible wheelchair frame assembly of claim 3 wherein, upon flexion of the left and right seat plates, their proximal ends respectively overlie the upper ends of left and right side plates. 5. The collapsible wheelchair frame assembly of claim 4 wherein, upon flexion of the left and right brace plates, the left and right brace plates respectively underlie the left and right side plates' legs. 6. The collapsible wheelchair frame assembly of claim 5 wherein the lower ends of the left and right side plates and the proximal ends of the left and right brace plates are forwardly canted. 7. The collapsible wheelchair frame assembly of claim 6 wherein each plate among the left seat plate, the right seat plate, the left brace plate, and the right brace plate has a length extending from its proximal end to its distal end, and wherein said each plate's length is substantially equal to the length of each other plate among said plates.