Portable ramp for wheelchairs
FIG. 1 is a perspective view of a portable ramp for wheelchairs showing my new design in a folded condition; 
     FIG. 2 is a top plan view thereof in open condition; 
     FIG. 3 is a bottom perspective view thereof in open condition; 
     FIG. 4 is a top perspective view thereof in operative condition; and 
     FIG. 5 is a perspective view thereof in folded condition and attached to the rear of a wheelchair. 
     The broken lines in FIGS. 4 and 5 of the drawing are for illustrative purposes only.