Modular wheelchair base
FIG. 1 is a right side elevation view of a modular wheelchair base showing our new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a left side elevation view thereof; 
     FIG. 4 is a bottom plan view thereof; 
     FIG. 5 is a front elevation view thereof; and 
     FIG. 6 is a rear elevation view thereof.