Caster unit for a suitcase
FIG. 1 is a perspective view of caster unit for a suitcase showing my new design; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is a rear elevational view thereof; 
     FIG. 4 is a left side elevational view thereof; 
     FIG. 5 is a right side elevational view thereof; 
     FIG. 6 is a top plan view thereof; 
     FIG. 7 is a bottom plan view thereof; 
     FIG. 8 is a perspective view of a second embodiment of that shown in FIG. 1; 
     FIG. 9 is a front elevational view thereof; 
     FIG. 10 is a rear elevational view thereof; 
     FIG. 11 is a left side view thereof; 
     FIG. 12 is a right side view thereof; 
     FIG. 13 is a top plan view thereof; and, 
     FIG. 14 is a bottom plan view thereof.