Portion of Child Safety Seat Base

FIG. 1 is a top, front, left side perspective view of a portion of child safety seat base, showing our new design;

FIG. 2 is a top, rear, right side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a top, front, left side perspective view of the portion of child safety seat base, shown in a condition of use; and,

FIG. 10 is a top, front, left side perspective view of the portion of child safety seat base, shown in another condition of use.

The broken lines showing the child safety seat base depict environmental subject matter that forms no part of the claimed design.