Housing assembly for a perimeter blasting device

FIG. 1 is a top perspective view of a base charge housing of a perimeter blasting device showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

FIGS. 1-8 include CAD lines that represent contour, not surface ornamentation.

FIGS. 1-8 are illustrated as if light is projected from the upper left and accordingly, the thickness of some edges appears exaggerated to represent shadow, which forms no part of the claimed design.