Pneumatic tire tread and buttress
FIG. 1 is a perspective view, partly schematic, of a pneumatic tire tread and buttress embodying my new design, it being understood that the pattern is repeated throughout the circumference of the tread and buttress, as shown schematically by solid lines, and that the buttress pattern is repeated on the opposite side; 
     FIG. 2 is an enlarged, fragmentary developmental plan view of the tread and buttress of FIG. 1; and 
     FIG. 3 is a sectional view of the tread and buttress, taken substantially as indicated by line 3-3 of FIG. 2; and 
     FIG. 4 is a sectional view of the tread and buttress, taken substantially as indicated by line 4-4 of FIG. 2.