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; 
     FIG. 3 is an enlarged sectional view of the tread and buttress, taken substantially as indicated by  line 3--3 of FIG. 2; and 
     FIG. 4 is an enlarged sectional view of the  tread and buttress, taken substantially as indicated by line 4--4 of FIG. 2.