Patent ID: 7334619
Filing Date: 2008-02-26
Classification: B29D,B60C,Y10S

Abstract:
1. A pneumatic tire having blocks which are divided by tread grooves and which include a plurality of sipeings provided side-by-side, wherein each of said sipeings has: an opening which opens at a block surface and has a zigzag portion which extends in a zigzag form while repeating mountains and valleys, and sipeing wall surfaces which face each other on both sides of sipeing and which comprise one zigzag displacement portion where the zigzag portion is displaced toward one end of a longitudinal direction of the sipeing and another zigzag displacement portion where the zigzag portion is displaced toward the other end of the longitudinal direction, said one zigzag displacement portion and said another zigzag displacement portion are alternately repeated in a depth direction of the sipeing while substantially maintaining the shape of said zigzag portion, and wherein the following formulas are satisfied: wherein W W W W W wherein L L L L