Patent ID: 9278580
Filing Date: 2016-03-08
CPC Classification: B29D,B60C

Claim Text:
1. A pneumatic tire comprising: a first row of blocks arranged in a substantially central region of a tread of the pneumatic tire, wherein the first row of blocks includes a plurality of first blocks; a plurality of first grooves, wherein each said first groove is arranged between two adjacent first blocks; a plurality of second rows of blocks each including a plurality of second blocks, wherein each said second row of blocks is arranged on either side of the first row of blocks; a plurality of second grooves, wherein each said second groove is arranged between the first row of blocks and each of the second rows of blocks; a plurality of third grooves, wherein each said third groove is arranged between two adjacent second blocks, the third grooves including a plurality of fourth grooves and a plurality of fifth grooves, with each said fourth groove being narrower than each said fifth groove, and said fourth groove and said fifth groove being arranged alternately along a circumference of the pneumatic tire; a plurality of third rows of blocks, each including a plurality of third blocks, wherein each said third row of blocks is arranged on an outer side of the second row of blocks in the direction of the width of the pneumatic tire; a plurality of sixth grooves, wherein each of said sixth grooves is arranged between two adjacent third blocks, wherein each of said sixth grooves is a ragged groove; and a seventh groove, wherein said seventh groove is arranged between one of the second rows of blocks and one of the third row of blocks, wherein the seventh groove has a zig-zag shape, wherein the fourth grooves, the fifth grooves and the sixth grooves are open at bending points of the zig-zag shape of the seventh groove, wherein each of the second rows of blocks and each of the third rows of blocks are arranged on an inner side, with respect to the tire width direction, of an outermost main groove, wherein adjacent ones of the fourth and fifth grooves extend in the same direction, wherein a first block opposes at least three second blocks, wherein an edge portion of one of said first blocks, on a second groove side thereof, opposes edge portions of at least three of said second blocks, on second groove sides thereof, and wherein openings of an adjacent pair of the first grooves, on the second groove side thereof, are arranged offset to openings of an adjacent pair of the fourth groove and the fifth groove, on the second groove side thereof, in the tire circumferential direction.