US 9,809,062 B2
Tire
Yukihiro Kiwaki, Higashimurayama (JP)
Assigned to BRIDGESTONE CORPORATION, Chuo-ku, Tokyo (JP)
Appl. No. 14/406,680
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Jun. 17, 2013, PCT No. PCT/JP2013/066548
§ 371(c)(1), (2) Date Dec. 9, 2014,
PCT Pub. No. WO2013/191119, PCT Pub. Date Dec. 27, 2013.
Claims priority of application No. 2012-137853 (JP), filed on Jun. 19, 2012; and application No. 2012-137857 (JP), filed on Jun. 19, 2012.
Prior Publication US 2015/0151587 A1, Jun. 4, 2015
Int. Cl. B60C 11/04 (2006.01); B60C 11/12 (2006.01); B60C 11/13 (2006.01); B60C 11/03 (2006.01)
CPC B60C 11/1259 (2013.01) [B60C 11/0304 (2013.01); B60C 11/0306 (2013.01); B60C 11/0309 (2013.01); B60C 11/125 (2013.01); B60C 11/1236 (2013.01); B60C 11/1353 (2013.01); B60C 2011/036 (2013.01); B60C 2011/0344 (2013.01); B60C 2011/0355 (2013.01); B60C 2011/0365 (2013.01); B60C 2011/0369 (2013.01); B60C 2011/0388 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A tire comprising:
a circumferential direction main groove extending in a circumferential direction on a tread surface;
a pair of circumferential direction supplemental grooves extending in the circumferential direction, and located on both sides of the circumferential direction main groove in a tread width direction; and
a pair of central land portions having a rib shape, and formed between the circumferential direction main groove and the pair of circumferential direction supplemental grooves, wherein
each of the central land portions has a plurality of sipes, and each of the sipes extends to the circumferential direction main groove to form an opened portion,
the circumferential direction main groove has shallow grooved portions and deep grooved portions a depth of which from the tread surface is larger than a depth of the shallow grooved portions from the tread surface,
the depth of the shallow grooved portions from the tread surface is smaller than a depth of the circumferential direction supplemental grooves from the tread surface,
a plurality of short sipes that are opened to the circumferential direction main groove are formed on the central land portion located on an inner side when the tire is installed on a vehicle, and
a length of the short sipes is smaller than a length of the sipes, and a width of the short sipes is larger than a width of the sipes.