US 9,809,061 B2
Tire
Yuki Kawakami, Rome (IT)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 14/409,290
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Jul. 4, 2013, PCT No. PCT/JP2013/068343
§ 371(c)(1), (2) Date Dec. 18, 2014,
PCT Pub. No. WO2014/007317, PCT Pub. Date Jan. 9, 2014.
Claims priority of application No. 2012-150928 (JP), filed on Jul. 4, 2012.
Prior Publication US 2015/0165827 A1, Jun. 18, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. B60C 11/13 (2006.01); B60C 11/03 (2006.01); B60C 11/04 (2006.01); B60C 11/01 (2006.01)
CPC B60C 11/0327 (2013.01) [B60C 11/01 (2013.01); B60C 11/0306 (2013.01); B60C 11/0309 (2013.01); B60C 11/04 (2013.01); B60C 11/1369 (2013.01); B60C 11/1384 (2013.01); B60C 2011/1361 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A tire comprising:
a tread section with a groove portion formed to extend in a tire circumferential direction; and
a plurality of projection parts provided on a groove bottom of the groove portion, wherein
each of the projection parts extends from one of side walls forming the groove portion to the other side wall opposed to the one side wall,
the one of side walls is provided with a recess portion guiding air flow flowing through a lateral groove portion to one direction of a tire circumferential direction,
the recess portion is triangular in a tread face view of the tire and is located at a location opposed to the lateral groove portion having an opening at the groove portion,
a vertex of the recess portion is located on a position which is located in an extending direction of the lateral groove portion and displaced from a center line of the lateral groove portion passing a center in a direction orthogonal to the extending direction of the lateral groove portion,
the projection parts are arranged at predetermined intervals in the groove portion,
a relationship of 0.75L≤P≤10L is satisfied in the tread face view of the tire where L denotes a length of the projection parts along a groove center line passing a widthwise center of the groove portion, and P denotes the predetermined intervals, and
a relationship of TWf/cos θf≤0.9W is satisfied in the tread face view of the tire where W denotes a groove width of the groove portion, TWf denotes a width of the projection parts in a direction orthogonal to an extending direction of the projection parts, and θf denotes an angle formed by the extending direction of the projection parts and the groove center line in a direction opposite to a rotation direction of the tire.