Tire

Patent metadata

Field	Value
Publication number	US-2016016437-A1
Application number	US-201414773477-A
Country	US
Kind code	A1
Filing date	Apr 24, 2014
Priority date	Apr 24, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

This tire improves high traction performance over an extended period of time and/or improves control performance while maintaining traction performance. This tire includes a tread with blocks formed thereon, protrusions ( 11, 21, 31 ) extending outward in the tire radial direction and formed on more than one of the blocks, and stepped portions ( 12, 22 ) and/or a second concavity ( 24 ) formed on a side of the protrusions ( 11, 21, 31 ).

First claim

1 . A tire comprising:
a tread with a plurality of blocks formed thereon; a protrusion extending outward in a tire radial direction and formed on more than one block among the plurality of blocks; and a stepped portion formed on a side of the protrusion.

2 . The tire of claim 1 , wherein a first concavity is formed in at least a portion of a position adjacent to the protrusion.

3 . The tire of claim 2 , wherein a height of the stepped portion is less than a height of a tread surface of a block peripheral portion.

4 . The tire of claim 1 , wherein in plan view of the tread, a perimeter of a tread surface of the protrusion is shaped as a polygon having at least one side extending in a tire width direction and one side extending in a tire circumferential direction.

5 . The tire of claim 1 , wherein the area of an upper surface of the stepped portion is less than the area of a tread surface of the protrusion.

6 . A tire comprising:
a tread with a plurality of blocks formed thereon; a protrusion extending outward in a tire radial direction and formed on more than one block among the plurality of blocks; and a second concavity formed on a tread surface of the protrusion.

7 . The tire of claim 6 , wherein a first concavity is formed in at least a portion of a position adjacent to the protrusion.

8 . The tire of claim 7 , wherein a height of the tread surface of the protrusion in the tire radial direction from a tread surface of a block peripheral portion is less than a height in the tire radial direction from a base of the first concavity to the tread surface of the block peripheral portion.

9 . The tire of claim 6 , wherein in plan view of the tread, a perimeter of a tread surface of the protrusion and a perimeter of an opening of the second concavity are each shaped as a polygon having at least one side extending in a tire width direction and one side extending in a tire circumferential direction.

10 . The tire of claim 6 , wherein the area of a tread surface of the protrusion is greater than the area of a base of the second concavity.

11 . The tire of claim 6 , wherein a depth of the second concavity in the tire radial direction is equal to or greater than a height of the tread surface of the protrusion in the tire radial direction from a tread surface of a block peripheral portion.

12 . The tire of claim 1 , wherein the tread is formed from rubber having a JIS A hardness of 55 or greater.

13 . The tire of claim 6 , wherein the tread is formed from rubber having a JIS A hardness of 55 or greater.

Assignees

• Bridgestone Corp

Inventors

• Ito Masafumi

Classifications

• B60C11/11 Primary

  in which the raised area of the pattern consists only of isolated elements, e.g. blocks (B60C11/12, B60C11/13 take precedence) · CPC title

• B60C2011/0016

  Physical properties or dimensions · CPC title

• B60C11/0008

  characterised by the tread rubber · CPC title

• B60C2200/10

  for motorcycles, scooters or the like · CPC title

• B60C11/0306 Primary

  Patterns comprising block rows or discontinuous ribs · CPC title