Title:
PNEUMATIC TIRE
Document Type and Number:
Japanese Patent JP2015016866
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve noise performance, snow road performance and ice road performance in a balanced manner.SOLUTION: A plurality of sipings are formed at a center block and a middle block. Center lateral grooves are inclined to a tire axial direction at angels of 5 to 20°, and its average groove width is 7 to 15% of the maximum length of the center block. Middle lateral grooves are inclined to the tire axial direction at angles of 5 to 25°, and its average groove width is 7 to 11% of the maximum length of the middle block. Center protrusions protruding to center main groove sides are formed at the center block. The center protrusions are substantially rectangular at a pair of center axial edges which extend to the tire width direction and separate to a tire circumferential direction, and at center circumferential edges which connect one-side ends of a pair of the center axial edges. One of a pair of the center axial ends forms a part of end edges in the tire circumferential direction which extend along the center lateral grooves of the center block.
Inventors:
KIMURA TATSUO
MATSUDA YOSUKE
MATSUDA YOSUKE
Application Number:
JP2014218566A
Publication Date:
January 29, 2015
Filing Date:
October 27, 2014
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C11/03; B60C11/12
Domestic Patent References:
| JPH08244417A | 1996-09-24 | |||
| JP2001206019A | 2001-07-31 | |||
| JP2001277818A | 2001-10-10 | |||
| JP2009012671A | 2009-01-22 | |||
| JPH07290908A | 1995-11-07 | |||
| JP2010064578A | 2010-03-25 | |||
| JPH08197913A | 1996-08-06 | |||
| JPH08244417A | 1996-09-24 | |||
| JP2001206019A | 2001-07-31 | |||
| JP2001277818A | 2001-10-10 |
Attorney, Agent or Firm:
Shintaro Sumitomo
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