Title:
Pneumatic tires
Document Type and Number:
Japanese Patent JP6350001
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pneumatic tire which can simultaneously improve rolling resistance and noise performance.SOLUTION: At least two main grooves 11 in a circumferential direction and a plurality of lateral grooves 21, 31, 32, 33, 41, 42 extending in a tire width direction are arranged in a tread part 1 of a pneumatic tire. A plurality of repetition elements Rc, Rs including the lateral grooves at a center region Ce and a shoulder region Sh are repeatedly formed in the circumferential direction of the tire. These repetition elements are constituted by pitch variations including at least three sorts of pitches. When the number of the pitch variations is N, a groove area ratio of each repetition element at the center region is Sc(1), ..., Sc(N-1), Sc(N) in order from longer pitches, Sc(2)-Sc(1)≥Sc(3)-Sc(2)≥...≥Sc(N)-Sc(N-1) and Sc(1)>Sc(N) are satisfied. At the shoulder region, the same relationship is satisfied.
Inventors:
Yoshifumi Koishikawa
Application Number:
JP2014126627A
Publication Date:
July 04, 2018
Filing Date:
June 19, 2014
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO.,LTD.
International Classes:
B60C11/03; B60C11/12
Domestic Patent References:
| JP9030213A | ||||
| JP2004299652A | ||||
| JP10100614A | ||||
| JP2012025192A | ||||
| JP2013039870A | ||||
| JP63275407A | ||||
| JP2041907A | ||||
| JP2007168572A |
Foreign References:
| US6415836 |
Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Takayoshi in the daytime
Shinichi Ogawa
Takashi Noguchi
Masao Sakaizawa
Kenji Sato
Isao Hirai
Takayoshi in the daytime
Shinichi Ogawa
Takashi Noguchi
Masao Sakaizawa
Kenji Sato
Isao Hirai