Title:
【発明の名称】空気入りタイヤ
Document Type and Number:
Japanese Patent JP3332358
Kind Code:
B2
Abstract:
A pneumatic tyre comprises a circumferentially continuously extending wide groove (9) having a width of from 35 to 45 mm disposed in a tread centre. A part (10) on each side of the wide groove, which is defined as extending at least 10 mm axially outwards from the groove edge, is formed as a substantially continuous rib part (10). A part between the rib part (10) and the tread edge (E) is provided with circumferentially discontinuous grooves (12) so that: an axially inner part (Al) has a land ratio (La) of not less than 90%; a middle part (A2) has a land ratio (Lb) in a range of from 80 to 90%; and an axially outer part (A3) has a land ratio (Lc) in a range of from 85 to 95%, wherein the axially inner part (Al), middle part (A2) and axially outer part (A3) are three equiwidth parts between the wide groove (9) and the tread edge (E). Preferably, the middle part (A2) is provided with oblique grooves (12) inclined at an angle of not more than 30 degrees with respect to the tyre circumferential direction.
Inventors:
Tetsuhiko Yoshioka
Yoshinori Nakagawa
Yoshinori Nakagawa
Application Number:
JP22795299A
Publication Date:
October 07, 2002
Filing Date:
August 11, 1999
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
B60C11/113; B60C11/03; B60C11/04; (IPC1-7): B60C11/04
Domestic Patent References:
| JP6191227A | ||||
| JP6143932A | ||||
| JP11301212A | ||||
| JP825917A | ||||
| JP11189011A |
Attorney, Agent or Firm:
Tadashi Naemura (1 person outside)