Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1997-04-18
1999-02-16
Maki, Steven D.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152DIG3, B60C 1111, B60C 1112
Patent
active
058715983
ABSTRACT:
A pneumatic tire having a tread provided with at least one circumferential groove extending substantially parallel with the tire circumferential direction, and inclined grooves arranged at intervals in the circumferential direction of the tire, the inclined grooves being inclined at an angle with respect to the circumferential groove and the axial direction, and blocks formed by the circumferential groove and the inclined grooves and arranged at intervals in the circumferential direction of the tire, the blocks having acute angle corners formed by the circumferential groove and the respective inclined grooves, wherein (a) a sipe is formed near one of the acute angle corners which contacts the ground later in the block during tire rotating, the sipe having an opening at the circumferential groove or at a tread end, and (b) the sipe extends from the opening toward the inside of the block substantially parallel with the inclined groove and terminates in the block. It is thus possible to restrain uneven wear without degrading steering stability in a tire with a pattern of blocks having acute angle corners.
REFERENCES:
Patent Abstracts of Japan, vol. 11, No. 158 (M-591), May 22, 1987 (JP 61 291205).
Patent Abstracts of Japan, vol. 13, No. 380 (M-863) Aug. 23, 1989 (JP 01 132406).
Patent Abstracts of Japan, vol. 95, No. 005, Jun. 30, 1995 (JP 07 040711).
European Search Report dated Jul. 28, 1997.
Bridgestone Corporation
Maki Steven D.
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