Pneumatic tire having V-shaped subgrooves

Details Pneumatic tire having V-shaped subgrooves Pneumatic tire having V-shaped subgrooves

1996-04-24

1998-06-02

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152209D, 152454, 152526, 152527, 152536, B60C 300, B60C 918, B60C11500

Patent

active

057593132

ABSTRACT:
A pneumatic tire in which sub-grooves extending at least in the widthwise direction of the tire are provided in a center portion of a tread surface and shoulder portions thereof on both sides of the center portion at a predetermined pitch, both the width and depth of the sub-grooves in the two shoulder portions being set larger than those of the sub-grooves in the center portion, a ratio of the area of the sub-grooves in the two shoulder portions to that of the tread surface being set larger than a ratio of the area of the sub-grooves in the center portion to that of the tread surface. This tire can be used with the air pressure therein set higher under the on-road travelling condition, and lower under the off-road travelling condition.

REFERENCES:
patent: D365071 (1995-12-01), Hamamoto et al.
patent: 2605807 (1952-08-01), Wittmer
patent: 3584670 (1971-06-01), Verdier
patent: 4044810 (1977-08-01), Taniguchi et al.
patent: 4258769 (1981-03-01), Makino et al.
patent: 4481991 (1984-11-01), Pieper
patent: 4572261 (1986-02-01), Binsfeld
patent: 4649975 (1987-03-01), Kogure et al.
patent: 4676290 (1987-06-01), Tansei et al.
patent: 5222537 (1993-06-01), Saito et al.
patent: 5240053 (1993-08-01), Baumhofer et al.
patent: 5373885 (1994-12-01), Yamashita
patent: 5421391 (1995-06-01), Himuro
patent: 5435366 (1995-07-01), Voigt et al.
patent: 5580404 (1996-12-01), Hitzky

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