Pneumatic tire including grooves having ribs therein

Details Pneumatic tire including grooves having ribs therein Pneumatic tire including grooves having ribs therein

1998-02-10

2000-09-05

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

15220925, 15220928, B60C 1113, B60C10100, B60C11500

Patent

active

061127884

ABSTRACT:
A pneumatic tire comprises a tread portion provided with a plurality of longitudinal grooves, each of the longitudinal grooves extending continuously in the tire circumferential direction and having a bottom and a pair of sidewalls defining corners therebetween, the corners being rounded by a circular arc whose radius is not more than 2 mm, the inclination angles of the sidewalls being in the range of not more than 15 degrees with respect to the normal direction to the tread surface line, the bottom being provided with a plurality of ribs which extend in the longitudinal direction of the groove in substantially parallel with each other so that the bottom has a wavy configuration having no angled corner, the heights of the ribs measured from the deepest point of the longitudinal groove being in the range of from 0.5 to 1.0 mm.

REFERENCES:
patent: 2164819 (1939-07-01), Hicks et al.
patent: 2260193 (1941-10-01), Overman
patent: 2268344 (1941-12-01), Shesterkin et al.
patent: 2605807 (1952-08-01), Wittmer
patent: 2708957 (1955-05-01), Constantakis et al.
patent: 3682220 (1972-08-01), Verdier
patent: 4687037 (1987-08-01), Pfeiffer et al.
patent: 5375639 (1994-12-01), Suzuki et al.
patent: 5417269 (1995-05-01), Kinoshita et al.
patent: 5450885 (1995-09-01), Hanya

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