Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1994-12-07
1997-07-15
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152454, 152526, B60C 300, B60C 1100, B60C 1101
Patent
active
056479255
ABSTRACT:
A pneumatic tire for trucks, buses, etc. having a tread profile, before inflation, which has a first circular arc forming a tread center area and second circulr arcs forming shoulder ribs at both sides of the first circular arc, the first and second circular arcs intersecting together at a point from which the shoulder rib starts to extend and inwardly of which there is a 1/4 tread width point from a tread center axis, the first and second circular arcs having an inner radial divergence, between an inside wall top of an outermost main groove and the intersecting point, of up to 3 mm and an outer edge divergence, between an outer edge of the shoulder rib and an elongated line of the first circular arc, of up to 10 mm, whereby a good river wear resistance is attained. The tire has a belt portion, below the tread portion, including a working belt ply composite and preferably has such a tread rubber thickness to an uppermost working belt ply that is larger at an end of the uppermost working belt ply than at the tread center axis.
REFERENCES:
patent: 4155392 (1979-05-01), Duderstadt et al.
patent: 4442879 (1984-04-01), Uemura
Sugimoto Hiroaki
Sumiya Yoshiro
Johnstone Adrienne C.
Toyo Tire & Rubber Co., Ltd.
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