High-speed tires

Details High-speed tires High-speed tires

1981-05-11

1984-06-26

Powell, William A.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152354R, 152361R, D12146, B60C 1100

Patent

active

044560460

ABSTRACT:
A high-speed tire for use during both wet and drying road surface conditions is disclosed. The tread groove depth increases from a minimum depth near each tread edge to a maximum depth near the mid-circumferential plane. Each of an outer group of tread elements has a ground-contacting surface area equal to at least about two square inches, and the net-to-gross ratio of the tread central zone is not greater than about 65 percent. Transverse grooves extend from the mid-circumferential plane to a tread edge at an angle relative to the mid-circumferential plane which is greater than about 75 degrees at the respective tread edge and which is less than about 40 degrees at the mid-circumferential plane. The widths of circumferential grooves progressively decrease as their respective distances from the mid-circumferential plane increase.

REFERENCES:
patent: D54912 (1920-04-01), Grote
patent: D92418 (1934-08-01), Miller
patent: D157953 (1950-04-01), Hawkinson
patent: 2014255 (1935-09-01), King
patent: 3584670 (1971-06-01), Verdier
patent: 4057089 (1977-11-01), Johannsen
patent: 4254811 (1981-03-01), Devaux
patent: 4282915 (1981-08-01), Fontaine
patent: 4299264 (1981-11-01), Williams
patent: 4356985 (1982-11-01), Yeager et al.

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