Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1989-05-25
1991-03-26
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152209R, D12146, B60C 1108
Patent
active
050021095
ABSTRACT:
A tread for a unidirectional pneumatic tire has first and second circumferentially extending zones. The edges of the zones are parallel to the equatorial plane of the tire. Each zone has a width between 40% and 60% of the tread width. The first zone has substantially aligned lateral wide groove segments extending across the width of the first zone. The segments form an angle between 70 and 90 degrees with the equatorial plane. The net-to-gross ratio of the first zone is at least 3% more than that of the second zone. The leading edge of the blocks in the first zone are narrower than the trailing edge. The second zone has substantially aligned lateral wide groove segments extending across the width of the second zone. The segments form an angle between 10 and 45 degrees with the equatorial plane.
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patent: 4545415 (1985-10-01), Lindner et al.
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patent: 4722378 (1988-02-01), Carolla et al.
patent: 4785863 (1988-11-01), Tsuda et al.
Ward's Auto World, Feb., 1989, p. 102.
Modern Tire Dealer, Feb. 1988, p. 46.
Gammon Nathan A.
Hopkins William M.
Koerner James E.
Schmalix Charles K.
Shepler Peter R.
Ball Michael W.
Drayer L. R.
Knable Geoffrey L.
The Goodyear Tire & Rubber Company
Wheeler David E.
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