Heavy-duty tire having ground-contact surface shape

Details Heavy-duty tire having ground-contact surface shape Heavy-duty tire having ground-contact surface shape

2002-12-16

2008-12-30

Maki, Steven D (Department: 1791)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209140, C152S209180, C152S538000

Reexamination Certificate

active

07469731

ABSTRACT:
In a ground-contact surface shape of a tire, when a tangent angle formed between an axial direction of the tire and a tangent X at each point P on a profile line of the tire is defined as θ, a tangent angle θ1in a ground-contact end point Pd is 25° or smaller. When a minimum value of the tangent angle θ in a region Y which is separated away from a tire equator C by a distance in a range of not less than 0.4 times but not more than 0.7 times a half of the ground-contact width of the tread is defined as θ2, and a tangent angle at a 0.9 times point Pq which is separated away from the tire equator C by a distance of 0.9 times the half of the ground-contact width of the tread is defined as θ3, a difference (θ3−θ2) is set in a range of not less than −10° but not more than +10°.

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