Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1990-11-13
1993-01-05
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152548, B60C 300
Patent
active
051767686
ABSTRACT:
A pneumatic radial tire for a passenger vehicle, characterized in that at least a portion of a carcass line extending radially outwardly from the maximum width position in a carcass line of a tire fitted to a normal rim and inflated up to its normal internal pressure is configured so as to substantially conform to an equilibrium carcass line expressed by the following equations (1) and (2) calculated by using an internal pressure allotment ratio g(y) of a carcass layer at the tread portion that is obtained by setting the distributional configuration index .alpha. of the following equation (3) at 4 or more, and that grooves are provided in the tread surface such that the groove area ratio thereof ranges from 20 to 30%, wherein: ##EQU1## wherein, provided that a line drawn vertically downwardly from the center of the tread portion to the axle of the tire is y axis of coordinates with the axle of the tire being z axis of coordinates, y.sub.A, y.sub.D, y.sub.C, y.sub.B and .eta. denote as follows:
REFERENCES:
patent: 4527606 (1985-07-01), Kita et al.
"Bohn, Zur Statik und Dynamik des Gurtelreifens", pp. 255-261 ATZ 69 (1967) 8.
Hanada Ryoji
Minami Yukimasa
Noro Masaki
Takasugi Motohide
Ball Michael W.
Krawczyk Nancy T.
The Yokohama Rubber Co. Ltd.
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