Pneumatic tire with geodesic belt
AssigneeThe Goodyear Tire & Rubber Company
InventorsKiyoshi Ueyoko, Luis Antonio Cabrera, Loyda Mercedes Yerashunas, John Joseph Slivka, James Michael Hart
Life of this patent
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Abstract
A tire having a modified geodesic belt is described. The ideal geodesic belt path is modified to select the centerline belt angle and to avoid excessive build up of the belt at the belt edges. The method includes the step of calculating the minimum three dimensional distance from one belt edge to the other belt edge preferably using dynamic successive approximation.
Claims16
A pneumatic tire having a carcass and a belt reinforcing structure, the belt reinforcing structure comprising:
- a first belt layer having cords arranged at an angle of 5 degrees or less with respect to the midcircumferential plane, and a second belt layer formed of a plurality of geolines joined together, each geoline extending between a first belt edge and a second belt edge, wherein each geoline is tangent to the first belt edge and the second belt edge, and is formed in a three dimensional minimum path, wherein each geoline is formed by calculating a three dimensional minimal distance path L from one belt edge to the other belt edge using the following equation:
- L=Σ(SQRT(X2+Y2+Z2)), for ψ=0 to AG, Where Z=R*δψ,
- wherein the second belt layer is wider than the first belt layer and is located radially outward of the first belt layer.
A pneumatic tire having a carcass and a belt reinforcing structure, the belt reinforcing structure comprising:
- a belt layer formed of a plurality of geolines joined together, each geoline extending between a first belt edge and a second belt edge, wherein each geoline is tangent to the first belt edge and the second belt edge, and is formed in a three dimensional minimum path, wherein each geoline is formed by calculating a three dimensional minimal distance path L from one belt edge to the other belt edge using the following equation:
- L=Σ(SQRT(X2+Y2+Z2)), for ψ=0 to AG, Where Z=R*δψ.
Dependencies are inferred from the claim text.