Pneumatic tire
AssigneeBridgestone Corporation
InventorHiroaki Koga
Life of this patent
Estimating the term…
Abstract
A pneumatic tire 1 according to the present invention is summarized as, in a carcass line 5C passing through the center of the carcass layer 5, an outer carcass line 5C-1 extending from a position M where a width TW of the tire is maximum along an outer side in the radial direction of the tire extends along a natural equilibrium profile curve having a shape achieved when a tension in the carcass layer 5 is balanced when the tire mounted on a standard rim is inflated to a standard inner pressure, and a belt normal-line distance BL and a tread normal-line distance TL in a cross over area is constant or becomes shorter from a tire equatorial line CL toward an outside in a tread width direction, the crossover area being an area between the tire equatorial line CL and a lamination end D.
Claims6
A pneumatic tire comprising:
- paired bead parts each including at least a bead core and a bead filler;
- and at least a carcass layer, a belt layer and a tread contact patch arranged from an inside to an outside in a radial direction of the tire, wherein
- the belt layer includes:
- a first belt layer in which first cords are arranged obliquely relative to a tire circumferential direction;
- and a second belt layer in which second cords are arranged obliquely relative to the tire circumferential direction and are arranged in such a way as to cross the first cord,
- in a carcass line passing through the center of the carcass layer, an outer carcass line extending from a position where a width of the tire is maximum along an outer side in the radial direction of the tire extends along a natural equilibrium profile curve having a shape achieved when a tension in the carcass layer is balanced when the tire mounted on a standard rim is inflated to a standard inner pressure, and
- each of a belt normal-line distance and a tread normal-line distance in a crossover area is constant or becomes shorter from a tire equatorial line toward an outside in a tread width direction, the belt normal-line distance being a distance from the belt layer to the outer carcass line on a line normal to the carcass line, the tread normal-line distance being a distance from the tread contact patch to the outer carcass line on the normal line, the crossover area being an area where the first belt layer and the second belt layer cross each other between the tire equatorial line and a lamination end.
Dependencies are inferred from the claim text.