Pneumatic tire and tire mold
AssigneeSumitomo Rubber Industries, Ltd.
InventorHokuto KUBO
Life of this patent
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Abstract
A tire 22 includes a pair of bead portions 66 to be fitted to a rim R. Each bead portion 66 includes a bead 30 having a core 52 and an apex 54. An outer surface 68 of the bead portion 66 includes a seat face 70 and a flange face 72 disposed radially inward and axially outward, respectively, of the bead 30, a heel face 74 disposed between the seat face 70 and the flange face 72, and a plurality of vent lines 78 projecting from the heel face 74 and extending in the circumferential direction. A contour of the heel face 74 is represented by an arc on a cross-section, of the tire 22, taken along a plane including a rotation axis of the tire 22, and a radius Rh of the arc is not less than 8 mm and not greater than 15 mm.
Claims18
A pneumatic tire comprising
- a pair of bead portions to be fitted to a rim,
- wherein each bead portion comprises a bead, the bead having a ring-shaped core extending in a circumferential direction and an apex disposed radially outward of the core,
- wherein an outer surface of the bead portion comprises a seat face disposed radially inward of the bead, a flange face disposed axially outward of the bead, a heel face disposed between the seat face and the flange face, and a plurality of vent lines projecting from the heel face and extending in the circumferential direction,
- wherein a contour of the heel face is represented by an arc on a cross-section, of the tire, taken along a plane including a rotation axis of the tire, and
- wherein a radius of the arc is not less than 8 mm and not greater than 15 mm.
Dependencies are inferred from the claim text.