Pneumatic tire
AssigneeBridgestone Corporation
InventorToshiki Nagai
Life of this patent
Estimating the term…
Abstract
A pneumatic tire, comprising at least sidewall portions and rim guards each provided at the corresponding sidewall portion, wherein: in a cross section in the width direction of the tire assembled with a prescribed rim, an outer contour line, of the rim guard, situated on the outer side in the tire radial direction than the radially outermost peak of the rim guard has an arcuate configuration of which the center of curvature is located on the external side of the tire; radius of curvature R of the outer contour line is in the range of 5 mm≦R≦40 mm; and provided that H represents a distance in the tire radial direction measured from the radially innermost peak to the outermost position in the tire radial direction of a rim flange, 2 mm≦H≦40 mm.
Claims8
A tire-rim assembly of a pneumatic tire and a prescribed rim, the tire comprising at least sidewall portions and rim guards, the rim guards each being provided at the corresponding sidewall portion to protrude on the outer side in the tire width direction, wherein:
- in a cross section of the tire in the width direction thereof in a state where the tire has been assembled with the prescribed rim and inflated at prescribed internal pressure with no load thereon, each rim guard has at least one peak;
- an outer contour line, of the rim guard, situated on the outer side in the tire radial direction than the outermost peak in the tire radial direction of the at least one peak, has an arcuate configuration of which the center of curvature is located on the external side of the tire;
- radius of curvature R of the outer contour line is in the range of 5 mm≦R<8 mm;
- provided that H represents a distance in the tire radial direction measured from the innermost peak in the tire radial direction of the at least one peak of the rim guard to the outermost position in the tire radial direction of a rim flange, 10 mm<H≦40 mm;
- and
- in the cross section of the tire in the width direction thereof, an outer contour line of a portion, on the inner side in the tire radial direction than the innermost peak to the outermost position in the tire radial direction of the rim flange, of the rim guard is constituted exclusively of a curved configuration concaved from the outer side toward the inner side in the tire width direction.
A tire-rim assembly of a pneumatic tire and a prescribed rim, the tire comprising at least sidewall portions, a pair of bead cores, a pair of bead fillers respectively provided on the outer side in the tire radial direction of the bead cores, and rim guards, the rim guards each being provided at the corresponding sidewall portion to protrude on the outer side in the tire width direction, wherein:
- in a cross section of the tire in the width direction thereof in a state where the tire has been assembled with the prescribed rim and inflated at prescribed internal pressure with no load thereon, each rim guard has at least one peak;
- an outer contour line, of the rim guard, situated on the outer side in the tire radial direction than the outermost peak in the tire radial direction of the at least one peak, has an arcuate configuration of which the center of curvature is located on the external side of the tire;
- radius of curvature R of the outer contour line is in the range of 5 mm≦R<10 mm;
- provided that H represents a distance in the tire radial direction measured from the innermost peak in the tire radial direction of the at least one peak of the rim guard to the outermost position in the tire radial direction of a rim flange, 10 mm<H≦40 mm;
- in the cross section of the tire in the width direction thereof, an outer contour line of a portion, on the inner side in the tire radial direction than the innermost peak to the outermost position in the tire radial direction of the rim flange, of the rim guard is constituted exclusively of a curved configuration concaved from the outer side toward the inner side in the tire width direction;
- and
- wherein, in the cross section of the tire in the width direction thereof in a state where the tire has been assembled with the prescribed rim and inflated at prescribed internal pressure with no load thereon, the outermost end in the tire radial direction of each bead filler is situated within a range in the tire radial direction defined, when the outermost position in the tire radial direction of the rim flange is regarded as a reference point, from a position 5 mm on the inner side in the tire radial direction of the reference point to a position 40 mm on the outer side in the tire radial direction of the reference point.
Dependencies are inferred from the claim text.