Tire

Patent metadata

Field	Value
Publication number	US-2016200150-A1
Application number	US-201614987449-A
Country	US
Kind code	A1
Filing date	Jan 4, 2016
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A normal rim 48 includes a flange 54 . The flange 54 forms an outer circumferential bent surface 60 that is bent with a radius Rr of curvature. A first reference line L 1 represents a straight line that extends through a center point Pr of the radius Rr, and that is tilted by an angle of 45°. In a state where the tire is inflated to a normal internal pressure and is under 120% of a normal load, Te represents a thickness from an inner cavity surface to an outer surface of the clinch, Tf 1 represents a thickness of a filler, Tc 1 represents a thickness of the clinch, Ta 1 represents a thickness obtained by the thickness Tf 1 and the thickness Tc 1 being added, and the thicknesses are measured along the first reference line L 1 , and a ratio (Ta 1 /Te) of the thickness Ta 1 to the thickness Te is greater than 0.4.

First claim

What is claimed is:

1 . A pneumatic tire comprising:
a tread; a pair of sidewalls; a pair of clinches; a pair of beads; a carcass; and a pair of fillers, wherein each sidewall extends almost inward from an end of the tread in a radial direction, each clinch is disposed inward of a corresponding one of the sidewalls in the radial direction, each bead is disposed inward of a corresponding one of the clinches in an axial direction, each bead includes a core, and an apex that extends outward from the core in the radial direction, the carcass extends along inner sides of the tread and the sidewalls, and is extended on and between one of the beads and the other of the beads, the carcass includes a carcass ply, the carcass ply is turned up around the core from an inner side toward an outer side in the axial direction, and the carcass ply includes: a main portion disposed inward of the beads in the axial direction; and turned-up portions disposed outward of the beads in the axial direction, each filler is disposed between a corresponding one of the clinches and a corresponding one of the turned-up portions in the axial direction, a normal rim to which the tire is mounted, includes a flange, the flange forms an outer circumferential bent surface that is bent with a radius Rr of curvature, a radially outer side edge that contacts a corresponding one of the clinches is positioned on the outer circumferential bent surface, a first reference line L 1 represents a straight line that extends through a center point Pr of a circle represented by the radius Rr of curvature, and that is tilted, by an angle of 45° relative to the axial direction, from an inner side in the radial direction toward an outer side in the radial direction and toward an inner side in the axial direction, in a state where the tire is mounted to the normal rim, is inflated to a normal internal pressure, and is under 120% of a normal load, Te represents a thickness from an inner cavity surface to an outer surface of a corresponding one of the clinches, Tf 1 represents a thickness of each filler, Tc 1 represents a thickness of each clinch, Ta 1 represents a thickness obtained by the thickness Tf 1 and the thickness Tc 1 being added, and the thicknesses Te, Tf 1 , Tc 1 , and Ta 1 are measured along the first reference line L 1 , and a ratio (Ta 1 /Te) of the thickness Ta 1 to the thickness Te is greater than 0.4.

2 . The tire according to claim 1 , wherein a ratio (Tf 1 /Tc 1 ) of the thickness Tf 1 to the thickness Tc 1 is greater than or equal to 0.3 and not greater than 3.0.

3 . The tire according to claim 1 , wherein
an outer end, of each turned-up portion, in the radial direction is disposed outward of the first reference line L 1 in the radial direction, and when Dr 1 represents a distance from the inner cavity surface to a center point Pp of a thickness of each turned-up portion along the first reference line L 1 , a ratio (Dr 1 /Te) of the distance Dr 1 to the thickness Te is less than or equal to 0.6.

4 . The tire according to claim 1 , wherein
a second reference line L 2 represents a straight line that extends through a center of the core in the axial direction, in a state where the tire is mounted to the normal rim, is inflated to a normal internal pressure, and is under 120% of a normal load, Tp 2 represents a thickness of the carcass ply, Tf 2 represents a thickness of each filler, Tc 2 represents a thickness of each clinch, Ta 2 represents a thickness obtained by the thickness Tf 2 and the thickness Tc 2 being added, and the thicknesses Tp 2 , Tf 2 , Tc 2 , and Ta 2 are measured along the second reference line L 2 , and the thickness Ta 2 is greater than or equal to the thickness Tp 2 , and is not greater than three times the thickness Tp 2 .

5 . The tire according to claim 4 , wherein the thickness Tf 2 is greater than 0, and is less than or equal to the thickness Tc 2 .

6 . The tire according to claim 1 , wherein,
when Tp 1 represents a thickness of the carcass ply, and the thickness Tp 1 is measured along the first reference line L 1 , the thickness Ta 1 is greater than or equal to twice the thickness Tp 1 .

7 . The tire according to claim 1 , wherein a radially outer end of the apex is disposed inward of the first reference line L 1 in the radial direction.

8 . The tire according to claim 7 , comprising a strip,
the strip is layered over the apex, the strip extends outward from an end of the apex in the radial direction, and a radially outer end of the strip is disposed outward of the first reference line L 1 in the radial direction.

9 . The tire according to claim 1 , wherein an inner end of each filler in the radial direction is disposed inward of an outer end of the core.

10 . A pneumatic tire comprising:
a tread; a pair of sidewalls; a pair of clinches; a pair of beads; a carcass; and a pair of fillers, wherein each sidewall extends almost inward from an end of the tread in a radial direction, each clinch is disposed inward of a corresponding one of the sidewalls in the radial direction, each bead is disposed inward of a corresponding one of the clinches in an axial direction, each bead includes a core, and an apex that extends outward from the core in the radial direction, the carcass extends along inner sides of the tread and the sidewalls, and is extended on and between one of the beads and the other of the beads, the carcass includes a carcass ply, the carcass ply is turned up around the core from an inner side toward an outer side in the axial direction, and the carcass ply includes: a main portion disposed inward of the beads in the axial direction; and turned-up portions disposed outward of the beads in the axial direction, each filler is disposed between a corresponding one of the clinches and a corresponding one of the turned-up portions in the axial direction, a normal rim to which the tire is mounted, includes a flange, the flange forms an outer circumferential bent surface that is bent with a radius Rr of curvature, a radially outer side edge that contacts a corresponding one of the clinches is positioned on the outer circumferential bent surface, a first reference line L 1 represents a straight line that extends through a center point Pr of a circle represented by the radius Rr of curvature, and that is tilted, by an angle of 45° relative to the axial direction, from an inner side in the radial direction toward an outer side in the radial direction and toward an inner side in the axial direction, a fourth reference line L 4 represents a straight line that extends, through a center of the core, parallel to the first reference line L 1 , a fifth reference line L 5 represents a straight line that extends such that the straight line and the fourth reference line L 4 are line-symmetric with respect to the first reference line L 1 , in a state where the tire is mounted to the normal rim, is inflated to a normal internal pressure, and is under 120% of a normal load, each filler extends from a portion inward of the first reference line L 1 in the radial direction to a portion outward of the fifth reference line L 5 in the radial direction, and a ratio (Sf/St) of an area Sf of each filler between the first reference line L 1 and the fifth reference line L 5 relative to an area St of the tire between the first reference line L 1 and the fifth reference line L 5 , is less than or equal to 0.3, and an end of the apex is disposed inward of the first reference line L 1 in the radial direction.

11 . The tire according to claim 10 , wherein the end of the apex is dispo

Assignees

• Sumitomo Rubber Ind

Inventors

• Yamamoto Aiko
• Mori Kazuma

Classifications

• B60C2015/061

  Dimensions of the bead filler in terms of numerical values or ratio in proportion to section height · CPC title

• B60C15/0206

  using inside rim bead seating, i.e. the bead being seated at a radially inner side of the rim · CPC title

• B60C15/0009

  features of the carcass terminal portion · CPC title

• B60C15/0607

  comprising several parts, e.g. made of different rubbers · CPC title

• B60C2015/0621

  adjacent to the carcass turnup portion · CPC title