US 12,220,951 B2
Pneumatic tire
Tatsuya Sasaki, Kobe (JP); Tsukasa Yano, Kobe (JP); Rena Onitsuka, Kobe (JP); Masaki Terashima, Kobe (JP); Yusuke Sueyoshi, Kobe (JP); Hiroyuki Nakayama, Kobe (JP); and Junya Sueno, Kobe (JP)
Assigned to Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Filed by Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Filed on Sep. 26, 2023, as Appl. No. 18/474,884.
Claims priority of application No. 2022-168895 (JP), filed on Oct. 21, 2022; application No. 2022-168896 (JP), filed on Oct. 21, 2022; application No. 2022-168898 (JP), filed on Oct. 21, 2022; and application No. 2022-168900 (JP), filed on Oct. 21, 2022.
Prior Publication US 2024/0131866 A1, Apr. 25, 2024
Prior Publication US 2024/0227446 A9, Jul. 11, 2024
Int. Cl. B60C 5/14 (2006.01); B60C 3/04 (2006.01); B60C 11/00 (2006.01); B60C 11/01 (2006.01); B60C 9/04 (2006.01); B60C 11/03 (2006.01); B60C 13/00 (2006.01); B60C 13/02 (2006.01); B60C 15/00 (2006.01)
CPC B60C 3/04 (2013.01) [B60C 5/14 (2013.01); B60C 11/0083 (2013.01); B60C 11/01 (2013.01); B60C 2009/0466 (2013.01); B60C 2011/0016 (2013.01); B60C 2011/0025 (2013.01); B60C 11/0332 (2013.01); B60C 13/001 (2013.01); B60C 13/02 (2013.01); B60C 15/0036 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pneumatic tire comprising:
a tread portion;
a pair of sidewall portions;
a pair of bead portions;
a carcass extending between the bead portions; and
an inner rubber extending between the bead portions, on the inside of the carcass, wherein
the inner rubber comprises a first portion extending through the tread portion with a first thickness, and a second portion extending through the sidewall portions with a second thickness;
the first thickness is more than the second thickness;
the tread portion has a ground contacting surface between a first tread edge and a second tread edge;
the sidewall portions respectively have outer surfaces extending radially inward from the first tread edge and the second tread edge, respectively;
the ground contacting surface has a tire equator at the central position in the tire axial direction between the first tread edge and the second tread edge; and
the outer surfaces have tire maximum width positions which are the outermost positions in the tire axial direction,
wherein
in a meridian cross section of the tire under a normal state in which the tire is mounted on a regular rim, inflated to a normal internal pressure, and loaded with no load, when
a first reference point is defined as an intersection of a bead base line with a straight line extending parallel to the tire radial direction through the tire equator;
a second reference point is defined as an intersection of a straight line extending parallel to the tire axial direction through the tire equator with a straight line extending parallel to the tire radial direction through the tire maximum width position;
a reference line segment is defined as a strain line extending between the first reference point and the second reference point;
a shoulder reference point is defined as an intersection of the reference line segment with the ground contacting surface or the outer surface; and
a shoulder line segment is defined as a straight line connecting between the first reference point and the shoulder reference point,
then
the length of the shoulder line segment is in a range from 85.9% to 89.3% of the length of the reference line segment.