Pneumatic Tire and Method for Manufacturing Same

• US 20190329601A1
• Filed: 12/27/2017
• Published: 10/31/2019
• Est. Priority Date: 03/10/2017
• Status: Active Grant

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Chaya, Hitomi
• Granted Patent: US 11,400,757 B2
• Time in Patent Office: Days
• CPC Class Codes: B29D 30/06 Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
• CPC Class Codes: B29D 30/0601 Vulcanising tyres; Vulcanising presses for tyres
• CPC Class Codes: B60C 15/02 Seating or securing beads on rims sealing means between beads and rims of tubeless tyres B60C5/16; means for securing solid tyres on rims B60C7/24
• CPC Class Codes: B60C 2013/007 Thickness
• CPC Class Codes: B60C 2015/061 Dimensions of the bead filler in terms of numerical values or ratio in proportion to section height
• CPC Class Codes: B60C 3/04 characterised by the relative dimensions of the section, e.g. low profile B60C3/06 takes precedence

Abstract

A pneumatic tire includes an annular tread portion extending in a tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction, and the sidewall portions have an average thickness set to range from 1.0 mm to 3.0 mm at a deflection region of each sidewall portion including a tire maximum width position. The bead portions have a bead base width set to range from 115% to 130% of a tread development width of the tread portion.

Claims

1. A pneumatic tire, comprising:

an annular tread portion extending in a tire circumferential direction;

a pair of sidewall portions disposed on both sides of the tread portion;

and

a pair of bead portions disposed inward of the sidewall portions in a tire radial direction;

the sidewall portions having an average thickness set to range from 1.0 mm to 3.0 mm at a deflection region of each sidewall portion including a tire maximum width position; and

the bead portions having a bead base width set to range from 115% to 130% of a tread development width of the tread portion.

2. The pneumatic tire according to claim 1, wherein the bead base width is 1 inch to 3 inches larger than a rim width of a standard rim.

3. The pneumatic tire according to claim 1, wherein a bead filler embedded in each of the bead portions has a height of 30% or less of a tire cross-sectional height.

8. The pneumatic tire according to claim 2, wherein a bead filler embedded in each of the bead portions has a height of 30% or less of a tire cross-sectional height.

4. A method for manufacturing a pneumatic tire comprising an annular tread portion extending in a tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction, the sidewall portions having an average thickness set to range from 1.0 mm to 3.0 mm at a deflection region of each sidewall portion including a tire maximum width position, the method comprising:

vulcanizing the pneumatic tire in a mold formed such that the bead portions have a bead base width set to range from 115% to 130% of a tread development width of the tread portion.

5. The method for manufacturing a pneumatic tire according to claim 4, wherein the mold is formed such that the bead base width is 1 inch to 3 inches larger than a rim width of a standard rim.

6. The method for manufacturing a pneumatic tire according to claim 4, wherein a bead filler embedded in each of the bead portions has a height of 30% or less of a tire cross-sectional height.

7. The method for manufacturing a pneumatic tire according to claim 5, wherein a bead filler embedded in each of the bead portions has a height of 30% or less of a tire cross-sectional height.