Pneumatic tire

• US 10,286,737 B2
• Filed: 11/21/2014
• Issued: 05/14/2019
• Est. Priority Date: 11/21/2013
• Status: Active Grant

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Tanno, Atsushi
• Primary Examiner(s): Daniels, Matthew J
• Assistant Examiner(s): Kim, Yunju
• Application Number:
  US15/038,331
• Publication Number:
  US 20160288587A1
• Time in Patent Office: 1,635 Days
• Field of Search: 152153, 152450, 152564
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: B60C 11/00 Tyre tread bands; Tread patterns; Anti-skid inserts
• CPC Class Codes: B60C 13/00 Tyre sidewalls; Protecting, decorating, marking, or the like, thereof B60C17/08 takes precedence; tyre shoulders B60C11/01; removable tyre sidewall trim rings B60B7/01
• CPC Class Codes: B60C 15/00 Tyre beads, e.g. ply turn-up or overlap
• CPC Class Codes: B60C 19/002 Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
• CPC Class Codes: B60C 23/04 mounted on the wheel or tyre
• CPC Class Codes: B60C 23/0493 for attachment on the tyre

Abstract

A pneumatic tire of the present technology includes a tread portion, sidewall portions, bead portions, and a belt-shaped sound-absorbing member bonded to a region on a tire inner surface corresponding to the tread portion along the tire circumferential direction with an adhesive layer disposed between the tire inner surface and the sound-absorbing member. In such a pneumatic tire, an air agitation portion formed by an interruption in the sound-absorbing member is disposed in at least one location on the tire circumference.

Claims

1. A pneumatic tire comprising:

an annular-shaped tread portion extending in a tire circumferential direction;

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

a pair of bead portions disposed on inner sides of the sidewall portions in a tire radial direction; and

a belt-shaped sound-absorbing member bonded to a region on a tire inner surface corresponding to the tread portion along the tire circumferential direction with an adhesive layer disposed between the tire inner surface and the sound-absorbing member, wherein

air agitation portions formed by an interruption in the sound-absorbing member is disposed in a plurality of locations on a tire circumference, wherein the air agitation portions have different lengths from each other in the tire circumferential direction and an electronic device is installed in one of the air agitation portions; and

the sound-absorbing member extends in the tire circumferential direction, the sound-absorbing member having an uniform thickness at least over a range corresponding to an adhering surface along a cross section orthogonal to a longitudinal direction of the sound-absorbing member, and a shape of the cross section is constant in the longitudinal direction.

2. The pneumatic tire according to claim 1, wherein

the air agitation portions are provided in three to five locations on the tire circumference.

3. The pneumatic tire according to claim 1, wherein

the length of the air agitation portions in the tire circumferential direction is in a range of from 0.5 to 10 times a height of the sound-absorbing member.

4. The pneumatic tire according to claim 1, wherein

a ratio of a volume of the sound-absorbing member with respect to a volume of a space formed inside the tire when the tire is assembled to a rim is larger than 20%.

5. The pneumatic tire according to claim 1, wherein

hardness of the sound-absorbing member is from 60 N to 170 N, and tensile strength of the sound-absorbing member is from 60 kPa to 180 kPa.

6. The pneumatic tire according to claim 1, wherein

the adhesive layer is formed by a double-sided tape, and peeling adhesive strength of the adhesive layer is in a range of from 8 N/20 mm to 40 N/20 mm.

7. The pneumatic tire according to claim 1, wherein

the sound-absorbing member is formed of a porous material having open cells.

8. The pneumatic tire according to claim 7, wherein

the porous material is urethane foam.

9. The pneumatic tire according to claim 2, wherein

the length of the air agitation portions in the tire circumferential direction is in a range of from 0.5 to 10 times a height of the sound-absorbing member.

10. The pneumatic tire according to claim 9, wherein

a ratio of a volume of the sound-absorbing member with respect to a volume of a space formed inside the tire when the tire is assembled to a rim is larger than 20%.

11. The pneumatic tire according to claim 10, wherein

hardness of the sound-absorbing member is from 60 N to 170 N, and tensile strength of the sound-absorbing member is from 60 kPa to 180 kPa.

12. The pneumatic tire according to claim 11, wherein

the adhesive layer is formed by a double-sided tape, and peeling adhesive strength of the adhesive layer is in a range of from 8 N/20 mm to 40 N/20 mm.

13. The pneumatic tire according to claim 12, wherein

the sound-absorbing member is formed of urethane foam having open cells.

14. A pneumatic tire comprising:

an annular-shaped tread portion extending in a tire circumferential direction;

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

a pair of bead portions disposed on inner sides of the sidewall portions in a tire radial direction; and

a belt-shaped sound-absorbing member bonded to a region on a tire inner surface corresponding to the tread portion along the tire circumferential direction with an adhesive layer disposed between the tire inner surface and the sound-absorbing member, wherein

air agitation portions formed by an interruption in the sound-absorbing member are provided in a plurality of locations on the tire circumference, the air agitation portions having different lengths from each other in the tire circumferential direction.