Pneumatic tire

Patent metadata

Field	Value
Publication number	US-12459309-B2
Application number	US-201917262660-A
Country	US
Kind code	B2
Filing date	Jul 17, 2019
Priority date	Jul 24, 2018
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A pneumatic tire includes a sound absorbing member having a band shape. The sound absorbing member is bonded to an inner surface of a tread portion along a tire circumferential direction. The sound absorbing member includes a missing portion at at least one location in the tire circumferential direction. The at least one missing portion is disposed in a range corresponding to a light point in a tire main body. A correction body for correcting weight unbalance is fixed to a tire inner surface in the missing portion within the range corresponding to the light point.

First claim

The invention claimed is:

1 . A pneumatic tire, comprising:
a sound absorbing member having a band shape bonded to an inner surface of a tread portion along a tire circumferential direction; the sound absorbing member comprising a missing portion at at least one location in the tire circumferential direction, the at least one missing portion being disposed in a range corresponding to a light point in a tire main body, the light point being a position where the weight is the lightest on the circumference of the tire main body not including the sound absorbing member, and a correction body for correcting weight unbalance being fixed to a tire inner surface in the missing portion within the range corresponding to the light point, wherein the correction body is fixed to the tire inner surface via an adhesive layer, an adhesive strength of the adhesive layer is in a range of from 3.0 N/mm 2 to 100 N/mm 2 , a volume Vu of the correction body is in a range of from 0.2% to 7.0% to a virtual volume Vs of the missing portion, and a density of a weight Wu of the correction body to a virtual volume Vs of the missing portion is in a range of from 1.0 g/cm 3 to 4.0 g/cm 3 .

2 . The pneumatic tire according to claim 1 , wherein a circumferential length of the missing portion is in a range of from 5% to 20% to a tire inner circumferential length.

3 . The pneumatic tire according to claim 1 , wherein an amount of silicon in a release agent detected in at least a fixed region of the correction body by a fluorescence X-ray analysis method is not greater than 10.0 wt. %.

4 . The pneumatic tire according to claim 1 , wherein a thickness of a release agent detected in at least a fixed region of the correction body by an electron microscope is not greater than 100 μm.

5 . The pneumatic tire according to claim 1 , wherein the adhesive layer is made of a cyanoacrylate-based adhesive.

6 . The pneumatic tire according to claim 1 , wherein the correction body is disposed closer to an inner side in a tire width direction than a ground contact edge.

7 . The pneumatic tire according to claim 1 , wherein the correction body is directly adhered to the tire inner surface.

8 . The pneumatic tire according to claim 1 , wherein a base is inserted between the correction body and the tire inner surface.

9 . The pneumatic tire according to claim 1 , wherein as a tire inner surface roughness in a fixed region of the correction body, an arithmetic mean height Sa is in a range of from 0.3 μm to 15.0 μm, and a maximum height Sz is in a range of from 2.5 μm to 60.0 μm.

10 . The pneumatic tire according to claim 1 , wherein the correction body is a sensor unit.

11 . The pneumatic tire according to claim 1 , wherein the correction body comprises a plurality of correction bodies for correcting weight unbalance fixed to the tire inner surface in the missing portion within the range corresponding to the light point.

12 . The pneumatic tire according to claim 1 , wherein, as a tire inner surface roughness in a fixed region of the correction body, an arithmetic mean height Sa is in a range of from 0.3 μm to 15.0 μm, and a maximum height Sz is in a range of from 31.0 μm to 60.0 μm.

13 . A pneumatic tire, comprising:
a sound absorbing member having a band shape bonded to an inner surface of a tread portion along a tire circumferential direction; the sound absorbing member comprising a missing portion at at least one location in the tire circumferential direction, the at least one missing portion being disposed in a range corresponding to a light point in a tire main body, the light point being a position where the weight is the lightest on the circumference of the tire main body not including the sound absorbing member, and a correction body for correcting weight unbalance being fixed to a tire inner surface in the missing portion within the range corresponding to the light point, wherein the correction body is fixed to the tire inner surface via an adhesive layer, an adhesive strength of the adhesive layer is in a range of from 3.0 N/mm 2 to 100 N/mm 2 , a volume Vu of the correction body is in a range of from 0.2% to 7.0% to a virtual volume Vs of the missing portion, and the correction body is positioned offset from a circumferential direction center of the missing portion.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Naruse Masahiro
• Matsuda Jun
• Hoshiba Takashi

Classifications

• B60C19/003

  Balancing means attached to the tyre · CPC title

• B60C2019/004

  Tyre sensors other than for detecting tyre pressure · CPC title

• B60C23/0493

  for attachment on the tyre · CPC title

• B60C11/243

  Tread wear sensors, e.g. electronic sensors · CPC title

• B60C19/002 Primary

  Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior · CPC title