Tire cavity resonance restricting device and pneumatic tire

A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;

• a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section;
• and
• an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
• wherein the non-attachment portion of the elastic fixing member is greater in mass than the attachment portion thereof,
• wherein the non-attachment portion of the elastic fixing member is greater in width than the attachment portion thereof.

A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising:

• a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section;
• and
• an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
• wherein the non-attachment portion of the elastic fixing member is greater in mass than the attachment portion thereof,
• wherein the attachment portion of the elastic fixing member has holes formed therein.

A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;

• a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section;
• and
• an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion,
• wherein the cross-sectional area changing member attached to the elastic fixing member has through holes formed there in.

A tire cavity resonance restricting device to be mounted on an inner surface of a tread portion facing to a cavity of a pneumatic tire, comprising;

• a cross-sectional area changing member for changing a cross-sectional area of the cavity in tire meridian cross section;
• and
• an elastic fixing member in a form of a ring for fixing the cross-sectional area changing member to the inner surface of the tread portion, the elastic fixing member having an attachment portion to which the cross-sectional area changing member is attached and a non-attachment portion to which the cross-sectional area changing member is not attached,
• wherein a mass adjusting element is continuously provided on the non-attachment portion along the circumferential direction throughout the full length of the non-attachment portion.