Patent ID: 7886789

Claim:
A noise damper in combination with a pneumatic tire, comprising an annular body disposed in a tire hollow, wherein the axial width of the annular body is constant or alternatively gradually decreases from the radially outer end towards the radially inner end, and the annular body is made of a spongy material having a specific gravity of from 0.005 to 0.060, a cross sectional area (S) of from 1 to 60 cm 2 , a radial height (H) of from 0.5 to 6.0 cm, a base width (W) at the radially outer end of from 1 to 25 cm, and wherein said annular body has no ends forming a junction and has an outside diameter (RO) of from 1.01 to 1.10 times the maximum inside diameter (RT) of the tire hollow, whereby the noise damper is substantially fixed to the inside of the pneumatic tire by means of an interference fit there between without utilizing an adhesive agent.