Patent ID: 7703858
Filing Date: 2010-04-27
Classification: B60C

Abstract:
1. A tire noise reducing system comprising a wheel rim, a pneumatic tire mounted on the wheel rim and forming a tire cavity, and a noise damper disposed in the tire cavity and made from a sponge material whose total volume is in a range of from 0.4 to 20 % of a volume of the tire cavity, wherein the damper has a base end surface fixed to the inside of a tread portion of the tire and a top end surface opposite the base end surface, and in a tire meridian section, a maximum thickness of the damper between the base end surface and the top end surface is in a range of from 1.0 to 4.5 cm, the width of the base end surface is more than the maximum thickness, the width of the damper is not increased in the direction from the base end surface to the top end surface, and each of side faces of the damper defined as extending from the edges of the base end surface to the edges of the top end surface is at least partially provided with an aslant portion inclined at an angle of from 30 to 75 degrees with respect to the base end surface, wherein at least a part of said aslant portion is curved concavely.