Patent ID: 6354578
Filing Date: 2002-03-12
Classification: B60S,F16F

Abstract:
An elastic vibration absorber provided between a bracket supporting a wiper device and a vehicle body frame, wherein the vibration absorber is fitted in an attachment opening in the bracket and is secured to the body frame with a securing member, the vibration absorber comprising:a cylinder fitted in the attachment opening and having a through hole through which the securing member is inserted, wherein the cylinder has a pair of contact surfaces at opposite axial ends and a pair of thin portions therebetween with one contact surface contacting the receiving surface of the securing member and the other contact surface contacting the body frame with a minimum radius defined by an outer periphery of each thin portion smaller than a radius defined by a maximum outer diameter section of each contact surface; a pair of flanges provided near the opposite axial ends of the cylinder to clamp the bracket, wherein one flange is located between the bracket and a receiving surface provided for the securing member, the other flange is located between the bracket and the body frame, and each flange has an arched, axial cross-sectional shape, wherein a portion of each flange located between the cylinder and a radial intermediate location is inclined to extend away from the bracket in the radially outward direction, and a portion of each flange located between the radial intermediate location and the periphery of the flange is inclined to extend toward the bracket in the radially outward direction, and a ridge is formed at the radial intermediate location of each flange; an outer abutting portion provided along the periphery of each flange for abutting against the bracket around the attachment opening; and an intermediate abutting portion formed at the ridge of each flange, wherein each intermediate abutting portion projects in a direction opposite to a direction in which the associated outer abutting portion projects, wherein one intermediate abutting portion abuts against the receiving surface of the securing member and the other abuts against the vehicle body frame.