Patent ID: 6557836
Filing Date: 2003-05-06
Classification: F16F

Abstract:
A liquid-filled vibration isolator comprising:an inner cylinder; a first ring being approximately L-shaped in cross section; a second ring; an orifice ring arranged between the first ring and the second ring, the orifice ring being approximately U-shaped in cross section; an elastic member of rubber material being cylinder-like, the elastic rubber member having an in-cylinder face integrally combining with the inner cylinder and an out-cylinder face integrally combining with the first ring, the orifice ring, and the second ring, and having a first groove formed on the out-cylinder face between the first ring and the orifice ring, and a second groove formed on the out-cylinder face between the orifice ring and the second ring; and an outer cylinder integrally combined with the first ring and the second ring, the outer cylinder and the first groove forming a first liquid chamber, the outer cylinder and the second groove forming a second liquid chamber, the outer cylinder and the orifice ring further forming an orifice path making the first liquid chamber and the second liquid chamber communicate with each other, and the first liquid chamber, the second liquid chamber and the orifice path being filled with liquid, wherein a coating layer integrated with the elastic member is provided in an inner face of the groove around the orifice ring, the outer surface of said coating layer constituting an inner periphery surface or an inner bottom surface opposite to the outer cylinder in the orifice path formed so as to be a convex face approximately circular-arc-like in cross section.