Patent ID: 6439551
Filing Date: 2002-08-27
Classification: F16F

Abstract:
A variable spring constant type damper filled with a viscous fluid in which a container is constituted by a stirring portion having an opening into which a shaft of a supported body is inserted, a cylindrical portion made of a rigid resin or a metal, a flexible portion made of a rubber-like elastic body connecting the opening of the stiring portion for insertion of the shaft and the cylindrical portion, the container being filled with the viscous fluid and sealed with a cap, and the vibration damping is performed with a viscous resistance which is caused by the stirring portion traveling in the viscous fluid in response to a vibration from the external surface of the damper,wherein the flexible portion which is deformed with traveling of the stirring portion is comprised of a thick-walled portion and a thin-walled portion, a ratio of the thickness of the thin-walled portion of the flexible portion to the thickness of the thick-walled portion of the flexible portion is 1.0:1.1 to 1.0:5.0.