Patent ID: 7934709

Claim:
A viscous fluid-sealed damper, comprising: a sealing container including a container main body and a lid member closing an opening end of the container main body; and a viscous fluid sealed in the sealing container, the sealing container being fixed to a supporting body and to a supported body to damp vibration of the supported body by virtue of viscous resistance of the viscous fluid, wherein the container main body includes, at an opening end, a flange portion which outwardly protrudes, wherein the viscous fluid-sealed damper further comprises a sealing member including a lock surface portion to be locked to the flange portion and a fixation surface portion to be fixed to the lid member at an outer periphery of the container main body, the fixation surface portion and the lid member being fixed to each other to thereby hold the flange portion between the lock surface portion and the lid member in a compressed state, for sealing the opening end of the container main body in a liquid-tight fashion, wherein the flange portion is provided with a through-hole extending through a thickness of the flange portion, and wherein at least one of the sealing member and the lid member includes a fixation protrusion to be inserted into the through-hole, for fixing the sealing member and the lid member to each other.