Patent ID: 7549619

Claim:
A viscous fluid-filled damper for damping vibrations, comprising: a sealed container, comprising: a soft portion exhibiting rubberlike elasticity; a first hard portion on a supporting body side which is mounted on the supporting body; and a second hard portion on a supported body side which is mounted on the supported body accommodated in the supporting body; and a viscous fluid filling the sealed container, the viscous fluid-filled damper being interposed between the supporting body and the supported body, one of the first hard portion on the supporting body side and the second hard portion on the supported body side having a shaft mounting portion connected to a shaft provided on one of the supporting body and the supported body, wherein the shaft mounting portion is provided with a shaft receiving hole with a closed end and an open end for receiving the shaft, and a window hole intersecting the shaft receiving hole and having a hole port opening to a lateral surface of the shaft mounting portion, and the window hole is located to make insertion of the shaft visually recognizable.