Fluid-filled vibration damping device

A fluid-filled vibration damping device comprising:

• a first fluid chamber;
• a second fluid chamber;
• a partition having a housing area and arranged between the first fluid chamber and the second fluid chamber;
• and
• a movable film having a first surface and a second surface while being housed in the housing area, the movable film comprising:
• a central retainer sandwiched and held by the partition;
• a plurality of spoke-shaped retainers extending radially outward from the central retainer, the first surface of the movable film being held in a state of being overlapped on a wall inner surface of the housing area of the partition by the central retainer and the spoke-shaped retainers;
• an elastic deformation zone provided circumferentially between the spoke-shaped retainers, the elastic deformation zone being allowed to deform in a direction away from the wall inner surface of the housing area on which the movable film is overlapped based on a differential of fluid pressures applied to the first surface and the second surface of the movable film;
• and
• a cushion ridge provided in the elastic deformation zone, the cushion ridge projecting from the second surface of the movable film while extending radially outward from the central retainer, wherein
• a projection height of the cushion ridge is varied in a direction of extension of the cushion ridge such that a timing of contact with an opposing wall inner surface in the housing area varies depending on an amount of deformation of the elastic deformation zone.