Multi-stage damping assembly

An assembly for multi-stage damping comprising;

• a damping unit (20) including a wall (22) defining an inner surface and an outer surface extending about an axis (A) between a base portion (24) and a top portion (26);
• a partition (28) spaced between said base portion (24) and said top portion (26) and extending from said inner surface of said wall (22) defining a first chamber (30) between said partition (28) and said top portion (26) and a second chamber (32) between said partition (28) and said base portion (24), said partition (28) having an internal holding wall (34) defining a holding chamber;
• a decoupler (36) is disposed within said holding chamber and has a radius extending between a center point (C) and an outer ring (38), said outer ring (38) engaging said internal holding wall (34), said decoupler (36) having a first surface (40) opposite a second surface (42) for preventing fluid transfer between said chambers (30, 32);
• said decoupler (36) defining a circular zone (68) extending about said center point (C) for flexing between said chambers (30, 32);
• and
• said decoupler (36) defining an annular zone (70) surrounding said circular zone (68) extending inwardly from said outer ring (38) to define a ring shape, said annular zone (70) flexing with said circular zone (68) in a first mode (72) to maximize the potential volume of displacement and said annular zone (70) flexing independently of said circular zone (68) in a second mode (74) to decrease the potential volume of displacement of said decoupler (36) between said first chamber (30) and said second chamber (32).