Fluid filled vibration isolator

Claim 1

A vibration isolating device comprising a housing with at least one flexible wall portion movable in response to vibrations imparted thereto, a partition dividing the housing into at least two chambers for containing a working fluid displaceable in response to movement of the flexible wall, an inertia track passageway providing fluid communication between the chambers, and decoupling means cooperable with the inertia track passageway to control fluid flow between the chambers, the decoupling means comprises: a singular compartment having a plurality of ports fluidly interconnecting said chambers, a plurality of wafers contained within said singular compartment occupying less than said volume of the compartment and loosely contained in said compartment for providing therethrough a fluid flow path having a variable resistance to flow between the chambers and each of said plurality of wafers, each of the wafers being in a contiguous relationship to an adjacent wafer, said plurality of wafers being displaceable by said fluid between a dispersed condition substantially disengaged from said compartment to provide low resistance to fluid flow between the chambers and a compacted condition engaged with said compartment to provide high resistance to fluid flow between the chambers, whereby the plurality of wafers cooperated with the compartment and fluid to couple and decouple the inertia track passageway without generating audible noise.