Vibration isolating device

Claim 1

A vibration isolating device comprising: first and second rigid fitting members; an elastomeric block member interposed between said first and second fitting members, a diaphragm secured to one of said fitting members; a hollow chamber mainly defined by said elastomeric block member and said diaphragm and containing a vibration-damping liquid therein; and a partition member dividing said hollow chamber into two small liquid chambers and being provided with a restricted passage such that said two small chambers communicate with each other; an auxiliary vibration-damping unit arranged inside one of said two small liquid chambers facing said elastomeric block member, said auxiliary vibration-damping unit comprising an elastic film movable in response to the pressure change inside the hallow liquid chamber, a pair of deformation-restricting members housing said elastic film therebetween, and a flexible diaphragm disposed outside one of said two deformation-restricting members and defining together with a plate member disposed outside said flexible diaphragm a closed air chamber wherein said flexible diaphragm is fixed at its peripheral end between one of said two deformation-resticting members and said plate member.