Fluid-filled elastic mount having double-layered flexible membrane separating fluid chamber and vacuum-receiving chamber

Claim 1

A fluid-filled elastic mount for flexibly connecting two members, comprising: a first support member and a second support member which are spaced apart from each other and respectively fixed to the two members to be flexibly connected; an elastic body interposed between said first and second support members for elastically connecting the first and second support members; means for defining a plurality of fluid chambers filled with a non-compressible fluid and communicating with each other through at least one orifice passage; a flexible membrane partially defining a corresponding one of at least one of said plurality of fluid chambers; means for forming an air-tight operating chamber on one of opposite sides of said flexible membrane remote from said corresponding one fluid chamber; said flexible membrane comprising a fluid-impermeable first flexible layer which is made of a first material corrosion-resistant to said non-compressible fluid, and a fluid-impermeable second flexible layer which is made of a second material corrosion-resistant to gasoline, said first material being different from said second material, said first and second flexible layers being superposed on and held in direct contact with each other such that said first flexible layer is exposed to said corresponding one fluid chamber while said second flexible layer is exposed to said operating chamber; and pressure control means for applying a vacuum pressure to aid operating chamber so as to restrict elastic deformation of said flexible membrane.