Vibration and/or shock attenuating fluid mount or the like

Claim 1

A fluid mount or the like for interconnecting spaced members and attenuating the transmission of vibration and/or shock forces therebetween comprising: a double-walled housing having a central axis and laterally spaced inner and outer walls, said walls surrounding said axis and an inner portion of said housing; a displacer within said inner housing portion; said housing and said displacer being adapted to be connected to respective ones of said spaced members and to undergo relative movement along said axis during operation of said mount; flexible means disposed within said housing and defining therewith a plurality of variable volume fluid chambers, said chambers including a first chamber containing hydraulic fluid displaceable between first and second sections of said chamber by said relative movement between said housing and said displacer, and said chambers including a second chamber containing gaseous fluid; at least one of said sections of said first chamber being disposed within said inner portion of said housing and surrounding said one of said sections of said first chamber; said flexible means including a rolling diaphragm element defining a common boundary between said first and second fluid chamber; a flow control means intermediate said first and second sections of said first fluid chamber wherein said flow control means includes a decoupler assembly having a decoupler chamber and first and second port means respectively interconnecting said decoupler chamber with said first and second sections of said first fluid chamber, and a movable decoupler disc disposed within said decoupler chamber for movement between first and second extreme positions respectively adjacent said first and second port means, said disc being effective during large amplitude excitation of said mount to restrict the flow of fluid through said decoupler chamber to a greater extent when in said first of its said extreme positions than when in said second of said extreme positions thereof, and said disc moving freely between positions intermediate said extreme positions thereof when the amplitude of said excitation forces is below said predetermined magnitude.