Patent ID: 8302944

Claim:
A pneumatic vibration isolator for isolating vibrations between a sprung mass and an unsprung mass, comprising: an air spring assembly having an air spring head defining an orifice therethrough, an air spring sleeve having a first end sealingly coupled to the air spring head and forming an interior air spring compartment therein, and a pneumatic cylinder assembly sealingly coupled to a second end of the air spring sleeve, the pneumatic cylinder assembly including a piston forming a first volume and a second volume therein, the piston having a shaft extending through the pneumatic cylinder assembly along an axis of the orifice of the air spring head and having an orifice disk affixed to an end thereof, the pneumatic cylinder assembly further including a restrictive orifice in fluid communication with the second volume and an unrestrictive orifice in fluid communication with the first volume and with the interior air spring compartment; an accumulator in fluid communication with the air spring assembly via the orifice in the air spring head; and a high pressure source in fluid communication with the second volume via the restrictive orifice of the pneumatic cylinder assembly.