Kaardal & Associates, PC
Air suspension system
 An air suspension system including an air spring that is mounted underneath a frame of the trailer forward of an axle of the trailer at one end of the axle. The air spring is supported under the frame by a lower support that supports a bottom of the air spring and an upper support that supports a top of the air spring. The lower support is connected to the frame forward of the air spring and is further connected to the axle, while the upper support is disposed between the top of the air spring and the frame. An identical air spring arrangement is provided at the opposite end of the axle. 
Timbren Industries Incorporated
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Dennis A. Jerry L. Brian L.
Beukelman Overby Reynolds