Patent ID: 8840119

Claim:
A modular apparatus for raising and lowering the deck height of a trailer comprising: a trailer frame; two or more wheels each mounted to opposite ends of a drop axle via an air spring mounted between said trailer frame and said wheels, said air springs are connected via one or more compressed air lines to an air compressor connected to an air reservoir tank wherein when said air compressor pulls air to and from said air springs via the compressed air lines into and from the reservoir tank, such that the air springs collapse when the air is drawn out, thereby lowering said trailer frame below the center line of said wheels and the air spring inflate when filled, thereby raising said trailer frame above said centerline of said wheels, wherein said drop axle is further mounted to said trailer frame at each wheel via a squat bar, wherein one end of said squat bar is mounted to said drop axle at each wheel, and an opposite end of said squat bar is adjustably mounted to said trailer frame, and wherein each squat bar is further adjustably mounted via a shock absorber to dynamic height adjustable means.