Patents by Inventor Donald Barry Fergusson

Donald Barry Fergusson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20030067136
    Abstract: A vehicle trailer has a rear end and an air spring suspension. The trailer includes a body, an axle and a pair of wheels mounted on the axle. A pair of air springs extends operatively between the axle and the body. The air springs have sufficient extensibility to allow the body to be raised or lowered with respect to the wheels and to tip downwardly toward the rear end of the trailer to load the trailer. Preferably the trailer has two axles, each said axle having a pair of wheels mounted thereon and a pair of air springs extending between each axle and the body. Preferably there is an air compressor operatively connected to the air springs. The trailer may include a pair of trailing arms pivotally connected to the body adjacent to each axle. The trailing arms are on opposite sides of the body. The air springs are connected between the trailing arms and the body. Preferably there is a multiposition valve connected between the compressor and the air springs to control ride height and tipping of the body.
    Type: Application
    Filed: October 9, 2001
    Publication date: April 10, 2003
    Inventors: Michael Charles Scott, Donald Barry Fergusson