Patents by Inventor Ronald T. Cantrell

Ronald T. Cantrell 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).

  • Liftable tandem axle suspension
    Patent number: 4256326
    Abstract: A liftable tandem axle suspension for a trailer including a central trunion frame mounted on the trailer frame, a front non-liftable axle assembly pivotally mounted on the central trunion frame and extending forwardly thereof, and a rear liftable axle assembly pivotally mounted on the central trunion frame and extending rearwardly thereof so that the rear axle assembly can be lifted when the trailer is not loaded.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: March 17, 1981
    Assignee: Allison Mfg., Inc.
    Inventors: Ronald T. Cantrell, Blaine H. Allison