Patents by Inventor David Ian Fretwell

David Ian Fretwell 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).

  • Method of enhancing the bending process of a stabilizer bar
    Patent number: 6384388
    Abstract: A method of enhancing the bending process of a stabilizer bar by locally pre-heating the stabilizer bar immediately prior to formation. By pre-heating the stabilizer bar, the stress in the stabilizer bar is relieved at the bending areas. This allows larger bars to be formed which would otherwise be outside of machine parameters. In the disclosed embodiments, the stabilizer bar is locally heated by induction coils or resistance heating at the bend areas.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: May 7, 2002
    Assignee: Meritor Suspension Systems Company
    Inventors: Gerald D. Anderson, John M. Khoury, Michael W. Mattice, Thomas M. Drouillard, Kermit G. Rowe, III, David Ian Fretwell, Alistair Bruce Christian Lovatt