Patents by Inventor Alan Marriott

Alan Marriott 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).

  • Process and apparatus for welding sheet metal edges
    Patent number: 5567335
    Abstract: Sheet metal edges to be welded are preheated prior to welding. At a given welding speed, this results in a smaller temperature gradient in the material to be welded. Consequently the welding speed can be increased, or material which would otherwise provide poor weld quality can be welded at a high temperature gradient. The preheating is carried out for example by high-frequency excitation of the material to be welded.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: October 22, 1996
    Assignee: Elpatronic AG
    Inventors: Peter Baessler, Alan Marriott, Urs Maurer, Marcel Oberholzer