Patents by Inventor Robert Michael Lajoie

Robert Michael Lajoie 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).

  • Taper lock contact tip and head assembly for welding device
    Patent number: 5726420
    Abstract: A contact tip for use with a welding gun includes a tapered portion, a threaded portion, an extension portion and a gripping feature. The tip is elongated and has a first end and a second end. The tip also has a wire feed axis extending therethrough and an axial wire feed aperture extending therethrough. The tapered portion of the tip is at a second end of the tip and has a frustaconical shape. The threaded portion of the tip is adjacent the tapered portion. The extension portion of the tip is adjacent the threaded portion and extends to the first end of the tip. The gripping feature is disposed on the extension portion. The tapered portion serves as a retaining feature.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: March 10, 1998
    Assignee: Tregaskiss Ltd.
    Inventor: Robert Michael Lajoie