Patents by Inventor John M. McFadden

John M. McFadden 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 forming a composite article by metal spraying
    Patent number: 5312650
    Abstract: The method of making a composite article of different metal portions by spraying molten metal on the surface of a solid metal member that has been cleaned and preheated in a controlled atmosphere at low pressure. The molten metal is sprayed on the surface of the solid metal member, preferably by plasma jet spraying. It is rapidly solidified to be adherent to the surface of the solid metal member to form a composite preform. The composite preform is cooled at a rate sufficiently low to reduce residual stresses and then hot pressed to eliminate voids in the sprayed metal portion and metallurgically bonded to the surface of the solid member.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: May 17, 1994
    Assignee: Howmet Corporation
    Inventors: Ranes P. Dalal, John M. McFadden, Mark J. Straszheim, Louis E. Dardi
  • Method for joining materials by metal spraying
    Patent number: 5273204
    Abstract: A method of joining metal materials by spraying molten metal into a cavity between the articles to be joined. Prior to deposition of the metal, the surface of the cavity is cleaned and the articles to be joined are preheated. Subsequent to deposition of the metal within the cavity, the joined articles are cooled at a rate that precludes damage due to thermal effects and the deposited metal is consolidated in the cavity by hot pressing.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: December 28, 1993
    Assignee: Howmet Corporation
    Inventors: Ranes P. Dalal, John M. McFadden, Mark J. Straszheim, Louis E. Dardi