Patents by Inventor Francois Goliard

Francois Goliard 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 and apparatus for sand moulding composite articles with a die made of light alloy and a fibrous insert
    Patent number: 4889177
    Abstract: The invention relates to a method and apparatus for sand molding composite articles formed of a light alloy metal and fibrous insert. A sand mold is formed containing a fibrous preform separated from the walls of the mold cavity. The mold is fed by means of a tube dipping into a liquid metallic bath therebelow. In the molding process, the pressure in the mold cavity and above the bath are reduced, and the pressure above the bath is increased to create a positive pressure differential .DELTA.P, thereby forcing molten metal from the bath into the mold cavity. The pressure in the mold cavity and above the bath are then increased to above atmospheric, and the pressure differential .DELTA.P is maintained until the metal in the mold cavity solidifies.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: December 26, 1989
    Assignee: Cegedur Societe de Transformation de L'Aluminium Pechiney
    Inventors: Jean Charbonnier, Francois Goliard