Patents by Inventor Charles Defrancq

Charles Defrancq 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).

  • Device for fabricating frozen moulding moulds or cores
    Patent number: 4644995
    Abstract: The device comprises a fixed gassing box (1) a moulding box (2) and a head (2A) for receiving and discharging gas. The box (2) is provided with a massive block (7) of aluminium which forms a pattern-plate and has a multitude of orifices (8) extending therethrough. This block has a sufficient thermal inertia to form a frozen crust as soon as the moulding box (2) is filled with a pre-moistened sand or the like. This permits obtaining a high rate of production of frozen moulds or cores having a very good surface condition, a good stability of shape and high and homogeneous mechanical properties.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: February 24, 1987
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Goumy, Charles Defrancq
  • Gray cast iron
    Patent number: 3997338
    Abstract: A gray cast iron is inoculated with 0.3 to 2% inoculating alloy, said inoculating alloy containing from 20 to 70% rare earths.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: December 14, 1976
    Assignee: Centre de Recherches Scientifiques et Techniques de l'Industrie des Fabrications Metalliques, en abrege C.R.I.F.
    Inventors: Jan Van Eeghem, Charles Defrancq