Patents Assigned to Groupement pour les Activites Atomiques et Avancees "GAAA"
  • Method of preparing insulating refractory products and the product thereof
    Patent number: 4086097
    Abstract: Refractory products having remarkable resistance to thermal shocks, comprising 60% of the total weight of ceramic fibres, dispersed in 40% of the total weight of cement, obtained by slow heating up to 800.degree. C after the setting and the stripping. A chemical bond is set up in those conditions between the fibre and the calcium aluminate of the cement. Application to the manufacturing of parts remaining in contact with reactive molten metals.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: April 25, 1978
    Assignee: Groupement pour les Activites Atomiques et Avancees "GAAA" S.A.
    Inventor: Henri Carbonnel
  • Fluid-tight cold-chamber pressure casting apparatus
    Patent number: 4061176
    Abstract: Apparatus comprising a crucible, a level-determining tank, a vacuum pump, an injection cylinder, a mould and appropriate interconnecting pipes. Molten metal is kept under vacuum throughout except that in a modification a gas may be deliberately introduced into the mould to provide a surface treatment of the casting.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: December 6, 1977
    Assignee: Groupement pour les Activites Atomiques et Avancees "GAAA" S.A.
    Inventor: Henri Carbonnel
  • Partly melting rotating helical ring assembly
    Patent number: 3940150
    Abstract: Partly melting rotating seal assembly surrounding a rotating shaft crossing through a wall limiting a volume of fluid kept under pressure, constituted by a solidified sleeve of the fluid to be sealed or of an intermediate fluid, contained in an external metallic sleeve fast with the wall, provided with cooling means. A very thin thread, fast with the shaft, maintains during the rotation of the shaft, a thin liquid film between the shaft and the solidified sleeve, ensuring sealing along said shaft.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: February 24, 1976
    Assignee: Groupement pour les Activites Atomiques et Avancees "GAAA"
    Inventors: Jean Martin, Jean-Louis Ollier, Paul Petit