Patents by Inventor Michel Hivert

Michel Hivert 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).

  • Propulsion device comprising a block of propellant provided with a central duct of variable section
    Patent number: 5111657
    Abstract: The invention concerns a propulsion device for acceleration of a self-propelled engine, such as a missile or a rocket. The propulsion device comprises a body (1) equipped with a nozzle (2) and a block of propellant (3) having a longitudinal central duct (4) of variable section. The block of propellant comprises a downstream part (5) having a cylindrical duct (6) which has a circular section whose diameter is less than two thirds of the diameter of the throat of the nozzle (2) and an upstream part (7). The duct (8) of this upstream part (7) on the one hand has a diameter which exceeds the diameter of the duct (6) of the downstream part and is less than the diameter of the throat of the nozzle (2), and on the other hand is connected to the duct (6) of the downstream part by a portion in the shape of a truncated cone (9).
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: May 12, 1992
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Michel Hivert, Raymond Coleno